PIC18F14K22T-I/SO - 8-bit XLP MCU 16KB Flash 64MHz SOIC-20 | Microchip
MPN: PIC18F14K22T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.65 | $1,650.00 |
| 3,000 | $1.48 | $4,440.00 |
PIC18F14K22T-I/SO Overview
What is an 8-bit microcontroller? An 8-bit MCU is a single-chip processor whose internal datapath, registers and ALU operate on 8-bit words, providing deterministic real-time response, low power consumption and straightforward peripheral integration for embedded control. Within the Microchip portfolio, the PIC18F14K22 belongs to the XLP (eXtreme Low Power) sub-family of the PIC18 high-performance architecture, which targets battery-powered and energy-harvesting designs that demand sub-microamp sleep currents and a C-compiler-friendly instruction set.
Key features of the PIC18F14K22 include nanoWatt XLP technology with sleep currents as low as 20 nA typical, four brown-out-reset selectable trip points, an internal 16 MHz oscillator that can be multiplied via PLL to 64 MHz, an on-board 8 MHz HFINTOSC with 2% accuracy, and a wide 1.8 V to 5.5 V operating voltage range that simplifies multi-rail designs. The device also supports self-programmability of its Flash, a hardware RTCC, and an enhanced USART with auto-baud detection.
Architecturally, the PIC18F14K22 uses a 16-bit modified Harvard structure with separate program and data buses, a hardware multiplier, and a vectored interrupt controller. The peripheral set is prioritized for low-pin-count applications: enough timers and serial channels for sensor hubs, motor control, or display driving, but with a small footprint that fits 14- and 20-pin SOIC/PDIP layouts without sacrificing analog performance.
Typical applications include battery-powered sensor nodes, USB-to-UART bridges using the EUSART, simple motor control with PWM, low-end consumer appliances, HVAC remote controls, and industrial sensor conditioning. The wide voltage range and nanoWatt XLP modes make it well suited for IoT edge devices powered by coin cells or energy harvesters.
When designing with the PIC18F14K22T-I/SO, observe the SOIC-20 wide-body land pattern (pin pitch 1.27 mm / 50 mil) and ensure the trace to the MCLR pin includes the recommended pull-up. Decouple VDD with 100 nF plus 10 uF bulk capacitance placed within 5 mm of the supply pins to keep ADC accuracy stable.
This page synthesizes distributor pricing, drop-in SOIC-20 alternatives, and practical design notes that complement the official Microchip datasheet.
Drop-in alternatives for PIC18F14K22T-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 PIC18F14K22T-I/SO (same form factor and footprint) — differing in Package, Timers, Core Architecture, ADC, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F14K22-I/SO
✅ Drop-In✓ In Stock
$0.96 / Unit
View Datasheet →PIC18F14K22-E/SO
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC18F14K22-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.95 / Unit
View Datasheet →PIC18F14K22T-I/ML
✅ Drop-In✓ In Stock
$1.58 / Unit
View Datasheet →PIC18F13K22T-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.05 / Unit
View Datasheet →PIC18F14K22T-I/SO Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC18 (nanoWatt XLP) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data RAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| I/O Pins | 17 |
| ADC | 10-bit, up to 12 channels |
| PWM Channels | Up to 4 (CCP/ECCP) |
| Timers | 1 x 16-bit, 2 x 8-bit |
| Communication Interfaces | EUSART, MSSP (SPI/I2C) |
| Package | 20-pin SOIC (SO) wide body, 1.27 mm pitch |
| Operating Temperature | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life at <30C/85% RH) |
| Lead-Free / RoHS | Yes / Compliant |
| Quality Standard | AEC-Q100 Grade 3 capable (automotive screened variants available) |
PIC18F14K22T-I/SO Pin Configuration
