| Part Number | C8051T631-GM | C8051T621-GM |
|---|---|---|
| Manufacturer | Silicon Labs | Silicon Labs |
| Category | Embedded - Microcontrollers | Embedded - Microcontrollers |
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| Product Status | Last Time Buy | Obsolete |
| Core Processor | 8051 | 8051 |
| Core Size | 8-Bit | 8-Bit |
| Speed | 25MHz | 48 MIPS |
| Connectivity | SMBus (2-Wire/I²C), SPI, UART/USART | I²C, SPI, UART/USART, USB |
| Peripherals | POR, PWM, WDT | POR, PWM, WDT |
| Number of I/O | 17 | 24 |
| Program Memory Size | 8KB (8K x 8) | 16KB (16K x 8) |
| Program Memory Type | OTP | OTP |
| EEPROM Size | - | - |
| RAM Size | 768 x 8 | 1.25K x 8 |
| Voltage - Supply (Vcc/Vdd) | 1.8V ~ 3.6V | 1.8V ~ 5.25V |
| Data Converters | - | - |
| Oscillator Type | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 20-VFQFN Exposed Pad | 32-VFQFN Exposed Pad |
| Supplier Device Package | 20-QFN (4x4) | 32-QFN (5x5) |