PIC18LF6620-I/PT - 8-bit MCU 25MHz 64KB Flash 64-TQFP | Microchip
MPN: PIC18LF6620-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.02 | $18.02 |
| 10 | $16.4 | $164.00 |
| 100 | $14.1 | $1,410.00 |
| 500 | $12.3 | $6,150.00 |
| 1,000 | $10.85 | $10,850.00 |
PIC18LF6620-I/PT 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, ADC, communication interfaces, and GPIO. Within the broader semiconductor taxonomy, 8-bit MCUs occupy the position of low-power, deterministic, easy-to-program devices used where 32-bit performance is unnecessary but reliability, cost, and code simplicity matter. The PIC18 family is one of Microchip's highest-performance 8-bit lines, employing an enhanced Harvard RISC architecture with hardware multiplier and 16-bit instruction width.
Key features include 64 KB self-programmable Flash with 1024-byte single-word erase blocks, 3840 bytes of SRAM, an integrated 10-bit A/D converter with up to 12 channels, multiple USART/ECAN/SPI/I2C interfaces, four timer modules, and a wide operating voltage window from 2.0V to 5.5V across the LF family. The industrial temperature grade -I covers -40C to +85C ambient operation suitable for factory, automotive interior, and outdoor cabinet environments.
The PIC18LF6620-I/PT uses a 16-bit instruction word with a two-stage instruction pipeline, achieving up to 10 MIPS throughput at 25 MHz. Its nanoWatt Technology provides sleep currents below 1 uA with multiple power-managed operating modes (PRI_RUN, SEC_RUN, RC_RUN, SLEEP, IDLE), and the on-chip ECAN controller supports CAN 2.0B active at up to 1 Mbps, which is why this device family became popular in automotive body and industrial networked control applications.
Typical applications include industrial automation controllers, automotive body and HVAC modules, networked sensors using ECAN/CAN, USB/HID bridges paired with external PHYs, motor-control front-ends for small DC/stepper drives, and consumer appliance control boards. In each case the wide VDD range, large Flash, and on-chip CAN substantially reduce BOM cost compared with using an external transceiver MCU plus discrete protocol stack.
When designing with this part, ensure the in-circuit serial programming (ICSP) pins (PGC/PGD) and the MCLR reset network are routed for accessibility and that VDD decoupling follows the datasheet's 100 nF + bulk capacitor recommendation. For low-noise analog performance, route AVSS/AVDD separately from digital VDD and use the dedicated VREF+ pin when the internal 2.5V/4.096V reference is selected.
This page synthesizes Microchip factory data, distributor stock and pricing from DigiKey/Mouser, and an alternatives table covering the broader PIC18F66 family plus pin-compatible F46 and F65 K-series options not found on a single vendor page.
Drop-in alternatives for PIC18LF6620-I/PT — 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 PIC18LF6620-I/PT (same form factor and footprint) — differing in Package, ADC, I/O Pins, Core Architecture, Data RAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF6621-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF6622-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF6680-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$12.85 / Unit
View Datasheet →PIC18LF65K40-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F6620-I/PT
✅ Drop-In✓ In Stock
$5.55 / Unit
View Datasheet →PIC18LF6525-I/PT
✅ Drop-In✓ In Stock
$6.2 / Unit
View Datasheet →PIC18LF6620-I/PT Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC (Harvard) |
| Core Size | 8-bit |
| Program Memory | 64 KB (32K x 16) Flash |
| Data RAM | 3840 bytes |
| Maximum CPU Frequency | 25 MHz (10 MIPS) |
| Operating Voltage (VDD) | 2.0 V to 5.5 V (LF family, industrial -I) |
| Operating Temperature Range | -40 C to +85 C (industrial, -I) |
| I/O Pins | 52 I/O |
| ADC | 10-bit, up to 12 input channels |
| Communication Interfaces | ECAN, 2x USART, SPI, I2C |
| Timers | 4 (Timer0/1/2/3) |
| Package | 64-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Mounting Style | SMD/SMT |
| Program Memory Type | Flash (self-programmable) |
| Number of ADC Channels | 12 |
| Data RAM Type | SRAM |
| Data Bus Width | 8 bit |
| Instruction Set Architecture | RISC, 16-bit instruction word |
| Watchdog Timer | Yes (WDT with on-chip low-power RC oscillator) |
| MSL Level | 3 (168 hours) |
| Lead Free / RoHS | Lead free / RoHS compliant |
