PIC18F2620-E/SO - 8-Bit MCU 25MHz 64KB Flash 28-SOIC | Microchip
MPN: PIC18F2620-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.91 | $6.91 |
| 10 | $6.13 | $61.30 |
| 100 | $5.42 | $542.00 |
| 500 | $4.78 | $2,390.00 |
| 1,000 | $4.21 | $4,210.00 |
PIC18F2620-E/SO Overview
Key features include 10 MIPS performance from a C-compiler-optimized RISC architecture, single-cycle 8x8 hardware multiplier, Fail-Safe Clock Monitor for safe shutdown on clock failure, and a separate-oscillator Watchdog Timer for robust field operation. The PIC18F2620 family introduces design enhancements that make these microcontrollers a logical choice for many high-performance and power-sensitive applications. NanoWatt power management, Enhanced Capture/Compare/PWM (ECCP) modules, and a 10-bit ADC round out the peripheral set.
What is a PIC18F microcontroller? The PIC18F is Microchip's enhanced 8-bit Harvard-architecture RISC MCU family - a microcontroller is a single-chip computer integrating CPU, memory, and peripherals. PIC18F -> PIC18 family -> PIC microcontrollers -> 8-bit MCU -> microcontroller -> embedded IC. This taxonomy positions the part at the high end of the 8-bit performance range, between baseline PIC16 parts and the 16-bit dsPIC/PIC24 line.
Typical applications include industrial control nodes, sensor conditioning with on-chip ADC, USB-less (pre-PIC18F2550 family) embedded control, white-goods motor control via ECCP, and battery-backed instrumentation where nanoWatt modes extend runtime. The -E suffix denotes the -40C to +125C extended operating-temperature range suitable for industrial and outdoor environments.
When designing with this device, place a 0.1 uF decoupling capacitor within 5 mm of each power pin (VDD/VSS pairs) and use a 10 uF bulk capacitor near the IC. Configure the MCLR pin with the recommended 10 kohm pull-up to VDD to avoid spurious resets during power-up. The internal 8 MHz oscillator trims via OSCCON registers and the PLL can multiply the internal clock, allowing BOM savings versus an external crystal.
Drop-in alternatives for PIC18F2620-E/SO — 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-E/SO (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Core Architecture, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F2620-I/SO
✅ Drop-In✓ In Stock
$5.21 / Unit
View Datasheet →PIC18F2620T-I/SO
✅ Drop-In✓ In Stock
$5.4 / Unit
View Datasheet →PIC18F2520-E/SO
✅ Drop-In✓ In Stock
$4.36 / Unit
View Datasheet →PIC18F25K22-I/SO
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC18F2580-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F2620-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Core | PIC18F |
| Family | PIC18F2525/2620/4525/4620 |
| Maximum CPU Speed | 25 MHz (10 MIPS) |
| Program Memory | 64 KB Flash (32K x 16) |
| RAM | 3,968 bytes |
| I/O Pins | 25 |
| Supply Voltage | 4.2 V to 5.5 V |
| Operating Temperature | -40 C to +125 C (Extended, -E suffix) |
| Package | 28-pin SOIC (wide-body) |
| Mounting Type | Surface Mount |
| ADC | 10-bit |
| Internal Oscillator | 31 kHz to 8 MHz |
| Hardware Multiplier | 8 x 8 single-cycle |
| Watchdog Timer | Yes, with separate RC oscillator |
| Fail-Safe Clock Monitor | Yes |
| RoHS Status | Compliant |
PIC18F2620-E/SO Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 — Digital I/O / analog input channel 0 |
| Pin 3 | RA1/AN1 — Digital I/O / analog input channel 1 |
| Pin 4 | RA2/AN2/VREF- — Digital I/O / analog input channel 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — Digital I/O / analog input channel 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — Digital I/O / analog input channel 4 / SPI slave select |
| Pin 8 | OSC1/RA7 — Crystal oscillator input / digital I/O |
