PIC18F44K22-E/P - 8-bit 48MHz MCU, 16KB Flash, 40-PDIP | Microchip
MPN: PIC18F44K22-E/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.15 | $315.00 |
| 500 | $2.65 | $1,325.00 |
| 1,000 | $2.32 | $2,320.00 |
PIC18F44K22-E/P Overview
An 8-bit microcontroller (MCU) is a single-chip computer optimized for embedded control tasks with an 8-bit data path, on-chip Flash, RAM, peripherals, and a CPU core in one package. The PIC18F family belongs to the broader PIC® microcontroller hierarchy (PIC10/12/16 -> PIC18 -> PIC24/dsPIC) within Microchip's 8-/16-bit MCU portfolio and is widely used in motor control, sensor interfacing, and human-machine interface subsystems. The XLP (eXtreme Low Power) family adds nanoWatt sleep modes that draw sub-microamp currents, extending battery life in always-on applications.
Key features of the PIC18F44K22 include integrated peripherals: a 10-bit ADC with up to 28 channels, multiple Enhanced USART, MSSP (SPI/I2C), PWM modules, comparators, and CTMU charge-time measurement. The device supports self-programming, dual watchdogs, and a wide industrial temperature grade, all while running on the familiar PIC18 instruction set. The 64 MHz internal oscillator and 4x PLL allow flexible clocking options without external crystals.
Architecturally, the PIC18F44K22 uses an enhanced Harvard RISC core with a hardware multiplier and 16-bit instructions, achieving 8 MIPS at 48 MHz while maintaining code compatibility with the PIC18 family. The internal voltage regulator and wide Vdd tolerance simplify 5V system design, and the nanoWatt XLP modes (sleep, deep sleep, RTCC from LPRC) enable 100 nA-class standby currents ideal for battery-powered sensor nodes.
Typical applications include industrial control panels, home appliances, low-power IoT sensor nodes, automotive body electronics, USB device peripherals, and general-purpose embedded control. The 36 I/O lines and rich peripheral set also make it suitable for human-interface boards with LCDs, keypads, and rotary encoders.
Design tip: place a 100 nF decoupling capacitor close to each Vdd/Vss pair and a 10 µF bulk capacitor on the main supply rail. Verify the MCLR pin is pulled high through a 10 kΩ resistor for reliable reset, and reserve a 4.7 kΩ I2C pull-up pair if you plan to use the MSSP peripheral.
This page synthesizes distributor pricing, drop-in alternatives, and practical engineering guidance that complements - but does not replace - the manufacturer datasheet.
Drop-in alternatives for PIC18F44K22-E/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-E/P (same form factor and footprint) — differing in Package, Core, Operating Temperature, Program Memory (Flash), ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F44K22-I/P
✅ Drop-In✓ In Stock
$1.36 / Unit
View Datasheet →PIC18F45K22-I/P
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC18F43K22-E/PT
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC18F4423-E/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.68 / Unit
View Datasheet →PIC18F4420-E/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.55 / Unit
View Datasheet →PIC18F44K22-E/P Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit RISC |
| Instruction Set Width | 16-bit (8-bit data path) |
| Max CPU Speed | 48 MHz (8 MIPS) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| RAM | 768 bytes |
| EEPROM | 256 bytes |
| Supply Voltage (Vdd) | 4.2 V to 5.5 V |
| I/O Pins | 36 |
| Package Type | 40-pin PDIP (Plastic DIP, 0.600 in) |
| Operating Temperature Range (E suffix) | -40 C to +125 C (extended) |
| Mounting Type | Through-Hole |
| Low-Power Mode | nanoWatt XLP |
PIC18F44K22-E/P Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, internal pull-up enabled by configuration |
| Pin 2 | RA0 — Digital I/O / analog input AN0 |
| Pin 3 | RA1 — Digital I/O / analog input AN1 |
| Pin 4 | RA2 — Digital I/O / analog input AN2 |
| Pin 5 | RA3 — Digital I/O / analog input AN3 / Vref+ |
| Pin 6 | RA4 — Digital I/O / analog input AN4 |
| Pin 7 | RA5 — Digital I/O / analog input AN5 / Vref- |
| Pin 8 | RA6 — Digital I/O / oscillator OSC2 |
| Pin 9 | RA7 — Digital I/O / oscillator OSC1 |
| Pin 10 | Vss — Ground reference |
| Pin 11 | Vdd — Positive supply (4.2V to 5.5V) |
| Pin 12 | RB0 — Digital I/O / interrupt-on-change |
