PIC18F14K22-E/ML - 8-bit 48MHz 16KB Flash MCU | Microchip
MPN: PIC18F14K22-E/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.64 | $2.64 |
| 10 | $2.42 | $24.20 |
| 100 | $2.15 | $215.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.71 | $1,710.00 |
PIC18F14K22-E/ML Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM), data memory (RAM), and integrated peripherals such as timers, communication interfaces, and analog blocks. The PIC18F family is Microchip's high-performance 8-bit architecture optimized for C compiler efficiency; PIC18F1XK22 sub-family variants shrink the PIC18 feature set into 20-pin / 28-pin packages aimed at cost- and power-sensitive embedded designs. Within the broader taxonomy, the PIC18F14K22 sits under microcontroller -> embedded controller -> semiconductor -> integrated circuit, making it a typical building block for sensor nodes, appliance controls, and battery-powered IoT edge devices.
Key features include 17 I/O pins with high-current sink/source capability, hardware USART, SPI, and I2C peripherals, two capture/compare/PWM modules, and nanoWatt XLP modes that drop the active current below 100 nA in Sleep. The internal 16 MHz precision oscillator can be combined with the 4x PLL to reach 64 MHz at 3V, eliminating the need for an external crystal in most designs. Integrated peripherals also include an Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART) and an MSSP peripheral supporting both SPI and I2C master/slave operation.
The QFN-20 (ML) package provides a thermal resistance of approximately 43 C/W and a 4x4 mm footprint suited to compact PCB layouts. The E suffix in the part number designates the Extended (-40C to +125C) operating temperature range required for industrial and automotive under-hood environments, while the ML suffix identifies the 20-lead QFN (Quad Flat No-lead) package variant.
Typical applications include handheld consumer products, low-power wireless sensor nodes, battery-powered instrumentation, LED lighting controllers, HVAC damper actuators, and USB-to-UART bridges. The wide 4.2V-5.5V supply range also makes it compatible with regulated 5V USB rails and 4-cell NiMH battery packs.
Design tip: when migrating from the older PIC18F14K22 (industrial -40C to +85C) to the E/ML variant, no code change is required - the only differences are temperature range and package style. Ensure unused I/O pins are configured as outputs to minimize Sleep current below 100 nA.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing a single reference for BOM selection, sourcing, and circuit design validation.
Drop-in alternatives for PIC18F14K22-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 PIC18F14K22-E/ML (same form factor and footprint) — differing in Comparators, Package, ADC, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F14K22-I/ML
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC18F14K22T-E/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F13K22-E/ML
✅ Drop-In✓ In Stock
$1.34 / Unit
View Datasheet →PIC18F14K22-E/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit C-optimized RISC |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data Memory (RAM) | 512 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 48 MHz |
| Operating Voltage (Vdd) | 1.8 V to 5.5 V (E suffix: 4.2 V to 5.5 V) |
| Operating Temperature Range | -40 C to +125 C (Extended, E suffix) |
| I/O Pins | 17 |
| ADC | 12 channels, 10-bit |
| Comparators | 2 (rail-to-rail, selectable FVR) |
| Timers | 1 x 8-bit, 3 x 16-bit |
| CCP/ECCP Modules | 2 (1 ECCP + 1 CCP) |
| Communication Peripherals | EUSART, MSSP (SPI/I2C) |
| Internal Oscillator | 16 MHz precision, 4x PLL to 64 MHz |
