PIC18F2320-E/SP - 8KB Flash 25MHz 8-bit MCU | Microchip
MPN: PIC18F2320-E/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.99 | $5.99 |
| 10 | $5.39 | $53.90 |
| 100 | $4.79 | $479.00 |
| 500 | $4.19 | $2,095.00 |
| 1,000 | $3.59 | $3,590.00 |
PIC18F2320-E/SP Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, non-volatile storage, and programmable peripherals. The PIC18 family uses Microchip's enhanced Harvard RISC architecture with a 16-bit instruction word and an 8-bit data path, sitting in the broader hierarchy: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor. PIC18 devices are C compiler-friendly (MPLAB XC8), widely used in cost-sensitive industrial and consumer designs where 5V tolerant I/O, deterministic interrupt latency, and long-life flash retention matter more than raw MHz.
Key specifications include a 25 MHz maximum clock (40 ns instruction cycle at 4x PLL), 10 channels of 10-bit ADC, two analog comparators, two Capture/Compare/PWM modules, a synchronous serial port configurable as SPI or I2C, an ICD (In-Circuit Debug) interface, and self-programming capability for boot-loader upgrades. The 'E' temperature grade designates the -40C to +125C extended industrial range, while the '/SP' suffix denotes the 28-pin 0.300-inch SPDIP tube package.
The architecture is built around a 16-bit enhanced instruction set with hardware multiplier, 32 kHz secondary oscillator for low-power Timer1 operation, and dual oscillator options for USB-friendly clocking on sibling parts. Internal peripherals are mapped through Microchip's standard peripheral libraries and are accessible via the MPLAB X IDE tool chain, ensuring broad third-party code support.
Typical applications include industrial control, sensor interface boards, low-end consumer appliances, motor control signal conditioning, and hobby/educational platforms where the PIC18 ecosystem, easy programming (ICSP), and long-term Microchip supply commitments outweigh the appeal of newer Cortex-M0 parts. Designers also use the PIC18F2320 as a co-processor in mixed-rail systems needing 5V I/O tolerance.
When designing with this device, budget the oscillator start-up timer (OST) and power-on reset (PWRT) delays in time-critical loops, and place the decoupling 100 nF capacitor within 5 mm of VDD. For high-noise environments, enable the hardware Watchdog Timer with a postscaler longer than the longest legitimate loop iteration.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC18F2320-E/SP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18F2320-E/SP (same form factor and footprint) — differing in Package, ADC, Core Architecture, Mounting Type, Maximum CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F2320-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F2320-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F2420-I/SP
✅ Drop-In✓ In Stock
$5.22 / Unit
View Datasheet →PIC18F2220-I/SP
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC18F1320-I/P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F1330-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.95 / Unit
View Datasheet →PIC18F2320-E/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit enhanced Harvard RISC) |
| Program Memory (Flash) | 8 KB (4K x 16 words) |
| Data SRAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 25 MHz (10 MIPS, 16 MIPS peak) |
| Instruction Cycle Time | 200 ns (at 20 MHz); 160 ns (at 25 MHz) |
| Supply Voltage (VDD) | 4.2 V to 5.5 V (5V operation) |
| I/O Pins | 25 |
| ADC | 10 channels x 10-bit |
| Analog Comparators | 2 |
| Capture/Compare/PWM (CCP) | 2 modules |
| Serial Interfaces | 1x MSSP (SPI / I2C) |
| Timers | Timer0, Timer1, Timer2, Timer3 |
| Operating Temperature Range | -40C to +125C (E = extended grade) |
| Package | 28-pin SPDIP (0.300 inch, 7.62 mm) |
| Mounting Type | Through-Hole |
| MSL Level | 1 (unlimited) |
PIC18F2320-E/SP Pin Configuration
| Pin 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage / digital input RE3 |
| Pin 2 | RA0/AN0 — Digital I/O RA0 / analog input AN0 |
| Pin 3 | RA1/AN1 — Digital I/O RA1 / analog input AN1 |
| Pin 4 | RA2/AN2/VREF- — Digital I/O RA2 / analog input AN2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — Digital I/O RA3 / analog input AN3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — Digital I/O RA4 / Timer0 external clock input |
| Pin 7 | RA5/AN4/SS — Digital I/O RA5 / analog input AN4 / SPI slave select |
| Pin 8 | OSC1/RA7 — Crystal oscillator input / digital I/O RA7 |
