Dimensions:
                                    
                                    
                                        7 x 7 x 1.05mm
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Number of I2C Channels:
                                    
                                    
                                        2
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        USB Channels:
                                    
                                    
                                        1
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Width:
                                    
                                    
                                        7mm
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Program Memory Size:
                                    
                                    
                                        64 kB
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        RAM Size:
                                    
                                    
                                        4.352 kB
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        ADC Channels:
                                    
                                    
                                        32
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Number of Timers:
                                    
                                    
                                        6
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Data Bus Width:
                                    
                                    
                                        8bit
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Instruction Set Architecture:
                                    
                                    
                                        MCU
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Program Memory Type:
                                    
                                    
                                        Flash
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Package Type:
                                    
                                    
                                        QFP
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Maximum Frequency:
                                    
                                    
                                        48MHz
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Maximum Operating Temperature:
                                    
                                    
                                        +85 °C
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Number of UART Channels:
                                    
                                    
                                        2
                                    
                                                                                                        
                                                                                                                
                                    
                                                                                                                
                                    
                                        Family Name:
                                    
                                    
                                        EFM8UB
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Device Core:
                                    
                                    
                                        CIP-51
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        ADC Resolution:
                                    
                                    
                                        10bit
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Timer Resolution:
                                    
                                    
                                        16bit
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Timers:
                                    
                                    
                                        6 x 16 bit
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Number of ADC Units:
                                    
                                    
                                        1
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Pin Count:
                                    
                                    
                                        48
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Pulse Width Modulation:
                                    
                                    
                                        1
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Mounting Type:
                                    
                                    
                                        Surface Mount
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Length:
                                    
                                    
                                        7mm
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Height:
                                    
                                    
                                        1.05mm
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Typical Operating Supply Voltage:
                                    
                                    
                                        3.3 V
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        ADCs:
                                    
                                    
                                        1 (32 x 10 bit)
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Minimum Operating Temperature:
                                    
                                    
                                        -40 °C
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Number of SPI Channels:
                                    
                                    
                                        1
                                    
                                                                                                                                                                    
                                                                                                                
                                                                                                                
                                    
                                                                                                                
                                    
                                        HTSUS:
                                    
                                    
                                        8542.31.0001
                                    
                                                                                                        
                                                                                                                
                                    
                                                                                                                
                                    
                                        Program Memory Size:
                                    
                                    
                                        64KB (64K x 8)
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Peripherals:
                                    
                                    
                                        Brown-out Detect/Reset, POR, PWM, WDT
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Operating Temperature:
                                    
                                    
                                        -40°C ~ 85°C (TA)
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Voltage - Supply (Vcc/Vdd):
                                    
                                    
                                        2.65V ~ 3.6V
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Package / Case:
                                    
                                    
                                        48-TQFP
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        RAM Size:
                                    
                                    
                                        4.25K x 8
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Data Converters:
                                    
                                    
                                        A/D 32x10b
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Program Memory Type:
                                    
                                    
                                        FLASH
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        edacadModel:
                                    
                                    
                                        EFM8UB20F64G-A-QFP48 Models
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Connectivity:
                                    
                                    
                                        EBI/EMI, I2C, SMBus, SPI, UART/USART, USB
                                    
                                                                                                        
                                                                                                                
                                    
                                                                                                                
                                    
                                        edacadModelUrl:
                                    
                                    
                                        /en/models/5115748
                                    
                                                                                                        
                                                                                                                
                                    
                                                                                                                
                                    
                                        EEPROM Size:
                                    
                                    
                                        -
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Oscillator Type:
                                    
                                    
                                        Internal
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Moisture Sensitivity Level (MSL):
                                    
                                    
                                        3  (168 Hours)
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Number of I/O:
                                    
                                    
                                        40
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        DigiKey Programmable:
                                    
                                    
                                        Not Verified
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Core Size:
                                    
                                    
                                        8-Bit
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Mounting Type:
                                    
                                    
                                        Surface Mount
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Series:
                                    
                                    
                                        Universal Bee
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Supplier Device Package:
                                    
                                    
                                        48-TQFP (7x7)
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Packaging:
                                    
                                    
                                        Tray
                                    
                                                                                                        
                                                                                                                
                                                                                                                
                                    
                                                                                                                
                                    
                                        Core Processor:
                                    
                                    
                                        CIP-51 8051
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Speed:
                                    
                                    
                                        48MHz
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        Base Product Number:
                                    
                                    
                                        EFM8UB20
                                    
                                                                                                        
                                    
                                                                                                                
                                    
                                        ECCN:
                                    
                                    
                                        3A991A2