PIC16F18854-I/SO - 8-bit 32MHz 7KB Flash XLP MCU | Microchip
MPN: PIC16F18854-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.74 | $1.74 |
| 10 | $1.56 | $15.60 |
| 100 | $1.31 | $131.00 |
| 500 | $1.1 | $550.00 |
| 1,000 | $0.94 | $940.00 |
| 3,000 | $0.82 | $2,460.00 |
PIC16F18854-I/SO Overview
An 8-bit PIC microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU, non-volatile Flash memory, RAM, EEPROM, and a configurable peripheral set into a single die. The PIC16F18854 belongs to the larger taxonomy: MCU -> microcontroller -> 8-bit microcontroller -> PIC16 family -> PIC16F1885X/7X sub-family -> microcontrollers > integrated circuits > semiconductors. The XLP architecture is a Microchip-specific low-power design that minimizes active and sleep currents, enabling battery-sourced products that run for years on a single cell.
Key specifications include 32 MHz internal oscillator (8 MHz with 4x PLL), 512 bytes RAM, 256 bytes EEPROM, a 10-bit ADC with computation, 5-bit DAC, multiple PWM/CCP modules, two UART, two SPI, one I2C, and up to 24 I/O pins. The device also integrates CRC/SCAN, HLT (Hardware Limit Timer), and Zero-Cross Detection for functional-safety (FuSa) class applications. The integrated 28-pin SOIC footprint offers the same land pattern as industry-standard 28-SOIC microcontrollers, simplifying PCB reuse.
Technical depth: the PIC16F18854 uses a Harvard RISC architecture with a 14-bit instruction word, 8-bit data path, and peripheral pin-select (PPS) routing. The instruction set is upward-compatible with classic PIC16 cores, allowing code reuse across the family. The analog front end includes a 10-bit ADC with up to 24 channels (depending on package), internal voltage reference, and a computation mode that performs oversampling and averaging in hardware, offloading the CPU.
Typical applications include IoT sensor nodes, battery-powered wearables, home appliances, motor control, LED lighting, and low-power wireless sensor hubs. The combination of XLP, eXtreme Low Power PIC sleep modes, and 7 KB Flash suits space- and energy-constrained designs that still need analog and communication peripherals.
When designing with this part, ensure the configuration words are programmed to match the intended oscillator and watchdog settings, and place a 0.1uF decoupling capacitor close to each VDD pin. The PPS feature allows peripheral signals to be remapped to most I/O pins, giving layout flexibility but requiring careful review of the pin allocation table in the datasheet.
This page synthesizes distributor pricing from DigiKey, Mouser, Microchip Direct, and Octopart; package-compatible Microchip drop-in alternatives; and practical design notes not found in the standalone datasheet, giving engineers a single reference for selection, BOM management, and PCB reuse.
Drop-in alternatives for PIC16F18854-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 PIC16F18854-I/SO (same form factor and footprint) — differing in ADC, Package, MSL Level, Operating Temperature, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18854-I/SS
✅ Drop-In✓ In Stock
$1.32 / Unit
View Datasheet →PIC16F18854-E/SO
✅ Drop-In✓ In Stock
$1.34 / Unit
View Datasheet →PIC16F18855-I/SO
✅ Drop-In✓ In Stock
$1.29 / Unit
View Datasheet →PIC16F18854-I/MV
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16F18854-I/ML
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F18877-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18854-I/SO Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Family | PIC16F1885X/7X (XLP, Functional Safety) |
| Core | 8-bit PIC RISC, 14-bit instruction word |
| CPU Speed (max) | 32 MHz (8 MHz internal with 4x PLL) |
| Program Flash | 7 KB (4K x 14 words) |
| Data RAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Operating Voltage | 1.8 V to 5.5 V |
| I/O Pins | Up to 24 (package dependent) |
| ADC | 10-bit, with Computation (up to 24 channels) |
| DAC | 5-bit |
| PWM / CCP | Multiple PWM/CCP modules |
| Communication | 2x UART, 2x SPI, 1x I2C |
| Core-Independent Peripherals (CIP) | CRC/SCAN, HLT, Zero-Cross Detection, CWG, NCO |
| Operating Temperature | -40 C to +85 C (Industrial -I grade) |
| Package | 28-pin SOIC (SO, 7.50 mm body) |
| Mounting Type | Surface Mount |
| RoHS | Compliant |
| MSL Level | 1 |
PIC16F18854-I/SO Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O / analog input |
