PIC16F18855T-I/SSVAO - 14KB Flash 32MHz 8-bit MCU AEC-Q100 | Microchip
MPN: PIC16F18855T-I/SSVAO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.27 | $227.00 |
| 500 | $2.04 | $1,020.00 |
| 1,000 | $1.8 | $1,800.00 |
| 2,100 | $1.62 | $3,402.00 |
PIC16F18855T-I/SSVAO Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash), data memory (RAM), and peripherals such as timers, ADC, communication ports, and GPIO. PIC microcontrollers use a RISC Harvard-architecture 8-bit core with separate program and data buses, enabling single-cycle instruction execution. The PIC16F18855 sits in the hierarchy: PIC16 -> PIC 8-bit -> PIC microcontroller -> microcontroller -> embedded system IC, optimized for low-power mixed-signal applications.
Key features include 32 MHz internal oscillator (HFINTOSC) with PLL providing up to 32 MHz instruction throughput, 14KB Flash program memory, 1KB SRAM, 256B EEPROM, a 10-bit ADC with computation (ADC2), multiple 8/16-bit timers, and Core Independent Peripherals such as CLC, NCO, and PWM. Communication interfaces include EUSART, MSSP (I2C/SPI), and Automotive-grade voltage range of 2.3V to 5.5V.
The device integrates a precision 1.024V internal voltage reference, a temperature indicator, and hardware limit timer (HLT). The PIC16F18855 utilizes nanoWatt XLP technology with currents below 50 nA in sleep mode with RTCC and WDT running, supporting battery-powered automotive applications.
Typical applications include automotive body electronics, sensor interfaces, LED lighting controllers, HVAC controls, and LIN-connected slave nodes. The wide 2.3V-5.5V range and AEC-Q100 qualification support 12V automotive bus systems with regulators.
When designing with this MCU, ensure VDD decoupling with 100nF ceramic capacitors placed within 5mm of each VDD pin. Configure unused pins as outputs low to minimize power. Use ICD3 or ICD4 with the 4-pin ICSP interface for programming and debugging.
Drop-in alternatives for PIC16F18855T-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 PIC16F18855T-I/SSVAO (same form factor and footprint) — differing in ADC, Package, Core Independent Peripherals, Program Memory (Flash), Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F18855T-I/SS
✅ Drop-In✓ In Stock
$1.21 / Unit
View Datasheet →PIC16F18855-I/SSVAO
✅ Drop-In✓ In Stock
$2.08 / Unit
View Datasheet →PIC16F18855T-E/SSVAO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18854T-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F18445T-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16F18446T-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.6406 / Unit
View Datasheet →PIC16F18855T-I/SSVAO Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1 KB |
| EEPROM | 256 B |
| Maximum CPU Speed | 32 MHz |
| Supply Voltage (VDD) | 2.3 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial, -I) |
| Package | 28-pin SSOP (0.209 inch / 5.30 mm width) |
| ADC | 10-bit ADC with computation (ADC2) |
| Timers | Multiple 8/16-bit timers |
| Communication | EUSART, MSSP (I2C/SPI) |
| Core Independent Peripherals | CLC, NCO, PWM, CRC/SCAN, HLT |
| Automotive Qualification | AEC-Q100 (VAO suffix) |
| Functional Safety | FuSa support |
| Low Power Technology | eXtreme Low Power (XLP) nanoWatt |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| Internal Reference | 1.024 V fixed voltage reference |
PIC16F18855T-I/SSVAO Pin Configuration
| Pin 1 | RA0 — PORTA I/O / analog input |
| Pin 2 | RA1 — PORTA I/O / analog input |
| Pin 3 | RA2 — PORTA I/O / analog input |
| Pin 4 | RA3 — PORTA I/O / analog input |
| Pin 5 | RA4 — PORTA I/O |
| Pin 6 | RA5 — PORTA I/O |
| Pin 7 | RA6 — PORTA I/O |
| Pin 8 | RA7 — PORTA I/O / oscillator |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | RB0 — PORTB I/O / interrupt-on-change |
| Pin 12 | RB1 — PORTB I/O / interrupt-on-change |
| Pin 13 | RB2 — PORTB I/O |
| Pin 14 | RB3 — PORTB I/O |
| Pin 15 | RB4 — PORTB I/O |
| Pin 16 | RB5 — PORTB I/O |
| Pin 17 | RB6 — PORTB I/O / ICSP clock |
| Pin 18 | RB7 — PORTB I/O / ICSP data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RC0 — PORTC I/O |
| Pin 22 | RC1 — PORTC I/O |
| Pin 23 | RC2 — PORTC I/O |
| Pin 24 | RC3 — PORTC I/O / SCL |
| Pin 25 | RC4 — PORTC I/O / SDA |
| Pin 26 | RC5 — PORTC I/O |
| Pin 27 | RC6 — PORTC I/O / TX |
| Pin 28 | RC7 — PORTC I/O / RX |
Typical Applications
PIC16F18855T-I/SSVAO is suitable for 6 applications: Automotive Body Electronics Modules, LIN Bus Slave Nodes, Automotive LED Lighting Controllers, HVAC Control Units, Sensor Interface Modules, Battery-Connected Automotive Modules.
