PIC18F2620-I/SP - 8-Bit MCU, 64KB Flash, 40MHz, 28-SPDIP | Microchip
MPN: PIC18F2620-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.1 | $7.10 |
| 10 | $6.4 | $64.00 |
| 100 | $5.75 | $575.00 |
| 500 | $5.2 | $2,600.00 |
| 1,000 | $4.75 | $4,750.00 |
PIC18F2620-I/SP Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), and peripherals such as timers, communication interfaces, and ADCs into a single package. Within the broader taxonomy, an MCU belongs to the microprocessor family -> microcontroller -> 8-bit MCU -> PIC18 family -> PIC18F2x20 sub-family. The PIC18 core is a C-compiler-optimized RISC engine with a single-cycle hardware multiplier and 8x8 hardware multiplier, enabling deterministic instruction execution useful for real-time control loops.
Key features of the PIC18F2620-I/SP include 25 I/O pins, an internal oscillator block supporting 31 kHz to 8 MHz, a Fail-Safe Clock Monitor that allows safe shutdown if the external clock fails, a watchdog timer with its own RC oscillator, and nanoWatt Technology power modes for battery-friendly designs. The 10-bit ADC with up to 10 input channels provides adequate resolution for sensor interfacing, while the ECCP module supports PWM and capture/compare functions for motor-control and lighting applications.
Performance analysis: the PIC18F2620 executes most instructions in one cycle (4 oscillator cycles per instruction), yielding 10 MIPS at the 40 MHz maximum clock. This places the PIC18F2620 between the older PIC16 mid-range MCUs (5 MIPS) and the PIC24/dsPIC 16-bit MCUs (up to 40 MIPS), making it well suited for moderate-throughput industrial control. The internal oscillator eliminates external crystal components in cost-sensitive designs, while the Fail-Safe Clock Monitor preserves system integrity during clock-source failures.
Typical applications include industrial control and embedded automation, motor control (BLDC, stepper, and small DC drives), metering and measurement devices, IoT edge nodes, low-power remote sensor boards, and consumer-electronic user-interface panels. The through-hole 28-SPDIP package simplifies breadboard-based prototyping and field-serviceable designs.
Key design tip: when migrating firmware between PIC18F2620 and PIC18F2525, note that the 2620 variant doubles program Flash and adds peripheral features; verify register maps in the Microchip datasheet family reference manual before porting code. Always place a 100 nF decoupling capacitor within 5 mm of VDD with a short ground return.
This page synthesizes live distributor pricing, drop-in pin-compatible PIC18 alternatives, and practical application notes specifically compiled for engineers evaluating the PIC18F2620-I/SP for new designs or migration from the legacy PIC18F2525/4525/4620 family.
Drop-in alternatives for PIC18F2620-I/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 PIC18F2620-I/SP (same form factor and footprint) — differing in ADC, Package, Operating Temperature, Core Architecture, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F2525-I/SP
✅ Drop-In✓ In Stock
$5.45 / Unit
View Datasheet →PIC18F2520-I/SP
✅ Drop-In✓ In Stock
$3.33 / Unit
View Datasheet →PIC18F2523-I/SP
✅ Drop-In✓ In Stock
$3.65 / Unit
View Datasheet →PIC18F2610-I/SO
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →PIC18F2585-I/SP
✅ Drop-In✓ In Stock
$5.95 / Unit
View Datasheet →PIC18F2620-I/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data Memory (SRAM) | 3968 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Operating Voltage | 4.2 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 10-bit, up to 10 channels |
| Communication Interfaces | Enhanced USART, SPI, I2C |
| PWM / Capture | ECCP module (PWM + Capture/Compare) |
| Internal Oscillator | 31 kHz to 8 MHz |
| Fail-Safe Clock Monitor | Yes |
| Watchdog Timer | Yes, with dedicated RC oscillator |
| Power-Saving Modes | nanoWatt Technology |
| Package | 28-pin SPDIP (SP) |
| Mounting Type | Through-Hole |
| Operating Temperature | -40C to +85C (Industrial) |
| RoHS Status | Compliant |
PIC18F2620-I/SP Pin Configuration
| Pin 1 | MCLR/RE3 — Master Clear (Reset) input / RE3 digital input |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock input / Comparator 1 output |
| Pin 7 | RA5/AN4/SS/HLVDIN/C2OUT — PORTA bit 5 / Analog 4 / SPI SS / HLVD in / Comparator 2 out |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/RA7 — Crystal oscillator input / External clock in / PORTA bit 7 |
| Pin 10 | OSC2/CLKO/RA6 — Crystal oscillator output / Clock out / PORTA bit 6 |
| Pin 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock in |
| Pin 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 I/O |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Pin 14 | RC3/SCK/SCL — PORTC bit 3 / SPI SCK / I2C SCL |
| Pin 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Pin 18 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply (4.2V-5.5V) |
| Pin 21 | RB0/INT0/FLT0 — PORTB bit 0 / External interrupt 0 / PWM fault input |
| Pin 22 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pin 23 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Pin 24 | RB3/CCP2 — PORTB bit 3 / CCP2 I/O |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5/PGM — PORTB bit 5 / LVP programming input |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC18F2620-I/SP is suitable for 7 applications: Industrial Motor Control, Smart Energy Metering, Embedded Automation I/O Modules, Consumer Appliance Control Boards, Low-Power Remote Sensor Boards, HMI / User Interface Panels, Educational & Prototyping Boards.
