PIC18LF14K22-E/ML - 8-bit XLP MCU 16KB Flash 20-QFN | Microchip
MPN: PIC18LF14K22-E/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.49 | $14.90 |
| 100 | $1.32 | $132.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
PIC18LF14K22-E/ML Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, peripherals, and I/O on one die. The PIC18LF14K22 belongs to the 8-bit PIC18 family - a modified Harvard RISC architecture that is C-compiler optimized and widely supported by the MPLAB X toolchain. Within the broader taxonomy, this device sits as: PIC18LF14K22 -> PIC18 MCU family -> 8-bit microcontroller -> embedded microcontroller -> semiconductor IC. Its nanoWatt XLP technology extends this category into battery-powered applications where quiescent current in the microamp range matters.
Key features include 18 general-purpose I/O lines, 10-bit ADC, two comparators, capture/compare/PWM modules, and configurable serial interfaces (EUSART, I²C, SPI). The device operates from 1.8 V to 3.6 V supply (LF suffix), supports ICSP and in-circuit debugging via MPLAB tools, and offers enhanced low-power sleep modes. According to the verified Microchip datasheet, the 20-QFN package is well-suited to space-constrained PCB designs where the exposed thermal pad aids dissipation during active transmission.
Architecturally, the LF14K22 combines a 16-bit instruction word with an 8-bit data path, allowing single-cycle execution at 48 MHz (16 MIPS). Internal features such as a configurable oscillator, on-chip voltage reference, and a fixed-voltage reference (FVR) reduce external component count. Compared to the non-LF PIC18F14K22 variant, the LF part targets lower voltage rails (down to 1.8 V) for direct Li-ion or two-AAA battery operation.
Typical applications include wearable health and fitness devices, remote sensor nodes, low-power wireless modules, USB HID interfaces (the closely-related PIC18LF14K50), home automation endpoints, and industrial sensor front-ends. The combination of nanoWatt XLP sleep currents and 16 MIPS throughput makes it equally at home in always-on IoT edge nodes and battery-powered handheld instruments.
When designing with this part, allocate the exposed pad (EP) as a continuous copper pour on the top layer tied to VSS for thermal and electrical performance. Choose decoupling capacitors (100 nF + 1 µF minimum) as close as practical to VDD/VSS, and follow Microchip AN1254 'Microcontroller Emulation' guidance when planning debug header placement.
This page synthesizes distributor pricing, verified drop-in alternatives within the same 20-QFN footprint, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC18LF14K22-E/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 PIC18LF14K22-E/ML (same form factor and footprint) — differing in ADC, Operating Temperature, Package, Core, Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF14K22-I/ML
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →PIC18F14K22-I/ML
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC18LF14K22-E/ML Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC |
| Family | PIC® XLP™ 18K |
| Program Memory (Flash) | 16 KB (8K x 16) |
| SRAM | 512 bytes |
| EEPROM | 256 bytes |
| Max CPU Speed | 48 MHz |
| Performance | 16 MIPS |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 18 |
| ADC | 10-bit |
| Comparators | 2 |
| Timers (8/16-bit) | Yes (multiple) |
| CCP/ECCP Modules | Yes |
| EUSART | 1 |
| I²C | 1 (MSSP) |
| SPI | 1 (MSSP) |
| Package | 20-QFN (4x4 mm) with EP |
| Operating Temperature | -40 °C to +125 °C (E suffix) |
| Low-Power Technology | nanoWatt XLP |
| Programming/Debug | ICSP via MPLAB ICD/PICkit |
| RoHS | Compliant |
PIC18LF14K22-E/ML Pin Configuration
| Pin 1 | RA3/AN3/VREF+ — Digital I/O / analog input / voltage reference |
| Pin 2 | RA2/AN2 — Digital I/O / analog input |
| Pin 3 | RA1/AN1 — Digital I/O / analog input |
| Pin 4 | RA0/AN0 — Digital I/O / analog input |
| Pin 5 | VDD — Positive supply |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RA7/OSC1/CLKIN — Digital I/O / crystal oscillator input |
| Pin 8 | RA6/OSC2/CLKOUT — Digital I/O / crystal oscillator output |
| Pin 9 | RC5/CPP1 — Digital I/O / CCP1 PWM output |
| Pin 10 | RC4/SDA/SDI — Digital I/O / I²C data / SPI input |
| Pin 11 | RC3/SCL/SCK — Digital I/O / I²C clock / SPI clock |
| Pin 12 | RC2/CCP1/P1A — Digital I/O / CCP1 output |
| Pin 13 | RC1/T6CK/C6OUT — Digital I/O / timer clock / comparator output |
| Pin 14 | RC0/T13CKI — Digital I/O / timer input |
| Pin 15 | RB7/T0CKI/ICSPDAT — Digital I/O / timer input / ICSP data |
| Pin 16 | RB6/ICSPCLK — Digital I/O / ICSP clock |
| Pin 17 | RB5 — Digital I/O |
| Pin 18 | RB4 — Digital I/O |
| Pin 19 | RC7 — Digital I/O |
| Pin 20 | RC6 — Digital I/O |
Typical Applications
PIC18LF14K22-E/ML is suitable for 6 applications: Battery-Powered Wearable Sensor, Industrial 4-20 mA Loop Transmitter, Home Automation Sensor Node, Automotive Interior Accessory Controller, Smart Meter / Utility Endpoint, USB HID to UART/I²C Bridge (using K50 sibling).