| Pin 13 | RB1 — Digital I/O / interrupt-on-change |
| Pin 14 | RB2 — Digital I/O / interrupt-on-change |
| Pin 15 | RB3 — Digital I/O / interrupt-on-change |
| Pin 16 | RB4 — Digital I/O / interrupt-on-change |
| Pin 17 | RB5 — Digital I/O / interrupt-on-change |
| Pin 18 | RB6 — Digital I/O / interrupt-on-change / ICSP clock |
| Pin 19 | RB7 — Digital I/O / interrupt-on-change / ICSP data |
| Pin 20 | Vss — Ground reference |
| Pin 21 | Vdd — Positive supply (4.2V to 5.5V) |
| Pin 22 | RC0 — Digital I/O |
| Pin 23 | RC1 — Digital I/O |
| Pin 24 | RC2 — Digital I/O |
| Pin 25 | RC3 — Digital I/O |
| Pin 26 | RC4 — Digital I/O |
| Pin 27 | RC5 — Digital I/O |
| Pin 28 | RC6 — Digital I/O / EUSART TX |
| Pin 29 | RC7 — Digital I/O / EUSART RX |
| Pin 30 | Vss — Ground reference |
| Pin 31 | Vdd — Positive supply (4.2V to 5.5V) |
| Pin 32 | RD0 — Digital I/O |
| Pin 33 | RD1 — Digital I/O |
| Pin 34 | RD2 — Digital I/O |
| Pin 35 | RD3 — Digital I/O |
| Pin 36 | RD4 — Digital I/O |
| Pin 37 | RD5 — Digital I/O |
| Pin 38 | RD6 — Digital I/O |
| Pin 39 | RD7 — Digital I/O |
| Pin 40 | RE3 — Digital I/O (input-only on some PIC18F variants) |
Typical Applications
PIC18F44K22-E/P is suitable for 6 applications: Industrial Control Panels, Battery-Powered Sensor Nodes, Home Appliance Control Boards, Automotive Body Electronics, USB Device Peripherals (with companion IC), Human-Machine Interface Boards (HMI).
Industrial Control Panels
The PIC18F44K22-E/P is well suited to industrial control panels where its 36 digital I/O lines drive multiplexed LED indicators, key matrices, and discrete relay outputs. The 16KB Flash comfortably hosts a state-machine plus keypad/HMI logic, while the 10-bit ADC reads analog sensor inputs (temperature, pressure, current). Wide -40 C to +125 C temperature operation tolerates factory-floor thermal swings, and the 4.2V-5.5V Vdd range matches 5V industrial backplanes. The nanoWatt XLP idle mode (~100 nA typical) lets the panel sit in standby between operator actions.
Recommended
Battery-Powered Sensor Nodes
The PIC18F44K22-E/P's nanoWatt XLP technology (sub-uA sleep currents) makes it ideal for battery-powered wireless sensor nodes that wake briefly to take a sensor reading and return to deep sleep. Its 4.2V-5.5V supply range supports a single 3.6V Li-SOCl2 cell plus boost, or directly a 3x AA alkaline stack. The 10-bit ADC reads temperature/humidity/battery-voltage sensors, while the MSSP peripheral drives a low-power RF module such as the MRF89XA sub-GHz transceiver. Built-in EEPROM stores calibration constants without external memory.
Recommended
Home Appliance Control Boards
White-goods and kitchen appliances commonly use the PIC18F44K22-E/P to coordinate motor drivers, user keypads, LCDs, and safety sensors. The 8 MIPS throughput is sufficient for fuzzy-logic temperature control and brushless-DC commutation timing. 36 I/O lines are enough to drive a 7-segment display plus indicator LEDs without external latches. The 256-byte EEPROM stores user-setpoint preferences and counters. Extended -40 C to +125 C temperature rating supports the thermal environment inside an oven, dishwasher, or refrigerator compressor bay.
Recommended
Automotive Body Electronics
In automotive body modules (mirror controllers, seat-position memories, HVAC blend doors), the PIC18F44K22-E/P provides 36 I/O lines, 10-bit ADC for potentiometer feedback, and the PWM modules needed for brushed-motor drive. The -40 C to +125 C extended temperature range and 5V Vdd tolerance survive under-hood thermal stress. EUSART/MSSP interfaces connect to LIN or CAN companion ICs. NOTE: this part is not AEC-Q100 qualified - automotive designs should select the AEC-Q100-validated PIC18F variants in the same family.
Recommended
USB Device Peripherals (with companion IC)
The PIC18F44K22-E/P can act as the host controller for low-speed USB peripherals by pairing with an external USB transceiver such as the MCP2200 or by bit-banging low-speed USB via software on the MSSP/USART pins. The 16KB Flash accommodates USB stack plus class firmware (HID, CDC), and the 10-bit ADC captures analog signals from the device side. 4.2V-5.5V Vdd matches USB-powered 5V rails directly. Compared to a 32KB Flash part, the 16KB device fits HID-class devices, custom vendor-class devices, and basic CDC bridges.
