PIC18F44K22T-I/MV - 16KB Flash XLP 8-bit MCU 40-UQFN | Microchip
MPN: PIC18F44K22T-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.65 | $2.65 |
| 10 | $2.39 | $23.90 |
| 100 | $2.13 | $213.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.71 | $1,710.00 |
PIC18F44K22T-I/MV Overview
A PIC18 microcontroller belongs to the 8-bit microcontroller category, sitting at the base of the embedded control hierarchy alongside 16-bit, 32-bit, and ARM Cortex-based MCUs. Within Microchip's portfolio, PIC18 sits between PIC16 (baseline) and dsPIC33 (digital signal controller) families. PIC18 parts use a modified Harvard RISC architecture with 16-bit instructions, an 8-bit data path, hardware multiplier, and C-friendly instruction set, and they serve as general-purpose microcontrollers in commercial, industrial, and consumer products. PIC18F K-series parts add nanoWatt XLP low-power features and high-performance analog for battery-powered and energy-efficient designs.
Key features include 64 MHz (16 MIPS) operation from a 2.3V to 5.5V supply (typical operation extends to 5.5V), 36 programmable I/O pins, an internal 16 MHz oscillator with PLL, a 10-bit ADC with multiple input channels, two EUSART peripherals, two MSSP (SPI/I2C) peripherals, and Enhanced Capture/Compare/PWM modules. The device supports nanoWatt XLP idle/doze/sleep modes for battery-aware applications. The 40-UQFN (5x5 mm) package conserves board area while exposing the full peripheral set, including two analog comparators and a charge time measurement unit (CTMU) for capacitive touch.
Technical depth: the device contains 64 KB of addressable program space (the program image in Flash is 16 KB), 3936 B of data SRAM, 256 B of EEPROM, a 32-level hardware stack, and an in-circuit debugger interface. The on-chip debug and ICSP programming pads give design engineers a low-cost development path using Microchip's PICkit or MPLAB SNAP tools. The microcontroller is supported by MPLAB X IDE and the free XC8 C compiler, and it integrates with Microchip's code-configurator ecosystem.
Typical applications include industrial sensor signal conditioning with the ADC + CTMU, low-power battery IoT sensor nodes leveraging nanoWalt XLP sleep modes, USB HID peripherals using the MSSP/EUSART plus external transceiver, home appliance control, motor-control loops via the ECCP module, and human-interface boards with capacitive touch buttons. The wide -40C to +85C industrial temperature range makes the PIC18F44K22T-I/MV a workhorse for harsh-environment and factory-automation designs.
When designing with this device, ensure the chosen 5x5 mm UQFN footprint and adjacent decoupling lands are on a clean ground pour. Place a 100 nF decoupling capacitor as close as possible to the VDD pins, and route the ICSP clock/data lines away from switching traces to maintain debug reliability.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC18F44K22T-I/MV — 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 PIC18F44K22T-I/MV (same form factor and footprint) — differing in ADC, Core, Package, Program Memory (Flash), Communication.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F44K22-I/MV
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC18F43K22T-I/MV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F46K22T-I/MV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F44K22T-I/MV Maximum Ratings & Electrical Characteristics
| Family | PIC18F K-series |
| Core | 8-bit PIC18 (Harvard RISC) |
| Program Memory (Flash) | 16 KB |
| Data SRAM | 768 B |
| EEPROM | 256 B |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Typical Operating Voltage | 4.2 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit |
| ADC Channels | 28 |
| Package | 40-pin UQFN (5x5 mm) |
| Operating Temperature | -40C to +85C (industrial) |
| Low-Power Technology | nanoWatt XLP |
| Peripherals | 2x EUSART, 2x MSSP (SPI/I2C), ECCP, CTMU |
PIC18F44K22T-I/MV Pin Configuration
| Pin 1 | RA2/AN2/DACREF- — PORTA bit 2, analog input or DAC reference minus |
| Pin 2 | RA3/AN3/VREF+ — PORTA bit 3, analog input or positive voltage reference |
