PIC18F57K42T-I/MV - 64MHz 8-Bit 128KB Flash MCU | Microchip
MPN: PIC18F57K42T-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.55 | $35.50 |
| 100 | $3.1 | $310.00 |
| 500 | $2.78 | $1,390.00 |
| 1,000 | $2.45 | $2,450.00 |
PIC18F57K42T-I/MV Overview
A microcontroller (MCU) is a single-chip computer that contains a CPU core, program and data memory, peripherals, and I/O. The PIC18 architecture is an enhanced 8-bit Harvard RISC core with a hardware multiplier, 31-level stack, and vectored interrupts. The XLP (eXtreme Low Power) designation indicates this family is engineered for battery-powered and energy-harvesting designs, drawing nano-amp currents in Sleep mode.
Key features include a 12-bit ADC2 with up to 35 external channels and 140 ksps throughput, hardware CVD (Capacitive Voltage Divider), DMA, vector interrupts, multiple UART/SPI/I2C interfaces, configurable PWM, comparators, DAC outputs, and an 8-bit core-independent peripheral set. The 64MHz internal oscillator, programmable prescaler, and 4x PLL provide flexible clocking. Operating voltage spans 2.3V to 5.5V with industrial -40C to +85C support.
The K42 architecture integrates Direct Memory Access (DMA) into the 8-bit core, allowing data movement between peripherals and memory without CPU intervention. The ADC2 module adds hardware oversampling, averaging, and threshold comparisons so analog signal conditioning runs autonomously. Hardware CVD enables robust touch and proximity sensing.
Typical applications include IoT sensor nodes, home appliances, motor control, LED lighting, capacitive touch user interfaces, industrial control, USB device functions, and battery-powered metering. The wide peripheral set makes the device suitable as a system-on-chip in cost-sensitive designs.
When designing with this MCU, allocate decoupling capacitors close to each VDD pin, follow Microchip's UQFN PCB layout recommendations for the exposed pad, and use the MPLAB X IDE with the XC8 compiler. Verify signal integrity on high-speed communication lines and refer to Microchip ANs for DMA and ADC2 usage.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical engineering design notes not found in the manufacturer datasheet alone, offering actionable intelligence for sourcing and design decisions.
Drop-in alternatives for PIC18F57K42T-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 PIC18F57K42T-I/MV (same form factor and footprint) — differing in Package, Program Memory (Flash), ADC, Communication, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F57K42-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F57K42T-I/MVVAO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F55K42T-I/MV
✅ Drop-In✓ In Stock
$1.65 / Unit
View Datasheet →PIC18F56K42T-I/MV
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC18F57K42-E/MV
✅ Drop-In✓ In Stock
$3.2 / Unit
View Datasheet →PIC18F57K42T-I/MV Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit RISC |
| CPU Speed | 64 MHz (4x PLL from 16 MHz HFINTOSC) |
| Program Memory (Flash) | 128 KB (64K x 16) |
| SRAM | 8 KB |
| EEPROM | 256 B |
| Package | 48-pin UQFN (MV) 6x6 mm with exposed pad |
| Operating Voltage | 2.3 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| ADC | 12-bit ADC2, up to 35 channels, 140 ksps |
| DAC Outputs | Yes (5-bit and 12-bit) |
| Comparators | Yes |
| PWM Channels | Configurable, multiple channels |
| DMA | Yes |
| Communication | UART, SPI, I2C, DMA-compatible |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F57K42T-I/MV 48-pin uqfn (mv) 6x6 mm with exposed pad Pin Configuration Guide
Pin configuration for PIC18F57K42T-I/MV (48-pin uqfn (mv) 6x6 mm with exposed pad package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC18F57K42T-I/MV.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC18F57K42T-I/MV is suitable for 6 applications: IoT Sensor Nodes and Wireless Endpoints, Home Appliance Control Boards, Capacitive Touch User Interfaces, LED Lighting and Smart Drivers, Industrial Control and Motor Drives, USB Device and Consumer Peripherals.
