PIC18LF14K22T-I/SO - 8-bit 64MHz 16KB Flash MCU 20-SOIC | Microchip
MPN: PIC18LF14K22T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.76 | $17.60 |
| 100 | $1.42 | $142.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $0.98 | $980.00 |
PIC18LF14K22T-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM and EEPROM), peripheral interfaces, and I/O pins. The PIC18 architecture is an 8-bit C-compiler-friendly RISC core designed by Microchip for embedded control. As part of the broader taxonomy, this part sits at: PIC18 microcontroller -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The LF (low-voltage, low-power) subfamily extends the core with Microchip's nanoWatt XLP technology, enabling deep sleep currents as low as 20 nA typical.
Key specifications include 16KB Flash program memory, 512 bytes of SRAM, 256 bytes of EEPROM, a 10-bit ADC with up to 12 channels, two 8-bit timers plus three 16-bit timers, two CCP modules, an Enhanced USART, an MSSP (SPI/I2C) module, and up to 17 digital I/O pins. The device operates from 1.8V to 3.6V with typical active current under 5 mA at 4 MHz, making it ideal for battery-powered applications.
The device uses Microchip's enhanced Harvard architecture with a 16-bit instruction word and an 8-bit data path. Its internal 16 MHz/64 MHz oscillator with PLL provides flexible clock options without external components. Hardware multiply and a C-optimized instruction set deliver throughput suitable for sensor processing and basic protocol handling.
Typical applications include IoT sensor nodes, battery-powered wireless transmitters (RF remotes, beacons), wearable health monitors, low-cost motor control loops, USB-to-UART bridges, and consumer appliance user interfaces. The wide operating voltage range makes it suited to single-cell Li-ion or 2xAA/AAA battery packs.
When designing with this part, place decoupling capacitors (100 nF and 10 uF) within 5 mm of VDD/VCAP pins. Use the internal 16 MHz HFINTOSC for cost-sensitive designs or an external crystal when timing accuracy is critical for UART or USB. The MCLR pin requires a 10 kohm pull-up for reliable operation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, with all values cross-checked against the 388-page Microchip PIC18LF14K22 datasheet.
Drop-in alternatives for PIC18LF14K22T-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 PIC18LF14K22T-I/SO (same form factor and footprint) — differing in Package, Timers, ADC, Operating Temperature, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF14K22-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F14K22-I/SO
✅ Drop-In✓ In Stock
$0.96 / Unit
View Datasheet →PIC18LF14K22-I/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.62 / Unit
View Datasheet →PIC18LF14K22T-I/ML
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC18LF13K22T-I/SO
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC18LF14K22T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit RISC, C-optimized) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data Memory (SRAM) | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 64 MHz |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 17 |
| ADC | 10-bit, up to 12 channels |
| Timers | 2 x 8-bit, 3 x 16-bit |
| Capture/Compare/PWM | 2 CCP modules |
| Communication | 1 x EUSART, 1 x MSSP (SPI/I2C) |
| Package | 20-SOIC (7.50 mm body width) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Low-Power Technology | nanoWatt XLP |
| Sleep Current (typical) | ~20 nA (WDT disabled) |
| RoHS Status | Compliant |
PIC18LF14K22T-I/SO Pin Configuration
| Pin 1 | RA3/AN3/VREF+/C1IN+/T0CKI — Bidirectional I/O, analog input, voltage reference, comparator input, or Timer0 clock |
| Pin 2 | RA4/AN4/C1OUT/T1G/SS/HLVDIN — Bidirectional I/O, analog input, comparator output, Timer1 gate, SPI slave select, HV interrupt |
| Pin 3 | RA5/AN5/C2IN+/DACOUT/VCAP — Bidirectional I/O, analog input, comparator input, DAC output, core voltage decoupling |
| Pin 4 | MCLR/VPP/RE3 — Master Clear reset (active low), programming voltage, or digital input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RA0/AN0/C12IN0-/ULPWU — Bidirectional I/O, analog input, comparator input, ultra-low-power wake-up |
| Pin 7 | RA1/AN1/C12IN1-/VBG — Bidirectional I/O, analog input, comparator input, bandgap reference output |
| Pin 8 | RA2/AN2/C2IN+/DACOUT — Bidirectional I/O, analog input, comparator input, DAC output |
| Pin 9 | VDD — Positive power supply (1.8V to 3.6V) |
| Pin 10 | RB7/ICSPDAT — Bidirectional I/O, ICSP data line |
| Pin 11 | RB6/ICSPCLK — Bidirectional I/O, ICSP clock line |
| Pin 12 | RB5/AN11/CCP3/T3CKI — Bidirectional I/O, analog input, CCP3 output, Timer3 clock |
| Pin 13 | RB4/AN10/SDI/SDA — Bidirectional I/O, analog input, SPI data in, I2C data |
| Pin 14 | RC7/AN9/SDO/RX/DT — Bidirectional I/O, analog input, SPI data out, EUSART RX |
| Pin 15 | RC6/AN8/TX/CK — Bidirectional I/O, analog input, EUSART TX, EUSART clock |
| Pin 16 | RC5/AN7/CCP2 — Bidirectional I/O, analog input, CCP2 output |
| Pin 17 | RC4/AN6/C2OUT — Bidirectional I/O, analog input, comparator 2 output |
| Pin 18 | RC3/AN5/CCP1/SCK/SCL — Bidirectional I/O, analog input, CCP1 output, I2C/SPI clock |
| Pin 19 | RC2/AN6/CCP1/P1A — Bidirectional I/O, analog input, CCP1 output, PWM output |
| Pin 20 | RC1/AN7/CCP2 — Bidirectional I/O, analog input, CCP2 output |
Typical Applications
PIC18LF14K22T-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Consumer Appliance User Interfaces, Low-Cost Motor Control Loops, USB-to-UART Bridge Adapters, Wearable Health Monitors, Wireless Remote Controls (RF/IR).
