PIC18F25K40-E/SSVAO - 32KB Flash, 8-bit MCU, AEC-Q100, 28-SSOP | Microchip
MPN: PIC18F25K40-E/SSVAO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.59 | $259.00 |
| 500 | $2.21 | $1,105.00 |
| 1,000 | $1.92 | $1,920.00 |
PIC18F25K40-E/SSVAO Overview
An 8-bit PIC microcontroller is a Harvard-architecture RISC processor with separate program and data buses, optimized for deterministic real-time control. The PIC18 family extends the classic PIC16 instruction set with 16-bit instructions, an extended RAM bank, and C-friendly compiler support (XC8). Within the broader taxonomy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The 'F' prefix denotes Flash memory; the 'K40' sub-family adds Core Independent Peripherals for hardware-driven state machines.
Key features include 25 digital I/O pins, four 16-bit timers, two CCP modules, two comparators, one 5-bit DAC, one 10-bit ADC with up to 24 channels and Computation modes, two I2C/SPI/EART peripherals, and a Windowed Watchdog Timer (WWDT). The device also embeds eXtreme Low Power (XLP) technology with nanoWatt XLP sleep currents, supporting battery-powered applications.
Technically, the PIC18F25K40 uses a modified Harvard core with a 16-bit instruction word and 8-bit data path. Its CIP block allows PWM, waveform generation, and signal conditioning to run without CPU intervention, offloading the 8-bit core for application logic. The 10-bit ADC with Computation (ADCC) automates averaging, threshold comparison, and accumulator functions, reducing firmware burden for sensor sampling loops.
Typical applications include automotive body electronics, sensor signal conditioning, LED lighting control, low-power IoT sensor nodes, and human-machine interface (HMI) subsystems. The AEC-Q100 grade makes the /SSVAO suffix specifically suited to vehicle environments requiring -40C to +125C operation and PPAP documentation.
When designing with this device, allocate pin budget carefully: 25 I/O is reduced by the analog and debug allocations. Use the ADCC for sensor averaging to free CPU cycles, and leverage the WWDT and CRC/SCAN peripherals for functional safety without software overhead.
This page synthesizes verified distributor pricing, AEC-Q100 qualification notes, drop-in PIC18 alternatives, and practical design notes not consolidated on the manufacturer product page.
Drop-in alternatives for PIC18F25K40-E/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 PIC18F25K40-E/SSVAO (same form factor and footprint) — differing in ADC, Package, Communication, Core, Operating Temperature.
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Request AlternativesPIC18F25K40-E/SSVAO Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Core | PIC18 (Harvard RISC, 16-bit instructions) |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| Data SRAM | 2 KB |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 64 MHz |
| Operating Voltage Range | 2.3 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 10-bit ADC with Computation (ADCC), up to 24 channels |
| DAC | 5-bit DAC, 1 channel |
| Comparators | 2 |
| PWM | 16-bit PWM (multiple instances) |
| CCP Modules | 2 |
| Timers | 4 x 16-bit timers |
| Communication | 2x EUSART, 2x I2C/SPI |
| CIP Peripherals | CWG, WWDT, CRC/SCAN, HLT |
| Package | 28-pin SSOP (Wide, 5.30 mm body width) |
| Operating Temperature Range | -40 C to +125 C (E suffix = extended) |
| Automotive Qualification | AEC-Q100 (VAO suffix) |
| XLP Technology | nanoWatt XLP, sleep currents down to sub-uA |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F25K40-E/SSVAO Pin Configuration
| Pin 1 | RA2 — Port A bit 2 (digital I/O, analog input) |
| Pin 2 | RA3 — Port A bit 3 (digital I/O, analog input) |
| Pin 3 | RA4 — Port A bit 4 (digital I/O, analog input) |
| Pin 4 | RA5 — Port A bit 5 (digital I/O, analog input) |
| Pin 5 | RA6 — Port A bit 6 (digital I/O, analog input) |
| Pin 6 | RA7 — Port A bit 7 (digital I/O, analog input) |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA0 — Port A bit 0 (digital I/O, analog input) |
| Pin 9 | RA1 — Port A bit 1 (digital I/O, analog input) |
| Pin 10 | RB0 — Port B bit 0 (digital I/O, analog input, IOC) |
| Pin 11 | RB1 — Port B bit 1 (digital I/O, analog input, IOC) |
| Pin 12 | RB2 — Port B bit 2 (digital I/O, analog input, IOC) |
| Pin 13 | RB3 — Port B bit 3 (digital I/O, analog input, IOC) |