| Pin 9 | OSC2/RA6 — Crystal oscillator output / digital I/O |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply (4.2 V to 5.5 V) |
| Pin 12 | RB0/INT0 — Digital I/O / external interrupt 0 |
| Pin 13 | RB1/INT1 — Digital I/O / external interrupt 1 |
| Pin 14 | RB2 — Digital I/O |
| Pin 15 | RB3 — Digital I/O |
| Pin 16 | RB4 — Digital I/O |
| Pin 17 | RB5 — Digital I/O |
| Pin 18 | RB6/PGC — Digital I/O / ICSP clock |
| Pin 19 | RB7/PGD — Digital I/O / ICSP data |
| Pin 20 | VSS — Ground reference |
| Pin 21 | VDD — Positive supply (4.2 V to 5.5 V) |
| Pin 22 | RC0 — Digital I/O |
| Pin 23 | RC1 — Digital I/O |
| Pin 24 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM 1 |
| Pin 25 | RC3 — Digital I/O |
| Pin 26 | RC4 — Digital I/O |
| Pin 27 | RC5 — Digital I/O |
| Pin 28 | RC6/TX/CK — Digital I/O / USART TX / clock |
Typical Applications
PIC18F2620-E/SO is suitable for 6 applications: Industrial Control Nodes, White-Goods Motor Control, Sensor Conditioning with On-Chip ADC, Battery-Backed Instrumentation, HVAC and Building Automation, Automotive Body Electronics (Non-Safety).
Industrial Control Nodes
The PIC18F2620-E/SO fits industrial control nodes because its 64 KB Enhanced Flash holds large ladder-logic firmware and its 25 I/O pins drive sensors, relays, and HMI interfaces at 5 V. The -40 C to +125 C operating range lets the same PCB survive factory-floor cabinets and outdoor enclosures without thermal derating. The Fail-Safe Clock Monitor allows safe shutdown if the external crystal fails, while the 10-bit ADC digitizes 4-20 mA loop signals directly. Pair with a PIC18F25K22-I/SO for new low-power variants.
Recommended
White-Goods Motor Control
The PIC18F2620-E/SO's Enhanced Capture/Compare/PWM (ECCP) module generates precise PWM outputs for washing-machine, dishwasher, and refrigerator motor control at 5 V logic. The hardware 8x8 multiplier executes single-cycle PID math for closed-loop speed regulation, while 64 KB Flash accommodates the full motor-control state machine and lookup tables. The wide-temperature grade survives compressor-coastal heat soak. Use PIC18F2520-E/SO for cost-down designs with reduced firmware footprint.
Recommended
Sensor Conditioning with On-Chip ADC
The PIC18F2620-E/SO's 10-bit ADC and 25 MHz core digitize thermocouple, strain-gauge, and pressure-sensor signals in real time. With 64 KB Flash, designers embed calibration tables and digital-filter routines (FIR/IIR) without external memory; the 3,968 bytes RAM buffers multi-channel sample streams. The internal oscillator eliminates an external crystal, reducing BOM cost for sealed sensor probes. Pair with PIC18F2585-I/SO when CAN bus reporting is required.
Recommended
Battery-Backed Instrumentation
The PIC18F2620-E/SO's nanoWatt power-management modes reduce sleep current to microamp levels, extending runtime in battery-backed metering and remote-monitoring instruments. The internal 31 kHz-8 MHz oscillator lets the MCU wake on RTCC interrupts without external components, while 64 KB Flash stores months of logging data with circular buffers. The wide supply range (4.2-5.5 V) accepts direct battery connections with simple LDO regulation.
Recommended
HVAC and Building Automation
The PIC18F2620-E/SO suits HVAC and building-automation controllers because its 25 I/O pins interface directly to relays, TRIAC drivers, and 0-10 V analog actuator outputs at 5 V. The ECCP module produces phase-angle or zero-cross TRIAC firing pulses for AC load dimming, while 64 KB Flash stores schedule logic and Modbus/RTU stacks. The industrial -E temperature grade tolerates rooftop and basement cabinet environments without active cooling.