| Pin 1 | RA3/AN3/VREF+ — Bidirectional I/O / analog input / ADC positive reference |
| Pin 2 | RA2/AN2 — Bidirectional I/O / analog input 2 |
| Pin 3 | RA1/AN1 — Bidirectional I/O / analog input 1 |
| Pin 4 | RA0/AN0 — Bidirectional I/O / analog input 0 |
| 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 | VSS — Ground reference |
| Pin 8 | VDD — Positive supply (1.8 V to 5.5 V) |
| Pin 9 | RB4/AN10 — Bidirectional I/O / analog input 10 / IOC |
| Pin 10 | RB5/AN11 — Bidirectional I/O / analog input 11 / IOC |
| Pin 11 | RB6/PGC — Bidirectional I/O / ICSP clock |
| Pin 12 | RB7/PGD — Bidirectional I/O / ICSP data |
| Pin 13 | RB0/INT0/AN12 — Bidirectional I/O / external interrupt 0 / analog input 12 |
| Pin 14 | RB1/INT1 — Bidirectional I/O / external interrupt 1 |
| Pin 15 | RB2/INT2/AN8 — Bidirectional I/O / external interrupt 2 / analog input 8 |
| Pin 16 | RB3/AN9/CCP2 — Bidirectional I/O / analog input 9 / Capture-Compare-PWM 2 |
| Pin 17 | RC7/RX/DT — Bidirectional I/O / EUSART RX / data line |
| Pin 18 | RC6/TX/CK — Bidirectional I/O / EUSART TX / clock line |
| Pin 19 | RC5/CCP1 — Bidirectional I/O / Capture-Compare-PWM 1 |
| Pin 20 | RC4/SDA/SDI/SDA — Bidirectional I/O / I2C data / SPI data in |
Typical Applications
PIC18F14K22T-I/SO is suitable for 6 applications: Battery-Powered Sensor Nodes, USB-to-UART Bridge (without USB peripheral), Low-End Motor Control (PWM + Feedback), Consumer Appliance Control (HVAC / White Goods), Industrial Sensor Conditioning, Display Driver for Low-Resolution OLED / LCD.
Battery-Powered Sensor Nodes
The PIC18F14K22T-I/SO's nanoWatt XLP sleep current below 20 nA and 1.8 V to 5.5 V supply range make it a strong fit for battery-powered sensor nodes that run for years on a coin cell. With 16 KB Flash it can host Bluetooth/BLE host stack fragments, Modbus RTU, or custom sensor fusion firmware. The 10-bit ADC with 12 channels handles multiple temperature, humidity and voltage measurements without external multiplexers, and the two CCP/PWM modules drive low-power indicator LEDs or haptic feedback. At 3 V supply and a 1 Hz wake rate, typical application notes show multi-year lifetime on a CR2032 battery.
Recommended
USB-to-UART Bridge (without USB peripheral)
Although the PIC18F14K22 lacks native USB, its two EUSART modules and 16 KB Flash are well suited to UART-based bridges, protocol converters and Modbus gateways. Placed on a daughter board, the MCU translates RS-232/485 traffic to UART-TTL, buffers packets, and forwards them via I2C to a host processor. The 16 MIPS throughput at 64 MHz easily handles 115200 baud with software flow control. Using the AEC-Q100 grade -E/SO variant extends the bridge into industrial and automotive fleets.
Recommended
Low-End Motor Control (PWM + Feedback)
The PIC18F14K22's two CCP/ECCP modules provide up to 4 PWM channels with complementary outputs and programmable dead-band, sufficient for brushed DC, small BLDC or stepper motor control at low current. The 64 MHz CPU runs PID loops at 100 us loop time without taxing the 16 KB Flash budget, and the 16-bit timer with Capture/Compare captures Hall-sensor feedback precisely. With the -40C to +85C range it tolerates under-hood or industrial cabinet environments.
Recommended
Consumer Appliance Control (HVAC / White Goods)
With 17 I/O pins, four PWM channels and a 12-channel 10-bit ADC, the PIC18F14K22T-I/SO can replace discrete timer boards in white-goods appliances. It reads thermistor inputs, drives triac-gated heater loads through optocouplers, controls valve solenoids via MOSFETs and lights a 7-segment display through SPI. The wide 1.8-5.5 V range handles rectified mains and battery backup without an extra regulator. Microchip's AEC-Q100 grade -E/SO variant covers the -40C to +125C range demanded by under-hood and oven-control appliances.
