PIC18F44K22-I/P - 8-bit 64MHz XLP MCU 16KB Flash 40-PDIP | Microchip
MPN: PIC18F44K22-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.07 | $2.07 |
| 10 | $1.86 | $18.60 |
| 100 | $1.66 | $166.00 |
| 500 | $1.49 | $745.00 |
| 1,000 | $1.36 | $1,360.00 |
PIC18F44K22-I/P Overview
A PIC18 microcontroller is an 8-bit Harvard-architecture MCU built around a RISC core with hardware accumulator, hardware multiply, and a peripheral set optimized for low-power mixed-signal embedded designs. PIC18 sits at the top of Microchip's 8-bit PIC portfolio and shares a common instruction set across 28/40/44-pin packages, enabling firmware portability within the family. Within the power-management IC hierarchy it belongs to the broader "microcontroller -> MCU -> embedded controller -> semiconductor" taxonomy.
Key features include 16KB self-programmable Flash, hardware CCP/ECCP modules, multiple Enhanced USART, SPI, I2C interfaces, a 10-bit ADC with up to 28 input channels, mTouch capacitive touch peripherals, nanoWatt XLP sleep currents as low as 20 nA, and 5 CCP PWM channels for motor and lighting control. The -I/P suffix denotes the industrial temperature grade (-40C to +85C) and PDIP-40 package.
The architecture combines an 8-bit data path with a 16-bit instruction word, an 8-level hardware stack, and C-optimized architecture, which simplifies compiler output while preserving deterministic interrupt response. The peripheral set (ADC, comparators, CTMU, mTouch, EUSART, MSSP, ECCP) supports sensing, communication, and actuation without external logic.
Typical applications include low-power sensor nodes, home-automation appliances, industrial control panels, capacitive touch user interfaces, motor control, and USB/serial bridging in cost-sensitive embedded designs.
When designing with this MCU, leave headroom on Vdd for ADC accuracy and add a 100 nF decoupling cap adjacent to every supply pin. For firmware migration to newer families, validate the SFR map because newer Q-series parts reorganize peripheral registers.
Drop-in alternatives for PIC18F44K22-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 PIC18F44K22-I/P (same form factor and footprint) — differing in ADC, Package, Core, Timers, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F45K22-I/P
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$2.1 / Unit
View Datasheet →PIC18F43K22-I/PT
✅ Drop-In✓ In Stock
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View Datasheet →PIC18F44K22-E/P
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$2.32 / Unit
View Datasheet →PIC18F442-I/P
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View Datasheet →PIC18F4410-I/P
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View Datasheet →PIC18F44K22-I/P Maximum Ratings & Electrical Characteristics
| Family | PIC18F K22 |
| Core | 8-bit PIC18 Harvard RISC |
| Program Memory | 16 KB Flash |
| RAM | 768 bytes |
| EEPROM | 256 bytes |
| Max CPU Frequency | 64 MHz (16 MIPS) |
| Supply Voltage | 2.3 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit, up to 28 channels |
| Package | 40-pin PDIP (0.600") |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Through-Hole |
| ROM Type | Flash |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
PIC18F44K22-I/P Pin Configuration
| Pin 1 | MCLR/RE3 — Master Clear (reset) input / digital I/O pin RE3 |
| Pin 2 | RA0/AN0 — PORTA bit 0 / ADC input AN0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / ADC input AN1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / ADC input AN2 |
| Pin 5 | RA3/AN3 — PORTA bit 3 / ADC input AN3 |