Recommended
Automotive Body Electronics (Non-Safety)
The PIC18F2620-E/SO fits automotive body-electronics modules (interior lighting, seat controllers, mirror adjusters) where the -40 C to +125 C range handles under-dash thermal stress and 64 KB Flash holds body-control firmware. The internal oscillator with PLL simplifies PCB layout versus external crystals, while 25 I/O drive low-side MOSFET switches directly. For safety-critical domains, migrate to PIC18F46K22 family; for CAN bus, choose PIC18F2580-I/SO.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F2620-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F2620-I/SO | PIC18F2520-E/SO | PIC18F25K22-I/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (wide-body) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Program Memory | 64 KB Flash | 64 KB Flash | 32 KB Flash (-50%) | 32 KB Flash (-50%) |
| Maximum CPU Speed | 25 MHz (10 MIPS) | 25 MHz (10 MIPS) | 25 MHz (10 MIPS) | 64 MHz (16 MIPS) |
| RAM | 3,968 bytes | 3,968 bytes | 1,536 bytes | 1,536 bytes |
| Operating Temperature | -40 C to +125 C (-E extended) | -40 C to +85 C (industrial) | -40 C to +125 C (-E) | -40 C to +85 C (industrial) |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 1.8 V to 5.5 V (XLP) |
| Internal Oscillator | 31 kHz to 8 MHz | 31 kHz to 8 MHz | 31 kHz to 8 MHz | 31 kHz to 16 MHz (HF) |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit |
| nanoWatt XLP Power Modes | No (legacy nanoWatt) | No (legacy nanoWatt) | No (legacy nanoWatt) | Yes (XLP) |
Key Differentiators
- Extended -40 C to +125 C temperature grade in same 28-SOIC package (vs PIC18F2620-I/SO)
- 64 KB Enhanced Flash vs 32 KB Flash for legacy firmware reuse (vs PIC18F2520-E/SO)
- Mature legacy silicon with wide 5 V supply tolerance (vs PIC18F25K22-I/SO)
Design Notes
Place a 0.1 uF decoupling capacitor within 5 mm of each VDD/VSS pair (pins 11/10 and 21/20) and add a single 10 uF bulk tantalum or ceramic capacitor on the same 5 V rail. Estimated: at 25 MHz and 5 V supply the PIC18F2620-E/SO typically draws ~15-20 mA active; bulk decoupling prevents supply droop during Flash program/erase. Keep analog VREF+ (RA3) and VREF- (RA2) traces short and bypass them with 0.1 uF capacitors if used in ADC mode.
Route the crystal traces (OSC1/RA7 pin 8 and OSC2/RA6 pin 9) as short, symmetric differential pairs with a ground guard ring; keep them away from switching signals and the ICSP lines (RB6/PGC pin 18, RB7/PGD pin 19). When using the internal oscillator, leave OSC1/OSC2 as GPIO (RA6/RA7) but still bypass them with 0.1 uF to VDD if unused. Provide a 10 kohm pull-up on MCLR/VPP (pin 1) to VDD to avoid spurious resets.
Do not exceed 5.5 V on any pin including MCLR; the part is 5 V-only and has no 3.3 V tolerance without level translation. Configuration bits (CONFIG1H/2L/3H/4L registers) must be programmed before Flash programming or the part may not boot - refer to the datasheet Section 25 (CPU Features) for defaults. The BOR (brown-out reset) and PWRT (power-up timer) should remain enabled for industrial deployments. Watchdog Timer postscaler must be cleared in firmware or unexpected resets will occur.
Compliance Information
RoHS and REACH compliant per Microchip product page; lead-free and halogen-free. Not AEC-Q100 qualified - PIC18F2620-E/SO is general industrial grade; for AEC-Q100 qualified parts use PIC18F46K22 family.
