PIC18LF2220-I/SP - 8-bit 40MHz MCU 4KB Flash | Microchip
MPN: PIC18LF2220-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.18 | $2,180.00 |
PIC18LF2220-I/SP Overview
A PIC microcontroller is a compact computer-on-a-chip that integrates a CPU core, non-volatile Flash program memory, SRAM, and a rich set of peripheral modules (I/O ports, timers, A/D converter, communication interfaces) into a single IC. PIC18 microcontrollers sit in the middle of Microchip's 8-bit portfolio above the PIC16 family, offering enhanced instruction set, C-optimized architecture, prioritized interrupts, hardware multiplier, and the nanoWatt power-management feature set. The PIC18LF2220 sits at the lower-density end of the PIC18F2x20 sub-family, sharing peripherals and pinout with its siblings (PIC18F2220, PIC18F2320, PIC18F4220, PIC18F4320).
Key features of the PIC18LF2220-I/SP include the 10-bit A/D converter with up to 10 channels (depending on package), a USART with LIN support, MSSP (SPI/I2C), Capture/Compare/PWM modules, nanoWatt technology for low-power sleep modes (down to ~100 nA typical), and 25 digital I/O pins. The 28-pin SPDIP package offers 0.1 inch (2.54 mm) pin pitch, easy breadboard prototyping, and 25 mA source/sink per I/O for direct LED driving.
The PIC18LF2220 is built on an enhanced Harvard architecture with separate program and data buses plus a 16-bit wide instruction path, supporting a 77-instruction set that includes hardware multiply and literal table reads. The C-friendly MIPS architecture plus XC8 compiler support and Microchip's MPLAB X IDE ecosystem gives developers a complete firmware toolchain. The 40 MHz clock produces 10 MIPS throughput, more than sufficient for sensor-fusion, motor-control loop, and human-machine interface tasks typical of industrial and consumer products.
Typical applications include industrial sensor interface boards, low-cost consumer appliances, battery-powered measurement instruments, home automation controllers, and educational/development platforms where breadboard-friendly SPDIP and 5 V tolerance simplify integration.
When designing with this device, note that the I-grade variant limits operation to -40C to +85C, not the extended -40C to +125C of the E-grade. Pin-compatible upgrades (PIC18F2220/PIC18F2320) exist with more memory and should be considered when the application grows beyond 4 KB of Flash.
This page synthesizes distributor pricing as of 2026-09-28, drop-in package-compatible PIC18 family alternatives, and practical design notes not consolidated on the manufacturer datasheet alone.
Drop-in alternatives for PIC18LF2220-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 PIC18LF2220-I/SP (same form factor and footprint) — differing in Core Architecture, Package, Timers, Mounting Type, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF2221-I/SP
✅ Drop-In✓ In Stock
$2.78 / Unit
View Datasheet →PIC18LF2320-I/SP
✅ Drop-In✓ In Stock
$4.78 / Unit
View Datasheet →PIC18LF2220-I/SO
✅ Drop-In✓ In Stock
$2.34 / Unit
View Datasheet →PIC18F2220-I/SP
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC18F2320-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF2420-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF2220-I/SP Maximum Ratings & Electrical Characteristics
| Product Family | PIC18F |
| Core Architecture | 8-bit PIC18 (Enhanced Harvard) |
| Maximum Clock Speed | 40 MHz (10 MIPS) |
| Program Memory Type | Flash |
| Program Memory Size | 4 KB (2K x 16) |
| RAM Size | 512 bytes |
| EEPROM Size | 256 bytes |
| Supply Voltage Range (LF) | 2.0 V to 5.5 V |
| Operating Temperature Range | -40C to +85C (I-grade) |
| Number of I/O Pins | 25 |
| A/D Converter | 10-bit, up to 10 channels |
| Communication Interfaces | 1x USART (LIN-capable), 1x MSSP (SPI/I2C) |
| Timers | 4 (Timer0/Timer1/Timer2/Timer3) |
| CCP Modules | 2x Capture/Compare/PWM |
| Package | 28-pin SPDIP (0.300 inch / 7.62 mm) |
| Mounting Type | Through-Hole |
| Pin Pitch | 2.54 mm (0.1 in) |
| nanoWatt Power Management | Yes (sleep currents to ~100 nA) |
| On-Chip Debug | ICD/ICSP |
| RoHS Compliance | Compliant |
PIC18LF2220-I/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 AN2 / A/D negative reference |
| Pin 5 | RA3/AN3/VREF+ — Digital I/O RA3 / analog AN3 / A/D positive reference |
| Pin 6 | RA4/T0CKI — Digital I/O RA4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — Digital I/O RA5 / analog AN4 / SPI slave select |