| Series | PIC18F LF (eXtreme Low Power) |
| Sub-family | PIC18F65xx / PIC18F66xx |
| On-chip CAN | ECAN (CAN 2.0B active, up to 1 Mbps) |
PIC18LF6620-I/PT Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / VREF+ |
| Pin 6 | RA4/AN4 — PORTA bit 4 / analog input 4 |
| Pin 7 | RA5/AN5 — PORTA bit 5 / analog input 5 |
| Pin 8 | RA6 — PORTA bit 6 |
| Pin 9 | OSC1/CLKI/RA7 — Oscillator input / PORTA bit 7 |
| Pin 10 | OSC2/CLKO/RA6 — Oscillator output / PORTA bit 6 alt |
| Pin 11 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| Pin 12 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin 14 | RC3 — PORTC bit 3 |
| Pin 15 | RC4 — PORTC bit 4 |
| Pin 16 | RC5 — PORTC bit 5 |
| Pin 17 | RC6 — PORTC bit 6 |
| Pin 18 | RC7 — PORTC bit 7 |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply (2.0V-5.5V LF) |
| Pin 21 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pin 22 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 23 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Pin 24 | RB3/INT3 — PORTB bit 3 / external interrupt 3 |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5 — PORTB bit 5 |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 29 | VSS — Ground reference |
| Pin 30 | VDD — Positive supply |
| Pin 31 | AVSS — Analog ground |
| Pin 32 | AVDD — Analog positive supply |
| Pin 33 | VREF- — ADC reference low |
| Pin 34 | VREF+ — ADC reference high |
| Pin 35 | AN6 — Analog input 6 |
| Pin 36 | AN7 — Analog input 7 |
| Pin 37 | AN8 — Analog input 8 |
| Pin 38 | AN9 — Analog input 9 |
| Pin 39 | AN10 — Analog input 10 |
| Pin 40 | AN11 — Analog input 11 |
| Pin 41 | RD0 — PORTD bit 0 |
| Pin 42 | RD1 — PORTD bit 1 |
| Pin 43 | RD2 — PORTD bit 2 |
| Pin 44 | RD3 — PORTD bit 3 |
| Pin 45 | RD4 — PORTD bit 4 |
| Pin 46 | RD5 — PORTD bit 5 |
| Pin 47 | RD6 — PORTD bit 6 |
| Pin 48 | RD7 — PORTD bit 7 |
| Pin 49 | RE0 — PORTE bit 0 |
| Pin 50 | RE1 — PORTE bit 1 |
| Pin 51 | RE2 — PORTE bit 2 |
| Pin 52 | RE3 — PORTE bit 3 |
| Pin 53 | RE4 — PORTE bit 4 |
| Pin 54 | RE5 — PORTE bit 5 |
| Pin 55 | RE6 — PORTE bit 6 |
| Pin 56 | RE7 — PORTE bit 7 |
| Pin 57 | RF0 — PORTF bit 0 |
| Pin 58 | RF1 — PORTF bit 1 |
| Pin 59 | RF2 — PORTF bit 2 |
| Pin 60 | RF3 — PORTF bit 3 |
| Pin 61 | RF4 — PORTF bit 4 |
| Pin 62 | RF5 — PORTF bit 5 |
| Pin 63 | RF6 — PORTF bit 6 |
| Pin 64 | RF7 — PORTF bit 7 |
Typical Applications
PIC18LF6620-I/PT is suitable for 6 applications: Industrial CAN/CANopen Nodes, Automotive Body and HVAC Modules, USB HID Bridge and PC Peripherals, Motor Control and PWM Drives, Data Logging and Sensor Hubs, Consumer Appliance Control Boards.
Industrial CAN/CANopen Nodes
The PIC18LF6620-I/PT is purpose-built for industrial CAN networks because its integrated ECAN module implements CAN 2.0B active at up to 1 Mbps without an external protocol stack. Its 25 MHz CPU and 64 KB Flash comfortably handle CANopen or DeviceNet object dictionaries while leaving room for application code, and the 2.0V-5.5V VDD window lets the same PCB power from 24V bus via a small LDO. Place the MCU next to a 3.3V CAN transceiver such as the MCP2551; the wide 52 GPIO count gives 32+ nodes per board for digital I/O expansion.
Recommended
Automotive Body and HVAC Modules
Automotive body controllers (BCM, HVAC, instrument cluster nodes) routinely use PIC18F66-family MCUs because the ECAN peripheral maps directly to vehicle CAN buses at 500 kbps. The 64 KB Flash stores body-control firmware including LIN master stacks, seat/mirror logic, and lighting PWM; the 3840-byte SRAM is enough for CAN RX ring buffers plus LIN scheduling. Industrial -40 C to +85 C operation covers cabin and underhood peripherals; for AEC-Q100 qualified automotive builds use the PIC18LF6620-I/PT automotive equivalent (designated by the /VAO or -E suffix).
Recommended
USB HID Bridge and PC Peripherals
With its 25 MHz CPU, ample Flash, and 52 GPIO, the PIC18LF6620-I/PT acts as a USB Full-Speed HID bridge when paired with an external USB transceiver or the on-chip USART in bit-bang mode. 64 KB Flash holds HID class descriptors, report buffers, and full Microchip USB stack, while the on-chip 10-bit ADC reads up to 12 analog controls. The LF variant's 2.0V minimum VDD lets the same board draw power from USB VBUS (5V) directly through an LDO; designers move to the K40 K-series only when 64 MHz USB throughput is required.
