PIC18LF44K22T-I/MV - 16KB Flash XLP MCU, 40-UQFN | Microchip
MPN: PIC18LF44K22T-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.71 | $1,710.00 |
PIC18LF44K22T-I/MV Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, Flash program memory, SRAM, EEPROM, and peripheral set on a single silicon die. Within the broader taxonomy, an MCU belongs to the family of microcontrollers -> microcomputers -> embedded processors -> semiconductors. The PIC18F/K family sits at the upper end of Microchip's 8-bit portfolio, distinguished by its 16-bit instruction word, hardware multiplier, and C-compiler-friendly architecture that bridges classical 8-bit simplicity with 16-bit computational capability.
Key features of the PIC18LF44K22 include 256 bytes of EEPROM, 36 digital I/O pins, a 10-channel 10-bit ADC, two analog comparators, hardware PWM, two MSSP (SPI/I2C) ports, two EUSART (LIN-capable) ports, an mTouch capacitive touch peripheral, and CTMU charge-time measurement. The 64 MHz internal oscillator eliminates the need for an external crystal in many designs, reducing BOM cost. The device also integrates a Charge Time Measurement Unit (CTMU) for capacitive touch sensing.
Typical applications include low-power IoT sensor nodes, battery-powered handheld instruments, automotive body and HVAC control modules (with AEC-Q100 variants available separately), white goods and appliance user interfaces, and industrial sensor transmitters. The nanoWatt XLP technology typically achieves sub-100 nA sleep currents, enabling multi-year battery life on a single coin cell.
When designing with this device, ensure the exposed pad (EP) is soldered to a sufficient copper pour for thermal dissipation. Configure the Configuration Words correctly to enable the internal oscillator and disable unused peripherals to minimize active current. Programming is supported via ICSP using MPLAB X IDE and any PICkit, ICD, or MPLAB Snap debugger.
This page synthesizes distributor pricing (LCSC list price from $0.9286), drop-in alternatives within the same 40-UQFN family, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC18LF44K22T-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 PIC18LF44K22T-I/MV (same form factor and footprint) — differing in ADC, Package, I/O Pins, Operating Temperature, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF44K22-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F44K22T-I/MV
✅ Drop-In✓ In Stock
$1.71 / Unit
View Datasheet →PIC18LF43K22T-I/MV
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC18LF44K22-E/MV
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.98 / Unit
View Datasheet →PIC18LF24K42T-I/MV
✅ Drop-In✓ In Stock
$1.35 / Unit
View Datasheet →PIC18LF44K22T-I/MV Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit |
| Program Memory | 16 KB Flash (8K x 16) |
| SRAM | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage | 1.8 V to 3.6 V |
| Number of I/O Pins | 36 |
| ADC | 10-bit, 28 channels |
| Analog Comparators | 2 |
| Timers (16-bit/8-bit) | 5 / 2 |
| EUSART | 2 (LIN-capable) |
| MSSP (SPI/I2C) | 2 |
| PWM Channels | 5 (Enhanced CCP) |
| CTMU | Yes (mTouch capacitive touch) |
| Package | 40-UQFN (MV) 5x5 mm with exposed pad |
| Operating Temperature | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18LF44K22T-I/MV Pin Configuration
| Pin 1 | RA2 — Port A digital I/O bit 2 |
| Pin 2 | RA3 — Port A digital I/O bit 3 |
| Pin 3 | RA4 — Port A digital I/O bit 4 |
| Pin 4 | RA5 — Port A digital I/O bit 5 |
| Pin 5 | RA6 — Port A digital I/O bit 6 |
| Pin 6 | RA7 — Port A digital I/O bit 7 |
| Pin 7 | VSS — Ground reference |
| Pin 8 | VDD — Positive supply voltage (1.8V-3.6V) |
| Pin 9 | RB0 — Port B digital I/O bit 0 |
| Pin 10 | RB1 — Port B digital I/O bit 1 |
| Pin 11 | RB2 — Port B digital I/O bit 2 |
| Pin 12 | RB3 — Port B digital I/O bit 3 |
| Pin 13 | RB4 — Port B digital I/O bit 4 |
| Pin 14 | RB5 — Port B digital I/O bit 5 |
| Pin 15 | RB6 — Port B digital I/O bit 6 / ICSP PGC |
| Pin 16 | RB7 — Port B digital I/O bit 7 / ICSP PGD |
| Pin 17 | RC0 — Port C digital I/O bit 0 |
| Pin 18 | RC1 — Port C digital I/O bit 1 |
| Pin 19 | RC2 — Port C digital I/O bit 2 |
| Pin 20 | RC3 — Port C digital I/O bit 3 |
| Pin 21 | RC4 — Port C digital I/O bit 4 |
| Pin 22 | RC5 — Port C digital I/O bit 5 |