| Pin 9 | OSC2/RA6 — Crystal oscillator output / digital I/O RA6 |
| Pin 10 | RC0/T1OSO/T1CKI — Digital I/O RC0 / Timer1 oscillator output / Timer1 clock input |
| Pin 11 | RC1/T1OSI/CCP2 — Digital I/O RC1 / Timer1 oscillator input / CCP2 output |
| Pin 12 | RC2/CCP1 — Digital I/O RC2 / CCP1 output |
| Pin 13 | RC3/SCK/SCL — Digital I/O RC3 / SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA — Digital I/O RC4 / SPI data in / I2C data |
| Pin 15 | RC5/SDO — Digital I/O RC5 / SPI data out |
| Pin 16 | RC6/TX/CK — Digital I/O RC6 / USART TX / USART clock |
| Pin 17 | RC7/RX/DT — Digital I/O RC7 / USART RX / USART data |
| Pin 18 | VSS — Ground reference |
| Pin 19 | VDD — Positive supply (4.2V-5.5V) |
| Pin 20 | RB0/INT0/AN10 — Digital I/O RB0 / external interrupt 0 / analog input AN10 |
| Pin 21 | RB1/INT1 — Digital I/O RB1 / external interrupt 1 |
| Pin 22 | RB2/INT2 — Digital I/O RB2 / external interrupt 2 |
| Pin 23 | RB3/AN9/CCP2 — Digital I/O RB3 / analog input AN9 / CCP2 output |
| Pin 24 | RB4/AN8 — Digital I/O RB4 / analog input AN8 |
| Pin 25 | RB5/AN7 — Digital I/O RB5 / analog input AN7 |
| Pin 26 | RB6/AN6/PGC — Digital I/O RB6 / analog input AN6 / ICSP clock |
| Pin 27 | RB7/AN5/PGD — Digital I/O RB7 / analog input AN5 / ICSP data |
| Pin 28 | VSS — Ground reference |
Typical Applications
PIC18F2320-E/SP is suitable for 6 applications: Industrial Sensor Interface Board, Low-End Consumer Appliance Controller, Motor Control Signal Conditioning, Hobby / Educational Development Platform, Mixed-Rail 5V/3.3V Co-Processor, Automotive Body Electronics Sub-Node.
Industrial Sensor Interface Board
The PIC18F2320-E/SP's 10-channel 10-bit ADC, 25 digital I/O, and 5V tolerant operation make it a strong fit for industrial sensor-interface boards reading 4-20 mA loops, thermistors, and digital encoders. Its 8 KB flash and 512 bytes SRAM are sufficient for table-driven calibration, while the 256-byte EEPROM stores non-volatile calibration constants across power cycles. The extended -40C to +125C grade covers outdoor and cabinet-mounted installations. Placed on the backplane near connector headers with proper RC filtering on analog inputs, the MCU aggregates multi-channel sensor data and forwards it over RS-485 or SPI to a host controller, replacing more expensive 16-bit parts in moderate-density designs.
Recommended
Low-End Consumer Appliance Controller
The PIC18F2320-E/SP targets cost-sensitive 5V consumer appliances such as coffee machines, washing-machine sub-boards, and kitchen-hood controllers where deterministic control loops matter more than raw MHz. Its 2 CCP modules drive TRIAC phase-angle dimming or brushed-DC motor PWM, while the analog comparators implement over-current and zero-cross detection. The 8 KB flash comfortably hosts state-machine firmware with menu logic, and ICSP allows end-of-line programming through a 6-pin header. In a typical coffee-machine controller, the MCU reads a thermistor via ADC, switches a heating element via TRIAC+comparator feedback, and drives a 7-segment LED display through multiplexed I/O - a complete BOM centerpiece under $3.
Recommended
Motor Control Signal Conditioning
The PIC18F2320-E/SP is well suited to motor-control auxiliary boards that handle signal conditioning rather than the main FOC loop. Its 2 CCP channels provide auxiliary PWM for cooling-fan speed control, while the 2 analog comparators detect back-EMF zero-cross events for sensorless commutation on small BLDC fans. The 25 MHz core runs interrupt-driven control loops at well below 1 us latency, and the 10-bit ADC at 100 ksps samples shunt currents or thermistors for over-current and thermal protection. Housed in a 28-pin SPDIP, the MCU fits on through-hole daughter-cards paired with a dedicated motor-control DSPIC on the main board.
Recommended
Hobby / Educational Development Platform
The PIC18F2320-E/SP's through-hole 28-pin SPDIP package makes it breadboard-friendly for hobbyists, makers, and university embedded courses. The 25 MHz core and 8 KB flash support introductory C projects (XC8 compiler), while the ICSP pins (RB6/RB7) connect directly to a PICkit 4 programmer for student debugging. The 25 I/O lines comfortably drive LEDs, pushbuttons, character LCDs, and small 7-segment displays without external multiplexers. Course labs can exercise ADC reading of a potentiometer, PWM brightness control, and I2C EEPROM emulation - all on the same chip - making the PIC18F2320-E/SP an enduring teaching workhorse.
