PIC18F1220-I/P - 8-bit 40MHz 4KB Flash MCU | Microchip DIP-18
MPN: PIC18F1220-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.07 | $5.07 |
| 10 | $4.55 | $45.50 |
| 100 | $3.78 | $378.00 |
| 500 | $3.32 | $1,660.00 |
| 1,000 | $2.95 | $2,950.00 |
PIC18F1220-I/P Overview
A PIC microcontroller is a compact programmable computing device built around a Harvard-architecture RISC core with on-chip Flash, RAM and peripherals; it sits in the broader hierarchy of microcontroller -> embedded computing subsystem -> semiconductor IC. The PIC18 family specifically targets higher-performance 8-bit applications where code density, deterministic timing and rich peripherals matter more than raw CPU frequency.
Differentiating features include seven 10-bit ADC channels for mixed-signal sensing, AUSART for asynchronous serial communications, configurable CCP modules for PWM and timing, an internal oscillator that often eliminates the external crystal, and 16 general-purpose I/O pins. Self-programming allows field firmware upgrades, while the ICD interface supports real-time debug without removing the part from the board.
The architecture uses a 16-bit instruction word with an 8-bit data path, an 8 × 8 hardware multiplier and a hardware stack that simplifies interrupt handling. The 40 MHz internal clock (10 MHz instruction rate with the 4-F cycle) delivers approximately 10 MIPS of throughput, while nanoWatt modes cut quiescent current below microamp levels for sleep-heavy applications.
Typical uses include small motor control, sensor front-ends, automotive body electronics, hobby robotics, white-goods user interfaces, low-cost consumer appliances and industrial sensor nodes where the DIP-18 footprint simplifies prototyping. The wide operating temperature range suits outdoor and industrial deployments.
When designing with the PIC18F1220-I/P, plan decoupling with a 100 nF ceramic plus bulk capacitor near VDD, reserve an unused port bit for ICD or programming, and respect the 5.5 V absolute-maximum VDD to avoid latch-up during hot-plug events.
This page combines distributor pricing, drop-in same-package alternatives and practical engineering notes that go beyond the manufacturer datasheet alone to accelerate part selection and BOM risk reduction.
Drop-in alternatives for PIC18F1220-I/P — 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 PIC18F1220-I/P (same form factor and footprint) — differing in ADC, Communication, Package, EEPROM, In-Circuit Debug.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F1320-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F1220-E/P
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →PIC18F1220-I/P Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit RISC |
| Program Memory (Flash) | 4 KB (2K x 16) |
| RAM | 256 bytes |
| EEPROM | 128 bytes |
| Maximum CPU Frequency | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 16 |
| ADC | 10-bit, up to 7 channels |
| Timers | Timer0, Timer1, Timer2, WDT |
| Capture/Compare/PWM | Yes (CCP) |
| Communication | AUSART |
| Oscillator | Internal (also supports external crystal) |
| Self-Programming | Yes (Flash) |
| In-Circuit Debug | Yes (ICD) |
| Package | 18-pin PDIP (0.300 in / 7.62 mm) |
| Mounting Type | Through-Hole |
| Operating Temperature | -40C to +85C (Industrial) |
| RoHS Status | Compliant (Pb-free) |
| MSL Level | 1 (not moisture sensitive) |
PIC18F1220-I/P Pin Configuration
| Pin 1 | RA2/AN2 — Digital I/O / Analog input channel 2 |
| Pin 2 | RA3/AN3 — Digital I/O / Analog input channel 3 / VREF+ |
| Pin 3 | RA4/AN4 — Digital I/O / Analog input channel 4 |
| Pin 4 | RA5/AN5 — Digital I/O / Analog input channel 5 / VREF- |
| Pin 5 | VSS — Ground reference |
| Pin 6 | OSC1/RA7 — External oscillator input / Digital I/O |
| Pin 7 | OSC2/RA6 — External oscillator output / Digital I/O |
| Pin 8 | MCLR/VPP — Master Clear reset (active low) / Programming voltage |
| Pin 9 | RB0/INT0 — Digital I/O / External interrupt 0 |
| Pin 10 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Pin 11 | RB2 — Digital I/O |
| Pin 12 | RB3/CCP1 — Digital I/O / Capture-Compare-PWM 1 |
| Pin 13 | RB4 — Digital I/O |
| Pin 14 | RB5/PGM — Digital I/O / Low-voltage programming |
| Pin 15 | RB6/PGC — Digital I/O / In-Circuit Debug clock |
| Pin 16 | RB7/PGD — Digital I/O / In-Circuit Debug data |
| Pin 17 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| Pin 18 | RA0/AN0 — Digital I/O / Analog input channel 0 |
Typical Applications
PIC18F1220-I/P is suitable for 6 applications: Small Motor Control (DC / Stepper), Industrial Sensor Node, Home Appliance User Interface, Hobby Robotics & Educational Kits, Automotive Body Electronics, Battery-Powered IoT Sensor.
Small Motor Control (DC / Stepper)
The PIC18F1220-I/P suits small brushed DC and unipolar stepper motor control where its 40 MHz / 10 MIPS core, hardware 8x8 multiplier and CCP modules deliver deterministic PWM up to 40 kHz. The 7-channel 10-bit ADC reads back shunt current, back-EMF and potentiometer position in real time, while the AUSART drives RS-485 feedback to a host controller. Placed on a 24 V-derived 5 V rail, the MCU regulates PWM duty, handles soft-start ramps and triggers current-limit shutdown without an extra DSP. The 18-pin PDIP footprint simplifies breadboard prototyping of motor-driver daughterboards and one-off robotics projects.
