PIC18F25K42T-E/SSVAO - 32KB Flash 8-bit MCU, AEC-Q100 | Microchip
MPN: PIC18F25K42T-E/SSVAO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.47 | $34.70 |
| 100 | $3.04 | $304.00 |
| 500 | $2.71 | $1,355.00 |
| 1,000 | $2.4 | $2,400.00 |
PIC18F25K42T-E/SSVAO Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around a CPU with an 8-bit data path, on-chip Flash for program storage, RAM for variables, EEPROM for non-volatile data, and a rich peripheral set including timers, ADC, communication interfaces, and Core Independent Peripherals (CIPs). Within the broader taxonomy, the PIC18F25K42T-E/SSVAO belongs to: microcontroller -> embedded MCU -> PIC18 family -> PIC18 K-series -> PIC18(L)FxxK42 family -> 28-pin K42 sub-family -> automotive-grade (AEC-Q100) variants. This hierarchy is what distinguishes it from 16-bit dsPIC and 32-bit ARM Cortex-M competitors from other vendors.
The key feature set includes a 12-bit differential ADC with Computation (ADC2), a 5-bit DAC, on-chip DMA, three analog comparators, a 16-bit PWM, four Configurable Logic Cells (CLC), Complementary Waveform Generator (CWG), Hardware Limit Timer (HLT), Windowed Watchdog Timer (WWDT), CRC/Memory Scan, and Peripheral Pin Select (PPS) for flexible signal routing. CIPs let designers offload logic to hardware, reducing CPU wake events and extending battery life in always-on applications.
On the architecture side, this MCU uses Microchip's enhanced mid-range 8-bit CPU core with a 16-bit instruction word and an 8-level hardware stack, paired with a Harvard bus that lets the CPU fetch from Flash while reading data from RAM. The XLP nanoWatt technology adds multiple idle/sleep modes and ultra-low-power peripherals such as RTCC, HLVD, and WWDT, enabling years of operation from a single coin cell when properly configured.
Typical applications for the PIC18F25K42T-E/SSVAO span the automotive AEC-Q100 landscape: body controllers, sensor interfaces, LED lighting modules, HVAC actuators, BCM auxiliary functions, and LIN-connected nodes. Industrial and consumer variants in the same family address general-purpose motor control, IoT end nodes, and battery-powered sensing.
When designing with this device, ensure proper decoupling (100 nF + bulk cap close to VDD/AVDD/VBAT) and configure unused pins as outputs low to minimize leakage. The PPS peripheral must be locked before entering sleep to avoid accidental peripheral remap after a watchdog reset.
This page synthesizes distributor pricing, AEC-Q100 cross-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC18F25K42T-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 PIC18F25K42T-E/SSVAO (same form factor and footprint) — differing in ADC, Package, DAC, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F25K42-E/SSVAO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F25K42T-E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F25K42-I/SS
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC18F25K40-E/SSVAO
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC18F25K40T-I/SS
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC18F25K42T-E/SSVAO Maximum Ratings & Electrical Characteristics
| Product Family | PIC18 (L)FxxK42 |
| Core | PIC18 8-bit enhanced mid-range |
| Program Flash Memory | 32 KB |
| SRAM | 2 KB |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 2.3 V to 5.5 V |
| Package | 28-pin SSOP (5.30 mm / 0.209" width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +125 C (automotive grade, "E") |
| ADC | 12-bit differential with Computation (ADC2) |
| DAC | 5-bit |
| DMA Channels | Yes, on-chip |
| Core Independent Peripherals | CLC, CWG, HLT, WWDT, CRC/Memory Scan, PPS |
| Communication Interfaces | UART, SPI, I2C (per family datasheet DS40001869) |
| AEC-Q100 Grade | Qualified (automotive, "VAO" suffix) |
| Lead-Free / RoHS | Lead-free finish; RoHS status per manufacturer page |
PIC18F25K42T-E/SSVAO Pin Configuration
| Pin 1 | RA0/IOC0/ANA0/ADACT0 — PORTA bit 0 / interrupt-on-change / analog input / ADC trigger |