| nanoWatt XLP Sleep Current | < 100 nA typical |
| Package | 20-pin QFN (4x4 mm, ML suffix) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life at <30 C / 85% RH) |
| RoHS Status | Compliant |
| AEC-Q100 Automotive Qualified | No (use PIC18F14K22T-I/MLVAO for VAO) |
PIC18F14K22-E/ML Pin Configuration
| Pin 1 | RA3/AN3/VREF+/C1IN+ — Bidirectional I/O / ADC input / positive voltage reference / comparator 1 input |
| Pin 2 | RA4/AN4/C2OUT/T0CKI — Bidirectional I/O / ADC input / comparator 2 output / Timer0 clock input |
| Pin 3 | RA5/AN5/MCLR/VPP — Bidirectional I/O / ADC input / Master Clear (reset) / programming voltage |
| Pin 4 | RA6/OSC2/CLKO — Bidirectional I/O / crystal oscillator output / clock output |
| Pin 5 | RA7/OSC1/CLKI — Bidirectional I/O / crystal oscillator input / clock input |
| Pin 6 | Vss — Ground reference |
| Pin 7 | RA0/AN0/C1IN-/ICSPDAT — Bidirectional I/O / ADC input / comparator 1 inverting input / ICSP data |
| Pin 8 | RA1/AN1/C1IN+/ICSPCLK — Bidirectional I/O / ADC input / comparator 1 non-inverting input / ICSP clock |
| Pin 9 | RA2/AN2/VREF-/CVREF — Bidirectional I/O / ADC input / negative voltage reference / comparator Vref output |
| Pin 10 | RC0/PWM1/CCP2/T3CKI — Bidirectional I/O / PWM output / CCP2 input/output / Timer3 clock input |
| Pin 11 | RC1/PWM2/CCP1 — Bidirectional I/O / PWM output / CCP1 input/output |
| Pin 12 | RC2/AN6/P1A/C2IN+ — Bidirectional I/O / ADC input / PWM enhanced output / comparator 2 input |
| Pin 13 | RC3/AN7/P1B/C2IN- — Bidirectional I/O / ADC input / PWM enhanced output / comparator 2 input |
| Pin 14 | RC4/SDA/SDI — Bidirectional I/O / I2C data / SPI data in |
| Pin 15 | RC5/SDO — Bidirectional I/O / SPI data out |
| Pin 16 | RC6/TX/CK/AN8 — Bidirectional I/O / EUSART TX / EUSART clock / ADC input |
| Pin 17 | RC7/RX/DT/AN9 — Bidirectional I/O / EUSART RX / EUSART data / ADC input |
| Pin 18 | RB4/AN10/SDI/SDA — Bidirectional I/O / ADC input / SPI data in / I2C data |
| Pin 19 | RB5/AN11/RX/DT — Bidirectional I/O / ADC input / EUSART RX / EUSART data |
| Pin 20 | Vdd — Positive supply voltage (4.2V to 5.5V) |
Typical Applications
PIC18F14K22-E/ML is suitable for 7 applications: Battery-Powered Sensor Node, USB-to-UART Bridge Adapter, HVAC Damper / Valve Actuator, LED Lighting Controller, Industrial Sensor Transmitter (4-20 mA), Home Appliance Control Board, Automotive LIN Bus Node (Non-Automotive Grade Caveat).
Battery-Powered Sensor Node
The PIC18F14K22-E/ML is well suited for battery-powered wireless sensor nodes because its nanoWatt XLP Sleep current drops below 100 nA typical, and its integrated 16 MHz precision oscillator eliminates two external crystal pins. With 12 channels of 10-bit ADC and 17 I/O, a single MCU can scan multiple analog sensors, drive an SPI-connected radio, and wake only on interrupt or WDT. Code fits comfortably in 16 KB Flash when using MPLAB XC8 in PRO mode; RAM supports modest 802.15.4 or LoRa stack buffers. Compared to a discrete analog + sleep timer solution, this MCU consolidates the analog front end, timing, and protocol stack into one 4x4 mm part, shrinking PCB area by 50% or more.
Recommended
USB-to-UART Bridge Adapter
The PIC18F14K22-E/ML can serve as a low-cost USB-to-UART bridge when paired with an external USB transceiver, using its integrated EUSART for serial communication up to 115.2 kbaud and MSSP for SPI/I2C bridging. The 48 MHz CPU and 16 MIPS throughput handle USB polling and protocol overhead in firmware when paired with the Microchip USB stack. Note this part lacks native USB hardware; designers seeking single-chip USB should migrate to PIC18F14K50 or use an MCP2200/MCP2221 bridge IC alongside the 14K22 for a true BOM-friendly USB-CDC design.
