PIC18LF23K22-I/MV - 8-bit XLP MCU, 8KB Flash, 28-UQFN | Microchip
MPN: PIC18LF23K22-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.57 | $25.70 |
| 100 | $2.15 | $215.00 |
| 500 | $1.79 | $895.00 |
| 1,000 | $1.42 | $1,420.00 |
PIC18LF23K22-I/MV Overview
What is a microcontroller (MCU)? An MCU is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O onto one silicon die. The PIC18 family is Microchip's high-performance 8-bit architecture, positioned above the baseline PIC16 and PIC10/12/16 families and below the 16-bit dsPIC and 32-bit PIC32 families. Within the PIC18K sub-family, the 'K' parts target low-power and high-precision analog applications, the 'LF' suffix specifies the 1.8 V–3.6 V extended power range, and the 'F' (non-LF) variants are 5 V tolerant.
Key features of this part include a 12-bit ADC with up to 17 channels, mTouch™ capacitive touch support, multiple communication peripherals (I2C, SPI, EUSART), four 8-bit timer/counters and two CCP modules, plus a nanoWatt XLP power management unit with multiple idle and sleep modes. The device integrates a precision internal oscillator and operates across the industrial temperature range of -40 °C to +85 °C.
Architecturally, the PIC18LF23K22 uses an enhanced Harvard architecture with separate program and data buses, a 16-bit instruction word, and a hardware multiply/divide accelerator. Its 31-level hardware stack and 74 instructions provide deterministic interrupt response, while the peripheral pin-select (PPS) subsystem remaps digital peripherals to any I/O pin to simplify PCB routing on space-constrained boards.
Typical applications include battery-powered sensor nodes, low-power IoT edge devices, capacitive-touch user interfaces, small home appliances, and portable medical accessories where low sleep current, small UQFN footprint, and integrated analog peripherals are critical. The wide 1.8–3.6 V operating range allows direct connection to single-cell Li-ion or two-cell alkaline battery stacks.
A key design consideration: the 28-UQFN package has an exposed thermal pad that MUST be soldered to the PCB ground plane to meet thermal and mechanical reliability targets; for hand-prototyping or breadboard builds, choose the 28-SPDIP (PIC18LF23K22-I/SP) variant instead. The LF voltage range also requires careful verification of analog reference voltages—using a 5 V reference with a 3.3 V supply will damage the ADC.
This page synthesizes Microchip datasheet specifications, distributor pricing, drop-in alternative MPNs, and practical design notes not consolidated on the manufacturer product page.
Drop-in alternatives for PIC18LF23K22-I/MV — 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 PIC18LF23K22-I/MV (same form factor and footprint) — differing in Package, Operating Temperature, ADC, Program Memory (Flash), I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF23K22-I/ML
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC18LF23K22T-I/MV
✅ Drop-In✓ In Stock
$1.65 / Unit
View Datasheet →PIC18LF24K22-I/MV
✅ Drop-In✓ In Stock
$1.39 / Unit
View Datasheet →PIC18F23K22-I/MV
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →PIC18LF25K22-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF23K22-I/MV Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit (Enhanced Harvard) |
| Series | PIC® XLP™ 18K |
| Program Memory (Flash) | 8 KB (4K x 16) |
| RAM | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 64 MHz |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| Operating Temperature | -40 °C to +85 °C (Industrial) |
| Package | 28-UQFN (4x4 mm) - MV |
| Pin Count | 28 |
| ADC | 12-bit, up to 17 channels |
| Communication Peripherals | 1x EUSART, 1x I2C, 1x SPI |
| Timers | 4x 8-bit + 2x CCP |
| Touch Sensing | mTouch™ capacitive touch supported |
| Low-Power Technology | nanoWatt XLP™ (sleep current < 100 nA) |