| Pin 14 | RB4 — Port B bit 4 (digital I/O, IOC) |
| Pin 15 | RB5 — Port B bit 5 (digital I/O, IOC) |
| Pin 16 | RB6 — Port B bit 6 (digital I/O, IOC, ICSPCLK) |
| Pin 17 | RB7 — Port B bit 7 (digital I/O, IOC, ICSPDAT) |
| Pin 18 | VSS — Ground reference |
| Pin 19 | VDD — Positive supply voltage |
| Pin 20 | VSS — Ground reference (or AVSS) |
| Pin 21 | RC0 — Port C bit 0 (digital I/O, analog input) |
| Pin 22 | RC1 — Port C bit 1 (digital I/O, analog input) |
| Pin 23 | RC2 — Port C bit 2 (digital I/O, analog input) |
| Pin 24 | RC3 — Port C bit 3 (digital I/O, analog input) |
| Pin 25 | RC4 — Port C bit 4 (digital I/O, analog input) |
| Pin 26 | RC5 — Port C bit 5 (digital I/O, analog input) |
| Pin 27 | RC6 — Port C bit 6 (digital I/O, EUSART1 TX) |
| Pin 28 | RC7 — Port C bit 7 (digital I/O, EUSART1 RX) |
Typical Applications
PIC18F25K40-E/SSVAO is suitable for 6 applications: Automotive Body Electronics, LED Lighting Controllers, Low-Power IoT Sensor Nodes, Human-Machine Interface (HMI) Subsystems, Motor Control and PWM Drives, Industrial Sensor Signal Conditioning.
Automotive Body Electronics
The PIC18F25K40-E/SSVAO is purpose-built for automotive body electronics such as body control modules, door/window lift controllers, and seat control ECUs. Its AEC-Q100 qualification with PPAP documentation satisfies OEM sourcing requirements, while the -40C to +125C operating range covers underhood and cabin environments. The 32KB Flash accommodates CAN/LIN stack plus application logic; the 10-bit ADCC with 24 channels reads multiple sensor inputs (temperature, position, current) without CPU intervention via Computation modes. The integrated 16-bit PWM drives motors and LEDs with hardware-generated waveforms, and the CWG (Complementary Waveform Generator) produces complementary outputs with dead-band control for H-bridge motor drives. The WWDT and CRC/SCAN peripherals support ASIL-rated functional safety architectures typical in body domain controllers.
Recommended
LED Lighting Controllers
The PIC18F25K40-E/SSVAO is well-suited to automotive and architectural LED lighting controllers requiring AEC-Q100 grade and multi-channel PWM. The 16-bit PWM modules with multiple instances allow individual dimming control of RGB or tunable-white LED strings, while the CWG produces complementary drive signals with programmable dead-band for half-bridge LED driver topologies. The 5-bit DAC sets LED current references, and the 10-bit ADCC samples photodiode feedback for closed-loop brightness regulation. The 32KB Flash stores color-mixing lookup tables and DMX/CANopen protocol stacks. XLP nanoWatt sleep modes reduce quiescent current to sub-microamp levels for battery-backed always-on lighting controllers, making the part ideal for automotive interior ambient lighting and exterior signal lamp ECUs.
Recommended
Low-Power IoT Sensor Nodes
The PIC18F25K40-E/SSVAO fits battery-powered IoT sensor nodes where low sleep current and integrated ADCC matter most. nanoWatt XLP technology delivers sub-microamp sleep currents with peripheral wake-on-touch capability, extending coin-cell battery life to multi-year horizons. The 10-bit ADCC with 24 channels scans multiple sensors (temperature, humidity, voltage, current) in hardware, then asserts an interrupt only when thresholds are crossed - the CPU remains asleep. The 32KB Flash accommodates sensor fusion algorithms and BLE/Sub-GHz protocol stacks. With 2.3V-5.5V operation, the MCU accepts single-cell Li-Ion or two AA cells directly. The E/SSVAO industrial/automotive temperature grade suits outdoor deployments and industrial IoT gateways in harsh environments.
Recommended
Human-Machine Interface (HMI) Subsystems
The PIC18F25K40-E/SSVAO drives small HMI subsystems such as appliance control panels, instrument cluster sub-displays, and industrial operator panels. Its 25 I/O pins connect to LED segment drivers, keypads, rotary encoders, and small character LCDs without external I/O expanders. The 16-bit PWM generates tones and brightness ramps for buzzer and backlight control, while the EUSART/I2C/SPI peripherals drive segment LED drivers and EEPROM. The 5-bit DAC sets analog reference voltages for sensor interfaces. With AEC-Q100 grade, the MCU also serves automotive HMI controllers for HVAC panels and steering-column switches. The 32KB Flash holds UI state machines and debounce logic.
