PIC18LF14K22-I/SO - 16KB Flash 8-bit XLP MCU | Microchip
MPN: PIC18LF14K22-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.77 | $1.77 |
| 10 | $1.59 | $15.90 |
| 100 | $1.42 | $142.00 |
| 500 | $1.28 | $640.00 |
| 1,000 | $1.15 | $1,150.00 |
PIC18LF14K22-I/SO Overview
What is a PIC18 microcontroller? The PIC18 is Microchip's high-performance 8-bit RISC MCU family, positioned above the PIC16 and PIC10/12/16 baseline families in the PIC taxonomy (8-bit PIC -> PIC18 -> PIC18F1XK22 sub-family). PIC18 MCUs use a Harvard architecture with separate program and data buses, a hardware multiplier, and C-compiler-optimized instruction set. The nanoWatt XLP technology reduces standby current to the nanoampere range, allowing battery-powered designs to sleep for years.
Key features include 16 KB self-programmable Flash, 512 bytes SRAM, 256 bytes EEPROM, 18 I/O pins, 12-bit ADC with up to 11 channels, enhanced CCP/PWM, mTouch capacitive touch support, internal oscillator up to 64 MHz, and ultra-low-power sleep current. The 20-pin SOIC footprint is industry-standard, easing layout and prototyping, while the 8-bit core and 16 MIPS throughput target cost-sensitive embedded control.
Typical applications include low-power battery sensors, capacitive touch user interfaces, consumer appliance control, IoT edge nodes, and LIN slave nodes in automotive body electronics. Peripherals such as mTouch and 12-bit ADC allow direct sensor integration without external analog ICs, while the LIN hardware block enables automotive-grade sub-bus communication.
When designing with this device, the user should bias I/O carefully within the 1.8 V to 3.6 V supply range and verify that the chosen decoupling capacitance satisfies Microchip's Vdd/Vss layout rules. The debugger interface uses ICSP, supported by MPLAB X IDE and the MPLAB Code Configurator (MCC).
This page synthesizes distributor pricing, drop-in alternatives, design notes, and parametric comparisons not found on a single distributor product page. Cross-reference recommendations follow Microchip's own PIC18F1XK22 family tree.
Drop-in alternatives for PIC18LF14K22-I/SO — 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-I/SO (same form factor and footprint) — differing in Package, Core Architecture, Timers, ADC, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F14K22-I/SO
✅ Drop-In✓ In Stock
$1.52 / Unit
View Datasheet →PIC18LF13K22-I/SO
✅ Drop-In✓ In Stock
$1.68 / Unit
View Datasheet →PIC18LF14K22-I/SO Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit RISC |
| Program Memory | 16 KB Flash |
| SRAM | 512 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Supply Voltage (LF) | 1.8 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial) |
| I/O Pins | 18 |
| ADC | 12-bit, up to 11 channels |
| PWM | Enhanced CCP / PWM modules |
| Capacitive Touch | mTouch peripheral |
| Communication | I2C, SPI, UART/USART, LIN |
| Package | 20-SOIC (0.295", 7.50 mm width) |
| Mounting Type | Surface Mount |
| RoHS | Compliant |
| Debugger | ICSP via MPLAB X |
PIC18LF14K22-I/SO Pin Configuration
| Pin 1 | RA3/AN3/C1IN+/VREF+ — Bidirectional I/O / analog input / comparator input / ADC reference positive |
| Pin 2 | RA2/AN2 — Bidirectional I/O / analog input |
| Pin 3 | RA1/AN1 — Bidirectional I/O / analog input |
| Pin 4 | RA0/AN0 — Bidirectional I/O / analog input |
| Pin 5 | RA7/OSC1/CLKIN — Bidirectional I/O / crystal oscillator input / external clock input |
| Pin 6 | RA6/OSC2/CLKOUT — Bidirectional I/O / crystal oscillator output / clock output |
| Pin 7 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RB7/ICSPDAT/PGD — Bidirectional I/O / ICSP data / programming data |
| Pin 10 | RB6/ICSPCLK/PGC — Bidirectional I/O / ICSP clock / programming clock |
| Pin 11 | RB5/AN11 — Bidirectional I/O / analog input 11 |
| Pin 12 | RB4/AN10 — Bidirectional I/O / analog input 10 |
| Pin 13 | RC7/RX/DT — Bidirectional I/O / EUSART RX / LIN data |
| Pin 14 | RC6/TX/CK — Bidirectional I/O / EUSART TX / LIN clock |
| Pin 15 | RC5 — Bidirectional I/O |
| Pin 16 | RC4/SDA/SDI — Bidirectional I/O / I2C data / SPI data in |
| Pin 17 | RC3/SCL/SCK — Bidirectional I/O / I2C clock / SPI clock |
| Pin 18 | RC2/CCP1 — Bidirectional I/O / Capture/Compare/PWM 1 |
| Pin 19 | RC1/CCP2 — Bidirectional I/O / Capture/Compare/PWM 2 |
| Pin 20 | RC0 — Bidirectional I/O |
Typical Applications
PIC18LF14K22-I/SO is suitable for 6 applications: Battery-Powered Sensor Node, Capacitive Touch User Interface, LIN Slave Node in Automotive Body Electronics, Consumer Appliance Control, IoT Edge Sensor with UART/SPI Bridge, Industrial Control Module (Sub-MCU).
