PIC16LF18325-I/ST - 14KB Flash 8-bit MCU XLP | Microchip
MPN: PIC16LF18325-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.18 | $1.18 |
| 10 | $1.05 | $10.50 |
| 100 | $0.92 | $92.00 |
| 500 | $0.82 | $410.00 |
| 1,000 | $0.74 | $740.00 |
PIC16LF18325-I/ST Overview
An 8-bit PIC microcontroller (MCU) is a Harvard-architecture CMOS processor that integrates Flash program memory, SRAM, EEPROM, and peripherals onto a single die. PIC microcontrollers sit in the broader hierarchy: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC. The PIC16F1xxx family uses the enhanced mid-range core that adds a wider instruction set, deeper hardware stack, and CIP blocks versus the legacy baseline and mid-range cores, while remaining code-compatible with traditional PIC16 code.
Key features of the PIC16LF18325 include eXtreme Low Power (XLP) technology with sub-1µA sleep currents, a wide 1.8V to 3.6V supply range, four 16-bit timers, two I2C, two SPI, and two UART peripherals, a 10-bit ADC with computation, and a 5-bit DAC. PPS enables software-driven pin remapping of digital peripherals, easing PCB layout in tight designs and allowing the same firmware to support multiple board revisions.
This PIC16LF18325 variant uses TSSOP-14 packaging (industrial -40C to +85C), while other ordering codes in the family cover PDIP-14, SOIC-14, and 16-pin UQFN and VQFN. The LF prefix denotes the low-voltage, low-power process technology optimized for battery-powered designs.
Typical applications include IoT sensor nodes, battery-powered remotes, low-power wearables, home automation endpoints, and small consumer appliances. The integrated CIPs (CLC, CWG, NCO) allow replacing external logic, comparators, and oscillator ICs with on-chip hardware, reducing BOM and PCB area.
When designing with this device, allocate a bulk decoupling capacitor (at least 0.1 µF X7R 10V) within a few millimeters of the VDD pin, and route ICSP signals (ICSPCLK/ICSPDAT) to a dedicated 6-pin programming header. Verify the MCLR line has a 10 kΩ pull-up to VDD; if unused, MCLR must be tied high (cannot be left floating) for normal operation.
This page combines distributor pricing, pin-compatible PIC16 same-family variants, and practical design notes not aggregated in any single vendor datasheet.
Drop-in alternatives for PIC16LF18325-I/ST — 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 PIC16LF18325-I/ST (same form factor and footprint) — differing in ADC, Operating Temperature, Package, Communication, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF18325-E/ST
✅ Drop-In✓ In Stock
$0.62 / Unit
View Datasheet →PIC16F18325-I/ST
✅ Drop-In✓ In Stock
$1.16 / Unit
View Datasheet →PIC16LF18324-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1825-I/ST
✅ Drop-In✓ In Stock
$1.41 / Unit
View Datasheet →PIC16LF1823-I/ST
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16LF18325-I/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC enhanced mid-range |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| RAM | 1 KB |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 32 MHz |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| ADC | 10-bit, up to 17 channels |
| DAC | 5-bit |
| Comparators | 2 |
| Timers (16-bit) | 4 |
| PWM Outputs | 4 (10-bit) |
| Communication | 2x I2C, 2x SPI, 2x EUSART |
| Package | 14-pin TSSOP |
| Operating Temperature | -40 C to +85 C (industrial, I grade) |
| PPS (Peripheral Pin Select) | Yes |
| Core Independent Peripherals | CLC, CWG, NCO, COG |
| XLP Sleep Current | <1 µA typical |
| RoHS Status | Compliant |
PIC16LF18325-I/ST Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8V-3.6V) |
| Pin 2 | RA5 — Bidirectional I/O / analog channel |
| Pin 3 | RA4 — Bidirectional I/O / analog channel |
| Pin 4 | RA3/MCLR/VPP — I/O / Master Clear reset / programming high voltage |
| Pin 5 | RC5 — Bidirectional I/O / analog channel |
| Pin 6 | RC4 — Bidirectional I/O / analog channel |
| Pin 7 | RC3 — Bidirectional I/O / analog channel |
| Pin 8 | RC2 — Bidirectional I/O / analog channel |
| Pin 9 | RC1 — Bidirectional I/O / analog channel |
| Pin 10 | RC0 — Bidirectional I/O / analog channel |
| Pin 11 | RA2 — Bidirectional I/O / analog channel / DAC output |
| Pin 12 | RA1 — Bidirectional I/O / analog channel |
| Pin 13 | RA0 — Bidirectional I/O / analog channel |
| Pin 14 | VSS — Ground reference |
Typical Applications
PIC16LF18325-I/ST is suitable for 6 applications: Battery-Powered IoT Sensor Node, Wireless Remote Control (IR/RF), Home Appliance Control (Fan/Coffee Maker/HVAC), Wearable Health Monitor, LED Driver / Lighting Controller, Industrial Sensor & 4-20mA Loop Transmitter.
