PIC16F18854-I/SP - 8-bit 32MHz 7KB Flash MCU | Microchip
MPN: PIC16F18854-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.2 | $2.20 |
| 10 | $1.95 | $19.50 |
| 100 | $1.71 | $171.00 |
| 500 | $1.5 | $750.00 |
| 1,000 | $1.35 | $1,350.00 |
PIC16F18854-I/SP Overview
What is a PIC16 microcontroller? A PIC16 is an 8-bit Reduced Instruction Set Computing (RISC) microcontroller from Microchip Technology, positioned within the larger PIC microcontroller hierarchy: PIC16 -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. PIC16F parts use Flash program memory (the F suffix) and are widely used for cost-sensitive, low-power embedded designs where deterministic behavior, a small footprint, and long product lifecycle matter more than raw compute throughput.
Key differentiating features include 7 KB Flash, 512 bytes RAM, 256 bytes EEPROM, a 10-bit ADC with up to 24 channels and computation features (ADC2), 5-bit and 10-bit DAC, two comparators, an 8-bit/16-bit timer with Hardware Limit Timer (HLT), Configurable Logic Cells (CLC), Complementary Waveform Generator (CWG), Numerically Controlled Oscillator (NCO), and Zero-Cross Detect (ZCD). Communication peripherals include SPI, I2C, and EUSART. The XLP technology delivers typical sleep currents below 50 nA, enabling battery-powered applications. According to the datasheet, the device operates across 1.8 V to 5.5 V with internal and external oscillator options.
Architecturally, the PIC16F18854-I/SP uses a Harvard architecture with separate program and data buses, a 14-bit instruction word, and a hardware multiplier. The 32 MHz internal oscillator and 4-phase PLL deliver 8 MIPS of throughput while the XLP sleep modes minimize active duty cycles for ultra-low-power designs. Functional Safety (FuSa) documentation makes this part attractive for safety-critical consumer and industrial appliances.
Typical applications include low-power IoT sensor nodes, battery-powered HVAC and home appliances, LED lighting controllers, automotive body and accessory ECUs, capacitive touch user interfaces, sensor signal conditioning nodes, and general-purpose motor control with companion gate drivers. The wide operating voltage range also makes it suitable for industrial 24 V bus systems with adequate local regulation.
When designing with this device, ensure decoupling on both VDD and VSS pins (one 100 nF per pin pair is recommended), confirm in-circuit serial programming (ICSP) header pinout, and use Microchip's MPLAB X IDE with the XC8 compiler for development. Migration between SPDIP (SP), SOIC (SO), and QFN (ML) packages is generally pin-compatible for the 28-pin variant.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16F18854-I/SP — 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 PIC16F18854-I/SP (same form factor and footprint) — differing in ADC, DAC, MSL Level, Mounting Type, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18855-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18856-I/SP
✅ Drop-In✓ In Stock
$1.48 / Unit
View Datasheet →PIC16F18857-I/SP
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →PIC16F18854-I/SO
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →PIC16F18854-E/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18854-I/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit enhanced mid-range |
| Program Memory (Flash) | 7 KB (4K x 14) |
| Data RAM | 512 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 32 MHz |
| Instruction Set Width | 14-bit |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 10-bit with computation, up to 24 channels |
| DAC | 5-bit and 10-bit |
| Comparators | 2 |
| Timers | 8-bit and 16-bit with HLT |
| Communication Peripherals | SPI, I2C, EUSART |
| Core Independent Peripherals (CIPs) | CLC, CWG, NCO, ZCD, CRC/SCAN |
| Package | 28-SPDIP (SP) |
| Mounting Type | Through-Hole |
| Operating Temperature | -40C to +85C (Industrial) |
| XLP Sleep Current | Typical <50 nA |
| Functional Safety (FuSa) | Yes |
| RoHS Status | Compliant |
| MSL Level | Not applicable (through-hole) |
PIC16F18854-I/SP Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O / MCLR input |
| Pin 2 | RA0 — Bidirectional I/O / DAC1 output |
| Pin 3 | RA1 — Bidirectional I/O / DAC2 output |