Battery-Powered IoT Sensor Nodes
The PIC18LF14K22T-I/SO is engineered for battery-powered IoT sensor endpoints where 1.8-3.6V operation aligns directly with single-cell Li-ion (3.0-4.2V regulated down) or 2xAA alkaline chemistry. Its nanoWatt XLP sleep mode draws ~20 nA typical with WDT disabled, enabling multi-year coin-cell operation. The 64 MHz core handles periodic sensor reads and AES-style processing before radio transmission, while 16 KB Flash accommodates over-the-air (OTA) bootloader and Zigbee/BLE stack glue. Engineers pair it with sensors like the Bosch BME280 or TI TMP117 over I2C, and with sub-GHz transceivers via the EUSART. The 10-bit ADC serves analog sensors directly, eliminating an external ADC chip.
Recommended
Consumer Appliance User Interfaces
The PIC18LF14K22T-I/SO fits mid-range consumer appliance HMI panels needing 16 KB of firmware for menu state machines, button debouncing, and LED/PWM backlight control. Its 2x CCP modules generate PWM for dimming indicators or driving small BLDC fans, while the EUSART talks to a host main controller. Operating from 1.8-3.6V it interfaces directly to 3.3V LCDs and capacitive touch ICs without level shifters. With 17 I/O pins it drives 4x4 keypads plus RGB status LEDs simultaneously. Industrial -40C to +85C grade supports refrigerator, oven, and washing-machine environments per IEC 60721-3 household appliance class.
Recommended
Low-Cost Motor Control Loops
For small brushed-DC or stepper motor control in toys, fans, and small pumps, the PIC18LF14K22T-I/SO offers two CCP modules that generate PWM at up to 64 MHz peripheral clock. Its 10-bit ADC reads back EMF or current shunt signals for closed-loop speed control, while the EUSART delivers diagnostics to a host system. The 1.8-3.6V operation suits 2xAA/2xAAA battery motor packs, and nanoWatt XLP idle lets the MCU shut down between motion commands for extended battery life. Designers pair it with TI DRV8870 or Onsemi AM4964 H-bridge drivers via the MCU's GPIO for direction and PWM for speed.
Recommended
USB-to-UART Bridge Adapters
The PIC18LF14K22T-I/SO can serve as a simple USB-to-UART protocol converter for debug cables and field-programmer accessories when paired with an external USB-UART bridge IC such as MCP2200 or FT231X. Its EUSART handles baud rates up to 1 Mbaud with hardware flow control, and 16 KB Flash accommodates HID bootloader plus command parser. The 1.8-3.6V operation matches 3.3V USB-UART ICs directly without level translation, and the 20-SOIC package fits small adapter PCBs. Sleep modes below 1 uA let the bridge auto-suspend when the host USB port drops power.
Recommended
Wearable Health Monitors
For wrist-worn fitness bands and wearable health monitors, the PIC18LF14K22T-I/SO combines deep-sleep nanoWatt XLP current (~20 nA) with a 64 MHz core that wakes instantly for heart-rate sensor reads. The 1.8-3.6V VDD range matches a single CR2032 coin cell directly without boost converter, extending battery life beyond two years for periodic-logging use cases. The 10-bit ADC reads optical PPG sensor photodiode current, while I2C communicates with accelerometers and BLE modules. With only 17 I/O pins it leaves room for vibration motor, button input, and RGB status LED in a compact wearable design.
