PIC16F18856T-I/SSVAO - 28KB Flash 8-bit MCU, AEC-Q100 | Microchip
MPN: PIC16F18856T-I/SSVAO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.36 | $236.00 |
| 500 | $2.18 | $1,090.00 |
| 1,000 | $2.05 | $2,050.00 |
PIC16F18856T-I/SSVAO Overview
An 8-bit microcontroller (MCU) is a small, low-power programmable processor built around an 8-bit data bus, combining a CPU, non-volatile Flash program memory, volatile SRAM, EEPROM data storage, and a rich set of on-chip peripherals in a single chip. MCUs sit at the bottom of the embedded-compute hierarchy (8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC) and are commonly used to replace discrete logic in cost- and power-sensitive designs. The PIC16F18856 specifically belongs to the mid-range PIC16F enhanced family, adding Core Independent Peripherals (CIPs) such as ADCC, CWG, SMT, HLT, WWDT, CRC/SCAN, and configurable logic cells that offload tasks from the CPU.
Key features of the PIC16F18856T-I/SSVAO include the eXtreme Low Power (XLP) technology with active and deep-sleep currents typically well under 1 µA in sleep mode, a 12-bit Analog-to-Digital Converter with Computation (ADCC) oversampling for averaging and threshold comparisons, multiple Enhanced Universal Synchronous/Asynchronous Receiver/Transmitter (EUSART) and SPI/I²C interfaces, and up to 25 general-purpose I/O pins. The Functional Safety (FuSa) support library assists developers building safety-critical firmware per IEC 61508 / ISO 26262 workflows, which is critical for automotive ECUs.
The /SSVAO suffix combination denotes the 28-pin SSOP package, industrial -40 °C to +85 °C temperature grade with tape-and-reel packaging, and the automotive-grade qualification. The MCU integrates brown-out reset (BOR), power-on reset (POR), a windowed watchdog timer (WWDT), and a peripheral pin select (PPS) that allows remapping of digital peripherals to almost any I/O pin, simplifying PCB routing.
Typical applications include automotive body and chassis ECUs, sensor signal conditioning with the ADCC, consumer appliance control panels, IoT edge nodes running on battery power with XLP sleep, and industrial human-machine interface (HMI) controllers. The wide voltage range and robust peripheral mix also suit USB-free sensor hubs and small motor-control loops when paired with the Complementary Waveform Generator (CWG).
When designing with this part, plan for proper decoupling (0.1 µF ceramic close to VDD with a bulk 1 µF or larger), an in-circuit serial programming (ICSP) header for production firmware update, and review Microchip application note TB3132 for migrating existing PIC16F1xxxx firmware to the newer CIP architecture. This page combines distributor stock, AEC-Q100 variant alternatives, and selection notes that go beyond what the standard datasheet summary provides.
Drop-in alternatives for PIC16F18856T-I/SSVAO — 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/SSVAO (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Program Memory (Flash), DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18856T-E/SSVAO
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →PIC16F18855T-I/SS
✅ Drop-In✓ In Stock
$1.21 / Unit
View Datasheet →PIC16F18855-I/SSVAO
✅ Drop-In✓ In Stock
$2.08 / Unit
View Datasheet →PIC16F18446T-I/SO
✅ Drop-In✓ In Stock
$0.6406 / Unit
View Datasheet →PIC16F18445-E/SSVAO
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →PIC16F18856T-I/SSVAO Maximum Ratings & Electrical Characteristics
| Series | PIC® XLP™ 16F |
| Family | PIC16(L)F1885x |
| Core | 8-bit PIC |
| Program Memory (Flash) | 28 KB (16K x 14 words) |
| SRAM | 2 KB |
| EEPROM | 256 B |
| Max CPU Speed | 32 MHz |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C (Industrial, "I" grade) |
| AEC-Q100 Qualification | Qualified (VAO suffix indicates automotive grade) |
| Analog-to-Digital Converter | ADCC, 12-bit with computation (oversampling) |
| I/O Pins | Up to 25 |
| Package | 28-SSOP (0.209 in / 5.30 mm width) |
| Mounting Type | Surface Mount |
| Functional Safety | FuSa support library (IEC 61508 / ISO 26262 workflows) |
| Core Independent Peripherals | CWG, SMT, HLT, CRC/SCAN, PWM, CCP, Configurable Logic Cells |
| Communication | EUSART, SPI, I²C |
| Timers/Counters | Multiple 8/16-bit with WWDT (windowed watchdog) |
PIC16F18856T-I/SSVAO Pin Configuration
| Pin 1 | RA2/VDD — General-purpose I/O / digital VDD supply |
| Pin 2 | RA3 — General-purpose I/O |
| Pin 3 | RA4 — General-purpose I/O |