| Pin 4 | RA2 — Bidirectional I/O / DAC3 output |
| Pin 5 | RA3 — Bidirectional I/O / DAC4 output |
| Pin 6 | RA4 — Bidirectional I/O |
| Pin 7 | RA5 — Bidirectional I/O |
| Pin 8 | RA6 — Bidirectional I/O |
| Pin 9 | RA7 — Bidirectional I/O |
| Pin 10 | RE3 — Input only / MCLR |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | RB7 — Bidirectional I/O / ICSPCLK |
| Pin 14 | RB6 — Bidirectional I/O / ICSPDAT |
| Pin 15 | RB5 — Bidirectional I/O |
| Pin 16 | RB4 — Bidirectional I/O |
| Pin 17 | RB3 — Bidirectional I/O |
| Pin 18 | RB2 — Bidirectional I/O |
| Pin 19 | RB1 — Bidirectional I/O |
| Pin 20 | RB0 — Bidirectional I/O / Interrupt |
| Pin 21 | RC7 — Bidirectional I/O |
| Pin 22 | RC6 — Bidirectional I/O |
| Pin 23 | RC5 — Bidirectional I/O |
| Pin 24 | RC4 — Bidirectional I/O |
| Pin 25 | RC3 — Bidirectional I/O / SCL |
| Pin 26 | RC2 — Bidirectional I/O / SDA |
| Pin 27 | RC1 — Bidirectional I/O |
| Pin 28 | RC0 — Bidirectional I/O |
Typical Applications
PIC16F18854-I/SP is suitable for 6 applications: Low-Power IoT Sensor Node, Battery-Powered Home Appliance Controller, LED Lighting Controller, Automotive Body and Accessory ECU, Capacitive Touch User Interface, Sensor Signal Conditioning Node.
Low-Power IoT Sensor Node
The PIC16F18854-I/SP suits battery-powered wireless sensor nodes because of its sub-50 nA typical sleep current and 32 MHz active throughput of 8 MIPS. In a typical LoRa/BLE sensor design, the PIC16F18854-I/SP sleeps most of the time, wakes on a timer or interrupt, samples a sensor through the 10-bit ADC with computation, applies local digital filtering, and transmits the result before returning to sleep. With 7 KB of Flash, it comfortably fits state machines and BLE beacon service routines plus simple protocol stacks, while the 256-byte EEPROM stores persistent node IDs and calibration constants. The 1.8-5.5 V operating range lets the same part run from a single lithium coin cell (3 V) or two AA alkalines (3 V) without a separate regulator.
Recommended
Battery-Powered Home Appliance Controller
Battery and mains-line powered appliances such as thermostats, smoke detectors, and battery-backed sensors benefit from the PIC16F18854-I/SP's combination of XLP sleep, Functional Safety documentation, and rich on-chip peripherals. The 24-channel 10-bit ADC with computation (ADC2) reads NTC temperature sensors or photo diodes directly, while the 5/10-bit DAC and PWM drive alert buzzers or tricolor LEDs. Configurable Logic Cells (CLC) implement safety interlocks without CPU intervention, and the Hardware Limit Timer (HLT) supports functional-safety timing constraints. The 28-SPDIP package is ideal for hand-soldered prototype and through-hole production boards typical of HVAC controllers and small kitchen appliances.
Recommended
LED Lighting Controller
LED lighting drivers and tunable-white controllers leverage the PIC16F18854-I/SP's Complementary Waveform Generator (CWG), multiple PWMs, and 10-bit DAC for analog dimming. The CWG generates complementary MOSFET drive signals with programmable dead time, ideal for synchronous buck or boost LED converters, while the NCO provides high-resolution dimming below the PWM step size. With 32 MHz CPU and 8 MIPS throughput, the device handles DMX, DALI, or proprietary LED protocols in real time. The wide 1.8-5.5 V supply range lets the same firmware work for 3.3 V low-voltage and 5 V mains-derived LED driver rails. The 28-SPDIP variant suits through-hole LED module designs.
Recommended
Automotive Body and Accessory ECU
Body electronics such as window lift controllers, mirror adjusters, seat controllers, and interior lighting modules use the PIC16F18854-I/SP family for its Functional Safety (FuSa) documentation, robust peripherals, and 1.8-5.5 V supply range. The Configurable Logic Cells, Complementary Waveform Generator, and Hardware Limit Timer support safety interlocks and motor drive, while the EUSART and SPI/I2C enable LIN, CAN, or local body communication. The -40C to +85C industrial temperature grade covers most cabin environments, and the PIC16F18854-E/SP extended-temperature variant covers under-hood. The 28-SPDIP package is preferred for through-hole production lines used by Tier-1 automotive suppliers.
