PIC18LF23K22T-I/SS - 8KB Flash 8-bit XLP MCU 28-SSOP | Microchip
MPN: PIC18LF23K22T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.89 | $189.00 |
| 500 | $1.65 | $825.00 |
| 1,000 | $1.42 | $1,420.00 |
PIC18LF23K22T-I/SS Overview
An 8-bit PIC microcontroller is a Harvard-architecture RISC device built around a 16-bit instruction word and an 8-bit data path, providing deterministic interrupt latency, single-cycle multiplication, and a mature MPLAB X IDE toolchain. The PIC18 family sits in Microchip's mid-range performance tier above PIC16 and below dsPIC/PIC32, and is widely used where developers need more peripherals and code space than entry-level MCUs without paying for 32-bit cores. The 'nanoWatt XLP' label refers to Microchip's low-power process enhancements that allow sleep currents in the nanoamp range.
Key features of the PIC18LF23K22T-I/SS include: 8KB Flash, 768 bytes SRAM, 256 bytes EEPROM, up to 25 I/O pins, a 10-bit ADC with up to 17 channels, two analog comparators, two CCP modules, one ECCP module, two EUSART modules, one MSSP (SPI/I2C) module, and four 8-bit timers plus three 16-bit timers. The industrial temperature grade (-40C to +85C) supports harsh-environment deployment, and the XLP technology enables typical sleep currents under 100 nA with RTC running.
Typical applications for this device include battery-powered IoT sensor nodes, low-power wireless remotes, wearable health monitors, smart meters, and consumer electronics where extended battery life outweighs the need for higher MIPS. The wide 1.8V to 3.6V operating range allows direct connection to single-cell Li-ion or two-AA battery stacks without additional regulation.
When designing with this MCU, ensure the supply decoupling network follows the manufacturer reference design with a 100 nF ceramic capacitor close to VDD. The MCLR pin should use the recommended 10 kohm pull-up to VDD for reliable reset behavior. Industrial temperature parts such as the '-I' variant must be selected for any design that will operate below 0C or above +70C.
Drop-in alternatives for PIC18LF23K22T-I/SS — 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 PIC18LF23K22T-I/SS (same form factor and footprint) — differing in ADC, Program Memory (Flash), Timers, Mounting Type, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF23K22-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F23K22T-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F23K22-I/SS
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC18LF23K22T-E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF25K22T-I/SS
✅ Drop-In✓ In Stock
$1.66 / Unit
View Datasheet →PIC18LF14K22T-I/SS
✅ Drop-In✓ In Stock
$1.67 / Unit
View Datasheet →PIC18LF23K22T-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 8 KB (4K x 16) |
| Data Memory (SRAM) | 768 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 64 MHz |
| Supply Voltage Range | 1.8 V to 3.6 V (LF variant) |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| I/O Pins | Up to 25 |
| ADC | 10-bit, up to 17 channels |
| Analog Comparators | 2 |
| CCP / ECCP Modules | 2 CCP + 1 ECCP |
| EUSART Modules | 2 |
| MSSP (SPI / I2C) | 1 |
| Timers | 4 x 8-bit + 3 x 16-bit |
| Package | 28-pin SSOP (5.30 mm body) |
| Mounting Type | Surface Mount |
| Packaging | Tape and Reel (T suffix) |
| Low-Power Technology | nanoWatt XLP |
| MSL Level | MSL1 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
PIC18LF23K22T-I/SS Pin Configuration
| Pin 1 | MCLR/VPP/RA3 — Master Clear reset / programming voltage / PORTA bit 3 |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Pin 5 | RA3 — PORTA bit 3 (shared with MCLR) |
| Pin 6 | RA4 — PORTA bit 4 |
| Pin 7 | RA5/AN4 — PORTA bit 5 / analog input 4 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7/OSC1 — PORTA bit 7 / oscillator input |
| Pin 10 | RA6/OSC2 — PORTA bit 6 / oscillator output |
| Pin 11 | RC0 — PORTC bit 0 |
| Pin 12 | RC1 — PORTC bit 1 |
| Pin 13 | RC2 — PORTC bit 2 |
| Pin 14 | RC3 — PORTC bit 3 |
| Pin 15 | RC4 — PORTC bit 4 |
| Pin 16 | RC5 — PORTC bit 5 |
| Pin 17 | RC6 — PORTC bit 6 |
| Pin 18 | RC7 — PORTC bit 7 |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0 — PORTB bit 0 |
| Pin 22 | RB1 — PORTB bit 1 |
| Pin 23 | RB2 — PORTB bit 2 |
| Pin 24 | RB3 — PORTB bit 3 |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5 — PORTB bit 5 |
| Pin 27 | RB6 — PORTB bit 6 / ICSPCLK |
| Pin 28 | RB7 — PORTB bit 7 / ICSPDAT |
Typical Applications
PIC18LF23K22T-I/SS is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Wearable Health Monitors, Smart Meter Endpoints, Low-Power Wireless Remote Controls, Industrial Sensor Transmitters, Consumer Electronics User Interface Controllers.
Battery-Powered IoT Sensor Nodes
The PIC18LF23K22T-I/SS is well suited to wireless IoT sensor nodes where multi-year battery life is required. Its nanoWatt XLP technology delivers typical sleep currents below 100 nA with the RTCC running, and the 1.8V to 3.6V operating range matches the discharge curve of two AA alkaline cells (3.2 V nominal dropping to 1.8 V cutoff) without external regulation. The 64 MHz CPU provides ample throughput for sensor reading and AES-128 encryption at low duty cycle, while the 25 I/O pins support multiple analog and digital sensors via the 10-bit ADC and MSSP I2C/SPI bus.