| Pin 4 | RA5 — General-purpose I/O |
| Pin 5 | RA6 — General-purpose I/O |
| Pin 6 | RA7 — General-purpose I/O |
| Pin 7 | VSS — Ground reference (digital) |
| Pin 8 | RB0 — General-purpose I/O / ICSPDAT |
| Pin 9 | RB1 — General-purpose I/O / ICSPCLK |
| Pin 10 | RB2 — General-purpose I/O |
| Pin 11 | RB3 — General-purpose I/O |
| Pin 12 | RB4 — General-purpose I/O |
| Pin 13 | RB5 — General-purpose I/O |
| Pin 14 | RB6/ICSPCLK — ICSP clock (programming/debug) |
| Pin 15 | RB7/ICSPDAT — ICSP data (programming/debug) |
| Pin 16 | RC0 — General-purpose I/O |
| Pin 17 | RC1 — General-purpose I/O |
| Pin 18 | RC2 — General-purpose I/O |
| Pin 19 | RC3 — General-purpose I/O |
| Pin 20 | RC4 — General-purpose I/O |
| Pin 21 | RC5 — General-purpose I/O |
| Pin 22 | RC6 — General-purpose I/O |
| Pin 23 | RC7 — General-purpose I/O |
| Pin 24 | VSS — Ground reference |
| Pin 25 | VOUT — Voltage regulator output (core logic) |
| Pin 26 | RA0 — General-purpose I/O |
| Pin 27 | RA1 — General-purpose I/O |
| Pin 28 | VDD — Digital supply input |
Typical Applications
PIC16F18856T-I/SSVAO is suitable for 6 applications: Automotive Body and Chassis ECUs, Battery-Powered IoT Sensor Nodes, Industrial Sensor Signal Conditioning, Consumer Appliance HMI Controllers, Small BLDC and DC Motor Control, Medical Patient Monitoring Devices (Class II).
Automotive Body and Chassis ECUs
The PIC16F18856T-I/SSVAO targets automotive body and chassis control modules where AEC-Q100 qualification and Functional Safety (FuSa) workflows are mandatory. Its 28 KB Flash hosts both application firmware and Microchip's FuSa library for ISO 26262-aligned diagnostics, while the 12-bit ADCC with computation over-samples wheel-speed, temperature, or seat-occupancy sensor inputs to suppress noise. Pin-select (PPS) flexibility lets one hardware PCB support multiple ECU variants (BCM, HVAC, door module) by remapping digital peripherals in firmware, slashing tooling cost. The -40 °C to +85 °C industrial "I" grade plus AEC-Q100 screening ensures reliable operation in harsh cabin and under-hood environments with high humidity and thermal cycling.
Recommended
Battery-Powered IoT Sensor Nodes
The PIC16F18856T-I/SSVAO's eXtreme Low Power (XLP) technology keeps deep-sleep current well under 1 µA while the on-chip ADC samples periodically, enabling multi-year CR2032 coin-cell life for IoT sensor endpoints such as door/window sensors, leak detectors, or asset trackers. The 28-SSOP package fits behind compact PCBs and the peripheral pin select lets I²C sensors, GPIO interrupts, and a low-power timer share pins without external muxes. Adaptive Sleep and Peripheral Module Disable features allow unused ADCC channels, EUSART, and PWM blocks to be powered down to extend battery life. The 32 MHz CPU burst lets the MCU wake, process, transmit, and return to sleep in microseconds, maximising average efficiency for duty-cycled wireless nodes.
Recommended
Industrial Sensor Signal Conditioning
The PIC16F18856T-I/SSVAO is well suited for industrial 4–20 mA current-loop and 0–10 V analog sensor-conditioning boards, where the 12-bit ADCC with computation provides built-in averaging, oversampling, and threshold-comparison functions that replace discrete op-amp filter stages. Its 1.8 V to 5.5 V supply range accepts 3.3 V or 5 V rail power directly, and the WWDT plus CRC/SCAN support safety integrity level (SIL) monitoring for IEC 61508 machinery controls. The CWG (Complementary Waveform Generator) simplifies isolated gate-driver bias generation when paired with a digital isolator and MOSFET bridge for motor-control or solenoid drive. The 28-SSOP industrial temperature grade remains reliable in factory-automation panels with ambient swings and vibration.
Recommended
Consumer Appliance HMI Controllers
In washing-machine, microwave, or induction-cooktop user-interface panels, the PIC16F18856T-I/SSVAO drives LED indicators, capacitive touch buttons via the SMT (Signal Measurement Timer), and PWM-controlled LCD or RGB status bars from a single IC. The Configurable Logic Cells allow combinational glue logic (debouncing, latching, edge detection) without external gates, reducing BOM cost. Its Functional Safety features support IEC 60335-1 household-appliance safety requirements for locked-rotor, overtemperature, and door-open faults. The wide 1.8 V to 5.5 V supply and -40 °C to +85 °C industrial temperature range handle kitchen/laundry environment variability.
