PIC18F25K42T-I/MV - 8-bit MCU, 32KB Flash, 64MHz, 28-UQFN | Microchip
MPN: PIC18F25K42T-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.45 | $14.50 |
| 100 | $1.28 | $128.00 |
| 500 | $1.12 | $560.00 |
| 1,000 | $0.96 | $960.00 |
| 3,300 | $0.86 | $2,838.00 |
PIC18F25K42T-I/MV Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path CPU, on-chip Flash program memory, RAM, EEPROM, and a rich set of peripherals. Within the broader classification, an MCU belongs to microcontrollers, then to embedded processors, then to semiconductors. The PIC18 family uses an enhanced Harvard RISC architecture with 16-bit instructions, giving the PIC18F25K42 family a balance of code density, deterministic interrupt response, and ease of programming in C or assembly.
Key features include eXtreme Low Power (XLP) technology with nanoWatt sleep currents, multiple idle/doze/peripheral module disable modes, hardware DMA that offloads ADC and memory-to-memory transfers from the CPU, and functional-safety diagnostics including WWDT, CRC/SCAN, windowed watchdog, and hardware limit timer (HLT). It also offers up to 25mA source/sink on I/O, supporting direct LED drive.
Typical applications include low-power IoT sensor nodes, battery-powered consumer devices, home appliances, industrial control and monitoring, LED lighting controllers, and automotive body electronics subsystems (via the automotive-grade PIC18F25K42T-I/MVVAO). The wide operating voltage range and rich peripheral set make it well-suited to mixed-signal designs.
When designing with this device, pay attention to the UQFN-28 thermal pad layout. Place a low-impedance ground via array directly under the exposed pad, follow Microchip's UQFN land pattern exactly, and budget for 64MHz operation only across the full 2.3V-5.5V supply range.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a one-stop comparison resource for the PIC18F25K42 family.
Drop-in alternatives for PIC18F25K42T-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 PIC18F25K42T-I/MV (same form factor and footprint) — differing in Comparators, Package, Program Memory (Flash), ADC, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F25K42-I/MV
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC18LF25K42T-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F25K42-E/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F25K42T-I/MVVAO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F24K42T-I/MV
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC18F25K42T-I/MV Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit RISC |
| Maximum CPU Frequency | 64 MHz |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 2 KB |
| Data EEPROM | 256 B |
| Package | 28-pin UQFN (MV) 4x4 mm |
| Operating Voltage Range | 2.3 V to 5.5 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| ADC | 12-bit ADC2 with Computation, up to 24 channels |
| DAC | 5-bit DAC |
| Comparators | Yes |
| DMA Channels | Yes (hardware DMA) |
| PWM Modules | Yes (CCP, 10-bit PWM) |
| CLC | Configurable Logic Cells |
| CWG | Complementary Waveform Generator |
| Communication Peripherals | UART, SPI, I2C |
| PPS | Peripheral Pin Select |
| XLP Technology | Yes (eXtreme Low Power) |
| Watchdog Timer | WWDT with Window |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F25K42T-I/MV Pin Configuration
| Pin 1 | RA0/AN0 — Bidirectional I/O / Analog input 0 / DAC1 output |
| Pin 2 | RA1/AN1 — Bidirectional I/O / Analog input 1 |
| Pin 3 | RA2/AN2 — Bidirectional I/O / Analog input 2 |
| Pin 4 | RA3/AN3 — Bidirectional I/O / Analog input 3 / VREF+ |
| Pin 5 | RA4/AN4 — Bidirectional I/O / Analog input 4 |
| Pin 6 | RA5/AN5 — Bidirectional I/O / Analog input 5 |
| Pin 7 | RA6/AN6 — Bidirectional I/O / Analog input 6 |
| Pin 8 | RA7/AN7 — Bidirectional I/O / Analog input 7 |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage (2.3-5.5 V) |
| Pin 11 | RB0/AN8 — Bidirectional I/O / Analog input 8 |
| Pin 12 | RB1/AN9 — Bidirectional I/O / Analog input 9 |
| Pin 13 | RB2/AN10 — Bidirectional I/O / Analog input 10 |
| Pin 14 | RB3/AN11 — Bidirectional I/O / Analog input 11 |
| Pin 15 | RB4/AN12 — Bidirectional I/O / Analog input 12 |
| Pin 16 | RB5/AN13 — Bidirectional I/O / Analog input 13 |
| Pin 17 | RB6/ICSPCLK — Bidirectional I/O / ICD clock |
| Pin 18 | RB7/ICSPDAT — Bidirectional I/O / ICD data |
| 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 | RE3/MCLR — Input only / Master Clear (reset) |
| Pin 28 | VSS/EP — Ground / Exposed thermal pad (must be soldered to ground) |
Typical Applications
PIC18F25K42T-I/MV is suitable for 7 applications: Low-Power IoT Sensor Nodes, Home Appliance Control Boards, LED Lighting Controllers, Industrial Sensor and Process Monitoring, Automotive Body Electronics (AEC-Q100), Consumer Battery Chargers, USB HID Peripherals and Custom Input Devices.