Battery-Powered Wearable Sensor
The PIC18LF14K22-E/ML fits battery-powered wearable sensor designs because of its nanoWatt XLP sleep current (sub-µA typical) and 1.8 V minimum supply, allowing direct operation from a single CR2032 coin cell. With 18 I/O pins and a 10-bit ADC, it can scan a heart-rate or temperature sensor front-end while spending most of its time in sleep, waking only on an interrupt. Its 16 MIPS throughput is sufficient to run a small RTOS or a polled state-machine that posts data over a low-power BLE link.
Recommended
Industrial 4-20 mA Loop Transmitter
In a 4-20 mA loop transmitter, the PIC18LF14K22-E/ML digitizes a sensor with its 10-bit ADC, then drives the loop via an external PWM-driven controller. Its 16-bit instruction word simplifies scaling math, and the 1.8-3.6 V range accommodates loop-powered designs where headroom is limited. The extended -40 °C to +125 °C temperature grade (E suffix) is critical for outdoor or process-control environments, and the 20-QFN EP aids thermal dissipation when the device runs continuously.
Recommended
Home Automation Sensor Node
For a Zigbee/Thread/BLE end-device, the PIC18LF14K22-E/ML acts as a host MCU that manages a connected radio module over SPI or UART. Its EUSART, I²C, and SPI peripherals cover nearly every low-power radio's interface requirement, and the 16 KB Flash is large enough to hold a Zigbee cluster library or a BLE GATT table. nanoWatt XLP sleep currents extend coin-cell life past one year in typical duty-cycled reporting profiles, while 16 MIPS supports secure boot and over-the-air update routines.
Recommended
Automotive Interior Accessory Controller
Inside a cabin accessory such as a heads-up display controller or LED ambient-light driver, the PIC18LF14K22-E/ML provides PWM (via CCP/ECCP), ADC for ambient sensing, and LIN/EUSART for body-network communication. The -40 °C to +125 °C extended temperature grade handles cabin thermal stress, while the 20-QFN 4x4 mm footprint fits behind instrument-cluster bezels. Designers add an external CAN/LIN transceiver when the target bus is CAN; this part handles only the protocol layer in that case.
Recommended
Smart Meter / Utility Endpoint
The PIC18LF14K22-E/ML is a strong fit for electricity, gas, or water meter endpoints because its low sleep current and wide supply range allow multi-year battery operation, while the 16-bit Flash endurance supports frequent EEPROM-backed tamper logging. The 10-bit ADC reads sensor pulses or current-shunt voltage directly, and the EUSART drives an optical port for in-field readout. With 256 bytes of EEPROM, designers can store 30 days of hourly profile data without external NVM, simplifying the BOM.
Recommended
USB HID to UART/I²C Bridge (using K50 sibling)
Although the PIC18LF14K22-E/ML itself lacks USB, designers targeting a 20-QFN USB bridge frequently compare it to the PIC18LF14K50-I/ML, which is pin-compatible but adds USB 2.0 Full-Speed. For HID-to-UART or HID-to-I²C bridges used in test equipment and POS terminals, the K50 variant is the practical choice while preserving the same PCB layout, MPLAB toolchain, and firmware architecture developed for the K22. Voltage range remains 1.8-3.6 V (LF).
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF14K22-E/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF14K22-I/ML | PIC18F14K22-I/ML | PIC18LF13K22-I/SO |
|---|---|---|---|---|
| Package | 20-QFN (4x4 mm) with EP | 20-QFN (4x4 mm) with EP - same | 20-QFN (4x4 mm) with EP - same | 20-SOIC (different footprint) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 16 KB | 16 KB | 16 KB | 8 KB |
| SRAM | 512 bytes | 512 bytes | 512 bytes | 256 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V | 1.8 V to 3.6 V |
| Max CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Operating Temperature | -40 °C to +125 °C (E) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) |
| I/O Pins | 18 | 18 | 18 | 18 |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit |
Key Differentiators
- Extended -40 °C to +125 °C temperature grade for industrial/automotive interior (vs PIC18LF14K22-I/ML)
- Strict 3.6 V supply ceiling (LF) for low-power battery designs (vs PIC18F14K22-I/ML)
- 16 KB Flash for 8-bit C applications (vs PIC18LF13K22-I/SO)
Design Notes
The 20-QFN (4x4 mm) package exposes a thermal pad (EP) on the underside. Solder the EP to a continuous VSS copper pour on the top layer, with thermal vias to the inner ground plane, to keep junction temperature low during sustained 48 MHz operation. In typical sensor-node duty cycles the average dissipation is negligible, but continuous transmit loops or PWM-heavy motor control benefit from the EP pour.
Place a 100 nF decoupling capacitor within 3 mm of the VDD pin and a bulk 1 µF capacitor near the device. Both should reference the same VSS node as the EP pour to minimize switching noise coupling into the ADC. For designs using the internal oscillator, route RA6/RA7 away from switching traces if they are repurposed as digital I/O after boot.
The LF suffix indicates 1.8-3.6 V operation only - applying 5 V will damage the part. If the design needs 5 V tolerance, use the PIC18F14K22-I/ML pin-compatible variant. Also, ICSP pins RB6 (ICSPCLK) and RB7 (ICSPDAT) must be accessible on the production PCB; routing them only to test points can complicate in-field firmware updates.
Compliance Information
RoHS and lead-free confirmed via Microchip product page and DigiKey/Mouser listing. AEC-Q100 qualification status not specified in the verified datasheet - this part is not marketed as automotive grade despite the -40 °C to +125 °C rating. Halogen-free status not explicitly stated in the verified data.