Recommended
Motor Control and PWM Drives
The PIC18LF6620-I/PT includes four timer modules and PWM channels that can drive small brushed DC, stepper, or BLDC motor front-ends up to 25 kHz switching. Its 10 MIPS throughput closes current control loops faster than legacy 8-bit MCUs and the 64 KB Flash holds field-oriented-control (FOC) libraries or trapezoidal commutation tables. Designers pair it with gate drivers such as the MCP8024 or HIP4086; the 2.0V minimum VDD helps when the motor bus is 3.3V, while industrial temperature covers motor-cabinet deployments.
Recommended
Data Logging and Sensor Hubs
Industrial sensor modules leverage the PIC18LF6620-I/PT's 10-bit ADC with up to 12 channels to read thermocouples, RTDs, 4-20 mA loops, and digital sensors while using on-chip Flash for calibration tables. The 3840-byte SRAM buffers acquisition windows between ECAN transmissions, and the wide VDD range lets the same hardware run from a 3.6V lithium primary cell. The ECAN module ships acquired data to a master controller at 1 Mbps, replacing legacy 4-20 mA analog loops with deterministic digital telemetry.
Recommended
Consumer Appliance Control Boards
Washing machines, dishwashers, and HVAC thermostats use PIC18F66-family MCUs because 64 KB Flash holds display, button, and motor-control firmware plus a small RTOS, and the 52 GPIO drive 7-segment displays, keypads, and triac outputs. The 2.0V-5.5V VDD range lets a single design power from 3.3V logic or 5V analog front-ends without redesign. Industrial -40 C to +85 C operation covers oven, refrigerator, and outdoor HVAC installations; migration to the K40 K-series is straightforward when higher CPU performance is needed.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF6620-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF6621-I/PT | PIC18LF6622-I/PT | PIC18LF6680-I/PT | PIC18LF65K40-I/PT | PIC18F6620-I/PT | PIC18LF6525-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Program Flash | 64 KB | 64 KB | 128 KB | 64 KB | 64 KB | 64 KB | 48 KB |
| Data RAM | 3840 bytes | 4096 bytes | 3840 bytes | 3840 bytes | 1024 bytes | 3840 bytes | 3840 bytes |
| Maximum CPU Clock | 25 MHz (10 MIPS) | 25 MHz (10 MIPS) | 25 MHz (10 MIPS) | 25 MHz (10 MIPS) | 64 MHz (16 MIPS) | 25 MHz (10 MIPS) | 25 MHz (10 MIPS) |
| VDD Range | 2.0V to 5.5V (LF) | 2.0V to 5.5V (LF) | 2.0V to 5.5V (LF) | 2.0V to 5.5V (LF) | 2.0V to 5.5V (LF) | 4.2V to 5.5V (F) | 2.0V to 5.5V (LF) |
| ECAN Module | Yes (1 Mbps) | Yes (1 Mbps) | Yes (1 Mbps) | Yes (1 Mbps) | No | Yes (1 Mbps) | Yes (1 Mbps) |
| I/O Pins | 52 | 52 | 52 | 52 | 55 | 52 | 52 |
| Temperature Grade | -40 C to +85 C (industrial -I) | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +85 C (I) |
Key Differentiators
- Pin-compatible upgrade with newer K-series core (vs PIC18LF65K40-I/PT)
- Doubling Flash memory without PCB change (vs PIC18LF6622-I/PT)
- Low-power LF prefix for battery designs (vs PIC18F6620-I/PT)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of every VDD/VSS pair, and add a single 10 uF bulk tantalum or ceramic capacitor near the MCU VDD pins. For the LF variant powered from a 3.3V LDO, route the LDO output directly to the MCU's VDD pins before branching to other loads to prevent transient dips that can corrupt Flash programming during ICSP.
Estimated: the PIC18LF6620-I/PT draws about 16 mA active at 25 MHz and 5V VDD, and below 1 uA in nanoWatt sleep mode. Battery-powered designs should use Sleep mode aggressively and wake from INT0 or Timer1 overflow, keeping the ECAN module disabled until a wake-up event is required. AVSS and AVDD pins must both be connected even if the ADC is unused; floating AVSS can cause unpredictable ADC behavior on adjacent channels.
Do not leave the MCLR pin floating. Always use a 10 kohm pull-up to VDD with a 100 nF capacitor to ground for proper Power-On Reset, and ensure ICSP PGC/PGD lines are isolated from analog traces to avoid false programming events. When migrating from PIC18F to PIC18LF silicon, double-check that the VDD minimum is 2.0V and not 4.2V; the F variant will brown-out below 4.0V while the LF variant operates correctly.
Compliance Information
RoHS compliant per Microchip product page. Industrial -40 C to +85 C grade, not AEC-Q100 qualified - choose automotive-qualified PIC18LF6620 variants for underhood deployments.
