| Part Number | EFM8SB20F32G-B-QFN24 | EFM8SB20F32G-A-QFN24 | 
|---|---|---|
| Manufacturer | Silicon Labs | Silicon Labs | 
| Category | Embedded - Microcontrollers | Embedded - Microcontrollers | 
|   |   | |
| Product Status | Active | Discontinued at Digi-Key | 
| Core Processor | CIP-51 8051 | CIP-51 8051 | 
| Core Size | 8-Bit | 8-Bit | 
| Speed | 25MHz | 25MHz | 
| Connectivity | EBI/EMI, I²C, SMBus, SPI, UART/USART | EBI/EMI, I²C, SMBus, SPI, UART/USART | 
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | 
| Number of I/O | 16 | 16 | 
| Program Memory Size | 32KB (32K x 8) | 32KB (32K x 8) | 
| Program Memory Type | Flash | Flash | 
| EEPROM Size | - | - | 
| RAM Size | 4.25K x 8 | 4.25K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 1.8V ~ 3.6V | 1.8V ~ 3.6V | 
| Data Converters | A/D 15x10b | A/D 15x10b | 
| Oscillator Type | Internal | Internal | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 24-WFQFN Exposed Pad | 24-WFQFN Exposed Pad | 
| Supplier Device Package | 24-QFN (4x4) | 24-QFN (4x4) |