| Pin 8 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock / digital I/O RA7 |
| Pin 9 | OSC2/CLKO/RA6 — Crystal oscillator output / clock 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 (2.0 V to 5.5 V) |
| Pin 20 | RB0/INT0/AN12 — Digital I/O RB0 / external interrupt 0 / analog AN12 |
| Pin 21 | RB1/INT1/AN10 — Digital I/O RB1 / external interrupt 1 / analog AN10 |
| Pin 22 | RB2/INT2/AN8 — Digital I/O RB2 / external interrupt 2 / analog AN8 |
| Pin 23 | RB3/AN9/CCP2 — Digital I/O RB3 / analog AN9 / CCP2 output (alt) |
| Pin 24 | RB4/AN11/KBI0 — Digital I/O RB4 / analog AN11 / interrupt-on-change KBI0 |
| Pin 25 | RB5/KBI1/PGM — Digital I/O RB5 / interrupt-on-change KBI1 / LVP program |
| Pin 26 | RB6/KBI2/PGC — Digital I/O RB6 / interrupt-on-change KBI2 / ICD clock |
| Pin 27 | RB7/KBI3/PGD — Digital I/O RB7 / interrupt-on-change KBI3 / ICD data |
| Pin 28 | AVSS — Analog ground reference |
Typical Applications
PIC18LF2220-I/SP is suitable for 7 applications: Industrial Sensor Interface Board, Low-Cost Consumer Appliance Controller, Battery-Powered Measurement Instrument, Home Automation Controller Node, Educational / Development Platform, Motor Control Subsystem, HMI / Display Control.
Industrial Sensor Interface Board
The PIC18LF2220-I/SP fits 24-bit industrial sensor interface boards thanks to its 10-bit A/D converter with up to 10 input channels and its 2.0 V to 5.5 V supply tolerance that directly accepts 3.3 V and 5 V analog sensor rails. The 40 MHz / 10 MIPS throughput easily handles oversampling averaging of thermocouple, RTD, and 4-20 mA current-loop signals at sub-millisecond rates, while the 25 mA source/sink I/O can directly drive status LEDs and optocoupler inputs. Its 4 KB Flash hosts the calibration curves and Modbus RTU over USART firmware, and the nanoWatt sleep modes (down to ~100 nA) let battery-backed field instruments sleep between sensor reads.
Recommended
Low-Cost Consumer Appliance Controller
In consumer appliances such as coffee machines, countertop ovens, and air purifiers, the PIC18LF2220-I/SP serves as the central control MCU thanks to its 25 mA I/O capable of driving triac/relay interfaces directly, its 2x CCP modules for PWM fan or heater control, and its 2.0-5.5 V LF range that supports both 5 V legacy boards and 3.3 V modern layouts. The 4 KB Flash is adequate for menu UI state machines and PID loops, while the 256-byte EEPROM stores user presets and calibration constants across power cycles. The 28-pin SPDIP package simplifies hand-soldered prototyping for low-volume appliance SKUs.
Recommended
Battery-Powered Measurement Instrument
The PIC18LF2220-I/SP is a strong fit for handheld or remote measurement instruments running from 2x AA or coin-cell batteries thanks to its LF 2.0-5.5 V range, nanoWatt sleep currents typically below 1 uA, and integrated 10-bit A/D for direct sensor digitisation. The MCU can wake from sleep via Timer1, sample the A/D, transmit over USART or MSSP, and return to sleep in milliseconds, drawing average current well under 100 uA and enabling 1-3 year battery life. The 28-pin SPDIP and 4 KB Flash also make it ideal for low-volume educational measurement kits.
Recommended
Home Automation Controller Node
Home automation nodes such as smart switches, blind controllers, and HVAC zone controllers benefit from the PIC18LF2220-I/SP combination of 2.0-5.5 V supply tolerance (works from rectified 5 V or 3.3 V rails), 25 mA sink capability for direct triac or relay drive, and the 40 MHz core running Modbus, KNX, or proprietary RF protocols over MSSP. The 4 KB Flash is enough for node firmware with OTA hooks via ICSP, and the 256-byte EEPROM retains user calibration and pairing keys across power cycles, while the nanoWatt sleep modes keep always-on wall nodes under 0.5 W.
Recommended
Educational / Development Platform
The PIC18LF2220-I/SP is well-suited to university microcontroller courses and maker projects thanks to its 28-pin SPDIP with 0.1 inch pitch that drops directly into breadboards, its compatibility with MPLAB X IDE and the XC8 C compiler, and its on-chip ICSP debug interface that supports Microchip PICkit programmers. The 4 KB Flash and 512-byte RAM are large enough to host typical coursework projects (PWM motor control, UART comms, I2C sensor reads) while keeping compile times short, and the LF 2.0-5.5 V range accepts USB power banks and 3.3 V regulator boards alike.