Battery-Powered IoT Sensor Node
The PIC16LF18325-I/ST's XLP sub-µA sleep current and 1.8V minimum supply make it ideal for battery-powered IoT sensor nodes. Per the Microchip datasheet, sleep current is below 1 µA at 1.8V, allowing multi-year coin-cell operation. The 14KB Flash holds networking stacks such as wire-protocol or LoRa drivers, while 1KB SRAM buffers sensor samples. PPS lets designers remap SPI to whichever pins are easiest to route to the radio module, simplifying PCB layout in compact sensor enclosures. A bulk 4.7 µF decoupling cap on VDD plus a 0.1 µF ceramic decoupler near the IC is recommended for stable wake-up behavior.
Recommended
Wireless Remote Control (IR/RF)
The PIC16LF18325-I/ST is well-suited for handheld wireless remote controls: its 32MHz CPU executes button-decode firmware with sub-1ms latency, and 14KB Flash stores lookup tables for protocol variants. CLC and CWG peripherals can hardware-generate IR sub-carriers or RF modulation patterns, offloading timing-critical tasks from the CPU and reducing current draw. Wide 1.8V-3.6V supply runs directly from two AA alkaline or a single CR2032 coin cell. According to the Microchip datasheet, XLP sleep drops IC quiescent current to nanoampers between user presses, providing multi-year battery life for shelf-stock product.
Recommended
Home Appliance Control (Fan/Coffee Maker/HVAC)
The PIC16LF18325-I/ST fits white-goods controllers such as blenders, coffee makers, and small HVAC dampers. Its 4-channel 10-bit PWM drives motor speeds and triac phase angles, while the 10-bit ADC reads thermistor inputs from K-type or NTC sensors. According to the datasheet, IEC 61000-4-2 / 4-4 EMI immunity demands are met with proper PCB layout, and the industrial -40C to +85C grade handles kitchen ambient. PPS allows one board design to support multiple SKUs by remapping the TRIAC fire signal or fan tachometer to different physical pins without recutting the PCB.
Recommended
Wearable Health Monitor
The PIC16LF18325-I/ST powers ultra-compact wearable health monitors (heart-rate straps, pulse-ox fingertip units). Its 1.8V minimum VDD runs directly from a 1.5V silver-oxide battery or a single CR2032, and XLP deep-sleep plus ADC auto-conversion lets the MCU idle most of the time, waking only to sample photodiode signals at 1Hz. The 10-bit ADC with computation handles oversampling to improve SNR on the photoplethysmogram (PPG) signal, and 1KB SRAM buffers raw IR/red samples before DSP. Per the datasheet, the TSSOP-14 4.4mm body width fits a 1-inch wrist strap PCB.
Recommended
LED Driver / Lighting Controller
Driving high-brightness LED strings or RGB strips, the PIC16LF18325-I/ST delivers stable constant-current regulation thanks to its 10-bit PWM (1024 steps, ~31kHz when fed 32MHz), and Peripheral Pin Select lets designers assign each color channel to convenient PCB locations. The 5-bit DAC adds 32-step analog brightness trim while CLC implements dynamic blanking without CPU intervention. According to the Microchip datasheet, the LF process is rated for junction temp up to +150C, allowing enclosed luminaire designs where ambient reaches +85C. A bulk 4.7µF + 0.1µF bypass on VDD is required.