Automotive Body Electronics Modules
The PIC16F18855T-I/SSVAO fits automotive body control modules with its AEC-Q100 qualification, 2.3V-5.5V wide supply range, and 32 MHz CPU. Its AEC-Q100 grade handles 12V battery transients via external regulators, and its 14KB Flash accommodates body controller firmware including door lock, window lift, and lighting logic. The PIC16F18855T-I/SSVAO consumes under 50 nA in sleep with RTCC, ideal for always-on automotive nodes. Compared to automotive-grade 16-bit MCUs at this price point, the PIC16F18855T-I/SSVAO delivers AEC-Q100 with 8-bit simplicity.
Recommended
LIN Bus Slave Nodes
The PIC16F18855T-I/SSVAO integrates the EUSART supporting LIN 1.x/2.x slave communication with auto-baud detection, plus MSSP for SPI sensor interfaces. Its CIP blocks (CLC, NCO) handle LIN protocol timing in hardware without CPU intervention, freeing the core for application logic. AEC-Q100 qualification with VAO suffix meets automotive OEM LIN node requirements. The 14KB Flash accommodates LIN stack plus application code, and the 256B EEPROM stores node configuration and slave ID non-volatilely.
Recommended
Automotive LED Lighting Controllers
The PIC16F18855T-I/SSVAO drives automotive LED lighting including tail lamps, DRL, and interior mood lighting using its hardware PWM peripherals and 10-bit ADC2 for current sensing. The CIP-based CLC blocks implement peak current mode control in hardware, reducing firmware complexity and CPU load. AEC-Q100 reliability supports under-hood and exterior lighting environments with -40C to +125C ambient. The 14KB Flash fits RGB color-mixing algorithms and CAN/LIN command interpreters.
Recommended
HVAC Control Units
The PIC16F18855T-I/SSVAO integrates HVAC control logic with its 10-bit ADC2 (computation feature automates averaging and threshold detection), 32 MHz CPU for PID loop execution, and EUSART/MSSP for communication with the HVAC master module. AEC-Q100 qualification meets cabin and engine-bay HVAC reliability targets. The XLP nanoWatt sleep mode below 50 nA with RTCC supports always-on climate scheduling. With 14KB Flash and 1KB RAM, the device handles blower speed control, blend door positioning, and temperature regulation firmware.
Recommended
Sensor Interface Modules
The PIC16F18855T-I/SSVAO aggregates and pre-processes sensor data using its 10-bit ADC2 with computation, hardware CLC for signal conditioning, and MSSP/EUSART for backhaul. AEC-Q100 qualification supports chassis and powertrain sensor modules exposed to vibration and temperature extremes. The internal 1.024V voltage reference and temperature indicator enable ratiometric measurements without external analog components. 14KB Flash accommodates sensor fusion and calibration algorithms.
Recommended
Battery-Connected Automotive Modules
The PIC16F18855T-I/SSVAO operates directly from 5V regulated rails in battery-connected modules, drawing under 50 nA in sleep mode with RTCC running. AEC-Q100 grade and -40C to +125C extended temperature range support parking-lot and always-on applications such as key fob receivers, anti-theft modules, and tire pressure monitor sensors (TPMS). The wide 2.3V-5.5V supply tolerates crank and load-dump transients after regulation. The 14KB Flash fits security stacks and crypto-light authentication firmware.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18855T-I/SSVAO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18855T-I/SS | PIC16F18855-I/SSVAO | PIC16F18855T-E/SSVAO | PIC16F18854T-I/SS | PIC16F18445T-I/SO | PIC16F18446T-I/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SOIC - wider pitch | 28-SOIC - wider pitch |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 14 KB | 14 KB | 14 KB | 14 KB | 7 KB | 14 KB | 28 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 512 B | 1 KB | 1 KB |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| AEC-Q100 Qualified | Yes | No | Yes | Yes | No | No | No |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +125C (Extended) | -40C to +85C | -40C to +85C | -40C to +85C |
| Packaging | Tape & Reel | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
Key Differentiators
- AEC-Q100 qualified with VAO suffix for automotive reliability (vs PIC16F18855T-I/SS)
- Tube vs Tape-and-Reel availability in same die (vs PIC16F18855-I/SSVAO)
- Extended-temperature variant for engine-bay applications (vs PIC16F18855T-E/SSVAO)
Design Notes
Place a 100nF ceramic decoupling capacitor within 5 mm of each VDD pin (pins 10 and 20 on the 28-SSOP). Add a bulk 10uF tantalum or ceramic capacitor at the regulator output. The PIC16F18855T-I/SSVAO supply range is 2.3V to 5.5V; for automotive 12V battery inputs, use an external LDO or buck regulator (e.g., MCP1700) to derive a stable 5V or 3.3V rail. Verify voltage transients comply with ISO 7637-2 for automotive modules.
Configure all unused GPIO pins as outputs driving low to minimize current consumption. Set the JTAGEN bit to disable to prevent unintended JTAG activation on RB6/RB7 pins used for ICSP. For low-power applications, use the XLP nanoWatt sleep modes with RTCC and WDT - confirmed current below 50 nA in datasheet. Failure to disable unused peripherals in active mode can increase current by hundreds of microamps.
Route the ICSP clock and data lines (RB6 and RB7) with short, direct traces to the programming header. Maintain at least 0.2 mm clearance between analog signals and digital switching lines to minimize ADC2 crosstalk. Place the 32.768 kHz crystal (if used for RTCC) close to SOSCO/SOSCI pins with a ground guard ring for noise immunity. The 28-SSOP thermal pad is not present; rely on copper pours for heat dissipation, which is adequate given the low-power PIC architecture.
Compliance Information
AEC-Q100 qualified per VAO suffix designation. RoHS and REACH compliant per Microchip product page.