| Pin 2 | RA1/IOC1/ANA1 — PORTA bit 1 / IOC / analog input 1 |
| Pin 3 | RA2/IOC2/ANA2 — PORTA bit 2 / IOC / analog input 2 |
| Pin 4 | RA3/IOC3/ANA3/VREF+ — PORTA bit 3 / IOC / analog input 3 / VREF+ |
| Pin 5 | RA4/IOC4/ANA4 — PORTA bit 4 / IOC / analog input 4 |
| Pin 6 | RA5/IOC5/ANA5 — PORTA bit 5 / IOC / analog input 5 |
| Pin 7 | RA6/IOC6/OSC2/CLKOUT — PORTA bit 6 / IOC / OSC2 / CLKOUT |
| Pin 8 | RA7/IOC7/OSC1/CLKIN — PORTA bit 7 / IOC / OSC1 / CLKIN |
| Pin 9 | VSS — Ground reference |
| Pin 10 | RB0/IOC8/ANB0/FLT0/CCP2 — PORTB bit 0 / IOC / analog / PWM fault / CCP2 |
| Pin 11 | RB1/IOC9/ANB1/CCP1 — PORTB bit 1 / IOC / analog / CCP1 |
| Pin 12 | RB2/IOC10/ANB2 — PORTB bit 2 / IOC / analog 2 |
| Pin 13 | RB3/IOC11/ANB3 — PORTB bit 3 / IOC / analog 3 |
| Pin 14 | RB4/IOC12/ANB4 — PORTB bit 4 / IOC / analog 4 |
| Pin 15 | RB5/IOC13/ANB5/CLCIN3 — PORTB bit 5 / IOC / analog 5 / CLC input 3 |
| Pin 16 | RB6/IOC14/ICSPCLK — PORTB bit 6 / IOC / ICD clock (programming/debug) |
| Pin 17 | RB7/IOC15/ICSPDAT — PORTB bit 7 / IOC / ICD data (programming/debug) |
| Pin 18 | VSS — Ground reference (second VSS pin) |
| Pin 19 | VDD — Positive supply voltage |
| Pin 20 | RC0/SOSCO — PORTC bit 0 / secondary oscillator output (32 kHz crystal) |
| Pin 21 | RC1/SOSCI — PORTC bit 1 / secondary oscillator input |
| Pin 22 | RC2 — PORTC bit 2 / general digital I/O (PPS-mappable) |
| Pin 23 | RC3 — PORTC bit 3 / general digital I/O (PPS-mappable) |
| Pin 24 | RC4 — PORTC bit 4 / general digital I/O (PPS-mappable) |
| Pin 25 | RC5 — PORTC bit 5 / general digital I/O (PPS-mappable) |
| Pin 26 | RC6 — PORTC bit 6 / general digital I/O (PPS-mappable) |
| Pin 27 | RC7 — PORTC bit 7 / general digital I/O (PPS-mappable) |
| Pin 28 | MCLR/RE3 — Master Clear (reset) input; can be disabled as RE3 (digital input only) |
Typical Applications
PIC18F25K42T-E/SSVAO is suitable for 6 applications: Automotive Body Control Module (BCM), LIN Network Sensor Nodes, Automotive LED Lighting Modules, HVAC Blower and Stepper Control, Industrial Sensor Interface Board, Battery-Powered IoT Edge Node.
Automotive Body Control Module (BCM)
The PIC18F25K42T-E/SSVAO's AEC-Q100 qualification and -40 C to +125 C operating range make it well-suited for body control module auxiliary functions such as mirror control, seat adjustment, and wiper control. Its 64 MHz CPU and 32 KB Flash run small LIN stacks and CIP-driven state machines for contact-bounce filtering and timing without CPU overhead. The 12-bit ADC2 with Computation handles position-sensor reads while DMA offloads PWM updates, freeing the CPU for communication tasks.
Recommended
LIN Network Sensor Nodes
As a LIN slave in automotive distributed sensor networks, the PIC18F25K42T-E/SSVAO offers 32 KB Flash for LIN stacks plus application code, hardware UART with auto-baud, and PPS for routing the LIN line to any GPIO. The XLP nanoWatt sleep current (typ. < 1 uA in retention) and DMA allow the node to wake only on LIN activity or sensor interrupt, preserving battery life in always-on architectures. AEC-Q100 qualification and -40 C to +125 C range meet underhood and cabin deployment.
Recommended
Automotive LED Lighting Modules
The PIC18F25K42T-E/SSVAO drives tail-light, indicator, and interior LED modules through its 16-bit PWM, Complementary Waveform Generator (CWG), and Hardware Limit Timer (HLT) for fault handling. CIPs let the MCU dim and detect open/short faults without CPU wakeups, meeting ISO 7637 and AEC-Q100 reliability expectations. The 5.5 V VDD rail accepts pre-regulated 5 V from the BCM and the small 28-SSOP footprint (5.30 mm width) fits tight lamp-head PCBAs.
Recommended
HVAC Blower and Stepper Control
For HVAC blower speed and mode-door control, the PIC18F25K42T-E/SSVAO offers 16-bit PWM for blower drive plus CLC/CWG for stepper pulse sequencing without CPU load. The 12-bit ADC2 with Computation averages tach feedback and detects stall conditions, while CIPs debounce limit switches in hardware. AEC-Q100 and -40 C to +125 C guarantee operation behind the dashboard under thermal stress.