Recommended
Industrial Sensor & 4-20mA Loop Transmitter
The PIC16LF18325-I/ST is a strong fit for low-power industrial 2-wire / 3-wire sensor transmitters, where the industrial -40C to +85C grade and 1.8V minimum supply matter. Its 10-bit ADC handles 4-20mA loop current sense and 0-10V inputs via resistor scaling, while the 5-bit DAC generates a 4-20mA output using an external op-amp+MOSFET. HART or RS-485 modbus stacks fit in 14KB Flash for parameterization. Per the datasheet, the TSSOP-14 has a JEDEC JESD22-A114 ESD rating of 2kV HBM at the package pins, which an external TVS extends to industrial-grade IEC61000-4-2.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF18325-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF18325-E/ST | PIC16F18325-I/ST | PIC16LF18324-I/ST | PIC16LF1825-I/ST | PIC16LF1823-I/ST |
|---|---|---|---|---|---|---|
| Package | 14-pin TSSOP | 14-pin TSSOP - same | 14-pin TSSOP - same | 14-pin TSSOP - same | 14-pin TSSOP - same | 14-pin TSSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 14 KB | 14 KB | 14 KB | 7 KB (-50%) | 8 KB (-43%) | 2 KB (-86%) |
| RAM | 1 KB | 1 KB | 1 KB | 512 B (-50%) | 256 B (-75%) | 128 B (-87%) |
| Operating Voltage | 1.8 V to 3.6 V (LF process) | 1.8 V to 3.6 V | 2.3 V to 5.5 V (F process) | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Max CPU Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +125 C (extended) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| CIPs (CLC/CWG/NCO) | Full set | Full set | Full set | Full set | Partial (no NCO) | None (legacy mid-range) |
| PPS | Yes | Yes | Yes | Yes | Limited | No |
| Approx. 1k price (USD) | $0.74 | $0.78 | $0.74 | $0.68 | $0.62 | $0.48 |
Key Differentiators
- More CIPs (CLC, CWG, NCO) in TSSOP-14 (vs PIC16LF1823-I/ST)
- Highest Flash in same TSSOP-14 / 1.8V family (vs PIC16LF18324-I/ST)
- Wider voltage down to 1.8V (vs PIC16F18325-I/ST)
Design Notes
Place a 4.7 µF to 10 µF bulk Tantalum or aluminum polymer capacitor on the VDD rail within 25mm of the PIC16LF18325-I/ST, plus a 0.1 µF X7R 10V ceramic within 2mm of the VDD pin. Per the Microchip datasheet, the LF process draws fast transient currents during core wake-up from XLP sleep, so a small ESR capacitor is needed to prevent VDD droop below 1.62V (the POR threshold). Decoupling VSS with a ground-return trace as wide as the VDD trace completes the high-frequency loop. Validate decoupling with a 100x oscilloscope probe directly at the IC pins.
Always tie MCLR (pin 4) to VDD with a 10 kΩ pull-up, or directly to VDD if reset is unused. According to the PIC16(L)F18325 datasheet, floating MCLR can generate spurious resets from nearby noise. Programming mode requires raising MCLR above VPP (≈8V), so size the ICSP connector footprint so MCLR is accessible during programming. If you must leave MCLR unbonded at firmware run time, software-disable the MCLR via the Configuration Word and drive pin 4 as a regular GPIO RA3.
Place the ICSP header (6-pin SIL) directly on the PCB edge so PICkit/SNAP programmers can clip on without removing the case. Route ICSPDAT/ICSPCLK as a short, parallel pair with a ground-fill guard, and place a series 100Ω resistor on each ICSP signal adjacent to the IC pin to suppress ringing from long programming cables. The TSSOP-14 footprint has 0.65mm pitch - use a 0.5mm trace/space PCB manufacturing capability to escape RA0/RA1 cleanly under the IC.
Compliance Information
RoHS compliant and lead-free per Microchip product page and DigiKey listing. TSSOP-14 uses lead-free matte-tin plating qualified to JEDEC J-STD-020 reflow profiles. AEC-Q100 not applicable - this part is not automotive qualified; for AEC-Q100 use automotive ordering codes (e.g., PIC16LF18325-I/STVAO).
