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| Part Number | PIC18F4321-I/P | PIC18F4331-I/P | PIC18F4321-I/PT | PIC18F4221-I/P | PIC18F4320-I/P | PIC18F4321-E/P |
|---|---|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Active | Active | Active | Active | Active | Active |
| Core Processor | PIC | PIC | PIC | PIC | PIC | PIC |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| Speed | 40MHz | 40MHz | 40MHz | 40MHz | 40MHz | 25MHz |
| Connectivity | I²C, SPI, UART/USART | I²C, SPI, UART/USART | I²C, SPI, UART/USART | I²C, SPI, UART/USART | I²C, SPI, UART/USART | I²C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, HLVD, POR, PWM, WDT | Brown-out Detect/Reset, LVD, Power Control PWM, QEI, POR, PWM, WDT | Brown-out Detect/Reset, HLVD, POR, PWM, WDT | Brown-out Detect/Reset, HLVD, POR, PWM, WDT | Brown-out Detect/Reset, LVD, POR, PWM, WDT | Brown-out Detect/Reset, HLVD, POR, PWM, WDT |
| Number of I/O | 36 | 36 | 36 | 36 | 36 | 36 |
| Program Memory Size | 8KB (4K x 16) | 8KB (4K x 16) | 8KB (4K x 16) | 4KB (2K x 16) | 8KB (4K x 16) | 8KB (4K x 16) |
| Program Memory Type | Flash | Flash | Flash | Flash | Flash | Flash |
| EEPROM Size | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 | 256 x 8 |
| RAM Size | 512 x 8 | 768 x 8 | 512 x 8 | 512 x 8 | 512 x 8 | 512 x 8 |
| Voltage - Supply (Vcc/Vdd) | 4.2V ~ 5.5V | 4.2V ~ 5.5V | 4.2V ~ 5.5V | 4.2V ~ 5.5V | 4.2V ~ 5.5V | 4.2V ~ 5.5V |
| Data Converters | A/D 13x10b | A/D 9x10b | A/D 13x10b | A/D 13x10b | A/D 13x10b | A/D 13x10b |
| Oscillator Type | Internal | Internal | Internal | Internal | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Through Hole | Through Hole | Surface Mount | Through Hole | Through Hole | Through Hole |
| Package / Case | 40-DIP (0.600", 15.24mm) | 40-DIP (0.600", 15.24mm) | 44-TQFP | 40-DIP (0.600", 15.24mm) | 40-DIP (0.600", 15.24mm) | 40-DIP (0.600", 15.24mm) |
| Supplier Device Package | 40-PDIP | 40-PDIP | 44-TQFP (10x10) | 40-PDIP | 40-PDIP | 40-PDIP |
