| Part Number | R5F2M120ANSP#W4 | R5F2M121ANSP#W4 | 
|---|---|---|
| Manufacturer | Renesas Electronics America Inc | Renesas Electronics America Inc | 
| Category | Embedded - Microcontrollers | Embedded - Microcontrollers | 
|   |   | |
| Product Status | Not For New Designs | Active | 
| Core Processor | R8C | R8C | 
| Core Size | 16-Bit | 16-Bit | 
| Speed | 20MHz | 20MHz | 
| Connectivity | UART/USART | UART/USART | 
| Peripherals | POR, PWM, Voltage Detect, WDT | POR, PWM, Voltage Detect, WDT | 
| Number of I/O | 17 | 17 | 
| Program Memory Size | 2KB (2K x 8) | 4KB (4K x 8) | 
| Program Memory Type | Flash | Flash | 
| EEPROM Size | - | - | 
| RAM Size | 256 x 8 | 384 x 8 | 
| Voltage - Supply (Vcc/Vdd) | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 
| Data Converters | A/D 6x10b | A/D 6x10b | 
| Oscillator Type | Internal | Internal | 
| Operating Temperature | -20°C ~ 85°C (TA) | -20°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 20-LSSOP (0.173", 4.40mm Width) | 20-LSSOP (0.173", 4.40mm Width) | 
| Supplier Device Package | 20-LSSOP | 20-LSSOP |