Recommended
Mixed-Rail 5V/3.3V Co-Processor
The PIC18F2320-E/SP serves as an ideal 5V-tolerant co-processor next to a 3.3V Cortex-M host on mixed-rail boards. Its 5V-tolerant I/O eliminates level-shifters on a SPI or UART bridge to the 3.3V main MCU, while the 8 KB flash runs protocol-translation or housekeeping firmware. The 256-byte EEPROM stores user-configurable settings without external non-volatile memory. In a typical use case, the host runs the main application, and the PIC18 handles legacy 5V peripherals (industrial sensors, classic LCD modules, RS-232 transceivers) - a small BOM addition that preserves design flexibility.
Recommended
Automotive Body Electronics Sub-Node
Although the PIC18F2320-E/SP lacks AEC-Q100 qualification, its extended -40C to +125C grade supports non-safety automotive body-electronics nodes such as ambient-light controllers, mirror-adjust modules, and interior LED drivers in commercial-vehicle cabins. The 10-bit ADC reads potentiometers and photodioders for smooth motor control, while the 2 CCP modules generate PWM dimming for LED strings. The MSSP SPI/I2C port attaches to the vehicle body-network transceiver for command reception. Designers target AEC-Q100-qualified PIC18 cousins for safety-critical applications but use this part for sub-systems where automotive certification is not required.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F2320-E/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F2320-I/SP | PIC18F2420-I/SP | PIC18F2220-I/SP | PIC18F1320-I/P | PIC18F1330-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SPDIP | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin SPDIP - same | 28-pin PDIP - same | 28-pin SOIC - silicon compatible, different footprint |
| Program Memory (Flash) | 8 KB | 8 KB | 16 KB | 4 KB | 4 KB | 8 KB |
| Data SRAM | 512 bytes | 512 bytes | 768 bytes | 512 bytes | 256 bytes | 512 bytes |
| Data EEPROM | 256 bytes | 256 bytes | 256 bytes | 128 bytes | 256 bytes | 256 bytes |
| Maximum CPU Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 20 MHz | 25 MHz |
| I/O Pins | 25 | 25 | 25 | 25 | 22 | 24 |
| Operating Temperature | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) |
Key Differentiators
- Extended -40C to +125C operating temperature range (vs PIC18F2320-I/SP)
- 8 KB flash with 10 MIPS sustained performance (vs PIC18F2220-I/SP)
- Through-hole SPDIP package for breadboard prototyping (vs PIC18F2320-I/SO)
- 10-channel 10-bit ADC plus 2 comparators on-chip (vs PIC18F1320-I/P)
Design Notes
The PIC18F2320-E/SP operates from a single 4.2V-5.5V supply; place a 100 nF decoupling capacitor within 5 mm of VDD (pin 20 and pin 1) and a bulk 10 uF tantalum or ceramic at the board entry point. For mixed-rail designs, level-shift any 3.3V peripheral interface signals through a dedicated buffer (e.g., TXS0108E) rather than direct connection, because the PIC18 I/O is 5V tolerant only when VDD = 5V.
Estimated: at 25 MHz and full I/O toggling, the PIC18F2320-E/SP draws approximately 25 mA from VDD (about 125 mW). The 28-pin SPDIP has a theta_JA of approximately 70 C/W in still air, producing a junction-temperature rise of 9C above ambient - well within the +125C limit. Designers in enclosed high-temperature environments should still verify with a thermocouple on the package.
Route the ICSP clock and data lines (RB6/RB7) directly to a 6-pin programming header with no series resistors or capacitors; adding them blocks in-circuit programming. Place the crystal or resonator within 10 mm of OSC1/OSC2 (pins 9 and 10) and guard the traces with a grounded copper pour to minimize EMI. Keep analog-input traces short and routed away from digital switching lines to reduce ADC noise pickup.
Common pitfalls: (1) Forgetting to configure the A/D port configuration bits, leaving analog pins floating and causing ADC drift. (2) Failing to clear the RCON register on power-up, which masks subsequent brown-out resets. (3) Using the internal oscillator without enabling the PLL and expecting 25 MHz operation. (4) Driving MCLR low for longer than the extended-power-on-reset (PWRT) delay and missing the start-up window. Always read CONFIG bytes from the hex file before programming.
Compliance Information
Lead-free per Microchip packaging standard; RoHS/REACH status not directly stated in the verified web data - [DATA_NEEDED] for confirmation. The E temperature grade is industrial-extended, but the part is not AEC-Q100 qualified for safety-critical automotive applications.