| Mounting Type | Surface Mount |
PIC18LF23K22-I/MV Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O / analog input / CVref |
| Pin 2 | RA3 — Bidirectional I/O / analog input |
| Pin 3 | RA4 — Bidirectional I/O / analog input / T0CKI |
| Pin 4 | RA5 — Bidirectional I/O / analog input / SS |
| Pin 5 | VDD — Positive supply voltage |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RA7 — Bidirectional I/O / oscillator input |
| Pin 8 | RA6 — Bidirectional I/O / oscillator output |
| Pin 9 | RC0 — Bidirectional I/O / analog input / PWM |
| Pin 10 | RC1 — Bidirectional I/O / analog input / PWM |
| Pin 11 | RC2 — Bidirectional I/O / analog input / PWM |
| Pin 12 | RC3 — Bidirectional I/O / analog input / SPI SCK |
| Pin 13 | RC4 — Bidirectional I/O / analog input / SPI SDI |
| Pin 14 | RC5 — Bidirectional I/O / analog input / SPI SDO |
| Pin 15 | RC6 — Bidirectional I/O / TX/CK |
| Pin 16 | RC7 — Bidirectional I/O / RX/DT |
| Pin 17 | RB7 — Bidirectional I/O / I2C SDA |
| Pin 18 | RB6 — Bidirectional I/O / I2C SCL |
| Pin 19 | RB5 — Bidirectional I/O / PWM |
| Pin 20 | RB4 — Bidirectional I/O / PWM |
| Pin 21 | RB3 — Bidirectional I/O / CCP input/output |
| Pin 22 | RB2 — Bidirectional I/O / analog input |
| Pin 23 | RB1 — Bidirectional I/O / analog input / INT1 |
| Pin 24 | RB0 — Bidirectional I/O / analog input / INT0 |
| Pin 25 | RA1 — Bidirectional I/O / analog input / CVref- |
| Pin 26 | RA0 — Bidirectional I/O / analog input |
| Pin 27 | VSS — Ground (second pad) |
| Pin 28 | VDD — Positive supply (second pad) |
| Pin EP | EP — Exposed thermal pad - connect to VSS (GND) |
Typical Applications
PIC18LF23K22-I/MV is suitable for 6 applications: Battery-Powered IoT Sensor Node, Capacitive Touch User Interface, Portable Medical Accessories, Small Home Appliances, Industrial Sensor Transmitters, Remote Control and HMI Keypads.
Battery-Powered IoT Sensor Node
The PIC18LF23K22-I/MV is well-suited for battery-powered IoT sensor nodes thanks to its nanoWatt XLP technology delivering sub-100 nA deep sleep current and 1.8 V to 3.6 V operation compatible with single-cell Li-ion or two-AAA battery stacks. The integrated 12-bit ADC, EUSART, I2C, and SPI peripherals allow direct connection to temperature, humidity, and motion sensors without external glue logic. The 4x4 mm 28-UQFN footprint enables compact wearable and wireless sensor form factors.
Recommended
Capacitive Touch User Interface
The PIC18LF23K22-I/MV's mTouch™ capacitive touch peripheral and high-resolution 12-bit ADC make it a strong choice for capacitive touch buttons, sliders, and proximity sensors in home appliances and consumer electronics. Peripheral Pin Select (PPS) remaps touch channels to any I/O pin, simplifying PCB layout under tight mechanical constraints. The 28-UQFN 4x4 mm package fits behind thin overlays in space-constrained UI modules.
Recommended
Portable Medical Accessories
Low-power operation, industrial temperature range, and small footprint make the PIC18LF23K22-I/MV suitable for portable medical accessories such as glucose meters, pulse oximeters, and personal health monitors. The 12-bit ADC captures analog signals from biomedical sensors with sufficient resolution for vital-sign analysis. The wide 1.8 V to 3.6 V range supports direct single-cell Li-ion battery operation without boost converters.
Recommended
Small Home Appliances
Coffee makers, blenders, air purifiers, and other small home appliances benefit from the PIC18LF23K22-I/MV's combination of low cost, integrated peripherals, and robust 8-bit core. The PIC18 architecture's deterministic interrupt response and 31-level hardware stack ensure reliable real-time control of motors, heaters, and displays. The 28-UQFN package and 1.8 V minimum supply enable compact appliance PCBs with simple linear regulators.
