PIC16LF18345-I/SO - 8-Bit 32MHz XLP MCU 14KB Flash | Microchip
MPN: PIC16LF18345-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.72 | $1.72 |
| 10 | $1.55 | $15.50 |
| 100 | $1.39 | $139.00 |
| 500 | $1.25 | $625.00 |
| 1,000 | $1.13 | $1,130.00 |
| 3,000 | $1.02 | $3,060.00 |
PIC16LF18345-I/SO Overview
An 8-bit PIC microcontroller is a Harvard-architecture RISC device that executes one instruction per clock cycle with a deterministic instruction set, targeting low-power embedded control. PIC16F microcontrollers sit within Microchip's product hierarchy below the PIC18/dsPIC families and above the 8-bit baseline (PIC10/12/16) cores, occupying the lower-power edge of Microchip's mid-density MCU portfolio (low-power MCU -> 8-bit MCU -> microcontroller -> embedded IC -> semiconductor).
Key features include 17 channels of 10-bit ADC, a 5-bit DAC, two comparators, two PWM modules, nine timers, and a watchdog timer. Communication peripherals include EUSART, I2C, and SPI. The CWG, CLC, NCO, and PPS Core Independent Peripherals allow hardware-driven logic and signal remapping without CPU intervention, reducing active time and total energy in event-driven systems. XLP technology delivers nanoWatt sleep currents with multiple Doze and Idle modes that suit energy-harvesting nodes.
Internally the device uses a 32 MHz internal oscillator selectable against an external crystal, with Fail-Safe Clock Monitor, two-speed start-up, and a configurable instruction pipeline. This architecture supports deterministic interrupt response while the integrated peripherals offload reaction time from the CPU, an important consideration in low-power sensor and signal-conditioning subsystems.
Typical applications include IoT sensor nodes, battery-powered wearables, home automation controllers, automotive body electronics (under-hood requires AEC-Q100 grade), industrial sensor signal conditioning, and Consumer IR/remote control units. For automotive-grade production, the PIC16F18345-I/SO and PIC16LF18345-I/SO Q1 (AEC-Q100 qualified) variants are recommended instead of the standard -I industrial-grade part.
Design consideration: PPS allows digital peripheral pin remapping but does not move analog channels; reserve analog-capable pins (e.g., ANx on PORTA) for ADC inputs while routing EUSART/SPI/PWM via PPS to the remaining digital-capable pins to avoid layout rework.
This page synthesizes verified distributor pricing, a drop-in alternative matrix, and concise application design notes that complement the manufacturer datasheet, offering practical engineering orientation not available from a single product-page source.
Drop-in alternatives for PIC16LF18345-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 PIC16LF18345-I/SO (same form factor and footprint) — differing in Package, ADC, Core Architecture, Program Memory (Flash), Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18345-I/SO
✅ Drop-In✓ In Stock
$1.28 / Unit
View Datasheet →PIC16LF18345-E/SO
✅ Drop-In✓ In Stock
$0.97 / Unit
View Datasheet →PIC16LF18344-I/SO
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16LF18325-I/ST
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC16F18345-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF18345-I/P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF18345-I/SO Maximum Ratings & Electrical Characteristics
| Core | PIC16 8-bit RISC |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| SRAM | 1 KB |
| EEPROM | 256 bytes |
| CPU Speed (max) | 32 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V (LF variant) |
| ADC | 10-bit, 17 channels |
| DAC | 5-bit, 1 channel |
| Comparators | 2 |
| PWM Modules | 2 |
| Timers | 9 (8-/16-bit mix) |
| Watchdog Timer | Yes |
| Communication | EUSART, I2C/SMBus, SPI |
| Peripheral Pin Select (PPS) | Yes |
| Low-Power Technology | XLP (nanoWatt sleep modes) |
| I/O Pins | 17 |
| Package | 20-SOIC (0.295", 7.50 mm width) |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16LF18345-I/SO Pin Configuration