Recommended
HVAC Damper / Valve Actuator
The PIC18F14K22-E/ML drives HVAC damper and valve actuators using its ECCP module for PWM-controlled brushless DC or brushed DC motors, while dual rail-to-rail comparators handle current sensing and zero-cross detection. The Extended -40C to +125C temperature grade survives under-hood and rooftop unit environments without derating. Integrated FVR (Fixed Voltage Reference) stabilizes ADC measurements of thermistor inputs against supply variation, eliminating an external reference zener. The 17 I/O pins accommodate multiple limit switches, encoder feedback, and a triac optocoupler gate drive on a single MCU footprint.
Recommended
LED Lighting Controller
The PIC18F14K22-E/ML is widely deployed in addressable LED strip and architectural lighting controllers, where its ECCP module generates multi-channel PWM at frequencies up to 125 kHz without CPU overhead. The MSSP peripheral drives WS2812 / APA102 LED data lines via SPI or bit-banged DMA-style firmware, and 17 I/O pins support RGBW + clock + data for multi-strip deployments. nanoWatt XLP Sleep drops standby power below 50 uW when lighting is off, satisfying Energy Star standby requirements. The Extended temperature grade also tolerates enclosed luminaire thermal rise up to 85 C ambient.
Recommended
Industrial Sensor Transmitter (4-20 mA)
The PIC18F14K22-E/ML forms the core of a 4-20 mA current-loop sensor transmitter, where its 10-bit ADC reads bridge or thermistor sensors and its ECCP module + op-amp loop generates the loop current. nanoWatt XLP Sleep modes extend battery life in wireless HART or ISA100.11a transmitters between transmissions. The Extended -40C to +125C grade supports outdoor or process-plant installations without thermal protection, and the 20-pin QFN footprint fits inside standard DIN-B head mount enclosures. RS-485 communication is added via an external MAX485 transceiver on the EUSART.
Recommended
Home Appliance Control Board
The PIC18F14K22-E/ML is used in white-goods control boards (washing machines, dishwashers, microwave ovens) where it handles user keypad scanning, triac-driven AC load switching, and serial communication to inverter boards. The dual rail-to-rail comparators monitor motor overcurrent and zero-cross events without external analog ICs, and 17 I/O pins drive 7-segment displays via the MSSP-driven SPI shift register chain. nanoWatt XLP Sleep keeps standby power below 1 W for Energy Star compliance, while the -40C to +125C Extended grade survives kitchen thermal cycling.
