PIC16F18856T-I/MV - 28KB Flash 8-bit XLP MCU | Microchip
MPN: PIC16F18856T-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.75 | $1.75 |
| 10 | $1.58 | $15.80 |
| 100 | $1.32 | $132.00 |
| 500 | $1.14 | $570.00 |
| 1,000 | $0.95 | $950.00 |
PIC16F18856T-I/MV Overview
An 8-bit PIC microcontroller is a compact RISC-based computing core that integrates program and data memory, peripherals, and a CPU into a single IC. PIC microcontrollers belong to the microcontroller (MCU) family of integrated circuits, sitting hierarchically between simple logic ICs and higher-end 32-bit MCUs. They are widely used in embedded systems requiring deterministic behavior, low power consumption, and ease of programming through Microchip's MPLAB X IDE and XC8 compiler toolchain.
The PIC16F18856T-I/MV features eXtreme Low Power (XLP) technology for battery-friendly applications, ten timers, five CCP modules (capture/compare/PWM), two PWM channels, two comparators, a 10-bit ADC with computation, a 5-bit DAC, a Complementary Waveform Generator (CWG), a Zero-Cross Detect (ZCD) module, and Peripheral Pin Select (PPS) for flexible signal routing. Communication peripherals include EUSART, SPI, and I2C. Safety-oriented features include CRC/SCAN, Hardware Limit Timer (HLT), and Windowed Watchdog Timer (WWDT), making the part suitable for Functional Safety (FuSa) designs.
The device uses an enhanced mid-range PIC16 CPU core with a 14-bit instruction word, enabling single-cycle execution except for branch instructions. PPS allows nearly any digital peripheral to be routed to most I/O pins, simplifying PCB layout and BOM reuse. The XLP technology delivers nanoWatt sleep currents suitable for energy-harvesting and IoT edge nodes.
Typical applications include low-power IoT sensor nodes, battery-powered consumer electronics, automotive body and HVAC subsystems, industrial sensor interfaces, LED lighting controllers, and home appliance control boards. In these roles, the combination of analog peripherals (ADC, DAC, comparators, ZCD) and communication interfaces (EUSART, SPI, I2C) reduces external component count.
When designing with this device, plan for adequate PCB copper on the exposed pad to meet the thermal envelope of the UQFN-28 package, and use MPLAB X IDE with the XC8 compiler for code development. For functional-safety designs, refer to the device's FMEDA and safety manual resources available on Microchip's website.
This page synthesizes distributor pricing, drop-in same-package alternatives from Microchip's PIC16 family, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16F18856T-I/MV — 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 PIC16F18856T-I/MV (same form factor and footprint) — differing in ADC, Package, Timers, Comparators, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18856-I/MV
✅ Drop-In✓ In Stock
$1.83 / Unit
View Datasheet →PIC16F18855-I/MV
✅ Drop-In✓ In Stock
$1.22 / Unit
View Datasheet →PIC16F18854-I/MV
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16F18855T-I/ML
✅ Drop-In✓ In Stock
$1.26 / Unit
View Datasheet →PIC16F18855T-I/SS
✅ Drop-In✓ In Stock
$1.21 / Unit
View Datasheet →PIC16F18855T-I/SO
✅ Drop-In✓ In Stock
$0.81 / Unit
View Datasheet →PIC16F18856T-I/MV Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 8-bit RISC, 14-bit instruction word |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Clock | 32 MHz |
| Operating Voltage Range | 2.3 V to 5.5 V |
| Number of I/O Pins | 25 |
| ADC | 10-bit ADC with computation (ADC2) |
| DAC | 5-bit DAC |
| Timers | 11 |
| CCP Modules | 5 (Capture/Compare/PWM) |
| Comparators | 2 |
| PWM Channels | 2 |
| Communication Interfaces | EUSART, SPI, I2C |
| Package | UQFN-28 (4x4 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 °C to +85 °C (Industrial) |
| Special Features | XLP nanoWatt, PPS, CWG, ZCD, CRC/SCAN, HLT, WWDT, FuSa |
| RoHS Status | Compliant |
PIC16F18856T-I/MV Pin Configuration
| Pin 1 | RA0 — Bidirectional I/O, analog input |
| Pin 2 | RA1 — Bidirectional I/O, analog input |
| Pin 3 | RA2 — Bidirectional I/O, analog input |
| Pin 4 | RA3 — Bidirectional I/O, analog input |
| Pin 5 | RA4 — Bidirectional I/O |
| Pin 6 | RA5 — Bidirectional I/O |
| Pin 7 | RA6 — Bidirectional I/O |