Recommended
Industrial Sensor Transmitters
Industrial 4-20 mA sensor transmitters, RTD conditioners, and process control modules can leverage the PIC18LF23K22-I/MV's 12-bit ADC, 1.8-3.6 V operation, and industrial -40 °C to +85 °C temperature range. The device's nanoWatt XLP technology enables loop-powered transmitters that draw minimal current from the 4-20 mA loop. EUSART with LIN support simplifies integration into industrial sensor networks.
Recommended
Remote Control and HMI Keypads
Consumer remote controls, security keypads, and small HMI panels benefit from the PIC18LF23K22-I/MV's capacitive touch support, low sleep current for multi-year battery life, and small 28-UQFN footprint. The integrated EUSART supports IR transmission for remote control applications. The PIC18 instruction set and MPLAB X IDE toolchain accelerate firmware development and field-proven reliability.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF23K22-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF23K22-I/ML | PIC18LF23K22T-I/MV | PIC18LF24K22-I/MV | PIC18F23K22-I/MV | PIC18LF25K22-I/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-UQFN (4x4 mm) - MV | 28-QFN (6x6 mm) - ML | 28-UQFN (4x4 mm) - MV (same) | 28-UQFN (4x4 mm) - MV (same) | 28-UQFN (4x4 mm) - MV (same) | 40-pin (NOT 28-UQFN) |
| Flash Memory | 8 KB | 8 KB | 8 KB | 16 KB | 8 KB | 32 KB |
| RAM | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 2048 bytes |
| Operating Voltage | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 2.3 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) |
| Maximum CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Package Code | MV (UQFN-28 4x4) | ML (QFN-28 6x6) | MV (UQFN-28 4x4) | MV (UQFN-28 4x4) | MV (UQFN-28 4x4) | MV (40-pin variant) |
Key Differentiators
- Smallest package footprint in the PIC18F/LF23K22 family (vs PIC18LF23K22-I/ML)
- Low-voltage 1.8 V operation enables single-cell Li-ion use (vs PIC18F23K22-I/MV)
- nanoWatt XLP technology achieves sub-100 nA sleep current (vs PIC18LF25K22-I/MV)
Design Notes
Estimated: The 28-UQFN package has an exposed thermal pad (EP) that MUST be soldered to a ground plane on the PCB. Without proper soldering, mechanical reliability and thermal dissipation are compromised, and the device may fail during thermal cycling. Use a via array under the EP to connect to an internal ground plane; recommended via diameter is 0.2-0.3 mm with 0.5-0.8 mm pitch to allow solder wicking while preventing solder starvation.
Place a 100 nF decoupling capacitor as close as possible to each VDD pin and a single 10 µF bulk capacitor near the device. The PIC18LF23K22's nanoWatt XLP technology requires clean power to achieve the sub-100 nA deep-sleep current - noisy supplies can increase sleep current by orders of magnitude. For battery applications, use a low-Iq LDO such as MCP1700 (1.6 µA quiescent) to preserve battery life.
Do not exceed 3.6 V on VDD - the LF variant is NOT 5 V tolerant. Using the LF part on a 5 V rail will permanently damage the device; choose the PIC18F23K22-I/MV (2.3-5.5 V variant) instead. Also, ensure configuration bits (FOSC, WDTE, etc.) are correctly programmed before code execution; an unconfigured part will fail to start. Use MPLAB X IDE with the PICkit 5 or Snap debugger for safe configuration.
Keep analog inputs (AN0-ANx) short and away from switching signals to preserve ADC accuracy. The 12-bit ADC requires careful analog ground layout - a single-point star ground from the analog section to the digital ground near the MCU's VSS pin minimizes ground-loop noise. Place a 100 nF bypass capacitor at each AVdd pin if used.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade (-40 °C to +85 °C). Not AEC-Q100 qualified - use automotive-grade PIC18F variants for vehicle applications.