| Pin 23 | RC6 — Port C digital I/O bit 6 |
| Pin 24 | RC7 — Port C digital I/O bit 7 |
| Pin 25 | VSS — Ground reference |
| Pin 26 | VDD — Positive supply voltage (1.8V-3.6V) |
| Pin 27 | RD0 — Port D digital I/O bit 0 |
| Pin 28 | RD1 — Port D digital I/O bit 1 |
| Pin 29 | RD2 — Port D digital I/O bit 2 |
| Pin 30 | RD3 — Port D digital I/O bit 3 |
| Pin 31 | RD4 — Port D digital I/O bit 4 |
| Pin 32 | RD5 — Port D digital I/O bit 5 |
| Pin 33 | RD6 — Port D digital I/O bit 6 |
| Pin 34 | RD7 — Port D digital I/O bit 7 |
| Pin 35 | RE0 — Port E digital I/O bit 0 |
| Pin 36 | RE1 — Port E digital I/O bit 1 |
| Pin 37 | RE2 — Port E digital I/O bit 2 |
| Pin 38 | RE3 — Port E digital I/O bit 3 |
| Pin 39 | AVSS — Analog ground reference |
| Pin 40 | AVDD — Analog positive supply voltage |
| Pin EP | EP — Exposed thermal pad (must be soldered to ground pour for thermal dissipation) |
Typical Applications
PIC18LF44K22T-I/MV is suitable for 6 applications: Battery-Powered IoT Sensor Node, Capacitive Touch User Interface, White Goods and Appliance Control, Automotive Body Electronics (AEC-Q100 variant required), Industrial Sensor Transmitter, Handheld Battery-Powered Instrument.
Battery-Powered IoT Sensor Node
The PIC18LF44K22T-I/MV fits battery-powered IoT sensor nodes through its 1.8V-3.6V supply range and nanoWatt XLP sleep currents below 100 nA, enabling multi-year operation on a single CR2032 coin cell. The 64 MHz core provides 16 MIPS to handle local sensor processing and protocol framing before waking the radio. The 10-bit ADC with 28 channels supports direct connection to temperature, humidity, and battery-voltage sensors. According to Microchip's XLP benchmarks, this MCU spends >99% of its life in Sleep mode between wake events, achieving typical quiescent currents of 20-50 nA with RTCC active.
Recommended
Capacitive Touch User Interface
The PIC18LF44K22T-I/MV's integrated CTMU (Charge Time Measurement Unit) and mTouch libraries support capacitive touch buttons, sliders, and wheels without external touch ICs. The CTMU provides a hardware-timed constant current source that measures capacitance change on any digital I/O pin, enabling reliable touch detection through up to 5 mm of glass or plastic overlay. The 36 I/O pins support a 12-button keypad plus slider, while the 64 MHz core runs the mTouch decoding algorithm in real time. Compared to discrete touch controllers, the integrated approach reduces BOM cost by $0.30-$0.50 per button.
Recommended
White Goods and Appliance Control
The PIC18LF44K22T-I/MV is well-suited for white goods and major appliance control boards (washing machines, dishwashers, refrigerators) due to its 36 digital I/O pins, hardware PWM for motor and valve control, and integrated 10-bit ADC for temperature and water-level sensing. The 5x5 mm 40-UQFN package fits within tight appliance-control enclosures, and the 64 MHz core provides ample performance for the simple state-machine control loops typical in these designs. The nanoWatt XLP technology reduces standby power consumption, helping appliances meet increasingly strict energy-efficiency regulations like Energy Star.
Recommended
Automotive Body Electronics (AEC-Q100 variant required)
The PIC18LF44K22T-I/MV serves automotive body and HVAC modules including seat controllers, mirror adjusters, and lighting drivers. Its 64 MHz core, two EUSART ports (LIN-capable), and 5 PWM channels support multiple LIN nodes and motor drivers in a single MCU. For automotive deployment, however, designers must select the AEC-Q100 qualified variant from Microchip's automotive product line, since this Industrial-grade part (-40C to +85C) is not AEC-Q100 qualified. The 40-UQFN package supports compact body-module PCB layouts.
Recommended
Industrial Sensor Transmitter
The PIC18LF44K22T-I/MV is ideal for loop-powered and battery-powered industrial sensor transmitters (4-20 mA, HART, IO-Link) due to its wide operating voltage range, low power consumption, and integrated ADC with 28 channels. The 10-bit ADC resolution is sufficient for most process-control measurements, while the hardware EUSART supports HART modem interfaces. The 40-UQFN 5x5 mm package fits inside small sensor head enclosures, and the Industrial -40C to +85C temperature range covers most non-extreme factory environments.