Industrial Motor Control
The PIC18F2620-I/SP is well matched to industrial motor-control boards driving small BLDC, stepper, or DC brushed motors from a 5V rail. The integrated ECPP/CCP module produces a 10-bit-resolution PWM suitable for H-bridge control signals, while the 10 MIPS core bandwidth handles sensorless commutation loops with sub-50uS jitter. The 25 I/O pins drive direction, brake, enable, and tachometer-feedback signals without external glue logic, and the integrated 10-bit ADC samples shunt currents for current-mode torque limiting. Compared with a 32-bit Cortex-M0 alternative, the PIC18F2620 offers deterministic instruction timing, easier IEC 60730 code-safety review, and a familiar 8-bit toolchain. Place a 100 nF ceramic decoupling within 5 mm of VDD and a bulk 10 uF at the regulator input.
Recommended
Smart Energy Metering
For single-phase residential or commercial metering designs, the PIC18F2620-I/SP combines a 10-bit ADC with the USART/SPI/I2C peripherals needed to drive a metering front-end. The internal oscillator (31 kHz to 8 MHz) eliminates a costly external crystal, while nanoWatt Technology reduces standby power to support battery-backed metering field-replacement scenarios. The 64 KB Flash absorbs segmented metrology stacks (calibration tables, segmented LCD drivers, tamper logs) without external EEPROM. The Fail-Safe Clock Monitor preserves measurement integrity during oscillator drift events - critical for revenue-meter accuracy. The 28-SPDIP package aids field serviceability in remote-site installations.
Recommended
Embedded Automation I/O Modules
The PIC18F2620-I/SP is frequently specified for industrial 24V-tolerant I/O modules that need to debounce, latch, and log multi-channel digital signals. With 25 I/O and a 40 MHz core, the part scans 8-16 inputs per ISR pass while still leaving CPU headroom for Modbus RTU over the USART. The ECPP module drives optocoupler LEDs directly, allowing low-side switching without external transistors. Watchdog timer with a dedicated RC oscillator catches firmware lockups during EMC events - essential for IEC 61000-4 industrial environments. The SPDIP-28 through-hole package survives conformal-coating and field-replacement workflows better than leadless QFN alternatives.
Recommended
Consumer Appliance Control Boards
White-goods OEMs frequently use PIC18F2620-I/SP for washing-machine, dishwasher, and induction-cooktop user-interface and motor-control boards. The 64 KB Flash accommodates display state-machine code plus self-test routines required by IEC 60335 functional-safety reviews. nanoWatt Technology sleep currents under 1 uA extend standby-day ratings for appliances with always-on displays. The 10-bit ADC reads temperature sensors (NTC), water-level probes, and rotary-encoder knob positions. The 28-SPDIP package supports manual rework at service centers - a key advantage for consumer after-sales support. Compared to an ARM Cortex-M0+ MCU, the PIC18F2620 typically costs less and offers a smaller toolchain footprint for legacy codebases.
Recommended
Low-Power Remote Sensor Boards
Battery-powered remote sensor designs benefit from the PIC18F2620-I/SP nanoWatt Technology power-management modes, which permit Sleep-mode ADC conversion with auto-wake on threshold - useful for thermostats, weather stations, and irrigation controllers. The internal 31 kHz-8 MHz oscillator preserves battery energy that would otherwise be lost to external crystal warm-up. The 3968 bytes SRAM buffers sensor-burst data between transmit intervals. The USART/SPI/I2C peripherals directly interface LoRa or sub-GHz radio modules without an external glue logic. Compared to a more powerful MCU, the PIC18F2620 keeps bill-of-materials cost down while providing solid C-compiler efficiency for battery-aware application stacks.