Low-Power IoT Sensor Nodes
The PIC18F25K42T-I/MV is an ideal host for battery-powered wireless sensor nodes thanks to its XLP nanoWatt sleep currents below 50 nA with RTCC running and the 12-bit ADC2 with Computation that can autonomously scan and threshold-detect sensor inputs without waking the CPU. The integrated DMA offloads ADC result buffering directly to RAM, allowing the core to stay in deep sleep until a threshold violation occurs. Its 2 KB RAM comfortably holds sensor fusion buffers for BLE/Zigbee stack fragments, and the UQFN-28 4x4 mm footprint fits inside coin-cell form factors. Combined with hardware CLC for wake-event glue logic, the design achieves years of battery life on a single CR2032.
Recommended
Home Appliance Control Boards
In washing machines, dishwashers, and HVAC controllers, the PIC18F25K42T-I/MV provides 24 ADC channels for temperature, humidity, and motor current sensing, plus PWM/CCP modules for triac and brushless DC motor phase control. The 5-bit DAC drives reference voltages for analog front-ends, while CLC implements safety interlocks in hardware without software latency. The 32 KB Flash accommodates full state-machine plus user-interface code in C, and the 256 B EEPROM stores calibration and cycle-count data with 10K write endurance. Microchip's MPLAB Code Configurator generates the peripheral init code, shortening time-to-prototype for white-goods designs.
Recommended
LED Lighting Controllers
The PIC18F25K42T-I/MV drives multi-channel LED strings with up to 25 mA source/sink per I/O directly, eliminating external drivers in compact decorative lighting. The Complementary Waveform Generator (CWG) produces dead-band-controlled complementary PWM outputs for high-efficiency half-bridge LED drivers, while the 12-bit ADC provides closed-loop current feedback for constant-luminosity regulation. Its 2.3-5.5 V supply range covers both 3.3 V digital logic and 5 V analog LED strings. The CLC and PPS allow reconfiguring I/O mapping without PCB changes, supporting platform designs for tunable-white and RGBW luminaires.
Recommended
Industrial Sensor and Process Monitoring
The PIC18F25K42T-I/MV serves industrial 4-20 mA loop-powered transmitters and Modbus RTU slave sensors with its hardware UART, 12-bit ADC2, and CRC/SCAN diagnostics. The peripheral pin select (PPS) routes UART/SPI/I2C to any digital pin, simplifying PCB routing in space-constrained sensor enclosures. Hardware DMA streams ADC samples into RAM while the CPU executes Modbus stack, achieving deterministic update rates above 1 kHz. Functional safety features (WWDT, CRC, windowed watchdog) meet IEC 61508 SIL-1 capable applications when paired with appropriate firmware architecture and the -40 C to +85 C industrial temperature range.
Recommended
Automotive Body Electronics (AEC-Q100)
For non-safety automotive body modules such as seat controllers, mirror adjusters, ambient lighting, and HVAC flaps, the PIC18F25K42T-I/MV provides the right balance of peripherals and AEC-Q100 qualification via the PIC18F25K42T-I/MVVAO automotive-grade variant. Its CAN-capable 8-bit core handles LIN slave communication, while the 12-bit ADC reads position sensors and the PWM drives small DC motors. The -40 C to +125 C extended temperature range (E grade) and automotive PPAP documentation support direct OEM deployment.
