PIC18LF14K22T-I/ML - 8-bit 64MHz XLP MCU 16KB Flash QFN-20 | Microchip
MPN: PIC18LF14K22T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.1086 | $4.11 |
| 10 | $3.9 | $39.00 |
| 100 | $3.45 | $345.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.85 | $2,850.00 |
PIC18LF14K22T-I/ML Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces into one package. Within the broader hierarchy, the PIC18LF14K22T-I/ML is an 8-bit microcontroller -> microcontroller unit (MCU) -> embedded controller -> semiconductor device. The "LF" prefix denotes the low-voltage variant (1.8-3.6 V), while the "K22" series adds nanoWatt eXtreme Low-Power (XLP) technology with deep-sleep currents below 50 nA, making it a member of Microchip's energy-efficient MCU family.
Key features include a 16 MHz internal oscillator with 4x PLL for 64 MHz operation, 16 KB Flash (8K x 16 words), 512 bytes RAM, 256 bytes EEPROM, a 10-bit ADC with 12 channels, two comparators with selectable on-chip voltage reference, 18 I/O pins, and the standard PIC18 peripheral set (CCP, EUSART, MSSP, CWG). The 20-QFN package (4x4 mm) offers a compact footprint suitable for space-constrained designs.
Architecturally, the device uses Microchip's enhanced PIC18 Harvard RISC core with a 16-bit instruction word and 8-bit data path, executed through a 2-stage pipeline. The XLP nanoWatt technology includes Sleep mode (down to ~20 nA typical), watchdog timer disable in Sleep, ultra-low-power watchdog (~500 nA), and a real-time clock calibration mode. The ADC uses a successive-approximation register (SAR) architecture, and the comparators can source/sink small currents for analog signal conditioning without external op-amps.
Typical applications include battery-powered IoT sensor nodes, low-power remote controls, portable medical devices, energy-harvesting systems, automotive body electronics, USB device peripherals (when paired with PIC18LF13K50), and small home appliances. The combination of high MIPS at low voltage and ultra-low Sleep current makes it suitable for products where battery life is critical.
When designing with the PIC18LF14K22T-I/ML, allocate the QFN thermal pad correctly with a 0.1 mm via array to ground for proper heat spreading, and ensure the analog supply AVSS is tied to digital ground to minimize ADC noise. Programming is supported via MPLAB X IDE, MPLAB XC8 compiler, and the PICkit 5 in-circuit debugger - all covered by Microchip's free tool chain.
This page synthesizes distributor pricing, drop-in same-brand and cross-brand alternatives, and practical design notes that are not found in the manufacturer datasheet itself.
Drop-in alternatives for PIC18LF14K22T-I/ML — 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 PIC18LF14K22T-I/ML (same form factor and footprint) — differing in ADC, Package, Comparators, Timers, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF14K22-E/ML
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC18F14K22T-I/ML
✅ Drop-In✓ In Stock
$1.58 / Unit
View Datasheet →PIC18LF14K22-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF13K22T-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F13K22T-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF14K22T-I/ML Maximum Ratings & Electrical Characteristics
| Family | PIC18F/LF 14K22 series |
| Core | PIC18 8-bit RISC Harvard |
| CPU Core | PIC18 (8-bit data, 16-bit instruction) |
| Program Memory (Flash) | 16 KB (8K x 16 words) |
| Data RAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 64 MHz |
| MIPS Performance | 16 MIPS |
| Operating Voltage Range | 1.8 V to 3.6 V |
| ADC | 10-bit, 12 channels |
| Comparators | 2 (rail-to-rail, with selectable FVR) |
| I/O Pins | 18 |
| Timers | 3 (8-bit Timer0, 16-bit Timer1, 8-bit Timer2) |
| Capture/Compare/PWM | 1 ECCP + 1 CCP |
| EUSART | Yes (1) |
| MSSP (SPI / I2C) | Yes (1) |
| Internal Oscillator | 16 MHz with 4x PLL (up to 64 MHz) |
| nanoWatt XLP Sleep Current | ~20 nA typical (per datasheet) |
| Package | 20-pin QFN (4x4 mm) |
| Operating Temperature | -40 C to +85 C (Industrial, -I suffix) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes |
| MSL Level | MSL3 (per QFN package standard) |
PIC18LF14K22T-I/ML Pin Configuration
| Pin 1 | RA3/AN3/VREF+ — Bidirectional I/O / Analog input 3 / ADC positive reference |