Recommended
Wearable Health Monitors
Wearable fitness and medical monitoring devices benefit from the PIC18LF23K22T-I/SS combination of compact 28-SSOP package (5.30 mm body), sub-100 nA sleep current, and integrated 10-bit ADC for direct sensor interface. The device can wake from sleep on IOC interrupts from heart-rate sensor signals, take measurements, transmit over an EUSART-connected BLE module, and return to sleep within microseconds. Its industrial temperature range supports body-temperature operation, and the 1.8V operation allows direct coin-cell (CR2032) use without boost conversion, extending battery life by 30-40% over 3.3V-only MCUs.
Recommended
Smart Meter Endpoints
Smart utility meters (water, gas, electric) demand 10-20 year battery life and robust industrial temperature operation, both delivered by the PIC18LF23K22T-I/SS. Its 256-byte EEPROM supports non-volatile pulse counting and tamper logging without external memory, while the 768-byte SRAM holds metering buffers between transmissions. The two EUSART modules allow simultaneous connection to a wireless MBus or LoRa modem and a wired diagnostic port. The 1.8V minimum supply voltage supports 2xAA lithium thionyl chloride (Li-SOCl2) battery packs with 3.6V nominal and 1.8V end-of-life.
Recommended
Low-Power Wireless Remote Controls
Consumer remote controls for TVs, AV receivers, and IoT smart-home hubs achieve 5+ year battery life using the PIC18LF23K22T-I/SS. Its XLP sleep current under 100 nA means an alkaline AAA cell (1200 mAh) can power the remote for over a decade of typical use. The 25 I/O pins support matrix keypads up to 5x5, while the integrated EUSART or MSSP interfaces directly to sub-GHz or IR transmitters. The wide operating voltage tolerates cell voltage droop down to 1.8V without firmware glitches, and the 64 MHz CPU executes button-debounce and protocol encoding in microseconds.
Recommended
Industrial Sensor Transmitters
Industrial 4-20 mA sensor transmitters and field instruments use the PIC18LF23K22T-I/SS for its industrial -40C to +85C operating range and 1.8V to 3.6V supply tolerance that accepts loop-powered supply voltages from 12V down-regulated. The 10-bit ADC with up to 17 channels reads multiple process variables, while the ECCP module generates precision PWM for HART or analog output stages. The 8KB Flash supports MODBUS, HART, or proprietary protocol stacks, and 256 bytes EEPROM stores calibration coefficients that survive power cycles without external memory.
Recommended
Consumer Electronics User Interface Controllers
The PIC18LF23K22T-I/SS serves as a user-interface MCU in appliances, AV equipment, and white goods where it handles button input, LED or LCD display driving, and rotary encoder reading. The ECCP module drives LED backlights with hardware PWM, while the MSSP I2C bus connects to the main processor for command exchange. Its 8KB Flash holds complex UI state machines and debounce logic, and the 1.8V to 3.6V range allows direct 3.3V system-rail connection without level shifters. Sleep current under 1 uA in standby mode contributes to Energy Star compliance for always-on appliances.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF23K22T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF23K22-I/SS | PIC18F23K22T-I/SS | PIC18F23K22-I/SS | PIC18LF23K22T-E/SS | PIC18LF25K22T-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) |
| Program Memory (Flash) | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 32 KB |
| Data Memory (SRAM) | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 1536 bytes |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Maximum CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (Extended) | -40 C to +85 C |
| Packaging Format | Tape & Reel | Tube | Tape & Reel | Tube | Tape & Reel | Tape & Reel |
Key Differentiators
- Lowest operating voltage in 28-SSOP PIC18 K22 family (vs PIC18F23K22T-I/SS)
- Highest memory density in 28-SSOP K22 family with same voltage range (vs PIC18LF14K22T-I/SS)
- Industrial temperature grade matches price of extended grade competitors (vs PIC18LF23K22T-E/SS)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as physically possible to each VDD pin (pins 20 and the adjacent supply pin), with a second 10 uF bulk capacitor within 1 cm to handle switching transients when peripherals wake from sleep. According to the Microchip PIC18(L)F2X/4XK22 datasheet, incorrect decoupling can increase sleep current by 10x or cause POR failures during wake events. For battery designs, use X7R or X5R dielectric ceramic capacitors rather than Y5V to maintain capacitance at low VDD.
The MCLR pin (pin 1) must use a 10 kohm pull-up to VDD with a 100 nF cap to ground for noise immunity, or 1 kohm for harsh industrial environments. Floating MCLR is the most common cause of erratic PIC18 reset behavior in field-deployed units. The CONFIG words must explicitly enable the watchdog timer and disable the low-voltage programming (LVP) fuse if using high-voltage ICSP, otherwise pin RB5 becomes a load on the application circuit.
Keep traces to the 32.768 kHz crystal (when used for RTCC) under 5 mm and symmetric; otherwise oscillator startup time will increase and RTCC accuracy degrade. The crystal load capacitors should match the crystal's specified load capacitance (typically 6-12 pF) including PCB parasitic capacitance. For designs using the internal 16 MHz HFINTOSC, enable the PLL only when needed since each MHz of additional clock increases active current by approximately 100 uA at 3.3V.
Estimated: At 64 MHz and 3.3V, the PIC18LF23K22 active current is approximately 9 mA, yielding about 30 mW dissipation - well within the SSOP-28 thermal envelope of 100 C/W theta_JA. No thermal management is required for normal operation. However, in continuous-conversion ADC mode with all peripherals active, supply current can rise to 15 mA, requiring consideration of battery voltage drop at high duty cycle.
Compliance Information
RoHS compliant per Microchip product declaration. Industrial temperature grade - not AEC-Q100 qualified; choose PIC18LF23K22T-E/SS for extended-grade applications.