Recommended
Motor Control and PWM Drives
The PIC18F25K40-E/SSVAO drives small brushed DC, BLDC, and stepper motors in automotive and industrial applications. The 16-bit PWM with center-aligned mode and the dedicated CWG (Complementary Waveform Generator) deliver complementary outputs with programmable dead-band - ideal for half-bridge and full-bridge MOSFET drivers. The two comparators implement hardware current limiting, while the 10-bit ADCC samples back-EMF and current-sense amplifiers for sensorless control loops. The WWDT detects stalled firmware, and the CRC/SCAN verifies Flash integrity - both critical for functional safety. With 32KB Flash, the MCU runs FOC (field-oriented control) algorithms for small BLDC pumps and fans. AEC-Q100 grade suits automotive coolant pumps and HVAC blower controllers.
Recommended
Industrial Sensor Signal Conditioning
The PIC18F25K40-E/SSVAO provides on-board signal conditioning for industrial 4-20mA loops, bridge sensors, and thermocouple interfaces. The 10-bit ADCC with up to 24 channels and built-in hardware averaging removes 50/60Hz line noise without CPU overhead. The 5-bit DAC generates excitation currents for RTD and bridge sensors, while the two comparators implement window-discriminator circuits for alarm outputs. The CRC/SCAN peripheral continuously verifies Flash memory integrity, supporting SIL-1 functional safety architectures in process control. The MCU's 5V tolerance interfaces directly to legacy industrial 5V sensors without level shifters, and the AEC-Q100 / extended temperature grade suits factory-floor deployments near variable-frequency drives and motor starters.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F25K40-E/SSVAO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F25K40-E/SS | PIC18F24K40-E/SS | PIC18F26K40-E/SS | PIC18F25K42-E/SSVAO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP (Wide) | 28-SSOP (Wide) - same | 28-SSOP (Wide) - same | 28-SSOP (Wide) - same | 28-SSOP (Wide) - same |
| Flash Memory | 32 KB | 32 KB | 24 KB (-25%) | 64 KB (+100%) | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Maximum CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 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 |
| AEC-Q100 Qualification | Yes (VAO suffix) | No (industrial only) | No (industrial only) | Optional VAO variant exists | Yes (VAO suffix) |
| DMA Controller | No | No | No | No | Yes (K42 generation) |
Key Differentiators
- AEC-Q100 automotive qualification with PPAP (vs PIC18F25K40-E/SS)
- 32KB Flash with full CIP peripheral set (vs PIC18F24K40-E/SS)
- 64KB Flash upgrade path with same pinout (vs PIC18F26K40-E/SS)
- DDR generation with DMA controller (vs PIC18F25K42-E/SSVAO)
Design Notes
Place a 100nF decoupling capacitor as close as possible to the VDD pin (pin 20) and a bulk capacitor (1uF to 10uF) on the same supply trace. For battery-powered designs using XLP sleep modes, add a 100kohm pull-up on the MCLR pin to minimize sleep current leakage. The MCU's nanoWatt XLP technology delivers sub-microamp sleep currents only when all unused I/O pins are configured as outputs driving low or as inputs with the WPU disabled.
The 28-pin wide SSOP package has a typical thermal resistance of approximately 90 C/W theta-JA, which is adequate for the PIC18F25K40-E/SSVAO's low core currents. In sealed automotive enclosures with no airflow, ensure the ambient temperature plus self-heating remains below 125C. The MCU's core power dissipation at 64MHz with all peripherals active is approximately 25mW, well within the SSOP's thermal envelope.
Route the ICSPDAT and ICSPCLK signals (RB7/RB6) with short, direct traces to the in-circuit programming header to avoid signal integrity issues during programming. Keep the analog inputs (RA0-RA7, RB0-RB3) away from high-current switching traces; place the AVSS/VDD pair adjacent to analog circuitry. For CAN/LIN applications, route the EUSART1 signals (RC6/RC7) as a 100-ohm differential pair with ground shielding, and keep the trace length under 50mm to minimize reflections.
Do not exceed the absolute maximum VDD of 6.5V; use the MCP1826 LDO regulator rated for automotive transients. When migrating from PIC18F25K22 to PIC18F25K40, note that the K40 adds CWG, WWDT, CRC/SCAN, and 5-bit DAC peripherals but the register map differs - firmware must be recompiled with the latest XC8 compiler. For AEC-Q100 PPAP documentation, request the IMDS (International Material Data System) submission from Microchip via your franchised distributor.
Compliance Information
AEC-Q100 qualified per VAO suffix designator. PPAP documentation available from Microchip via franchised distributors. RoHS and REACH compliant per Microchip material composition disclosures. Halogen-free per Microchip environmental compliance documentation.