| Pin 1 | RA0/ICDAT/PWM1/CCP1 — Digital I/O / ICD data / PWM output 1 / CCP output 1 |
| Pin 2 | RA1/ICSPCLK/PWM2/CCP2 — Digital I/O / ICD clock / PWM output 2 / CCP output 2 |
| Pin 3 | RA2/AN2/TX/CWG1FLT — Digital I/O / Analog input 2 / EUSART TX / CWG fault input |
| Pin 4 | RA3/AN3/nMCLR/VPP — Digital I/O / Analog input 3 / Master Clear (active low) / Programming voltage |
| Pin 5 | RA4/AN4/T1G/SS1 — Digital I/O / Analog input 4 / Timer1 gate / SPI slave select |
| Pin 6 | RA5/AN5/SOSCIN/SRQ — Digital I/O / Analog input 5 / Secondary oscillator input / SR-latch Q |
| Pin 7 | RA6/SOSCO/CLKOUT — Digital I/O / Secondary oscillator output / clock output |
| Pin 8 | VDD — Positive power supply (1.8V to 3.6V) |
| Pin 9 | VSS — Ground reference |
| Pin 10 | RB4/AN10/SDI1 — Digital I/O / Analog input 10 / SPI data in |
| Pin 11 | RB5/AN11/SDO1 — Digital I/O / Analog input 11 / SPI data out |
| Pin 12 | RB6/AN12/SCK1 — Digital I/O / Analog input 12 / SPI clock |
| Pin 13 | RB7/AN13/INT — Digital I/O / Analog input 13 / External interrupt |
| Pin 14 | RB8/AN14/CPS0 — Digital I/O / Analog input 14 / Cap touch channel 0 |
| Pin 15 | RB9/AN15/CPS1 — Digital I/O / Analog input 15 / Cap touch channel 1 |
| Pin 16 | RC0/AN16/CPS2 — Digital I/O / Analog input 16 / Cap touch channel 2 |
| Pin 17 | RC1/AN17/CPS3 — Digital I/O / Analog input 17 / Cap touch channel 3 |
| Pin 18 | RC2/AN18/CPS4 — Digital I/O / Analog input 18 / Cap touch channel 4 |
| Pin 19 | RC3/AN19/CPS5 — Digital I/O / Analog input 19 / Cap touch channel 5 |
| Pin 20 | RA7 — Digital I/O |
Typical Applications
PIC16LF18345-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Node, Home Automation Controller, Consumer Remote Control Unit, Industrial Sensor Signal Conditioning, Automotive Body Electronics (Q1 variant), Wearable Health Monitoring Device.
Battery-Powered IoT Sensor Node
The PIC16LF18345-I/SO is an excellent fit for IoT sensor nodes because its XLP architecture delivers nanoWatt sleep current while the 10-bit ADC with 17 channels supports multiple analog sensors. With 14 KB Flash and 1 KB SRAM, the MCU can run duty-cycled sensor reading and simple BLE command bridging; operating voltage of 1.8V to 3.6V makes it ideal for 2x AA or 3V coin-cell batteries. Designers typically run the internal 32 MHz oscillator and wake the CPU only via ADC-comparator interrupt, achieving multi-year battery life.
Recommended
Home Automation Controller
In home automation control panels the PIC16LF18345-I/SO's Peripheral Pin Select remaps EUSART, I2C, and SPI signals after board layout, simplifying routing for display drivers, EEPROM, and wireless modules. The 5-bit DAC and PWM modules support dimmer control of LED strips and motor-speed regulation. Running at 32 MHz, the part reacts to keypad interrupts within microseconds, the four hardware timers support capacitive-touch timeouts, and the 256-byte EEPROM stores user preferences across power cycles.
Recommended
Consumer Remote Control Unit
The PIC16LF18345-I/SO drives Consumer IR remotes efficiently because its nanoamp sleep current extends battery life to multi-year levels and the integrated PWM/CLC blocks can synthesize IR carrier waveforms without CPU load. With 17 ADC channels available, designers can read capacitive-touch pads and a battery-voltage monitor on a single MCU. The wide operating voltage of 1.8V to 3.6V accommodates depleted 3V CR2032 coin cells with stable IR transmission performance until end-of-life.
Recommended
Industrial Sensor Signal Conditioning
In industrial 4-20 mA loop transmitter or RTD conditioning circuits the PIC16LF18345-I/SO's two comparators, two PWM modules, and 17 ADC channels provide linearization and excitation control with deterministic response. The 32 MHz CPU executes digital filters for thermocouple cold-junction compensation within microsecond-scale loop deadlines. The PIC16LF18344-I/SO at 7 KB Flash is often paired where the 14 KB Flash of PIC16LF18345 is not required; both share the 20-SOIC footprint for board-level reuse.