Battery-Powered Sensor Node
The PIC18LF14K22-I/SO's nanoWatt XLP technology delivers sub-microampere sleep current, making it ideal for battery-powered sensor nodes running on coin cells or 2xAA. The LF 1.8 V to 3.6 V supply range matches Li-ion and alkaline chemistries directly without boost conversion. With 16 KB Flash, 512 bytes SRAM, and 256 bytes EEPROM, the device can host a small RTOS-style scheduler, store calibration data in EEPROM, and run periodic ADC readings of temperature, humidity, or light sensors before returning to deep sleep. The 12-bit ADC and mTouch peripheral allow direct sensor integration, eliminating external analog ICs and reducing BOM cost. Versus the PIC18F14K22 (5 V tolerant), the LF variant is preferred when I/O voltages stay at or below 3.6 V, where its tighter supply range yields lower quiescent current and longer battery life in duty-cycled sensor designs.
Recommended
Capacitive Touch User Interface
The PIC18LF14K22-I/SO integrates Microchip's mTouch capacitive touch sensing peripheral, supporting multiple touch electrodes through the CVD (Charge-Voltage Discharge) technique without external analog ICs. The 20-SOIC variant exposes up to 11 mTouch channels on shared I/O pins, enabling button sliders, wheel patterns, and proximity sensors in a single MCU. The 16 KB Flash comfortably fits mTouch libraries plus application logic, while 512 bytes SRAM handles debounce and gesture state. Compared to mechanical switches, capacitive touch provides sealed, wear-free interfaces suitable for kitchen appliances, consumer electronics, and industrial control panels. The LF 1.8 V to 3.6 V range simplifies direct coin-cell or Li-ion powering for portable touch products.
Recommended
LIN Slave Node in Automotive Body Electronics
The PIC18LF14K22-I/SO includes a hardware LIN transceiver interface compatible with the LIN 1.3/2.0/2.1 standards, well-suited for non-safety automotive body applications such as window lift switches, mirror controls, seat adjusters, and ambient lighting nodes. The 64 MHz / 16 MIPS throughput comfortably handles LIN protocol framing plus application firmware, while 16 KB Flash supports bootloader and OTA-style updates. Note: the LF variant is intended for 1.8 V to 3.6 V operation; in vehicles with a 12 V bus the part is paired with an external LIN transceiver (e.g. MCP2003A/MCP2050) and a local 3.3 V LDO. The -40C to +85C industrial temperature grade covers in-cabin and under-hood-near applications; for harsher under-hood environments the 'E' (extended -40C to +125C) variant should be selected instead.
Recommended
Consumer Appliance Control
The PIC18LF14K22-I/SO is well-suited for cost-sensitive consumer appliances such as coffee makers, rice cookers, blenders, and small kitchen electronics that need precise PWM motor control, temperature sensing, and capacitive touch buttons. The 12-bit ADC samples thermistor or NTC sensors for closed-loop temperature control, while enhanced CCP/PWM modules drive TRIACs, MOSFETs, or relay coils. The 16 KB Flash holds application code plus user-interface strings; 256 bytes EEPROM stores calibration constants and user preferences across power cycles. Compared with smaller PIC16 parts, the PIC18LF14K22 brings C-compiler optimization and a hardware multiplier that simplifies PID control loops and motor timing math.