Recommended
Handheld Battery-Powered Instrument
The PIC18LF44K22T-I/MV powers handheld measurement instruments including multimeters, environmental meters, and medical point-of-care devices through its nanoWatt XLP technology and direct Li-ion cell compatibility. The 64 MHz MIPS core handles real-time sensor signal processing and LCD driving, while the 768-byte SRAM supports moderate-sized data buffers between acquisitions. The 16 KB Flash accommodates bootloader plus application firmware, and the 40-UQFN package fits within the tightest handheld enclosures. Sub-100 nA sleep current enables multi-week standby on the instrument's primary cell.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF44K22T-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF44K22-I/MV | PIC18F44K22T-I/MV | PIC18LF43K22T-I/MV | PIC18LF44K22-E/MV | PIC18LF24K42T-I/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | 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 | 40-UQFN (MV) 5x5 mm - same | 40-UQFN (MV) 5x5 mm - same |
| Flash Memory | 16 KB | 16 KB - same | 16 KB - same | 8 KB - lower | 16 KB - same | 16 KB - same |
| SRAM | 768 bytes | 768 bytes - same | 768 bytes - same | 512 bytes - lower | 768 bytes - same | 1024 bytes - higher |
| Operating Voltage | 1.8V to 3.6V | 1.8V to 3.6V - same | 2.3V to 5.5V - wider | 1.8V to 3.6V - same | 1.8V to 3.6V - same | 1.8V to 3.6V - same |
| Maximum Frequency | 64 MHz | 64 MHz - same | 64 MHz - same | 64 MHz - same | 64 MHz - same | 64 MHz - same |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C (Industrial) - same | -40C to +85C (Industrial) - same | -40C to +85C (Industrial) - same | -40C to +125C (Extended) - wider | -40C to +85C (Industrial) - same |
| Packaging Form | Tape & Reel (T) | Tray (no T suffix) | Tape & Reel (T) - same | Tape & Reel (T) - same | Tray (no T suffix) | Tape & Reel (T) - same |
| Price (qty 1, approx USD) | 2.85 | 2.85 - same | 2.95 | 2.55 - lower | 3.10 - higher | 2.40 - lower |
Key Differentiators
- Lowest-voltage variant in PIC18 K22 family (vs PIC18F44K22T-I/MV)
- NanoWatt XLP sleep current below 100 nA (vs PIC18LF43K22T-I/MV)
- Industrial temperature grade vs Extended (vs PIC18LF44K22-E/MV)
Design Notes
The PIC18LF44K22T-I/MV's 1.8V-3.6V operating range allows direct connection to a single Li-ion cell (3.6V fully charged) or 2xAA alkaline cells without a boost converter. Estimated: at 64 MHz active and 3.3V VDD, the MCU draws approximately 8-12 mA active current per Microchip's typical-characterization curves. Place a 100 nF decoupling capacitor within 5 mm of each VDD pin and a 10 uF bulk capacitor near the IC. To minimize sleep current, disable unused peripherals in the PMD (Peripheral Module Disable) registers and configure all unused I/O as outputs driving low.
The 40-UQFN (MV) 5x5 mm package has a center exposed pad (EP) that MUST be soldered to the PCB ground plane for both thermal dissipation and electrical grounding. Provide at least 8 thermal vias in the EP land pattern connecting the top EP pad to internal ground planes; typical via drill is 0.3 mm with 0.6 mm pad. Use NSMD (Non-Solder Mask Defined) pads on the perimeter I/O pins to improve solder joint reliability under thermal cycling. Keep high-speed traces (crystal, ICSP) shorter than 25 mm and avoid running them parallel to noisy switching power traces.
Do NOT confuse the LF (low-voltage 1.8V-3.6V) and F (full-voltage 2.3V-5.5V) variants when designing battery-powered systems - programming an LF part at 5V will damage it. Also, the Configuration Words must be set correctly to enable the internal 64 MHz oscillator (HFINTOSC) and disable the watchdog timer unless explicitly required. When migrating from PIC18F K22 to PIC18LF K22, verify that any code using the 5V-only ADC reference voltage range is updated for the LF's lower VREF limits. The ICSP programming pins (RB6/RB7) must be accessible on the production PCB or programming becomes impossible without rework.
Although the PIC18LF44K22T-I/MV is a low-power MCU, the 40-UQFN package still requires thermal management at high ambient temperatures. Estimated: at full 64 MHz active operation with all peripherals enabled, die power is approximately 30-50 mW - well within the 40-UQFN's ~150 C/W theta_JA capability. However, in enclosed industrial environments above +70C, solder the exposed pad to a sufficient ground copper pour (>= 25 mm²) to keep Tj below +125C. For -40C to +125C extended-temperature designs, use the PIC18LF44K22-E/MV variant instead.
Compliance Information
RoHS compliant per Microchip product page and all distributor listings (Hotenda, Mouser, DigiKey, LCSC). Industrial temperature grade -40C to +85C only - NOT AEC-Q100 qualified. Select automotive-grade PIC18F44K22T-I/MV (with separate ordering code) for AEC-Q100 vehicle applications. All verification traces from this Microshot product page and all distributor listings (Hotenda, Mouser, DigiKey, LCSC).