| Pin 6 | RA4 — PORTA bit 4 |
| Pin 7 | RA5/AN4 — PORTA bit 5 / ADC input AN4 |
| Pin 8 | RE0/AN5 — PORTE bit 0 / ADC input AN5 |
| Pin 9 | RE1/AN6 — PORTE bit 1 / ADC input AN6 |
| Pin 10 | RE2/AN7 — PORTE bit 2 / ADC input AN7 |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKI — Crystal oscillator input or external clock |
| Pin 14 | OSC2/CLKO — Crystal oscillator output or clock out |
| Pin 15 | RC0/SOSO — PORTC bit 0 / SOSC secondary oscillator output |
| Pin 16 | RC1/SOSI — PORTC bit 1 / SOSC secondary oscillator input |
| Pin 17 | RC2 — PORTC bit 2 |
| Pin 18 | RC3 — PORTC bit 3 |
| Pin 19 | RD0 — PORTD bit 0 |
| Pin 20 | RD1 — PORTD bit 1 |
| Pin 21 | RD2 — PORTD bit 2 |
| Pin 22 | RD3 — PORTD bit 3 |
| Pin 23 | RC4 — PORTC bit 4 |
| Pin 24 | RC5 — PORTC bit 5 |
| Pin 25 | RC6 — PORTC bit 6 |
| Pin 26 | RC7 — PORTC bit 7 |
| Pin 27 | RD4 — PORTD bit 4 |
| Pin 28 | RD5/CCP1 — PORTD bit 5 / Capture/Compare/PWM 1 |
| Pin 29 | RD6/CCP2 — PORTD bit 6 / Capture/Compare/PWM 2 |
| Pin 30 | RD7/CCP3 — PORTD bit 7 / Capture/Compare/PWM 3 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RB0 — PORTB bit 0 / interrupt-on-change |
| Pin 34 | RB1 — PORTB bit 1 / interrupt-on-change |
| Pin 35 | RB2 — PORTB bit 2 / interrupt-on-change |
| Pin 36 | RB3 — PORTB bit 3 / interrupt-on-change |
| Pin 37 | RB4 — PORTB bit 4 / interrupt-on-change |
| Pin 38 | RB5 — PORTB bit 5 / interrupt-on-change |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC18F44K22-I/P is suitable for 7 applications: Low-Power Sensor Nodes, Home Appliance Control, Industrial Control Panels, Capacitive Touch User Interfaces, Motor Control and PWM Drive, USB/Serial Bridging, Automotive Body Electronics.
Low-Power Sensor Nodes
The PIC18F44K22-I/P's nanoWatt XLP sleep current and 2.3V-5.5V supply range make it a strong fit for battery-driven sensor nodes such as wireless thermostats, utility meters, and environmental monitors. At 64 MHz / 16 MIPS the device can service sensor reads and transmit bursts within tight active windows, while pulling micro-amps during sleep to extend coin-cell life into the multi-year range. The 28-channel 10-bit ADC is sufficient for multi-element sensor front-ends.
Recommended
Home Appliance Control
The PIC18F44K22-I/P serves as the main controller for white-goods appliances (washing machines, dishwashers, induction cookers) where it sequences motors, reads user panels, and drives displays. The 5 ECCP PWM channels simplify BLDC and triac-based load control, while the 28-channel ADC handles NTC temperature sensing and current monitoring. Its 5V tolerance and industrial -40C to +85C grade suit harsh kitchen and laundry environments.
Recommended
Industrial Control Panels
The PIC18F44K22-I/P suits industrial HMI panels, PLC expansion modules, and process-control front-ends where deterministic 8-bit performance and an extensive peripheral set are needed without the cost of a Cortex-M0. Its EUSART supports RS-485 Modbus links, while the MSSP block enables SPI/I2C peripherals. The 36 I/O pins and 10-bit ADC allow direct interfacing with industrial sensors and actuator drivers.
Recommended
Capacitive Touch User Interfaces
With the integrated mTouch peripheral and CTMU charge-time measurement unit, the PIC18F44K22-I/P supports robust capacitive touch buttons, sliders, and proximity sensors without external ICs. The 64 MHz core can debounce and report touch events within 1 ms, while the XLP sleep modes keep idle touch scan power under 100 uA. This suits kitchen appliances, medical user interfaces, and consumer remote controls.
