PIC16F18325-I/ST - 8-Bit 32MHz 14KB Flash XLP MCU | Microchip
MPN: PIC16F18325-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.71 | $1.71 |
| 10 | $1.62 | $16.20 |
| 100 | $1.46 | $146.00 |
| 500 | $1.31 | $655.00 |
| 1,000 | $1.16 | $1,160.00 |
PIC16F18325-I/ST Overview
What is an 8-bit microcontroller? An 8-bit microcontroller is a single-chip computer that processes data in 8-bit units and integrates CPU, memory (Flash, SRAM, EEPROM), peripherals, and I/O on a single die. Within the broader taxonomy, the PIC16F18325 belongs to the PIC16 family -> 8-bit PIC microcontrollers -> Microchip MCU portfolio -> Microcontrollers -> Integrated Circuits -> Semiconductors. XLP variants add nanoWatt technology for battery-powered applications requiring deep sleep currents below 100 nA.
Key features include 12 high-current I/O pins (capable of source/sink 50 mA per pin), 10-bit ADC with up to 11 channels, 5-bit DAC, 2 comparators, 8-bit/10-bit PWMs, Capture/Compare/PWM (CCP), Configurable Logic Cells (CLC), Complementary Waveform Generator (CWG), and EUSART, I2C, SPI communication peripherals. PPS remaps digital peripheral outputs to any I/O pin, simplifying PCB layout in space-constrained designs.
The architecture uses a Harvard-based PIC16 core with a hardware multiplier and a 14-bit instruction word, executing most instructions in one instruction cycle. The 32 MHz internal oscillator provides 8 MIPS throughput, sufficient for sensor processing, motor control loops, and basic communication stacks without external clocking.
Typical applications include IoT sensor nodes, battery-powered wearables, LED lighting controllers, consumer appliances, and low-power remote controls. The wide operating voltage (1.8V-5.5V) and XLP modes suit coin-cell and lithium battery designs.
When designing with this part, place the decoupling capacitor (100 nF ceramic) as close as possible to VDD and ensure the ICSP programming pins (PGD/PGC) are accessible. Configure PPS only after locking the pins you need to remain fixed to avoid accidental remapping of debug interfaces.
Drop-in alternatives for PIC16F18325-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 PIC16F18325-I/ST (same form factor and footprint) — differing in ADC, Operating Temperature, Package, Communication Peripherals, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18325-E/ST
✅ Drop-In✓ In Stock
$0.98 / Unit
View Datasheet →PIC16F18324-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18325T-I/ST
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.68 / Unit
View Datasheet →PIC16F18345-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18326-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18325-I/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 8-bit RISC |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1 KB |
| EEPROM | 256 B |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage (VDD) | 1.8 V to 5.5 V |
| I/O Pins | 12 |
| ADC | 10-bit, up to 11 channels |
| DAC | 5-bit |
| Comparators | 2 |
| PWM Channels | 10-bit (multiple); plus 8-bit PWM |
| Communication Peripherals | EUSART, I2C, SPI |
| Peripheral Pin Select (PPS) | Yes |
| XLP (eXtreme Low Power) | Yes (nanoWatt technology) |
| Package | 14-TSSOP (4.40 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| RoHS Status | Compliant |
PIC16F18325-I/ST Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O pin; analog input |
| Pin 2 | RA4 — Bidirectional I/O pin; analog input |
| Pin 3 | RA3/MCLR — Bidirectional I/O / Master Clear (reset) input |
| Pin 4 | RC5 — Bidirectional I/O pin |
| Pin 5 | RC4 — Bidirectional I/O pin |
| Pin 6 | RC3 — Bidirectional I/O pin |
| Pin 7 | RC2 — Bidirectional I/O pin |
| Pin 8 | RC1 — Bidirectional I/O pin |
| Pin 9 | RC0 — Bidirectional I/O pin |
| Pin 10 | RB7 — Bidirectional I/O pin; ICSP programming data |
| Pin 11 | RB6 — Bidirectional I/O pin; ICSP programming clock |
| Pin 12 | RB5 — Bidirectional I/O pin |
| Pin 13 | VDD — Positive supply voltage (1.8V-5.5V) |
| Pin 14 | VSS — Ground reference |
Typical Applications
PIC16F18325-I/ST is suitable for 6 applications: IoT Sensor Nodes, Battery-Powered Wearables, LED Lighting Controllers, Consumer Appliance Control, Low-Power Remote Controls, Industrial Sensor Interfaces.
IoT Sensor Nodes
The PIC16F18325-I/ST excels in IoT sensor nodes thanks to its XLP nanoWatt technology with sleep current below 100 nA typical, enabling multi-year battery life from a single CR2032 coin cell. The 32 MHz CPU provides 8 MIPS throughput, sufficient for sensor linearization, threshold detection, and protocol framing without external MCUs. The integrated 10-bit ADC with up to 11 channels handles multiple analog sensors (temperature, light, gas) directly, while EUSART/SPI/I2C peripherals interface with sub-GHz radios (LoRa, Sigfox) or BLE modules. PPS simplifies PCB routing of radio and sensor pins, reducing board area and BOM cost in space-constrained IoT deployments.