| Pin 2 | RA2/AN2 — Bidirectional I/O / Analog input 2 |
| Pin 3 | RA1/AN1 — Bidirectional I/O / Analog input 1 |
| Pin 4 | RA0/AN0 — Bidirectional I/O / Analog input 0 |
| Pin 5 | RA7/OSC1/CLKIN — Bidirectional I/O / Crystal oscillator input / External clock in |
| Pin 6 | RA6/OSC2/CLKOUT — Bidirectional I/O / Crystal oscillator output / Clock out |
| Pin 7 | RA5/AN4/HLVDIN — Bidirectional I/O / Analog input 4 / High/Low-Voltage Detect input |
| Pin 8 | RA4/T0CKI/SOSCO — Bidirectional I/O / Timer0 clock input / Secondary oscillator output |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
| Pin 11 | RB7/ICSPDAT — Bidirectional I/O / ICSP data |
| Pin 12 | RB6/ICSPCLK — Bidirectional I/O / ICSP clock |
| Pin 13 | RB5 — Bidirectional I/O |
| Pin 14 | RB4 — Bidirectional I/O |
| Pin 15 | RC0/SOSCI/SCLKI — Bidirectional I/O / Secondary oscillator input / SOSC clock in |
| Pin 16 | RC1/CCP2 — Bidirectional I/O / Capture/Compare/PWM 2 |
| Pin 17 | RC2/P1A/ECCP1 — Bidirectional I/O / PWM output A / Enhanced CCP1 |
| Pin 18 | RC3/SDO/SDA — Bidirectional I/O / SPI data out / I2C data |
| Pin 19 | RC4/SDI/SDA — Bidirectional I/O / SPI data in / I2C data |
| Pin 20 | RC5 — Bidirectional I/O |
| Pin EP | EP — Exposed thermal pad - tie to VSS for thermal dissipation (per datasheet) |
Typical Applications
PIC18LF14K22T-I/ML is suitable for 6 applications: Battery-Powered IoT Sensor Node, Low-Power Remote Control, Portable Medical Monitoring Device, Energy-Harvesting Wireless Switch, Small Home Appliance Control Board, Industrial Sensor Hub / Modbus Node.
Battery-Powered IoT Sensor Node
The PIC18LF14K22T-I/ML is a strong fit for battery-powered IoT sensor nodes because of its nanoWatt XLP Sleep current around 20 nA and its 1.8 V to 3.6 V supply range that maps directly onto two AA alkaline cells or a single Li-ion with regulator. With 12 channels of 10-bit ADC and an integrated selectable 1.024 V / 2.048 V / 4.096 V fixed voltage reference, the part can digitize thermistors, photodiodes and gas-sensor analog outputs without a separate analog reference IC. In a typical design, the PIC wakes on RTCC alarm, scans sensors via the ADC, transmits the packet over an attached sub-GHz radio such as the MRF89XA, then returns to Sleep with peripherals off. The 20-QFN 4x4 mm footprint keeps the overall BOM small.
Recommended
Low-Power Remote Control
The PIC18LF14K22T-I/ML fits hand-held remote controls where coin-cell battery life is the primary constraint. Its nanoWatt XLP Sleep current under 20 nA, combined with the PIC18's ability to wake on external interrupt on RB0/INT or any PORTB I/O change, allows the MCU to idle in microamp-range Sleep and only spin the 64 MHz PLL when a button is pressed. The internal 16 MHz oscillator with 4x PLL provides enough MIPS to drive IR protocols or RF encoders without an external crystal. The 20-QFN package keeps the PCB small enough to fit behind a key-fob shell.
Recommended
Portable Medical Monitoring Device
The PIC18LF14K22T-I/ML is suitable for portable medical monitoring peripherals such as pulse oximetry front-ends, handheld thermometers and digital stethoscope interfaces. Its low-voltage 1.8-3.6 V operation allows direct Li-ion battery connection, while the 10-bit ADC and rail-to-rail comparators can read sensor bridges or photodiode amplifiers without external op-amps. The XLP Sleep current is critical because medical wearables spend >99% of their time idle waiting for a measurement trigger. The compact 20-QFN package supports miniaturized form factors and the industrial -40 C to +85 C temperature range covers body-worn operating conditions.
Recommended
Energy-Harvesting Wireless Switch
The PIC18LF14K22T-I/ML is a strong match for energy-harvesting wireless switches, such as EnOcean-compatible self-powered light switches or BLE beacons powered by indoor photovoltaic cells. The part wakes from Sleep in microseconds and can complete a transmit cycle within a few hundred microseconds, well within the energy budget of a typical 100 uF storage cap charged from a kinetic or solar transducer. The internal comparator can monitor the storage cap voltage to gate transmission, while the EUSART or MSSP links to a companion radio such as the RN4870 BLE module.