| Pin 2 | RA3 — Bidirectional I/O / analog input |
| Pin 3 | RA4 — Bidirectional I/O / analog input |
| Pin 4 | RA5 — Bidirectional I/O / analog input |
| Pin 5 | RA6 — Bidirectional I/O / analog input |
| Pin 6 | RA7 — Bidirectional I/O / analog input |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RB0 — Bidirectional I/O / interrupt-on-change |
| Pin 9 | RB1 — Bidirectional I/O / interrupt-on-change |
| Pin 10 | RB2 — Bidirectional I/O / interrupt-on-change |
| Pin 11 | RB3 — Bidirectional I/O / interrupt-on-change |
| Pin 12 | RB4 — Bidirectional I/O / interrupt-on-change |
| Pin 13 | RB5 — Bidirectional I/O / interrupt-on-change |
| Pin 14 | RB6 — Bidirectional I/O / ICSCLK |
| Pin 15 | RB7 — Bidirectional I/O / ICSDAT |
| Pin 16 | AVSS — Analog ground |
| Pin 17 | RA0 — Bidirectional I/O / analog input |
| Pin 18 | RA1 — Bidirectional I/O / analog input / DAC output |
| Pin 19 | VDD — Positive supply voltage |
| Pin 20 | RC0 — Bidirectional I/O |
| Pin 21 | RC1 — Bidirectional I/O |
| Pin 22 | RC2 — Bidirectional I/O |
| Pin 23 | RC3 — Bidirectional I/O / SCL |
| Pin 24 | RC4 — Bidirectional I/O / SDA |
| Pin 25 | RC5 — Bidirectional I/O |
| Pin 26 | RC6 — Bidirectional I/O / TX |
| Pin 27 | RC7 — Bidirectional I/O / RX |
| Pin 28 | MCLR — Master clear reset (active low) |
Typical Applications
PIC16F18854-I/SO is suitable for 6 applications: Battery-Powered IoT Sensor Node, Home Appliance Control Board, LED Lighting and Dimming Controller, Industrial Sensor Transmitter, Low-Power Wearable Health Monitor, Motor Control and Small BLDC Driver.
Battery-Powered IoT Sensor Node
The PIC16F18854-I/SO suits IoT sensor nodes because its XLP architecture delivers nanoamp sleep currents while still providing a 32 MHz core for active measurements. The 7 KB Flash fits OTA-friendly firmware with CRC/SCAN verification, while the 10-bit ADC with computation oversamples sensor data, offloading the CPU. Place the MCU adjacent to a coin-cell holder, route RA0-RA3 to analog sensor inputs, and use PPS to remap SPI/I2C to any free I/O. Compared to ARM Cortex-M0+ alternatives, the PIC16F18854's deep-sleep current (<100 nA typical) and 1.8V-5.5V operation allow multi-year battery life on a single CR2032 cell.
Recommended
Home Appliance Control Board
The PIC16F18854-I/SO is well matched to home appliance controls (washing machines, dishwashers, coffee makers) because the 32 MHz core drives UART/SPI/I2C peripherals for HMI displays, the 10-bit ADC reads thermistor/motor-current sensors, and the PWM/CCP modules run BLDC or triac-fired AC loads. Core-independent peripherals such as CWG and NCO offload waveform generation, freeing the CPU for user-interface logic. The 256-byte EEPROM stores user settings across power cycles. Place 0.1uF decoupling on each VDD pin, route analog inputs with short traces, and use the SOIC package for through-hole-friendly wave soldering on cost-sensitive appliance boards.
Recommended
LED Lighting and Dimming Controller
The PIC16F18854-I/SO drives LED lighting controllers because the multiple PWM/CCP modules provide multi-channel dimming, the CWG (Complementary Waveform Generator) handles high-frequency switching for boost/buck drivers, and the 10-bit ADC reads ambient light sensors for closed-loop brightness control. The 1.8V-5.5V supply range lets the same part operate from 3.3V digital rails and 5V analog drivers. Compared to dedicated LED-driver ICs, the PIC16F18854 adds programmability for tunable white, RGB color mixing, and DALI/Casambi protocols while keeping BOM count low. Use PPS to route PWM outputs to any pin, simplifying the PCB layout.
Recommended
Industrial Sensor Transmitter
The PIC16F18854-I/SO fits industrial 4-20mA sensor transmitters because its 1.8V-5.5V supply, industrial -40C to +85C rating, and 10-bit ADC with computation provide reliable sensor conditioning in noisy factory environments. CRC/SCAN and HLT (Hardware Limit Timer) deliver functional-safety supervision that detects runaway code or stuck I/O. The 256-byte EEPROM stores calibration constants, while the UART enables RS-485 or Modbus communication. Use the SOIC package for vibration-resistant SMT mounting, and pair with an external 4-20mA current loop driver such as XTR105. Compared to bare 8-bit MCUs, the PIC16F18854's FuSa features reduce external watchdog cost.
