PIC18F14K22-I/ML - 8-bit 64MHz XLP 16KB Flash MCU QFN-20 | Microchip
MPN: PIC18F14K22-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.2 | $2.20 |
| 10 | $1.97 | $19.70 |
| 100 | $1.75 | $175.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.38 | $1,380.00 |
PIC18F14K22-I/ML Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory (Flash), working memory (RAM), non-volatile data memory (EEPROM), and configurable peripherals. In the embedded hierarchy, the PIC18F14K22 belongs to the 8-bit PIC18 family, sits under the broader PIC microcontroller umbrella, and connects upward to the nanoWatt XLP low-power sub-family. The PIC18 architecture is C-compiler optimized and offers an industry-leading peripheral set, making this 20-pin device ideal for cost-sensitive, space-constrained designs.
Key features include a 16 MHz precision internal oscillator (with 4X PLL for 64 MHz operation), 12 channels of 10-bit ADC, dual rail-to-rail comparators, an on-chip selectable Fixed Voltage Reference, multiple timer/counter modules (Timer0/Timer1/Timer2), enhanced USART, MSSP (SPI/I2C), and nanoWatt XLP technology for ultra-low sleep currents. The 20-pin QFN (4x4mm) footprint fits tight PCB layouts while still exposing two analog comparators, PWM, and 17 I/O pins.
The PIC18F14K22 is designed around Microchip's enhanced Harvard RISC architecture with a modified instruction set and 16-bit wide instructions. nanoWatt XLP technology enables sleep currents below 100 nA typical, allowing battery-powered designs to operate for years on a single cell. Internal RC oscillator and PLL eliminate external crystal cost in many applications.
Typical applications include low-power IoT sensor nodes, consumer electronics remote controls, battery-powered HVAC sensors, LED lighting controllers, and small appliance interfaces. The combination of XLP sleep current, 10-bit ADC, and small QFN package suits compact, energy-constrained designs.
When designing with this MCU, budget analog and digital supply pins separately (AVDD/AVSS) and place the decoupling capacitor within a few millimeters of the QFN thermal pad. For low-power applications, use the DNT/SLEEP/IDLE modes and the on-chip LFINTOSC to minimize current draw.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, enabling engineers to evaluate the PIC18F14K22-I/ML for compact, low-power 8-bit embedded designs.
Drop-in alternatives for PIC18F14K22-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 PIC18F14K22-I/ML (same form factor and footprint) — differing in Package, ADC, Comparators, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F13K22-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F14K22T-I/ML
✅ Drop-In✓ In Stock
$1.58 / Unit
View Datasheet →PIC18F13K22T-I/SS
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F1458-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F14K50-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F14K22-I/ML Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit RISC |
| Program Memory Size | 16 KB (8K x 16) Flash |
| SRAM | 512 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 64 MHz (16 MIPS @ 3V) |
| Supply Voltage | 2.5V / 3.3V / 5V |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 20-pin QFN (4x4) with EP |
| I/O Pins | 17 |
| ADC | 12-channel, 10-bit |
| Comparators | 2 x rail-to-rail |
| Timers | Timer0, Timer1, Timer2 |
| Communication | EUSART, MSSP (SPI / I2C) |
| PWM Channels | Enhanced CCP / ECCP |
| Internal Oscillator | 16 MHz precision (with 4X PLL to 64 MHz) |
| Low-Power Technology | nanoWatt XLP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F14K22-I/ML Pin Configuration
| Pin 1 | RA5/OSC1/CLKI/AN4/C1IN3-/HLVDIN/T1CKI/RP2 — PORTA bit 5 / oscillator input / analog input / comparator input |
| Pin 2 | RA4/OSC2/CLKO/AN3/C1OUT/SRQ/T5G — PORTA bit 4 / oscillator output / analog input / comparator output |