| Pin 8 | RA7 — Bidirectional I/O, OSC1 |
| Pin 9 | VSS — Ground |
| Pin 10 | OSC2/RA8 — Oscillator output or GPIO |
| Pin 11 | RB0 — Bidirectional I/O, programming clock |
| Pin 12 | RB1 — Bidirectional I/O |
| Pin 13 | RB2 — Bidirectional I/O |
| Pin 14 | RB3 — Bidirectional I/O |
| Pin 15 | RB4 — Bidirectional I/O |
| Pin 16 | RB5 — Bidirectional I/O |
| Pin 17 | RB6 — Bidirectional I/O, ICSPCLK |
| Pin 18 | RB7 — Bidirectional I/O, ICSPDAT |
| Pin 19 | RC0 — Bidirectional I/O |
| Pin 20 | RC1 — Bidirectional I/O |
| Pin 21 | RC2 — Bidirectional I/O |
| Pin 22 | RC3 — Bidirectional I/O |
| Pin 23 | RC4 — Bidirectional I/O |
| Pin 24 | RC5 — Bidirectional I/O |
| Pin 25 | RC6 — Bidirectional I/O |
| Pin 26 | RC7 — Bidirectional I/O |
| Pin 27 | VDD — Positive supply voltage |
| Pin 28 | VSS/EP — Ground / exposed thermal pad (must be soldered to PCB ground) |
Typical Applications
PIC16F18856T-I/MV is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Automotive Body and HVAC Control, Industrial Sensor Interfaces and Transmitters, Home Appliance Control Boards, LED Lighting Controllers, Consumer Wearable Devices.
Battery-Powered IoT Sensor Nodes
The PIC16F18856T-I/MV fits battery-powered IoT sensor nodes through its XLP nanoWatt technology, which delivers deep-sleep currents low enough to extend coin-cell runtime to multi-year timescales. The 32 MHz core processes periodic sensor samples (temperature, humidity, motion) and runs local decision algorithms before transmitting via the integrated EUSART, SPI, or I2C peripherals. The 10-bit ADC2 with computation handles direct sensor interfacing without an external analog front end. The 2.3-5.5 V supply range covers both 3.3 V coin cells and 5 V USB power, and PPS lets the designer move I2C or SPI to any available pins for board simplification. Power dissipation at full 32 MHz is roughly 8 mA, but XLP idle mode drops below 1 uA, a critical trade-off for energy-budget engineering.
Recommended
Automotive Body and HVAC Control
In automotive body controllers (mirror adjusters, interior lighting, HVAC flap motors), the PIC16F18856T-I/MV provides the analog peripherals and PWM channels needed for closed-loop actuator control. The Complementary Waveform Generator (CWG) drives half-bridges and motor bridges, while the 10-bit ADC reads potentiometer positions and temperature sensors. Five CCP modules generate PWM for fan speed and lighting dimming. The -40 °C to +85 °C industrial temperature range covers most cabin environments, though for under-hood applications Microchip recommends AEC-Q100 qualified parts from the same family. CRC/SCAN and WWDT contribute to functional-safety compliance per IEC 61508 / ISO 26262, while the 25 I/O pins via PPS enable compact single-MCU body modules.
Recommended
Industrial Sensor Interfaces and Transmitters
Industrial 4-20 mA loop-powered transmitters and bridge-sensor interfaces leverage the PIC16F18856T-I/MV's 10-bit ADC2, 5-bit DAC, and two comparators to digitize sensor signals while the integrated op-amp-style analog peripherals handle signal conditioning. The 2.3-5.3 V supply range accommodates regulated 24 V loops via a simple LDO front end. ZCD (Zero-Cross Detect) simplifies AC-line voltage monitoring in motor control and TRIAC firing applications. CRC/SCAN and the Hardware Limit Timer (HLT) improve system diagnostics and fault response, critical for IEC 61508 SIL-2 designs. PPS allows board designers to assign I2C or SPI to the most convenient pins, reducing layout iterations and BOM risk.
Recommended
Home Appliance Control Boards
Washing machines, dishwashers, microwave ovens, and coffee makers use the PIC16F18856T-I/MV as the central user-interface and motor-control MCU. The five CCP modules drive brushless DC motors and stepper motors for valve control, while the 25 I/O pins connect to membrane keypads, LED or LCD displays, and rotary encoders. The CWG simplifies inverter-style motor drive with dead-band control, and the ZCD module detects AC zero-crossings for TRIAC-based heater or dimmer outputs. Industrial temperature rating ensures reliable operation in appliance thermal environments, while XLP technology supports battery-backed clock and timer functions during power-down states.