Recommended
Motor Control Subsystem
Small BLDC, stepper, and brushed DC motor subsystems use the PIC18LF2220-I/SP as the supervisory and PWM controller thanks to its 2x CCP modules generating complementary PWM up to 40 MHz, its 25 mA I/O driving logic-level FET gate drivers directly, and its 10-bit A/D sampling back-EMF and current-sense feedback in real time. The 2.0-5.5 V LF range supports both 3.3 V MCU boards and 5 V legacy drivers, while the 40 MHz / 10 MIPS throughput executes field-oriented control or trapezoidal commutation loops comfortably with margin for UART diagnostics.
Recommended
HMI / Display Control
The PIC18LF2220-I/SP serves as the host controller for small character-LCD and LED-matrix human-machine interfaces thanks to its MSSP (SPI/I2C) bus driving common LCD and dot-matrix modules, its 25 mA I/O that sources segment LEDs and keypad scan lines directly, and its 40 MHz throughput updating displays without visible flicker. The 4 KB Flash supports multi-language menu trees, while the 256-byte EEPROM saves user preferences and calibration constants, and the LF 2.0-5.5 V range lets the same firmware run on 3.3 V or 5 V backplane boards.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF2220-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF2221-I/SP | PIC18LF2320-I/SP | PIC18LF2220-I/SO | PIC18F2220-I/SP |
|---|---|---|---|---|---|
| Package | 28-pin SPDIP (through-hole) | 28-pin SPDIP (same) | 28-pin SPDIP (same) | 28-pin SOIC (surface mount) | 28-pin SPDIP (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 4 KB | 8 KB | 8 KB | 4 KB | 4 KB |
| RAM | 512 B | 512 B | 512 B | 512 B | 512 B |
| Supply Voltage Range | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (F) |
| Max Clock Speed | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| I/O Pins | 25 | 25 | 25 | 25 | 25 |
| A/D Converter | 10-bit, 10 ch | 10-bit, 10 ch | 10-bit, 10 ch | 10-bit, 10 ch | 10-bit, 10 ch |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| Pricing (qty 1, USD) | $3.42 | approx $3.85 | approx $4.10 | approx $3.20 | approx $3.55 |
Key Differentiators
- LF variant supports 3.3 V single-rail operation (vs PIC18F2220-I/SP)
- Drop-in Flash upgrade path within same package (vs PIC18LF2221-I/SP)
- Breadboard-friendly through-hole package (vs PIC18LF2220-I/SO)
- Integrated 10-bit A/D with up to 10 analog inputs (vs PIC18F2220-I/SP)
Design Notes
The PIC18LF2220-I/SP draws roughly 1-10 mA active at 40 MHz depending on VDD and peripheral use, and below 1 uA in sleep with nanoWatt modes enabled. For battery designs, configure Timer1 with a 32.768 kHz crystal and use the Watchdog Timer in non-windowed mode to wake from sleep periodically. Place a 100 nF decoupling capacitor within 5 mm of VDD and a bulk 10 uF tantalum or ceramic at the PCB power entry to suppress digital switching noise on the analog AVSS/VDD rails.
On the 28-pin SPDIP, route the crystal traces (OSC1/OSC2) as short as possible, surround them with a ground pour, and keep them away from the A/D analog pins (AN0-AN4) and high-current I/O switching lines. Provide a separate analog ground island connected to AVSS and tied to digital ground at a single point near the MCU. Keep MCLR trace short and place the MCLR pull-up (typically 10 kOhm) close to the pin; do not share the MCLR pin with high-speed switching signals.
Do not confuse the PIC18LF2220-I/SP (2.0-5.5 V LF) with the PIC18F2220-I/SP (4.2-5.5 V F) when designing 3.3 V systems - the F variant will not start at 3.3 V. Always set the CONFIG1H oscillator configuration bits correctly for your external crystal versus internal RC oscillator to avoid lock-up. When migrating code to PIC18LF2221/2320, recompile for the new Flash size and verify interrupt vector remapping per the PIC18F family reference manual. Pin 1 MCLR must NOT be left floating - use a 10 kOhm pull-up to VDD or rely on the internal weak pull-up only after enabling it in firmware.
For reliable ICSP programming and in-circuit debugging, keep PGC (RB6) and PGD (RB7) accessible and avoid series resistors above 100 ohm in those traces. If long traces are unavoidable, use 4.7 kOhm pull-ups on PGC and PGD to maintain signal integrity. Reserve the ICSP connector footprint even in production boards - field firmware updates often justify keeping the programming header.
Compliance Information
RoHS and REACH compliant per Microchip product page; lead-free SPDIP package; PIC18LF2220-I/SP is not AEC-Q100 qualified - consider PIC18F2220-I/SP automotive-grade variant (Q suffix not present in -I/SP, automotive parts use -E/SP or -Q prefix) for vehicle applications.