| Pin 3 | RA3/AN17-/MCLR/VPP — PORTA bit 3 / analog input / Master Clear / programming voltage |
| Pin 4 | RC5/RX/DT/CCP1/RP3 — PORTC bit 5 / EUSART RX / CCP1 PWM output |
| Pin 5 | RC4/TX/CK/SDA/SDO/RP4 — PORTC bit 4 / EUSART TX / I2C SDA / SPI SDO |
| Pin 6 | RC3/AN15-/SCL/SCK/RP5 — PORTC bit 3 / analog input / I2C SCL / SPI SCK |
| Pin 7 | RC2/AN14-/CCP1/P1A/RP6 — PORTC bit 2 / analog input / enhanced CCP1 PWM |
| Pin 8 | RC1/AN12-/CCP2/P2A/RP7 — PORTC bit 1 / analog input / CCP2 PWM |
| Pin 9 | RC0/AN10-/SOSCO/SOSCI/RP8 — PORTC bit 0 / analog input / secondary oscillator |
| Pin 10 | RA2/AN2/C2IN+/DACOUT/SDA2/SS2/RP1 — PORTA bit 2 / analog input / comparator / DAC output / I2C secondary |
| Pin 11 | RA1/AN1/C2IN0-/VREF-/ICSPCLK/RP0 — PORTA bit 1 / analog input / comparator / VREF negative |
| Pin 12 | RA0/AN0/C1IN0+/VREF+/ICSPDAT — PORTA bit 0 / analog input / comparator / VREF positive |
| Pin 13 | VSS — Ground reference |
| Pin 14 | VDD — Positive supply voltage |
| Pin 15 | RB7/AN15/C2OUT/T0CKI/RP9 — PORTB bit 7 / analog input / comparator output / Timer0 clock |
| Pin 16 | RB6/AN5/C1OUT/RP10 — PORTB bit 6 / analog input / comparator output |
| Pin 17 | RB5/AN11/C1IN3+/CCP3/RP11 — PORTB bit 5 / analog input / comparator input / CCP3 |
| Pin 18 | RB4/AN9/C2IN-/SCL2/RP12 — PORTB bit 4 / analog input / comparator / I2C secondary |
| Pin 19 | RB3/AN7/C1IN2-/CCP2/SCL1/RP13 — PORTB bit 3 / analog input / comparator / CCP2 / I2C |
| Pin 20 | RB2/AN6/C2IN2-/SS1/RP14 — PORTB bit 2 / analog input / comparator / SPI slave select |
Typical Applications
PIC18F14K22-I/ML is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Consumer Remote Controls, HVAC Thermostat Sensors, LED Lighting Controllers, Small Appliance Interfaces, Industrial Sensor Transmitters.
Battery-Powered IoT Sensor Nodes
The PIC18F14K22-I/ML fits IoT sensor node designs because of its 100 nA typical sleep current and 64 MHz CPU clock for rapid sensor reads. The 10-bit ADC with 12 channels samples temperature, humidity, or analog sensor outputs without external analog front-end ICs. Placed on a 2-layer coin-cell PCB, the device wakes from a timer interrupt, samples sensors, transmits over EUSART/MSSP, then re-enters XLP Sleep for sub-microamp standby. Total board current during 1 sample per minute is dominated by sleep current, yielding multi-year battery life on a CR2032 cell.
Recommended
Consumer Remote Controls
Infrared remote controls benefit from the PIC18F14K22-I/ML's small QFN footprint, low cost, and PWM capability for carrier generation. The EUSART and timers can drive 38 kHz IR modulation while the ADC reads analog buttons or capacitive touch sense inputs. Powered from two AAA cells through a 3.3V LDO, the device's XLP Sleep mode keeps standby current negligible between key presses, with <100 nA typical sleep current extending battery life to multi-year ranges.
Recommended
HVAC Thermostat Sensors
HVAC thermostat sensor modules use the PIC18F14K22-I/ML for its 12-channel 10-bit ADC and dual comparators that interface directly with NTC thermistors and humidity sensors. The 16 KB Flash allows simple PID control loops and display drivers without external memory. Operating at industrial -40C to +85C, the device tolerates the harsh thermal environment inside HVAC enclosures. Sleep current below 100 nA plus on-chip LFINTOSC eliminates external crystal cost.
Recommended
LED Lighting Controllers
LED lighting controllers, including architectural dimmers and color-mixing fixtures, pair well with the PIC18F14K22-I/ML's enhanced CCP/ECCP PWM channels for precise dimming and color mixing. The 64 MHz CPU allows fast PWM rates that eliminate visible flicker, while 16 KB Flash stores calibration tables and DMX/RDM protocols. The 20-pin QFN (4x4) footprint fits inside tight fixture housings.