Recommended
LED Lighting Controllers
The PIC16F18856T-I/MV supports multi-channel LED lighting controllers through its PWM modules, CWG, and integrated comparators. Five CCP modules generate high-resolution PWM for tunable white and RGB color mixing, while the 10-bit ADC reads ambient light sensors for closed-loop dimming. The 32 MHz CPU executes lighting algorithms (logarithmic dimming curves, color temperature compensation) with negligible latency. PPS lets designers route PWM outputs to any pin, simplifying PCB routing in compact light fixtures. XLP technology enables battery-powered portable fixtures and emergency lighting that must idle for months on a single charge.
Recommended
Consumer Wearable Devices
Consumer wearables (fitness bands, smartwatches, hearables) leverage the PIC16F18856T-I/MV's XLP technology, small UQFN-28 (4x4 mm) footprint, and rich peripheral set to pack feature-rich functionality into compact enclosures. The 32 MHz core drives small OLED displays and processes motion sensor data through I2C/SPI, while the 10-bit ADC reads optical heart-rate sensors. PPS allows flexible pin assignment for compact flex-PCB layouts. NanoWatt sleep modes extend battery life to weeks, and the -40 °C to +85 °C range supports outdoor wearables. For higher-end wearables with BLE connectivity, designers typically pair this MCU with a dedicated radio module.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18856T-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18856-I/MV | PIC16F18855-I/MV | PIC16F18854-I/MV | PIC16F18855T-I/ML | PIC16F18855T-I/SS | PIC16F18855T-I/SO |
|---|---|---|---|---|---|---|---|
| Package | UQFN-28 (4x4 mm) | UQFN-28 (4x4 mm) - same | UQFN-28 (4x4 mm) - same | UQFN-28 (4x4 mm) - same | QFN-28 (6x6 mm) - same die | SSOP-28 - same die | SOIC-28 - same die |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 28 KB | 28 KB | 14 KB | 7 KB | 14 KB | 14 KB | 14 KB |
| Data SRAM | 2 KB | 2 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Data EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage Range | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Operating Temperature Range | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Functional Safety Features | CRC/SCAN, HLT, WWDT, FuSa | CRC/SCAN, HLT, WWDT, FuSa | CRC/SCAN, HLT, WWDT, FuSa | CRC/SCAN, HLT, WWDT, FuSa | CRC/SCAN, HLT, WWDT, FuSa | CRC/SCAN, HLT, WWDT, FuSa | CRC/SCAN, HLT, WWDT, FuSa |
Key Differentiators
- Largest memory in PIC16F1885X/7X family (vs PIC16F18855-I/MV)
- Full peripheral set including 5 CCP modules and HLT (vs PIC16F18854-I/MV)
- Compact 4x4 mm UQFN package for space-constrained designs (vs PIC16F18855T-I/SS)
Design Notes
The UQFN-28 (4x4 mm) package has an exposed thermal pad (EP) that MUST be soldered to the PCB ground plane to meet the datasheet's thermal resistance specifications. For designs that dissipate moderate power (e.g., 32 MHz full-speed operation with all peripherals active), connect the EP to a continuous ground copper pour at least 10 mm x 10 mm to keep junction temperature below 85 °C in industrial environments. Without proper EP soldering, expect higher junction temperatures and potential reliability degradation.
Place the bulk VDD decoupling capacitor (1-10 uF ceramic) as close as possible to pin 27 (VDD) with a short trace to the ground plane. Add a 0.1 uF high-frequency decoupling capacitor adjacent to the VDD pin to suppress switching transients. The MCLR reset pin (if used in your design) requires a 10 kohm pull-up to VDD and a 0.1 uF capacitor to ground for reliable reset behavior. Place the ICSP programming header (PGC/PGD on RB6/RB7) on the board edge for in-circuit programming access.
Do not assume the ADC reference voltage is VDD by default - the PIC16F18856's 10-bit ADC2 supports various reference configurations (VDD, external VREF+, FVR). Misconfigured references cause inaccurate readings, especially in low-voltage battery applications where VDD sags. Also note that PPS must be unlocked via the PPSLOCK register sequence before peripheral pin assignment changes take effect, otherwise the configuration will silently fail.
For battery-powered designs, take advantage of the XLP nanoWatt sleep modes: Sleep mode with peripherals disabled typically draws less than 1 uA, while RTCC with a 32 kHz crystal provides timekeeping at ~1 uA. Always disable unused peripherals in firmware and disable the ADC before entering Sleep to minimize leakage. Avoid leaving floating digital inputs - configure unused I/O pins as outputs low to prevent shoot-through current in the input buffer stage.
Compliance Information
RoHS and REACH compliance per Microchip product page. AEC-Q100 qualification NOT applicable to this industrial-grade part; for AEC-Q100 qualified variants consult the PIC16F18856 automotive grade listing.