Recommended
HMI / User Interface Panels
The PIC18F2620-I/SP drives small segment-LCD, LED, or character-display user interfaces on building-automation and audio-equipment front panels. The SPI/I2C peripherals connect to display-driver ICs and capacitive-touch controllers, while 25 I/O scan matrix keypads with no external multiplexer. The 64 KB Flash holds full state-machine UIs, multi-language strings, and field-update bootloaders. The 40 MHz core drives 4-line character displays with sub-20 ms page-flip latency. Compared to an ARM Cortex-M0+ part, the PIC18F2620 consumes less active current at equivalent throughput - advantageous for touchscreen UIs that idle often between user inputs.
Recommended
Educational & Prototyping Boards
The PIC18F2620-I/SP's 28-SPDIP through-hole package is the classic choice for breadboard-based teaching labs and engineering-prototyping kits. Students can hot-swap and replace the MCU without reflow tools, while educators benefit from mature MPLAB X IDE, XC8 compiler, and Microchip's PICkit 5 in-circuit debugger support. The 10 MIPS throughput, 25 I/O, USART/SPI/I2C, and 10-bit ADC provide a comprehensive teaching canvas covering GPIO, timers, interrupts, ADC, and serial protocols in a single chip. The built-in Fail-Safe Clock Monitor teaches clock-fault detection techniques used in safety-critical design. Compared to QFN-only modern MCUs, the SPDIP variant dramatically lowers the barrier to entry.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F2620-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F2525-I/SP | PIC18F2520-I/SP | PIC18F2523-I/SP | PIC18F2585-I/SP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP (SP) | 28-SPDIP (SP) - same | 28-SPDIP (SP) - same | 28-SPDIP (SP) - same | 28-SPDIP (SP) - same |
| Program Flash | 64 KB | 32 KB | 32 KB | 32 KB | 48 KB |
| SRAM | 3968 bytes | 1536 bytes | 768 bytes | 1536 bytes | 3328 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 12-bit | 10-bit |
| CAN Module | No | No | No | No | Yes (CAN) |
| Operating Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
| I/O Pins | 25 | 25 | 25 | 25 | 25 |
| Lifecycle Status | Active | Active | Active | Active | Active |
Key Differentiators
- Largest Flash in the PIC18F2x20 28-SPDIP family (vs PIC18F2525-I/SP)
- Higher RAM than the 2525/2520 siblings (vs PIC18F2520-I/SP)
- Internal oscillator with Fail-Safe Clock Monitor saves BOM cost (vs PIC18F2523-I/SP)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin with a short, direct ground return to the nearest VSS pin. Bulk-decouple VDD with a 10 uF tantalum or ceramic capacitor at the regulator output. The PIC18F2620-I/SP operates from 4.2V-5.5V; for 3.3V systems use the PIC18LF2620 variant. Sleep-mode supply current drops to under 1 uA with the right configuration.
Route the ICSP clock (PGC, pin 27) and ICSP data (PGD, pin 28) traces with parallel ground returns, kept short and away from switching noise sources. For 28-SPDIP through-hole prototypes, install ICSP header pads or a 6-pin RJ12 footprint to enable in-circuit programming with PICkit 5. The 28-SPDIP outline matches standard breadboard pinning, but ensure pin 1 (MCLR) and pin 28 (RB7/PGD) are oriented correctly per datasheet figure.
Do not omit the MCLR pull-up (typically 10 kOhm to VDD); operation without it causes erratic resets under noisy conditions. Ensure the analog and digital supply pins are routed with proper isolation - the AVDD pin source impedance should be below 5 Ohm. When migrating firmware from PIC18F2525, note that RAM-start address and register banks differ; rebuild with the PIC18F2620 header file to avoid pointer corruption.
The PIC18F2620-I/SP is rated industrial -40C to +85C operating temperature. The 28-SPDIP junction-to-ambient thermal resistance is approximately 80 C/W in still air. At 10 MIPS compute load and 5.0V supply, total power dissipation stays under 250 mW, well below thermal limits. For sealed enclosures above 60C ambient, validate derating with Microchip Application Note AN1225 for proper MCLR and clock-extender configuration.
Compliance Information
RoHS and REACH compliant per Microchip product page; not AEC-Q100 qualified (consumer/industrial use). Lead-free SPDIP finish with matte-tin leads. Conflict-minerals compliant per Microchip supplier declarations.