Recommended
Industrial Sensor Interface Board
Industrial sensors and field instruments benefit from the PIC18F25K42T-E/SSVAO's 12-bit differential ADC2 with oversampling and CRC/Memory Scan for firmware integrity verification. With 2.3-5.5 V supply flexibility and 32 KB Flash, the same part runs 4-20 mA loop-side analog processing as well as HART or Modbus slave stacks. PPS simplifies PCB routing when assigning SPI, UART, or I2C to non-default pins on the 28-SSOP package.
Recommended
Battery-Powered IoT Edge Node
For non-automotive IoT nodes, the PIC18F25K42T-E/SSVAO operates from a single 3 V coin cell at nanoWatt XLP sleep currents of < 100 nA (retention + RTC), waking only for scheduled sensor reads via RTCC and ADC2 with DMA. The 64 MHz CPU bursts through transmit/receive events and returns to sleep, while 32 KB Flash hosts an RTOS-free cooperative scheduler plus secure boot loader. CLC and CWG drive status LEDs and buzzers without waking the core.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F25K42T-E/SSVAO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F25K42-E/SSVAO | PIC18F25K42T-E/SS | PIC18F25K42-I/SS | PIC18F25K40-E/SSVAO | PIC18F25K40T-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP (5.30 mm / 0.209") | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same |
| Family | PIC18F25K42 (K42, AEC-Q100) | PIC18F25K42 (K42, AEC-Q100) | PIC18F25K42 (K42, industrial) | PIC18F25K42 (K42, industrial) | PIC18F25K40 (K40, AEC-Q100) | PIC18F25K40 (K40, industrial) |
| Program Flash | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB (per K40 datasheet) | 2 KB (per K40 datasheet) |
| Maximum CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Temperature | -40 C to +125 C (AEC-Q100) | -40 C to +125 C (AEC-Q100) | -40 C to +125 C (extended, industrial) | -40 C to +85 C (industrial) | -40 C to +125 C (AEC-Q100) | -40 C to +85 C (industrial) |
| Core Independent Peripherals | CLC, CWG, HLT, WWDT, CRC/Memory Scan, PPS, DMA, ADC2 | Same as this part | Same as this part | Same as this part | PPS, WWDT, CWG, CRC; no CLC/HLT/DMA/ADC2 | PPS, WWDT, CWG, CRC; no CLC/HLT/DMA/ADC2 |
| Packaging / Shipping | Tape & Reel ("T" trailer) | Tray / Tube (no "T") | Tape & Reel (no "VAO") | Tube (industrial, no trailer) | Tray / Tube (K40 die) | Tape & Reel (K40 die, industrial) |
Key Differentiators
- Newest K42 die with DMA and ADC2 Computation engine (vs PIC18F25K40-E/SSVAO)
- AEC-Q100 automotive qualification built-in (vs PIC18F25K42-I/SS)
- Configurable Logic Cells (CLC) for hardware glue logic (vs PIC18F25K25 family)
- Tape-and-reel packaging for SMT lines ("T" trailer) (vs PIC18F25K42-E/SSVAO)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 3 mm of VDD (pin 19) and a bulk aluminum/poly cap on the same net at the PCB entrance. For noise-sensitive ADC applications, add a 100 nF + 10 uF decoupling pair on AVSS/AVDD if used, and a ferrite bead in series. The XLP sleep current of < 1 uA in retention mode (per Microchip datasheet DS40001869) assumes VBAT is connected only when needed; leaving VBAT floating saves ~50 nA.
Route the ICSP clock and data lines (RB6/ICSPCLK, RB7/ICSPDAT) directly to a 6-pin header with no series resistors unless your debugger requires them; series resistors degrade edge rates and can break ICD. Keep the trace to MCLR (pin 28) short (< 25 mm) and place the MCLR pull-up resistor (typ. 10 kOhm) within 5 mm of the pin to ensure robust reset behavior in noisy automotive environments.
Do not forget to lock the PPS peripheral (PPSLOCK bit) before entering long sleep periods; otherwise a brown-out or watchdog reset can remap peripherals mid-session and crash the firmware. Configure all unused pins as outputs driven low (not high-Z) to minimize SMD pin leakage on the 28-SSOP package. Avoid leaving the ADC inputs floating - tie unused analog pins to AVSS via a 10 kOhm resistor.
For SPI buses > 50 mm in length, place a 33 Ohm series resistor at the driver end to reduce ringing on SCK/MOSI. The 28-SSOP package's lead inductance (~7 nH per pin) can otherwise produce ~1 V overshoot on rising edges when driving a long trace into a capacitive load. Keep the SPI clock trace at least 2x trace-width away from analog traces (e.g., ADC inputs) to minimize digital crosstalk.
Compliance Information
AEC-Q100 qualified per "VAO" suffix; RoHS/REACH compliant per Microchip product page; halogen-free status not stated in retrieved web data.