Recommended
IoT Edge Sensor with UART/SPI Bridge
The PIC18LF14K22-I/SO acts as an edge sensor bridge that aggregates analog and digital sensor data over I2C/SPI and forwards it over UART or LIN to a host processor. The 64 MHz core and 16 MIPS throughput handle up to 11 ADC channels at moderate sample rates without bottlenecks. The 16 KB Flash hosts command parsing, sensor drivers, and a small protocol stack, while 512 bytes SRAM buffers incoming/outgoing packets. With the LF 1.8 V to 3.6 V supply range, the part is happy to share a 3.3 V rail with the host SoC. In sleep mode the XLP nanoWatt technology drops current to the nanoampere range, letting the bridge stay resident but inactive until a host poll arrives.
Recommended
Industrial Control Module (Sub-MCU)
As a sub-MCU in industrial control modules, the PIC18LF14K22-I/SO offloads housekeeping tasks such as LED driving, keypad scanning, watchdog timing, and local I/O expansion from a larger host processor. The 20-SOIC footprint is industry-standard, simplifying layout when the sub-MCU is added to an existing PCB. The -40C to +85C industrial temperature grade suits factory floor environments, and 16 KB Flash is sufficient for protocol translation, debounce, and indicator logic. The PIC18LF14K22's robust peripheral set (UART/SPI/I2C/LIN) and 12-bit ADC simplify integration with sensors, actuators, and HMI panels in PLC racks and machine controllers.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF14K22-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F14K22-I/SO | PIC18LF14K22-I/P | PIC18LF14K22-I/SS | PIC18LF13K22-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SOIC (0.295") | 20-SOIC (0.295") - same | 20-PDIP - different | 20-SSOP - different | 20-SOIC (0.295") - same |
| Supply Voltage | 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) | 1.8 V to 3.6 V (LF) |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB |
| SRAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Max CPU Speed | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Lowest supply voltage variant in the PIC18F14K22 family (vs PIC18F14K22-I/SO)
- Larger Flash than sibling PIC18LF13K22 (vs PIC18LF13K22-I/SO)
- On-chip mTouch capacitive touch sensing (vs PIC18F46K22-I/P)
Design Notes
The LF 1.8 V to 3.6 V supply range targets battery-powered designs. Place a 100 nF ceramic decoupling capacitor as close as possible to the Vdd pin (pin 7) and a bulk 10 uF capacitor near the Vss pin (pin 8). For battery applications, the nanoWatt XLP sleep current drops below 1 uA when peripherals are disabled. Per Microchip's datasheet, Vdd must remain within the absolute maximum ratings of -0.3 V to +4.0 V to avoid latch-up.
Keep the ICSPDAT/ICSPCLK traces (RB7/RB6) short and route them away from switching noise sources to avoid debugger/programming glitches. If the internal oscillator is used, no crystal load capacitors are required; for an external crystal on RA6/RA7, follow Microchip's oscillator layout guidelines (short, symmetric traces, ground guard ring). Place the ICSP connector at the board edge for in-circuit programming access.
Do not apply 5 V to any I/O pin when using the LF (1.8 V to 3.6 V) variant - this exceeds the absolute maximum Vih. If a 5 V signal must be read, add a series resistor or level translator. Also verify that analog reference (VREF+) does not exceed Vdd + 0.3 V to avoid ADC inaccuracies. The MCLR pin (configured as RA3 by default) requires proper handling; if unused, tie to Vdd through a 10 kohm pull-up.
At 64 MHz the PIC18LF14K22-I/SO typically draws around 10-15 mA active current; power dissipation is well under 100 mW and thermal concerns are negligible. In sleep modes current drops to sub-microamp levels, allowing extended battery life. Ensure that high-current GPIO loads (LEDs, relays) are driven through external transistors rather than directly from the MCU pin to keep pin sink/source current below the datasheet maximum of 25 mA per pin.
Compliance Information
RoHS compliant per Mouser and Newark listings. Not AEC-Q100 qualified - for AEC-Q100 automotive applications, select the PIC18F14K22-E or PIC18LF14K22-E variants which support the extended -40C to +125C temperature grade.