| Pin 3 | RA4/T0CKI/AN4 — PORTA bit 4, Timer0 clock input |
| Pin 4 | RA5/AN5/SS1 — PORTA bit 5, SPI1 slave select |
| Pin 5 | RE0/AN6 — PORTE bit 0, analog input |
| Pin 6 | RE1/AN7 — PORTE bit 1, analog input |
| Pin 7 | RE2/AN8 — PORTE bit 2, analog input |
| Pin 8 | RE3/MCLR/VPP — Master clear (reset), programming voltage input |
| Pin 9 | OSC1/CLKI/RA7 — Crystal oscillator input or external clock |
| Pin 10 | OSC2/CLKO/RA6 — Crystal oscillator output |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | RB7/KBI3/PGD — PORTB bit 7, ICSP data |
| Pin 14 | RB6/KBI2/PGC — PORTB bit 6, ICSP clock |
| Pin 15 | RB5/KBI1 — PORTB bit 5 |
| Pin 16 | RB4/KBI0 — PORTB bit 4 |
| Pin 17 | RB3/CCP2 — PORTB bit 3, Enhanced CCP2 |
| Pin 18 | RB2/CCP1 — PORTB bit 2, Enhanced CCP1 |
| Pin 19 | RB1/INT1 — PORTB bit 1, external interrupt 1 |
| Pin 20 | RB0/INT0/FLT0 — PORTB bit 0, external interrupt 0 |
| Pin 21 | AVDD — Analog positive supply |
| Pin 22 | AVSS — Analog ground |
| Pin 23 | RC7/AN21 — PORTC bit 7 |
| Pin 24 | RC6/AN20 — PORTC bit 6 |
| Pin 25 | RC5/AN19 — PORTC bit 5 |
| Pin 26 | RC4/AN18 — PORTC bit 4 |
| Pin 27 | RC3/SCL2 — PORTC bit 3, I2C2 clock |
| Pin 28 | RC2/SDA2 — PORTC bit 2, I2C2 data |
| Pin 29 | RC1/SOSI — PORTC bit 1, secondary oscillator input |
| Pin 30 | RC0/SOSO — PORTC bit 0, secondary oscillator output |
| Pin 31 | RD7 — PORTD bit 7 |
| Pin 32 | RD6 — PORTD bit 6 |
| Pin 33 | RD5/P1B — PORTD bit 5, PWM1 complementary |
| Pin 34 | RD4 — PORTD bit 4 |
| Pin 35 | RD3/CCP5 — PORTD bit 3, Enhanced CCP5 |
| Pin 36 | RD2/CCP4 — PORTD bit 2, Enhanced CCP4 |
| Pin 37 | RD1/CCP3 — PORTD bit 1, Enhanced CCP3 |
| Pin 38 | RD0 — PORTD bit 0 |
| Pin 39 | RA1/AN1/CTED1 — PORTA bit 1, CTMU input |
| Pin 40 | RA0/AN0/CTED0 — PORTA bit 0, CTMU input |
Typical Applications
PIC18F44K22T-I/MV is suitable for 6 applications: Industrial Sensor Signal Conditioning, Battery-Powered IoT Sensor Node, USB HID Peripheral, Home Appliance Control Board, Capacitive Touch User Interface, Motor Control Loop / Fan Driver.
Industrial Sensor Signal Conditioning
The PIC18F44K22T-I/MV is well-suited to industrial sensor signal conditioning thanks to its 10-bit ADC with up to 28 input channels, hardware CTMU for capacitance measurement, and PIC18 RISC core at 64 MHz. In a typical front-end, the MCU samples 4-20 mA loop sensors or bridge outputs, linearizes the response in firmware, and transmits scaled data over EUSART (RS-485) or MSSP (SPI/I2C). The 40-UQFN footprint saves board area inside DIN-rail modules while the 2.3-5.5 V supply accepts loop power directly. The -40C to +85C industrial rating supports factory-floor deployments without added thermal conditioning.
Recommended
Battery-Powered IoT Sensor Node
The PIC18F44K22T-I/MV is a strong fit for battery-powered IoT endpoints, leveraging Microchip's nanoWatt XLP technology to keep sleep current in the nanoampere range while retaining data SRAM. Designers typically duty-cycle the core on a 1% duty cycle, with the MCU sleeping most of the time and waking from an interrupt to take a sensor reading and transmit over a connected radio module via SPI or UART. The 64 MHz peak CPU performance handles the transmit burst in milliseconds, after which the device returns to deep sleep. A CR2032 coin cell can power such an endpoint for years, and the 5x5 mm UQFN footprint fits inside sub-1 cubic inch sensor enclosures.
Recommended
USB HID Peripheral
The PIC18F44K22T-I/MV can act as the controller for a USB HID peripheral such as a keyboard, mouse, custom interface device, or programmer tool, by pairing the on-chip MSSP (SPI) or EUSART with an external USB transceiver such as the MCP2200 or MCP2210. The 64 MHz core handles USB polling at 1 kHz and reports HID events with ample margin, while the 256 B EEPROM stores configuration and the 768 B SRAM holds the current report buffer. The 36 GPIO allow direct matrix scanning for keyboard designs. The 5x5 mm UQFN keeps consumer-facing dongles compact, and the industrial temperature range suits commercial HVAC or retail peripherals.