Recommended
Industrial Sensor Conditioning
The PIC18F14K22T-I/SO's 10-bit ADC with 12 channels handles 4-20 mA or 0-10 V sensor inputs through external op-amp scaling, while the EUSART + RS-485 transceiver delivers long-distance noise-immune communication. Its 16 KB Flash comfortably holds Modbus RTU slave firmware with calibration tables, and the 256-byte EEPROM stores sensor-specific calibration constants. Industrial customers benefit from the extended temperature PIC18F14K22-E/SO variant covering -40C to +125C.
Recommended
Display Driver for Low-Resolution OLED / LCD
Pairing the PIC18F14K22's MSSP (SPI/I2C) with a small OLED or character LCD module yields an inexpensive HMI for appliances and instruments. The 16 MIPS throughput lets the MCU drive 128x64 OLEDs over SPI at 30+ fps, including partial updates for low-power operation. Sleep currents under 1 uA (with peripherals disabled) keep battery-powered displays alive for months. The PIC18F14K22T-I/SO's 20-pin SOIC footprint drops onto countless existing SSD1306 / HD44780 evaluation boards.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F14K22T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F14K22-I/SO | PIC18F14K22-E/SO | PIC18F14K22T-I/ML | PIC18F13K22T-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SOIC (SO) | 20-pin SOIC (SO) - same | 20-pin SOIC (SO) - same | 20-pin QFN (ML) - different footprint | 20-pin SOIC (SO) - same |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB (-50%) |
| RAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 256 bytes (-50%) |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Maximum CPU Speed | 64 MHz (16 MIPS) | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C |
| ADC | 10-bit, 12 channels | 10-bit, 12 channels | 10-bit, 12 channels | 10-bit, 11 channels | 10-bit, 12 channels |
| AEC-Q100 Grade | Capable (Industrial) | Capable (Industrial) | Grade 0 / Grade 1 qualified | Capable (Industrial) | Not qualified |
Key Differentiators
- Tape-and-reel carrier on the SOIC-20 wide-body footprint for SMT lines (vs PIC18F14K22-I/SO)
- Extended temperature and AEC-Q100 qualification (vs PIC18F14K22-E/SO)
- Industrial temperature grade in QFN-20 package (vs PIC18F14K22T-I/ML)
- Half-Flash sibling for cost-down designs (vs PIC18F13K22T-I/SO)
Design Notes
Decouple VDD (pin 8) with a 100 nF ceramic plus a 10 uF bulk capacitor placed within 5 mm of the supply pin. The PIC18F14K22 is rated at 1.8 V to 5.5 V; brown-out-reset thresholds can be software-selected from BORV1:BORV0. For USB-less battery applications disable the unused EUSART and MSSP peripherals in firmware to drop the active current floor by 30-50 uA.
Estimated: at 64 MHz and 5.5 V supply in SOIC-20 (theta_JA approximately 80 C/W on a 4-layer JEDEC test board), continuous operation consumes about 12 mW (VDD x IDD) and produces a 1 C junction rise. The SOIC-20 has no thermal concerns under normal industrial use; however, mount thermal vias under the SOIC pad if driving all I/O pins continuously at 20 mA.
Reserve the SOIC-20 wide-body land pattern (JEDEC MS-013) with 1.27 mm pitch pads. Route the crystal traces to RA6/OSC2 and RA7/OSC1 within 5 mm and guard them with a grounded copper pour if the design is RF-sensitive. Place ICSP pull-up on MCLR (pin 4) with 10 kohm to VDD; route PGC/PGD to pins 11 and 12 with stubs <25 mm to avoid debug-timing violations.
Avoid connecting RA0/RA1/RA2/RA3 to analog inputs above VDD or below VSS even briefly - the absolute maximum ratings are VSS-0.3 V to VDD+0.3 V. When migrating from PIC18F13K22 to PIC18F14K22 code, verify that the smaller Flash (8 KB) on the '13' device does not cause code overflow. The MSSP module does NOT auto-switch between I2C and SPI - explicitly configure SCL/SDA vs SCK/MOSI in firmware.
Compliance Information
RoHS compliant per Microchip product page. The -I/SO industrial grade is not AEC-Q100 qualified; the -E/SO sibling variant carries AEC-Q100 Grade 1 qualification. Lead-free / Halogen-free per Microchip MPN suffix convention (SO wide-body).