Recommended
Industrial Sensor Node
Industrial 4-20 mA loop-powered sensor nodes leverage the PIC18F1220-I/P's nanoWatt sleep modes, 10-bit ADC and Industrial -40C to +85C grade. The internal oscillator removes the external crystal on remote nodes, and the 4 KB Flash accommodates sensor-linearization tables. Placed between a 24 V loop-derived 3.3 V rail and a HART or RS-485 transceiver, the MCU performs ratiometric ADC measurements against the internal 2.5 V bandgap and wakes only for scheduled conversions, drawing <1 uA in sleep. The 18-pin PDIP remains popular for hand-soldered retrofit installations inside sensor junction boxes.
Recommended
Home Appliance User Interface
White-goods user-interface boards for washing machines, dishwashers and microwaves use the PIC18F1220-I/P to drive LED indicators, scan capacitive or membrane keypads and run small BLDC pumps. The PIC18F1220's 16 I/O pins directly connect to 7-segment displays, EEPROM-backed setting storage, and a triac-fired load via an optocoupler. With self-programming Flash, manufacturers can issue field firmware updates over the AUSART-connected service port without opening the enclosure. DIP-18 packaging survives wave-solder processes used in high-volume appliance manufacturing.
Recommended
Hobby Robotics & Educational Kits
The PIC18F1220-I/P's DIP-18 footprint is ideal for breadboard-friendly educational robotics kits, Arduino-shield clones and university microcontroller labs. The PIC18 instruction set with C-compiler support (MPLAB XC8) accelerates student coding, while the AUSART bridges to Bluetooth or XBee modules for remote-control projects. The 4 KB Flash accommodates line-following, obstacle-avoidance and PID control routines. The internal oscillator eliminates external clock crystals on low-cost kits, and ICD support enables live debugging on students' prototype boards.
Recommended
Automotive Body Electronics
Inside cabin body controllers - window regulators, mirror adjusters, ambient lighting - the PIC18F1220-I/P reads automotive switch inputs, drives small relays and PWM-dims LEDs through the CCP module. The 5 V-tolerant I/O accepts direct connection to 12 V battery via resistive dividers. Placed on a local regulator with reverse-battery protection, the MCU executes LIN slave protocol over the AUSART for body-network communication, with nanoWatt sleep limiting quiescent current below the automotive key-off budget. Extended-temperature-grade PIC18F1220-E/P is preferred for under-hood environments.
Recommended
Battery-Powered IoT Sensor
Battery-powered wireless sensor endpoints leverage the PIC18F1220-I/P's nanoWatt sleep (sub-microamp) and 2.0 V minimum VDD for 2-cell AA operation. The MCU wakes periodically, reads 10-bit ADC sensor data, transmits via AUSART-connected LoRa or sub-GHz transceiver, and returns to sleep. The 4 KB Flash accommodates sensor calibration tables and a small command shell. Placed on a 2 x AA board with boost regulator, the design achieves multi-year battery life in cold-chain monitoring, agricultural sensing and smart-metering deployments.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F1220-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F1320-I/P | PIC18F1220-E/P | PIC18F1220-I/ML |
|---|---|---|---|---|
| Package | 18-pin PDIP (0.300 in) | 18-pin PDIP - same | 18-pin PDIP - same | 28-pin QFN (ML) - different |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Program Memory | 4 KB (2K x 16) | 8 KB (4K x 16) | 4 KB (2K x 16) | 4 KB (2K x 16) |
| RAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Maximum Clock | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) |
| ADC Channels | 7 x 10-bit | 7 x 10-bit | 7 x 10-bit | 7 x 10-bit |
Key Differentiators
- Drop-in Flash upgrade without PCB rework (vs PIC18F1320-I/P)
- Extended-temperature option in the same footprint (vs PIC18F1220-E/P)
- Through-hole package simplifies prototyping and repair (vs PIC18F1220-I/ML (QFN-28))
Design Notes
Decouple VDD (pin 17) with a 100 nF X7R ceramic placed within 5 mm of the supply pin and add a 10 uF tantalum or aluminum bulk capacitor at the regulator output. The PIC18F1220-I/P draws peak transient currents during ADC conversions and CCP transitions; insufficient decoupling will cause code-fetch glitches and brown-out resets. For battery-powered designs, ensure the LDO maintains >2.0 V at all transient load steps.
Route the ICSP clock/data signals (RB6/PGC and RB7/PGD) with short, parallel traces and a ground-return path to preserve signal integrity during programming. Avoid routing these traces adjacent to high-current motor or triac outputs. Place the MCLR pull-up (typically 10 kohm) close to the pin to ensure reliable reset behavior; add a 100 nF cap to ground if the MCLR line is long or exposed to ESD.
Do not exceed 5.5 V on any pin or VDD - latch-up events can permanently damage the device. Ensure unused I/O pins are configured as outputs (low) or inputs with internal weak pull-ups enabled to minimize supply current. When migrating from PIC16F to PIC18F instruction set, recompile all code under MPLAB XC8 because the instruction encoding and interrupt-vector structure differ. Reference the PIC18F1220/1320 errata sheet for any silicon anomalies before finalizing the design.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade only - not AEC-Q100 qualified; choose automotive-qualified PIC variants if AEC-Q100 is required.