Recommended
Small Appliance Interfaces
Small appliance user-interface boards leverage the PIC18F14K22-I/ML for key scanning, LED driving, and PWM buzzer tones. The 17 I/O pins handle 4x4 key matrices, status LEDs, and rotary encoder inputs. XLP Sleep with peripheral disable keeps standby current below 1 microamp when the appliance is idle, helping products meet energy-star standby limits. The 4 mm QFN footprint enables placement behind displays.
Recommended
Industrial Sensor Transmitters
Industrial 4-20 mA loop-powered sensor transmitters use the PIC18F14K22-I/ML for its industrial -40C to +85C rating and on-chip 10-bit ADC. With careful power budgeting, the device can be powered directly from a 4-20 mA loop running at 3.5 mA minimum, leveraging XLP Sleep to keep average current low. MSSP (I2C/SPI) interfaces to digital sensors or external DACs for current-loop output, while the 16 MIPS CPU handles linearization and HART-style signaling.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F14K22-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F13K22-I/ML | PIC18F14K22T-I/ML | PIC16F1458-I/ML | PIC18F14K50-I/ML |
|---|---|---|---|---|---|
| Package | 20-QFN (4x4) ML | 20-QFN (4x4) ML - same | 20-QFN (4x4) ML - same | 20-QFN (4x4) ML - same | 20-QFN (4x4) ML - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 8 KB | 16 KB | 7 KB | 16 KB |
| SRAM | 512 B | 512 B | 512 B | 512 B | 768 B |
| Max CPU Clock | 64 MHz (16 MIPS @ 3V) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 48 MHz | 48 MHz |
| ADC Channels x Bits | 12 x 10-bit | 12 x 10-bit | 12 x 10-bit | 9 x 10-bit | 13 x 10-bit |
| USB | No | No | No | Yes (USB 2.0 FS device) | Yes (USB 2.0 FS device + host) |
| Low-Power Technology | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt | nanoWatt XLP |
Key Differentiators
- Highest Flash density in the PIC18F1XK22 20-pin QFN family (vs PIC18F13K22-I/ML)
- Industrial temperature grade in compact QFN (vs PIC18F14K22-E/ML)
- PIC18 C-compiler-optimized core over PIC16 baseline (vs PIC16F1458-I/ML)
Design Notes
The PIC18F14K22-I/ML supports 2.5V to 5.5V single-supply operation. Place a 100 nF decoupling capacitor as close as possible to the VDD pin and a 10 uF bulk capacitor on the supply rail. For battery applications, ensure the MCLR pull-up is implemented with a high-impedance resistor (typically 47 kohm) to limit quiescent current; do not leave MCLR floating. Sleep-mode current is minimized by disabling unused peripherals via the PMD (Peripheral Module Disable) registers before entering Sleep.
The 20-pin QFN (4x4mm) package exposes a center thermal pad that MUST be soldered to a PCB pad of at least 50% of the package body size to meet thermal and mechanical reliability specs. Connect this thermal pad to the VSS plane for best ground integrity and lowest EMI. Keep analog traces (RA0-RA5, RC0-RC2, RB2-RB7 used as analog inputs) short and isolated from switching signals; place the AVDD/AVSS pins next to quiet ground and add a ferrite bead if AVDD is supplied from a noisy rail.
Avoid these pitfalls: (1) Do not assume all PORTA/PORTB pins are 5V tolerant - check the datasheet absolute maximum ratings; the AN-input pins tolerate only VDD+0.3V. (2) The internal 16 MHz HFINTOSC is precision-tuned at 3V but drifts at 5V; calibrate via the OSCTUNE register if accuracy matters. (3) When using MSSP in I2C mode, always enable the internal weak pull-ups or use external pull-ups on SDA/SCL to meet rise-time specs. (4) Read-modify-write on PORT registers is unsafe on PIC18 - use the LATx registers instead.
Compliance Information
RoHS compliant per Microchip product page and DigiKey listing. Industrial temperature grade (-40C to +85C) only; not AEC-Q100 qualified - choose PIC18F14K22-E/ML for -40C to +125C extended automotive-non-Q100 applications. For full AEC-Q100, evaluate PIC18F family Q1 variants.