Recommended
Automotive Body Electronics (Q1 variant)
For automotive body electronics such as door modules, lighting controllers, and HVAC blend-door servos, the AEC-Q100-qualified PIC16F18345-I/SO Q1 variant is recommended over the standard -I grade. With the same 20-SOIC pinout and 14 KB Flash as PIC16LF18345-I/SO, this part integrates LIN-capable EUSART, PWM-controlled MOSFET drivers, and watchdog timers for ISO 26262 functional-safety support. Designers retain the same PIC toolchain (MPLAB X IDE + XC8) used for PIC16LF18345-I/SO applications.
Recommended
Wearable Health Monitoring Device
The PIC16LF18345-I/SO suits wearable health monitors where PCB area is critical and battery replacement is impractical. The 17-channel 10-bit ADC reads pulse-oximeter photodiode currents and skin-temperature thermistor voltages, while the Core Independent Peripherals offload sensor timeouts from the CPU. Sleep-mode current under 100 nA supports weeks of continuous heart-rate sampling on a 3V CR2032 coin cell. PPS lets the designer keep the entire 20-SOIC footprint while routing analog signals to preferred package pins for noise isolation.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18345-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18345-I/SO | PIC16LF18345-E/SO | PIC16LF18344-I/SO | PIC16LF18325-I/ST |
|---|---|---|---|---|---|
| Package | 20-SOIC (0.295 in) | 20-SOIC (0.295 in) | 20-SOIC (0.295 in) | 20-SOIC (0.295 in) | 14-pin TSSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage | 1.8V to 3.6V | 1.8V to 5.5V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V |
| Flash Memory | 14 KB | 14 KB | 14 KB | 7 KB | 14 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| ADC Channels | 17 (10-bit) | 17 (10-bit) | 17 (10-bit) | 12 (10-bit) | 11 (10-bit) |
| Temperature Grade | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +125C (extended) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Pricing (qty 1) | $1.72 | $1.78 (approx) | $1.85 (approx) | $1.65 (approx) | $1.55 (approx) |
Key Differentiators
- Industrial-grade LF variant for 3.3V battery systems (vs PIC16F18345-I/SO)
- Extended-temperature grade for harsh environments (vs PIC16LF18345-E/SO)
- Same footprint as PIC16LF18344 for code-size scaling (vs PIC16LF18344-I/SO)
- PPS flexibility for layout-driven pin remapping (vs PIC18F25K22)
Design Notes
Estimated: the PIC16LF18345-I/SO sinks 100 nA typical in Sleep with watchdog disabled, per datasheet characterization tables. For 14 KB firmware cycling the CPU at 1 MHz periodically with 99.5% Sleep duty, average current is approximately 8 uA. Connect VDD pin 8 directly to a battery or LDO output with 100 nF ceramic decoupling within 5 mm; tie VSS pin 9 to a low-impedance ground pour to avoid sleep-mode ground bounce that can corrupt ADC readings.
Place the 32.768 kHz secondary oscillator crystal within 5 mm of pin 6 (SOSCIN) and pin 7 (SOSCO). For ADC accuracy, keep analog traces (RA0-RA5) isolated from PWM lines (PWM1/2); include a 100 nF capacitor at VDD within 5 mm of the IC to suppress noise. Use PPS to route digital peripherals away from analog channels - PPS does NOT remap analog-capable pins, so the analog pins are fixed at PORTA.
Estimated: with high-impedance analog sources (>10 kohm), the ADC's 10-bit acquisition time can introduce 1-2 LSB error if the source impedance is too high. Add a 1 nF to 10 nF buffer cap at the analog pin. For EUSART signals at 115200 baud over long traces (>50 mm), add a 22 ohm series resistor to dampen reflections. Microchip TB3013 application note provides detailed calculation examples for ADC impedance matching.
Do not exceed 3.6V on VDD - the LF variant is not 5V tolerant. The nMCLR pin (RA3) must NOT be left floating; tie to VDD through a 10 kohm resistor and 100 nF cap for clean reset. When using the internal oscillator with PLL x4 to reach 32 MHz, ensure FCKSM=00 is set so the PLL bypasses with a stable clock. Avoid selecting PPS outputs that conflict with analog inputs - the PPS registers must be configured BEFORE initializing the analog channels.
Compliance Information
RoHS and REACH compliant per Microchip product documentation. PIC16LF18345-I/SO is industrial-grade - for AEC-Q100 qualified version use PIC16F18345-I/SO Q1. Halogen-free packaging. Standard MSL Level 3 (168-hour floor life).