Recommended
Capacitive Touch User Interface
Capacitive touch buttons, sliders, and proximity wake-on-touch interfaces use the PIC16F18854-I/SP's mTouch peripheral support and 10-bit ADC with computation. The CLC and NCO perform mixed-signal signal processing without CPU load, so the device can scan multiple touch electrodes in sleep, wake on proximity, and bring the MCU to full speed only when a touch is validated. With XLP sub-50 nA sleep, battery-powered touch remotes and IoT wall switches can run for years on a single coin cell. The 28-SPDIP package supports hand-soldered prototypes and through-hole touch panel assemblies common in home automation.
Recommended
Sensor Signal Conditioning Node
Industrial sensor signal conditioning nodes use the PIC16F18854-I/SP to digitize analog sensors, apply linearization, and forward readings over SPI or I2C. The 10-bit ADC with computation oversamples and filters inputs without CPU intervention, the on-chip op-amps and comparators condition thermocouples and bridge sensors, and the 5-bit/10-bit DAC generates excitation currents. With 512 bytes of RAM and 7 KB of Flash, the device can host sensor-specific firmware with calibration tables stored in 256 bytes of EEPROM. The wide operating voltage and 32 MHz throughput suit industrial 4-20 mA loop-powered and 24 V bus-powered designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18854-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18855-I/SP | PIC16F18856-I/SP | PIC16F18857-I/SP | PIC16F18854-I/SO | PIC16F18854-E/SP |
|---|---|---|---|---|---|---|
| Package | 28-SPDIP (SP) through-hole | 28-SPDIP (SP) - same | 28-SPDIP (SP) - same | 28-SPDIP (SP) - same | SOIC-28 (SO) - surface mount | 28-SPDIP (SP) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 7 KB | 14 KB | 28 KB | 56 KB | 7 KB (same die) | 7 KB (same die) |
| RAM | 512 bytes | 1 KB | 2 KB | 4 KB | 512 bytes | 512 bytes |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (Extended) |
| Unit Price (qty 1, as of 2026-09-20) | ~$2.20 | ~$2.40 | ~$2.65 | ~$2.85 | ~$2.10 | ~$2.45 |
Key Differentiators
- Functional Safety (FuSa) documentation included for safety-critical designs (vs PIC16F18446-I/SO)
- On-chip 5-bit and 10-bit DAC plus 10-bit ADC with computation (vs PIC16F18855-I/SP)
- Rich Core Independent Peripheral (CIP) set including CLC, CWG, NCO, ZCD (vs PIC16F1829-I/P)
Design Notes
Place one 100 nF decoupling capacitor as close as possible to each VDD pin and a single 10 uF bulk capacitor near the VDD supply entry point. The PIC16F18854-I/SP has two VDD/VSS pin pairs (pins 11/12 and pins in the RC/RB port groups on larger packages); both must be decoupled to ensure stable XLP wakeup and to minimize ADC reference noise.
Keep the ICSP header trace lengths under 50 mm to avoid programming failures on PIC16F18854-I/SP. According to Microchip programming specifications, the ICSPDAT (RB6) and ICSPCLK (RB7) lines should not be heavily loaded by external circuitry; adding a series resistor or buffer is recommended if the pins also drive user loads. Use a 4.7 kohm pull-up on MCLR (pin 1 on the SPDIP variant) to enable reliable reset.
Do not exceed the 5.5 V maximum supply on the PIC16F18854-I/SP. Below 2.3 V, the maximum CPU frequency derates from 32 MHz to 16 MHz, so for 1.8 V designs select the appropriate clock configuration in CONFIG1. Also confirm that unused I/O pins are configured as outputs (not inputs) to avoid floating-pin current consumption in XLP sleep mode.
Compliance Information
RoHS and REACH compliance per Microchip product page. Functional Safety (FuSa) documentation is available separately from Microchip to support IEC 60730 / UL 60730 class B compliance for household appliances. Not AEC-Q100 qualified - PIC16F18854 is intended for industrial / consumer applications; for automotive AEC-Q100 variants use PIC16F18855-E/SP (extended temperature) plus an automotive-grade supplement.