Recommended
Human-Machine Interface Boards (HMI)
The PIC18F44K22-E/P is a strong fit for HMI boards driving character LCDs, capacitive-touch key matrices, and rotary encoders because of its generous 36 I/O budget and dual hardware UARTs. One UART can drive a serial TFT/NHD display while the second talks to a sensor daughterboard. The 10-bit ADC scans resistive touch overlays, and the PWM outputs control LCD backlight dimming. The 256-byte EEPROM stores menu favorites. nanoWatt XLP sleep currents under 1 µA allow battery-backed operation when the mains drops.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F44K22-E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F44K22-I/P | PIC18F45K22-I/P | PIC18F43K22-E/P | PIC18F4423-E/P | PIC18F4420-E/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-40 | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same |
| Core | PIC18 8-bit, 48 MHz / 8 MIPS | PIC18 8-bit, 48 MHz / 8 MIPS - same | PIC18 8-bit, 48 MHz / 8 MIPS - same | PIC18 8-bit, 48 MHz / 8 MIPS - same | PIC18 8-bit, 40 MHz / 10 MIPS - older | PIC18 8-bit, 40 MHz / 10 MIPS - older |
| Flash | 16 KB | 16 KB - same | 32 KB (+100%) | 8 KB (-50%) | 16 KB - same | 16 KB - same |
| RAM | 768 B | 768 B - same | 1.5 KB (~+100%) | 512 B (-33%) | 768 B - same | 768 B - same |
| EEPROM | 256 B | 256 B - same | 256 B - same | 256 B - same | 256 B - same | 256 B - same |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same | 4.2 V to 5.5 V - same |
| Temperature Range | -40 C to +125 C (E) | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +125 C (E) - same | -40 C to +125 C (E) - same | -40 C to +125 C (E) - same |
| nanoWatt XLP | Yes | Yes - same | Yes - same | Yes - same | No (legacy sleep) | No (legacy sleep) |
Key Differentiators
- Smaller memory but lower cost vs PIC18F45K22-I/P (vs PIC18F45K22-I/P)
- More memory and RAM than PIC18F43K22-E/P (vs PIC18F43K22-E/P)
- nanoWatt XLP advantage over legacy PIC18F4423-E/P (vs PIC18F4423-E/P)
Design Notes
Place a 100 nF decoupling capacitor within 5 mm of each Vdd pin (pin 11, 21, 31 on the 40-pin PDIP) and a single 10 µF bulk capacitor near the Vdd entry point. The PIC18F44K22-E/P draws up to ~15 mA at full 48 MHz CPU activity, so a low-ESR tantalum or ceramic bulk capacitor is recommended. Add a ferrite bead in series with Vdd if the supply comes from a switching regulator to limit injected noise into the analog ADC rails.
The MCLR pin must be pulled high through a 10 kΩ resistor for normal operation. Floating MCLR causes intermittent resets, especially during ICSP programming. According to the datasheet, the on-chip MCLR pull-up can be disabled in configuration bits, so verify CONFIG3H before relying on the internal resistor. Also confirm that the CONFIG1H oscillator settings match the HFINTOSC, EC, or XT crystal selection, otherwise the device will not boot.
Estimated: at 48 MHz full activity the PIC18F44K22-E/P draws ~15 mA from a 5.0 V supply, dissipating 75 mW. The 40-pin PDIP has theta_JA of approximately 50 C/W in still air, yielding a junction rise of only 3-4 C above ambient - well within the -40 C to +125 C operating envelope. Even at the extended 125 C ambient the junction stays safely below 130 C, so no heatsink is required. Always cross-check the actual power budget against the chosen clock speed and peripheral activation matrix.
Route ICSP signals (RB6/ICPCK and RB7/ICPDAT) with a short, direct path to a 6-pin header placed at the board edge - keeping the header out from under tall components. Avoid running analog AN0-AN13 traces parallel to digital lines to minimize ADC crosstalk. For the EUSART, place the matching crystal or oscillator close to OSC1/OSC2 (RA7/RA6) with a ground guard ring, and keep trace lengths matched within 2 mm for reliable serial communication at higher baud rates.
Compliance Information
RoHS/REACH compliance not explicitly stated in the provided data and is marked [DATA_NEEDED]. This part is not AEC-Q100 qualified; automotive designs should select the AEC-Q100-validated variant. Conflict-minerals status is marked unknown because the manufacturer declaration was not in the verified web data.
