| Part Number | C8051T321-GM | C8051T323-GM | 
|---|---|---|
| Manufacturer | Silicon Labs | Silicon Labs | 
| Category | Embedded - Microcontrollers | Embedded - Microcontrollers | 
|   |   | |
| Product Status | Obsolete | Obsolete | 
| Core Processor | 8051 | 8051 | 
| Core Size | 8-Bit | 8-Bit | 
| Speed | 48 MIPS | 48 MIPS | 
| Connectivity | I²C, SPI, UART/USART, USB | I²C, SPI, UART/USART, USB | 
| Peripherals | POR, PWM, Temp Sensor, WDT | POR, PWM, WDT | 
| Number of I/O | 21 | 21 | 
| Program Memory Size | 16KB (16K x 8) | 16KB (16K x 8) | 
| Program Memory Type | OTP | OTP | 
| EEPROM Size | - | - | 
| RAM Size | 1.25K x 8 | 1.25K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 1.8V ~ 5.25V | 1.8V ~ 5.25V | 
| Data Converters | A/D 21x10b | - | 
| Oscillator Type | Internal | Internal | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 28-VFQFN Exposed Pad | 28-VFQFN Exposed Pad | 
| Supplier Device Package | 28-QFN (5x5) | 28-QFN (5x5) |