Recommended
Consumer Battery Chargers
The PIC18F25K42T-I/MV's 12-bit ADC2 with Computation monitors charge current and battery voltage with hardware averaging and threshold detection, while CLC implements state-machine logic for CC-CV profile transitions. The 5-bit DAC programs reference voltages for constant-current loops. PWM modules generate switching frequencies for buck/boost topologies, and the 2 KB RAM holds charging profile tables for multi-chemistry support. XLP nanoWatt sleep minimizes standby drain when no device is connected, important for EPA Energy Star compliance.
Recommended
USB HID Peripherals and Custom Input Devices
The PIC18F25K42T-I/MV can be paired with an external USB transceiver (such as the PIC18F25K42's built-in USB via a 25K50 migration or via external MCP2221) to implement HID-class input devices including custom keyboards, game controllers, and industrial pendants. The 32 KB Flash accommodates USB stack plus HID report descriptors, while DMA moves HID reports to the endpoint buffer without CPU intervention. CLC debounces mechanical switches in hardware, freeing timer resources. The UQFN-28 4x4 mm package fits inside compact handheld enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F25K42T-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F25K42-I/MV | PIC18LF25K42T-I/MV | PIC18F25K42-E/MV | PIC18F25K42T-I/MVVAO | PIC18F24K42T-I/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-UQFN (MV) 4x4 mm | 28-UQFN (MV) 4x4 mm - same | 28-UQFN (MV) 4x4 mm - same | 28-UQFN (MV) 4x4 mm - same | 28-UQFN (MV) 4x4 mm - same | 28-UQFN (MV) 4x4 mm - same |
| Program Memory (Flash) | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB |
| Operating Voltage Range | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (Extended) | -40 C to +125 C (Automotive) | -40 C to +85 C |
| AEC-Q100 Qualified | No (industrial grade) | No | No | No | Yes (automotive grade) | No |
| Maximum CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Packaging Format | Tape & Reel | Tray/Tube | Tape & Reel | Tube | Tape & Reel (automotive) | Tape & Reel |
Key Differentiators
- Hardware DMA offloads ADC and memory-to-memory transfers (vs PIC18F25K22)
- Configurable Logic Cells (CLC) replace external glue logic (vs PIC18F25K40)
- Automotive grade option via VAO suffix variant (vs PIC18F25K42-E/MV (extended temp only))
Design Notes
The 28-pin UQFN (MV) 4x4 mm package has an exposed thermal pad (pin 28) that MUST be soldered to a ground copper pour on the PCB. Recommended land pattern per Microchip: a 2.5x2.5 mm thermal pad with a 5x5 grid of 0.3 mm thermal vias connecting to the inner ground plane. Without this thermal via array, the junction-to-ambient thermal resistance (theta_JA) rises above 80 C/W, limiting the device's ability to dissipate the ~50 mA peak I/O source current at high ambient temperatures.
Estimated: At 64 MHz Fosc with 3.3 V VDD, the PIC18F25K42T-I/MV draws approximately 8 mA active current, rising to 12 mA when ADC and PWM are active. Decouple VDD with a 100 nF X7R ceramic placed within 3 mm of the VDD pin, plus a bulk 4.7 uF tantalum or ceramic on the same supply trace. Place the decoupling capacitor on the same layer as the IC to minimize loop inductance, and route VDD/VSS as a star from the regulator output.
Do not leave the ICSPDAT/ICSPCLK pins (RB6/RB7) floating during normal operation. Although internal pull-ups are present, noise coupling on these pins can trigger false ICD communication attempts or accidental device reset via LVP. For designs not using ICSP, either configure RB6/RB7 as outputs with defined states in firmware or add external 10 kohm pull-ups. The MCLR pin (RE3) requires a 10 kohm pull-up to VDD; do not leave it floating or the device may randomly enter reset.
Use PPS (Peripheral Pin Select) to route UART/SPI/I2C signals to convenient PCB locations without requiring internal crossbar rework. However, note that not all pins support all peripheral functions - consult the PPS input/output mapping table in datasheet DS40001869. For EMI-sensitive designs, place the 32.768 kHz crystal close to SOSC pins with a grounded guard ring, and keep high-speed digital traces (PWM, SPI clock) away from analog input pins to minimize crosstalk into ADC measurements.
Compliance Information
Standard PIC18F25K42T-I/MV is RoHS compliant and lead-free. For AEC-Q100 automotive qualification, use the PIC18F25K42T-I/MVVAO variant. REACH SVHC declaration available from Microchip environmental compliance page.