Recommended
Battery-Powered Wearables
In battery-powered wearables, the PIC16F18325-I/ST's 1.8V-5.5V operating range supports direct connection to single-cell lithium and coin-cell batteries, while XLP modes extend operational life. The 14-TSSOP package measures just 4.40 mm wide, fitting into wristbands and small form-factor enclosures. The hardware CVD (Capacitive Voltage Divider) ADC mode enables touch button and slider interfaces without dedicated touch ICs, reducing BOM and PCB space. The CLC (Configurable Logic Cell) peripheral implements custom glue logic in hardware, freeing the CPU for sensor fusion algorithms while keeping sleep current minimal during inactive periods.
Recommended
LED Lighting Controllers
The PIC16F18325-I/ST drives LED lighting applications using its Complementary Waveform Generator (CWG) and multiple 10-bit PWM channels. CWG generates complementary PWM outputs with programmable dead-band for half-bridge LED driver stages, while the high-current I/O (50 mA source/sink per pin) directly drives small LED arrays and indicator panels. The 5-bit DAC and 2 comparators implement closed-loop current regulation for constant-current LED strings. PPS routes PWM outputs to optimal pins for PCB trace routing. With 32 MHz CPU speed, the MCU executes scripted lighting sequences, DMX-like protocols, or smooth color-mixing algorithms in real time.
Recommended
Consumer Appliance Control
The PIC16F18325-I/ST serves as the main controller in consumer appliances like coffee machines, washing machines, and kitchen hoods. Its 10-bit resolution ADC reads temperature, humidity, and pressure sensors directly, while PWM outputs control motor speeds, heater elements, and valve actuators. The CWG and CCP peripherals generate precise timing signals for TRIAC phase-angle control or zero-cross detection in AC-powered appliances. With 14 KB Flash, the MCU accommodates full-featured user interfaces including button decoding, LCD driving, and communication with WiFi/BLE companion modules for smart-appliance connectivity. Functional Safety (FuSa) features support IEC 60730 compliance for household appliance safety standards.
Recommended
Low-Power Remote Controls
Remote control applications benefit from the PIC16F18325-I/ST's nanoWatt XLP sleep modes that draw under 100 nA, allowing multi-year operation from a single AAA battery. The integrated IR modulation capability (using PWM + CWG) generates 38 kHz carrier signals for IR transmission without external timer ICs. The 10-bit ADC reads battery level and potentiometer positions, while EUSART interfaces with RF transceivers for 433 MHz / 2.4 GHz remote protocols. Wake-up from sleep on button press is handled via interrupt-on-change on I/O pins, with no need for the CPU to remain active. The compact TSSOP-14 package fits inside standard remote control enclosures.
Recommended
Industrial Sensor Interfaces
In industrial sensor interface modules, the PIC16F18325-I/ST provides signal conditioning, protocol conversion, and local intelligence between field sensors and PLC/SCADA systems. The 10-bit ADC with 11 channels multiplexes multiple 4-20 mA / 0-10V sensor inputs through external signal conditioning. The EUSART implements RS-232/RS-485 half-duplex communication, while SPI connects to digital sensor front-ends. The CWG peripheral generates excitation signals for bridge sensors and RTD measurements. With industrial-grade temperature range (-40C to +85C) and Functional Safety features, the PIC16F18325-I/ST meets the reliability demands of factory automation, process control, and remote monitoring installations.
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Recommended Products Summary
Engineering reference data for PIC16F18325-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18325-E/ST | PIC16F18324-I/ST | PIC16F18345-I/ST | PIC16F18326-I/ST |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same |
| Flash Memory | 14 KB | 14 KB | 14 KB | 16 KB | 28 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 1.8V to 5.5V | 1.8V to 5.5V | 1.8V to 5.5V | 1.8V to 5.5V | 1.8V to 5.5V |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- Largest Flash in TSSOP-14 PIC16F183xx family (vs PIC16F18323-I/SL)
- Extended temperature grade option (vs PIC16F18325-I/ST (this part))
- XLP nanoWatt sleep technology with Functional Safety (vs PIC16F18345-I/ST)
Design Notes
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 13) of the PIC16F18325-I/ST, with the trace from VDD to the cap kept short and wide. For designs with switching peripherals or RF transceivers, add a 10 uF bulk capacitor near the MCU. The 1.8V-5.5V VDD range is wide, but operation below 2.0V reduces the maximum CPU frequency to 8 MHz; consult the datasheet electrical characteristics for the VDD vs FOSC derating curve.
When laying out the 14-TSSOP footprint, ensure the exposed thermal pad (if present in your variant) is soldered to a copper pour connected to VSS for improved thermal dissipation. Route the ICSP programming pins PGD (RB7, pin 10) and PGC (RB6, pin 11) to a 6-pin header or test pad group with a 100-ohm series resistor to allow in-circuit debugging without interfering with application circuits.
Do NOT forget the MCLR pull-up resistor on pin 3 (RA3/MCLR). A floating MCLR pin causes intermittent resets or prevents the MCU from entering run mode. Use a 10 kOhm pull-up to VDD. Also, configure the PPS registers before locking I/O pins used by critical peripherals (EUSART, SPI) to avoid accidental remapping during runtime that could break communications mid-operation.
Compliance Information
RoHS compliant per Microchip product page and distributor listings. Functional Safety (FuSa) features per IEC 60730 Class B for household appliance use. Industrial temp range -40C to +85C; not automotive-qualified (use PIC16F18325-E/ST or automotive-grade variants for higher temp).