Recommended
Motor Control and PWM Drive
The PIC18F44K22-I/P's 5 Enhanced CCP modules deliver flexible PWM generation for BLDC, stepper, and triac-driven AC motors. With 16 MIPS throughput and dedicated timers, it can implement field-oriented control loops for sub-kW motors or simple V/Hz scalar control for fans and pumps. The same ADC samples back-EMF and current, simplifying hardware and BOM cost.
Recommended
USB/Serial Bridging
The PIC18F44K22-I/P, paired with its on-chip EUSART and MSSP, commonly serves as a UART-to-SPI/I2C bridge or as a CDC virtual COM port device when paired with an external USB transceiver. The 64 MHz core and 16 MIPS handle USB 2.0 full-speed interrupt and bulk transactions with low protocol overhead. This suits industrial configuration tools, IoT gateways, and legacy equipment modernization.
Recommended
Automotive Body Electronics
The PIC18F44K22-I/P's industrial temperature grade and robust peripheral set suit non-safety automotive body applications such as door modules, seat controllers, and ambient lighting. For AEC-Q100-qualified projects, the -E/P extended-temperature variant in the same 40-pin PDIP is also available. The 36 I/O pins drive LEDs, relays, and LIN slaves, while the 10-bit ADC reads sensors across the cabin.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F44K22-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F45K22-I/P | PIC18F43K22-I/P | PIC18F44K22-E/P | PIC18F442-I/P | PIC18F4410-I/P |
|---|---|---|---|---|---|---|
| Package | 40-pin PDIP (0.600") | 40-pin PDIP (0.600") - same | 40-pin PDIP (0.600") - same | 40-pin PDIP (0.600") - same | 40-pin PDIP (0.600") - same | 40-pin PDIP (0.600") - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 16 KB | 32 KB (+100%) | 8 KB (-50%) | 16 KB (same) | 16 KB (same) | 16 KB (same) |
| RAM | 768 bytes | 1024 bytes (+33%) | 512 bytes (-33%) | 768 bytes (same) | 768 bytes (same) | 768 bytes (same) |
| Max CPU Frequency | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +85C |
| Supply Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 4.2 V to 5.5 V (older spec) | 2.0 V to 5.5 V |
| I/O Pins | 36 | 36 | 36 | 36 | 36 | 36 |
Key Differentiators
- nanoWatt XLP extreme-low-power technology with sub-microamp sleep currents (vs PIC18F442-I/P)
- Higher 64 MHz / 16 MIPS throughput vs legacy F442 40 MHz / 10 MIPS (vs PIC18F442-I/P)
- Drop-in upgrade path with 32 KB Flash and 1024 B RAM (vs PIC18F43K22-I/P)
Design Notes
Place a 100 nF decoupling capacitor within 5 mm of every Vdd/Vss pin pair (pins 11/12 and 31/32 on the 40-pin PDIP). For battery applications drawing <100 uA average, also add a 10 uF bulk capacitor on the Vdd rail to absorb inrush during transmit bursts. Use a ferrite bead on Vdd if the MCU shares a rail with a noisy motor driver.
Route the crystal traces (OSC1/OSC2, pins 13/14) short and symmetric, with a ground guard ring, and keep them away from PWM edges. For mTouch capacitive sensing, dedicate adjacent ground pour and avoid nearby traces that inject noise into the CTMU charge measurement. Ensure MCLR (pin 1) has a 10 kohm pull-up and a 100 nF cap to ground for in-circuit serial programming (ICSP) robustness.
Do not assume SFR compatibility when porting PIC18F44K22 firmware to PIC18F442 - the legacy F442 family uses different peripheral register layouts and runs at 40 MHz max (10 MIPS), not 64 MHz. Always validate the configuration bits against the new part's header file before production programming. Also confirm ICD/debugger tool chain support: MPLAB X IDE with PICkit 5 is recommended for K22 family.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified; for AEC-Q100 automotive-grade applications, choose PIC18F44K22-E/P (extended temp) or migrate to a Q-series AEC-Q100 part. Industrial temp grade (-40C to +85C) per -I/P suffix.