Recommended
Small Home Appliance Control Board
The PIC18LF14K22T-I/ML is well-suited as the main controller in small home appliances such as coffee machines, induction cooktops, humidifiers and air-quality monitors. Its 16 MIPS performance handles PWM-controlled heaters, fans and pumps using the ECCP module, while the integrated rail-to-rail comparators can monitor zero-cross detection or over-current signals directly from the AC mains bridge. The 12-channel 10-bit ADC is enough to read multiple temperature sensors, water levels, and user-interface potentiometers. The QFN-20 footprint is small enough to fit a compact control PCB alongside an AC/DC module.
Recommended
Industrial Sensor Hub / Modbus Node
The PIC18LF14K22T-I/ML is appropriate for industrial sensor hubs and Modbus RTU slave nodes where low power, small footprint and robust peripherals matter. The EUSART supports RS-485 half-duplex communication at up to 1 Mbps using an external transceiver such as the MAX485, while the 10-bit ADC with 12 channels covers multiple analog process inputs. The 16 MIPS performance comfortably runs Modbus RTU or simple CAN-like protocols. The -I industrial temperature grade covers factory-floor environments from -40 C to +85 C.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF14K22T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF14K22-E/ML | PIC18F14K22T-I/ML | PIC18LF14K22-I/ML | PIC18LF13K22T-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-QFN (4x4 mm) | 20-QFN (4x4 mm) - same | 20-QFN (4x4 mm) - same | 20-QFN (4x4 mm) - same | 20-QFN (4x4 mm) - same |
| Operating Voltage | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB |
| RAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 256 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Max CPU Frequency | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| ADC Channels x Resolution | 12 x 10-bit | 12 x 10-bit | 12 x 10-bit | 12 x 10-bit | 11 x 10-bit |
| Packaging | Tape & Reel | Tape & Reel | Tape & Reel | Tray | Tape & Reel |
Key Differentiators
- nanoWatt XLP Sleep current below 20 nA (vs PIC18F14K22T-I/ML)
- Lowest-voltage operation (1.8 V to 3.6 V) (vs PIC18F14K22T-I/ML)
- Industrial temperature grade -I matched to consumer/IoT use cases (vs PIC18LF14K22-E/ML)
Design Notes
The 20-pin QFN package has an exposed thermal pad (EP) on the underside that MUST be soldered to a PCB pad for both thermal dissipation and mechanical reliability. Drill an array of 0.3 mm thermal vias (typically 9-12 vias on a 1.0 mm pitch) under the EP and tie them to the VSS plane. Without proper EP soldering, the device's thermal resistance rises sharply and reflow reliability drops, especially under thermal-cycling stress.
Estimated: at 64 MHz active and 3.3 V VDD, the PIC18LF14K22T-I/ML typically draws ~5-8 mA active, but in Sleep with peripherals off it falls to ~20 nA. For coin-cell designs, ensure the average current budget accounts for <1% active duty cycle - the nanoWatt XLP modes (Sleep, Deep Sleep, and RTCC with external 32.768 kHz crystal) are essential to hit multi-year battery life. Decouple VDD with 100 nF ceramic close to the pin and a bulk 1-10 uF cap on the supply rail.
When migrating from the PIC18F14K22 (F variant, 1.8-5.5 V) to the PIC18LF14K22T-I/ML (LF variant, 1.8-3.6 V), do NOT apply 5 V to VDD - this will damage it. Also, the PIC18LF14K22T-I/ML ADC is optimized for 3.3 V operation; for 5 V analog signals, use the F variant or add an external resistor divider. The PLL has minimum VDD requirements and may not lock reliably below 2.0 V - check datasheet parameter D016 (PLL lock threshold) before relying on 64 MHz operation at low voltages.
The PIC18LF14K22T-I/ML ADC accuracy depends heavily on clean analog and digital supplies. Place a ferrite bead or small RC filter between VDD and AVSS-equivalent routing (VSS pin 9) to prevent digital switching noise from coupling into the ADC reference. For high-impedance analog sources, add an op-amp buffer or sample-and-hold capacitor; the 10-bit ADC with 4.096 V FVR has an LSB of 4 mV and source impedance above 10 kohm will degrade conversion accuracy.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified - choose PIC18F14K22-I/ML automotive variant for AEC-Q100 Grade 1, or use external regulator E-only reference. Lead-free (Pb-free) reflow-compatible per JEDEC J-STD-020.