Recommended
Low-Power Wearable Health Monitor
The PIC16F18854-I/SO suits wearable health monitors because the XLP architecture delivers sub-uA sleep current while the 32 MHz core wakes on interrupt to process heart-rate, SpO2, or motion data. The 10-bit ADC with computation handles PPG sensor signal chains, and the 5-bit DAC drives LED biasing for SpO2 measurement. The 256-byte EEPROM stores device calibration and step-count history, while the I2C bus interfaces to low-power accelerometers and BLE modules. The compact 28-SOIC fits wrist-band PCBs. Compared to ARM Cortex-based wearables, the PIC16F18854's deep-sleep current is lower, extending battery life for always-on health monitoring.
Recommended
Motor Control and Small BLDC Driver
The PIC16F18854-I/SO drives small BLDC and brushed-DC motors because the multiple PWM/CCP modules generate complementary switching waveforms, the CWG handles dead-time insertion, and the QEI (Quadrature Encoder Interface) decodes shaft position feedback. The 32 MIPS core runs field-oriented control loops at adequate update rates for sub-100W motors, while the 10-bit ADC samples phase currents via op-amp front ends. The 256-byte EEPROM stores motor calibration parameters. Use the SOIC footprint for through-hole-friendly wave soldering on motor-control PCBs, and pair with gate drivers such as MCP1416 or FAN8100. Compared to dedicated motor-control MCUs, the PIC16F18854's CIP peripherals offload timing-critical tasks, leaving CPU headroom for application logic.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18854-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18854-I/SS | PIC16F18854-E/SO | PIC16F18855-I/SO | PIC16F18854-I/MV | PIC16F18877-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (SO, 7.50 mm body, 1.27 mm pitch) | 28-SSOP (5.30 mm body, 0.65 mm pitch) - smaller outline | 28-SOIC (same footprint) | 28-SOIC (same footprint) | 28-UQFN (4x4 mm) - different land pattern | 28-SOIC (same footprint) |
| Flash | 7 KB | 7 KB | 7 KB | 14 KB | 7 KB | 28 KB |
| RAM | 512 B | 512 B | 512 B | 1 KB | 512 B | 2 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 1.8V - 5.5V | 1.8V - 5.5V | 1.8V - 5.5V | 1.8V - 5.5V | 1.8V - 5.5V | 1.8V - 5.5V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| CIP Features | CRC/SCAN, HLT, CWG, NCO, ZCD | Same set | Same set | Same set | Same set | Same set, larger instances |
Key Differentiators
- XLP (eXtreme Low Power) architecture with nanoamp sleep currents (vs PIC16F18325-I/SO)
- Functional-safety (FuSa) features: CRC/SCAN, HLT, Zero-Cross Detection (vs PIC16F18345-I/SO)
- Same 28-SOIC footprint as PIC16F18855 and PIC16F18877 with more Flash headroom (vs PIC16F18854-E/SO)
- Peripheral Pin Select (PPS) for flexible pin assignment (vs PIC16F1829-I/SO)
Design Notes
Place a 0.1uF decoupling capacitor as close as possible to the VDD pin (pin 19) and a bulk 1uF to 10uF capacitor on the same supply trace. The PIC16F18854's XLP architecture benefits from low-impedance supplies during sleep-to-active transitions. Avoid routing high-current switching traces (PWM, motor drive) near VDD or analog AVSS pins to minimize digital noise coupling into ADC measurements.
Use the Peripheral Pin Select (PPS) feature to remap UART/SPI/I2C signals to any digital I/O pin, which simplifies PCB routing when compared to fixed-pin MCUs. Group analog inputs (RA0-RA5) away from PWM outputs to reduce crosstalk. Keep the MCLR trace short and place the MCLR pull-up resistor (typically 10k ohm) close to the MCU; add a 100nF cap if external reset switches are used.
Configuration words must be programmed to match the intended oscillator source (INTOSC vs external crystal), watchdog timer setting, and code protection. Forgetting to enable the PLL before relying on 32 MHz operation will leave the core running at 8 MHz. EEPROM writes require the WRERR and WREN bits to be set; interrupts should be disabled during the write sequence to avoid corruption. Verify ADC channel selection against the datasheet pin allocation table, since analog-capable pins differ between 28-pin and 40-pin package variants.
When using the 10-bit ADC with computation, enable the ADC dedicated FRC oscillator to maintain consistent ADC clocking regardless of the system clock source. This eliminates ADC accuracy drift caused by system clock variations. For I2C lines, place 4.7k ohm pull-ups close to the MCU and keep bus capacitance below 400 pF to meet Fast-mode timing. For SPI, keep trace lengths matched within 25 mm to avoid timing skews above 8 MHz SCK rates.
Compliance Information
RoHS compliant per Microchip product page. -I grade is industrial temperature (-40C to +85C), not AEC-Q100 qualified; use -E or -Q suffix for automotive applications. Lead-free and halogen-free per Microchip material declarations.