Recommended
Home Appliance Control Board
The PIC18F44K22T-I/MV is a common choice for home appliance control boards - washing machines, dishwashers, induction cooktops, and HVAC thermostats - because it integrates the right mix of ADC channels, PWM outputs, and communication peripherals. The Enhanced CCP module drives power-conversion FETs or motor-phase PWM at high resolution, while the 28-channel ADC scans thermistor, mains-voltage, and current-sensor inputs. Two EUSART modules let the appliance talk to the user interface and a diagnostic port at the same time. The 40-UQFN footprint fits control boards constrained for kitchen-grade enclosures, and the industrial temperature range handles inside-cabinet thermal stress.
Recommended
Capacitive Touch User Interface
The PIC18F44K22T-I/MV natively supports capacitive touch sensing through its on-chip Charge Time Measurement Unit (CTMU), which can drive and measure the slew rate of an RC network on each touch pad. Combined with the 10-bit ADC, the MCU reliably detects button presses through thin plastic overlays without a dedicated touch controller. Designers can implement sliders, wheels, and proximity sensors, with debounce and gesture recognition handled in firmware. The 5x5 mm UQFN footprint enables slim touch-key modules for appliances, lighting controllers, and consumer electronics. The nanoWatt XLP sleep mode keeps standby touch-scanning current below 5 uA.
Recommended
Motor Control Loop / Fan Driver
The PIC18F44K22T-I/MV is suitable for brushed DC, BLDC, and stepper motor control loops in low-to-mid power applications, using its Enhanced CCP PWM module for switching and ADC for back-EMF or current-sense sampling. The 64 MHz core runs the control loop comfortably at tens of kHz while leaving cycles for housekeeping, while two EUSART peripherals let the inverter talk to a higher-level supervisory processor. The 40-UQFN footprint allows compact fan-driver or BLDC module layouts. The -40C to +85C industrial range covers under-the-hood automotive accessories and industrial cabinet-cooling fans.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F44K22T-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F44K22-I/MV | PIC18F43K22T-I/MV | PIC18F46K22T-I/MV |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-UQFN (MV) 5x5 mm | 40-UQFN (MV) 5x5 mm - same | 40-UQFN (MV) 5x5 mm - same | 40-UQFN (MV) 5x5 mm - same |
| Program Memory (Flash) | 16 KB | 16 KB | 8 KB (-50%) | 64 KB (+300%) |
| Data SRAM | 768 B | 768 B | 512 B | 3862 B |
| Maximum CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Supply Voltage Range | 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 |
| I/O Pins | 36 | 36 | 36 | 36 |
| EEPROM | 256 B | 256 B | 256 B | 1024 B |
Key Differentiators
- Smallest 5x5 mm UQFN in its memory class (vs PIC18F45K22-I/PT)
- Built-in nanoWatt XLP ultra-low standby (vs PIC18F45K22-I/MV)
- Mature, broadly available 8-bit XLP MCU (vs PIC18F46K22T-I/MV)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD/AVDD pin pair and a bulk 1 uF to 10 uF near the VDD1/VUSB pins. The PIC18F44K22T-I/MV digital and analog supplies share a common power rail; route the analog AVSS trace as a star-back to the digital VSS at the regulator to keep ADC noise under the 10-bit floor (~3 mV at 3.3 V full-scale). When using nanoWatt XLP sleep modes, switch external LDO output to a MCP1700/MCP1810 low-Iq regulator so that standby current is dominated by the MCU's retention sleep, not the regulator's quiescent current.
Route ICSP PGC and PGD away from PWM and switching traces to avoid in-circuit debugger faults. The 40-UQFN (5x5 mm) thermal pad must be soldered to a continuous ground copper pour of at least 0.5 cm^2 to meet the specified thermal resistance. Reserve a clean 4.0 mm x 4.0 mm keep-out under the MCU for the crystal or internal oscillator, and avoid running signal traces directly beneath the ICSP/test pads to keep them accessible for production programming.
Do not configure the CTMU and ADC simultaneously on the same pad without sequencing - one must be disabled while the other is reading. The MCLR/RE3 pin is the only true input pin on PORTE in 40-pin UQFN; setting the CONFIGURATION bit MCLRE = OFF frees RE3 as I/O but disables the master clear reset. When using sleep mode, ensure the I/O pull-ups are configured correctly to avoid parasitic-current paths through floating I/O. Finally, MPLAB X IDE and XC8 v2.x or later are required to fully exploit the K-series instruction set and extended peripheral libraries - older MPLAB 8 tools may not optimize the device correctly.
Compliance Information
RoHS-compliant Pb-free UQFN per Microchip product page. Part is industrial-grade -40C to +85C; for automotive choose the AEC-Q100-qualified PIC18F44K22T-I/MV ESA-validated variants.