Recommended
Small BLDC and DC Motor Control
The PIC16F18856T-I/SSVAO integrates the Complementary Waveform Generator (CWG) and multiple PWM channels capable of driving a small 3-phase brushless DC (BLDC) or brushed DC motor up to a few hundred Hz of commutation frequency, ideal for fans, pumps, and miniature appliance motors. The configurable logic cells generate the dead-band control and complementary drive signals without software intervention, freeing the CPU for sensor feedback, fault detection, and speed-control loops. AEC-Q100 qualification supports small automotive interior fan, headlamp-levelling, or seat-ventilation motors. The integrated 12-bit ADCC back-EMF sensing complements current-shunt amplifier inputs in field-oriented control firmware.
Recommended
Medical Patient Monitoring Devices (Class II)
The PIC16F18856T-I/SSVAO fits Class II medical-monitoring devices where IEC 60601-1-2 EMC compliance and Microchip's Functional Safety documentation support risk-management files for temperature, SpO2, or respiration-rate peripherals. Its low XLP sleep current suits battery-powered wearable pulse oximeters and continuous glucose monitor receivers, while the 12-bit ADCC conditions thermocouple, thermistor, or photodiode front-ends with built-in averaging. The 28-SSOP package allows compact hand-held enclosures, and the AEC-Q100 VAO grade signals robust manufacturing and test traceability to risk files. Microchip's medical-grade middleware and validated firmware modules accelerate FDA 510(k) submission preparation when paired with this part.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18856T-I/SSVAO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18856T-E/SSVAO | PIC16F18855T-I/SS | PIC16F18855-I/SSVAO | PIC16F18446T-I/SO | PIC16F18445-E/SSVAO |
|---|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP | 28-SOIC | 28-SSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 28 KB | 28 KB | 14 KB | 14 KB | 28 KB | 14 KB |
| SRAM | 2 KB | 2 KB | 1 KB | 1 KB | 2 KB | 1 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Max CPU Speed | 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 (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) |
| AEC-Q100 (VAO Suffix) | Yes (VAO) | Yes (VAO) | No (Industrial, no VAO) | Yes (VAO) | No (Industrial, no VAO) | Yes (VAO) |
| Supply 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 |
Key Differentiators
- Industrial temperature grade with AEC-Q100 automotive qualification (vs PIC16F18855T-I/SS)
- 28 KB Flash memory plus 2 KB SRAM for mid-density firmware (vs PIC16F18855-I/SSVAO)
- 12-bit ADCC with computation for software-free averaging (vs PIC16F18446T-I/SO)
Design Notes
Place a 0.1 µF ceramic decoupling capacitor as close as physically possible to each VDD pin (pins 1 and 28 on the 28-SSOP package), and add a bulk 1 µF to 10 µF tantalum or ceramic capacitor nearby on the same trace. The internal 5.1 V voltage regulator (VOUT) does not require external pass elements but should be bypassed with at least 1 µF ceramic to minimise digital switching noise coupling into the analog supply reference. For battery-powered applications, leverage the VREGPM bits to disable the on-chip voltage regulator and reduce sleep current by tens of µA.
The 28-SSOP package has a 0.65 mm pitch and 5.30 mm body width — leave at least 0.5 mm clearance between the body and adjacent copper pours and route all traces beneath the package lands on inner layers to escape with 0.2 mm trace-and-space. Keep analog sensor traces away from PWM and switching regulator signals by at least 2 mm, and provide a single-point ground connection to a ground plane to minimise ADC reference noise. Microchip recommends 4-layer stack-ups with a continuous ground plane below the ICSP/ICSPDAT (RB6/RB7) lines to avoid capacitive loading during in-circuit programming.
When migrating firmware from older PIC16F1xxxx parts, pay special attention to the Peripheral Pin Select (PPS) register settings — older devices had fixed pin assignments, while the PIC16F18856T-I/SSVAO can remap most digital peripherals to nearly any I/O, and forgetting to unlock PPS (PPSLOCK register sequence) results in silent peripheral failure. Also ensure the windowed watchdog timer (WWDT) window value is set below the main loop execution time, or the reset will trigger even on healthy firmware. Last, do not skip the 1 µF VOUT bypass even in production — without it, ADC reference accuracy degrades by 1–2 LSB.
Route the ICSP signal pair (ICSPCLK on RB6 and ICSPDAT on RB7) with a 4.7 kΩ pull-up to VDD on each line, and keep these traces short to minimise capacitive loading beyond the 50 pF Microchip programming specification. For EUSART, SPI, or I²C signals routed across long PCB headers (e.g., external sensor boards), add 33 Ω series damping resistors within 5 mm of the MCU pin to reduce ringing on the rising edges. If the application operates in electrically noisy automotive or industrial environments, consider shielding the analog input traces with a ground guard ring tied back to the AGND reference.
Compliance Information
AEC-Q100 qualified via the VAO suffix. RoHS and REACH compliance per Microchip product declarations; lead-free (Pb-free) and halogen-free per industry-standard MSL-3 packaging. Verify specific declarations against your procurement requirements.