Recommended
Automotive LIN Bus Node (Non-Automotive Grade Caveat)
The PIC18F14K22-E/ML implements LIN bus slave nodes in automotive body and comfort applications such as window lifters, mirror adjusters, and seat controllers, using the integrated EUSART as the LIN physical interface plus an external MCP2021 transceiver. Designers should note that this E/ML variant is NOT AEC-Q100 qualified; for production automotive designs, use the PIC18F14K22LIN-E/SS or PIC18F14K22T-I/MLVAO (VAO automotive qualified) variant instead. The 16 MIPS CPU performance supports LIN 2.x and SAE J2602 protocol stacks in firmware, and the Extended temperature grade matches under-hood thermal requirements.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F14K22-E/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F14K22-I/ML | PIC18F14K22T-E/ML | PIC18F13K22-E/ML |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin QFN (4x4 mm) | 20-pin QFN (4x4 mm) - same | 20-pin QFN (4x4 mm) - same | 20-pin QFN (4x4 mm) - same |
| Flash Memory | 16 KB | 16 KB | 16 KB | 8 KB (-50%) |
| RAM | 512 bytes | 512 bytes | 512 bytes | 256 bytes (-50%) |
| Max CPU Frequency | 48 MHz (64 MHz @ 3V with PLL) | 48 MHz (64 MHz @ 3V with PLL) | 48 MHz (64 MHz @ 3V with PLL) | 48 MHz (64 MHz @ 3V with PLL) |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +125C (Extended) |
| Operating Voltage | 4.2V to 5.5V | 1.8V to 5.5V (wider range) | 4.2V to 5.5V | 4.2V to 5.5V |
| I/O Pins | 17 | 17 | 17 | 17 |
| ADC Channels | 12 x 10-bit | 12 x 10-bit | 12 x 10-bit | 11 x 10-bit |
Key Differentiators
- Extended temperature range for harsh environments (vs PIC18F14K22-I/ML)
- Full 16 KB Flash memory available (vs PIC18F13K22-E/ML)
- 512 bytes RAM for protocol stacks (vs PIC18F13K22-E/ML)
Design Notes
Estimated: at Vdd=5V, 48 MHz CPU, and all peripherals active, the PIC18F14K22-E/ML consumes approximately 10-12 mA from the datasheet DC characteristics. A 100 nF ceramic decoupling capacitor within 5 mm of Vdd (pin 20) is mandatory, with a bulk 10 uF tantalum or ceramic on the same supply rail. For battery-powered Sleep operation, configure all unused I/O as outputs (logic low) and disable the ADC, comparators, and FVR before executing the SLEEP instruction to achieve < 100 nA Sleep current per the nanoWatt XLP specification.
The 20-pin QFN (4x4 mm) ML package has a junction-to-ambient thermal resistance of approximately 43 C/W on a 1 oz 4-layer JEDEC test PCB. Estimated: at the maximum 12 mA active current and 5.5 V supply, dissipation is roughly 66 mW, yielding a self-heating rise of only ~3 C above ambient, so no heatsink is required. However, soldering the exposed thermal pad (EP) of the QFN to a 1 square inch copper pour is mandatory to achieve the rated thermal resistance and prevent PCB lift during reflow.
The QFN-20 package requires careful PCB land pattern design. Use the Microchip recommended QFN 4x4 mm land pattern with 0.5 mm pitch and 0.25 mm pads, with the central exposed pad (EP) tied to Vss. NSMD (non-solder mask defined) pads are recommended for better solder joint reliability. Place the ICSP connector footprint (5-pin or 6-pin RJ-12) on the board edge for programming access, and route ICSPDAT (RA0) and ICSPCLK (RA1) away from switching signals to avoid in-circuit programming errors.
Common pitfalls: (1) The PIC18F14K22-E/ML E/ML suffix variant operates only at 4.2V to 5.5V; attempting 3.3V operation on E suffix is out of range - use the I suffix or PIC18LF14K22 for 3.3V. (2) MCLR (RA5) must be pulled high via a 10 kohm resistor for normal operation; floating MCLR causes unpredictable resets. (3) Configuration bits must be set correctly before code execution - failure to configure FOSC, WDTE, and LVP bits can brick the device. (4) The MSSP module conflicts with the EUSART on shared pins in some configurations - consult pinout diagrams before assigning peripherals.
For SPI communication above 4 MHz, route SCK/SDO/SDI as a matched-length bus with a 100 ohm source termination on the master SDO to suppress ringing on long traces (>50 mm). The MSSP peripheral supports SPI modes 0-3 at up to Fosc/4 = 12 MHz at 48 MHz CPU clock, but signal integrity typically limits reliable SPI to about 8 MHz without impedance control. Place a 100 ohm resistor in series with SCK at the master end if ringing is observed on the slave SDI input.
Compliance Information
RoHS and REACH compliant per Microchip product page. Lead-free QFN package. NOT AEC-Q100 qualified; for automotive applications use PIC18F14K22T-I/MLVAO (VAO automotive qualified) or PIC18F14K22LIN-E/SS variants.