Recommended
Wireless Remote Controls (RF/IR)
The PIC18LF14K22T-I/SO is a strong fit for RF and IR remote controls where battery life dominates the BOM. Its 1.8-3.6V operation drives a 3V CR2032 or 2xAAA pack directly, and nanoWatt XLP sleep current of ~20 nA allows years of standby before user button press. The 64 MHz core executes encrypted rolling-code protocols (KeeLoq or AES) before RF transmission via a companion TI CC1101 or Silabs Si4010 sub-GHz transmitter. The 10-bit ADC reads battery voltage for low-battery warnings over the EUSART or PWM-driven status LED, while 16 KB Flash supports complex keymaps and multi-protocol support in universal remotes.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF14K22T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF14K22-I/SO | PIC18F14K22-I/SO | PIC18LF14K22-I/P | PIC18LF14K22T-I/ML | PIC18LF13K22T-I/SO |
|---|---|---|---|---|---|---|
| Package | 20-SOIC | 20-SOIC - same | 20-SOIC - same | 20-PDIP - through-hole | 20-QFN - SMD | 20-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB (-50%) |
| SRAM | 512 B | 512 B | 512 B | 512 B | 512 B | 256 B (-50%) |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Maximum CPU Clock | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| I/O Pins | 17 | 17 | 17 | 17 | 17 | 17 |
| Packaging | Tape & Reel | Tube/Tray | Tube/Tray | Tube | Tape & Reel | Tape & Reel |
Key Differentiators
- Wide 1.8-3.6V operating voltage enables direct battery connection (vs PIC18F14K22-I/SO)
- 20-SOIC package is hand-solderable and breadboard-friendly versus QFN (vs PIC18LF14K22T-I/ML)
- 16 KB Flash provides 100% more code space than cost-down variant (vs PIC18LF13K22T-I/SO)
Design Notes
Decouple VDD (pin 9) with a 100 nF ceramic capacitor within 5 mm of the pin, plus a bulk 10 uF tantalum or aluminum polymer cap near the MCU for switching transient suppression. For battery designs drawing less than 50 mA peak, a single 10 uF ceramic on VDD typically suffices. Place VCAP (pin 3) capacitor per datasheet - typically 1 uF to 10 uF ceramic with ESR below 1 ohm - the internal LDO regulator requires this for stable core voltage. Per Microchip PIC18LF14K22 datasheet (Document 40001357), insufficient VCAP capacitance causes erratic behavior or reset loops under high-frequency operation.
MCLR (pin 4) MUST be pulled high through a 10 kohm resistor to VDD; leaving it floating causes random resets or failed programming. If using ICSP (In-Circuit Serial Programming), use a diode-isolated MCLR circuit per Microchip development guidelines to prevent programmer voltage backfeeding into the application. Another common mistake: configuring RA3 as an analog input when it doubles as the VREF+ source - the ADC reference then drifts with load. Always use a separate analog reference pin if precision ADC readings are required.
Route the ICSP clock and data lines (RB6/RB7) away from high-frequency switching nodes; keep them short and avoid running parallel to motor driver outputs. Place the 20-SOIC on a single layer with a continuous ground plane underneath for thermal dissipation (the SOIC draws ~5 mA active at 4 MHz, ~20 mA at 64 MHz). Per Microchip layout guidelines, leave a copper keepout under the SOIC body but flood the area around pins 19/20 (VSS/VDD) with vias to the bottom ground/power plane. For mixed-signal designs, separate analog (RA/RC analog pins) and digital (RB/RC digital) ground returns and join them at a single star point near the MCU GND pin.
Estimated: at maximum operating frequency of 64 MHz and 3.6 V VDD, the PIC18LF14K22T-I/SO core consumes approximately 18 mA active current, dissipating roughly 65 mW of power. In the 20-SOIC package with typical theta_JA of 80 C/W on a standard 2-layer JEDEC test board, junction temperature rise above ambient is approximately 5.2 C - well within the -40 C to +85 C industrial range with substantial margin. For continuous 64 MHz operation at 85 C ambient, no heatsink is required. Per the Microchip PIC18LF14K22 datasheet, sleep mode leakage is typically 20 nA, enabling battery designs that draw less than 1 mA average.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial -40C to +85C temperature grade. Not AEC-Q100 qualified - for automotive applications, consider PIC18F variants with Q1 suffix or Microchip's PIC18F16Q41 automotive family.