IoT Sensor Nodes and Wireless Endpoints
The PIC18F57K42T-I/MV's XLP nano-Watt Sleep currents (down to nanoamp levels), 12-bit ADC2 with autonomous Sleep-mode sampling, and DMA-driven peripheral operation make it ideal for battery-powered IoT sensor nodes. With 128KB Flash it can host wireless protocol stacks (LoRa, BLE HCI, sub-GHz proprietary), while the 8KB SRAM buffers sensor data and 256B EEPROM stores calibration and node identity. Operating from 2.3V to 5.5V, the device runs directly from two AA cells or a single Li-ion cell. Engineers typically pair it with an SPI radio module, using DMA to move radio packets without CPU wakeup, extending battery life to multi-year horizons in metering and environmental monitoring applications.
Recommended
Home Appliance Control Boards
The PIC18F57K42T-I/MV delivers robust control for washing machines, dishwashers, refrigerators, and induction cooktops where the 128KB Flash hosts user-interface state machines and motor-control algorithms. The 12-bit ADC2 reads multiple sensor channels (temperature, current, voltage) while the configurable PWM drives BLDC or universal motors. With 35 ADC channels the device interfaces to user keypads via hardware CVD (Capacitive Voltage Divider) for touch controls, and the DMA engine handles UART communication with display modules without CPU overhead. The 48-pin UQFN 6x6mm footprint enables compact PCB layouts typical in modern appliance main boards.
Recommended
Capacitive Touch User Interfaces
The PIC18F57K42T-I/MV's hardware CVD module enables robust capacitive touch sensing for human-machine interfaces in consumer electronics, white goods, and industrial control panels. CVD automatically compensates for temperature drift and PCB parasitic capacitance, allowing reliable touch button, slider, and wheel implementations. With 35 ADC channels, designers can implement large touch panels without external touch controllers. The 128KB Flash stores mTouch reference firmware, while DMA offloads touch scanning to peripheral hardware, freeing CPU cycles for HMI logic. Operating voltage flexibility (2.3V to 5.5V) simplifies integration into both 3.3V and 5V user-interface boards.
Recommended
LED Lighting and Smart Drivers
The PIC18F57K42T-I/MV powers next-generation smart LED drivers with its configurable PWM channels (multiple 16-bit PWMs), 12-bit DAC for analog dimming, and UART/SPI/I2C interfaces for DALI, DMX, or wireless control receivers. The 128KB Flash accommodates DALI-2 protocol stacks and color-mixing algorithms. DMA autonomously updates PWM duty cycles for smooth color transitions without CPU jitter, while the 2.3V minimum supply supports direct battery or USB-C input. Industrial temperature grade (-40C to +85C) and low Sleep current support always-on standby modes required by smart-lighting standards.
Recommended
Industrial Control and Motor Drives
Industrial PLCs, variable-frequency drives, and stepper/servo controllers benefit from the PIC18F57K42T-I/MV's deterministic 64MHz performance, 12-bit ADC2 for current/voltage feedback, and configurable PWMs for motor commutation. The K42 DMA engine handles high-speed ADC sampling for field-oriented control (FOC) loops without CPU intervention. UART/SPI/I2C ports interface to industrial transceivers, while the 128KB Flash fits motor-control libraries and the 8KB SRAM supports real-time control loops. The 48-pin UQFN package suits compact inverter modules. Industrial -40C to +85C operation supports factory-floor deployment.
Recommended
USB Device and Consumer Peripherals
The PIC18F57K42T-I/MV's 128KB Flash accommodates USB device class firmware (HID, CDC, vendor-class) and application stacks. The 8KB SRAM buffers USB endpoints while DMA maintains data flow between USB and memory without CPU overhead. Multiple UART/SPI/I2C peripherals let designers add wireless (BLE, WiFi) modules, displays, or sensors in composite USB devices. Operating from 5V USB VBUS directly, the MCU simplifies power architecture in USB peripherals, dongles, and accessories. The 48-pin UQFN 6x6mm footprint integrates cleanly into compact dongle designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F57K42T-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F57K42-I/MV | PIC18F55K42T-I/MV | PIC18F56K42T-I/MV | PIC18F57K42-E/MV |
|---|---|---|---|---|---|
| Package | 48-pin UQFN (MV) 6x6mm | 48-pin UQFN (MV) 6x6mm - same | 48-pin UQFN (MV) 6x6mm - same | 48-pin UQFN (MV) 6x6mm - same | 48-pin UQFN (MV) 6x6mm - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Flash | 128 KB | 128 KB | 64 KB (-50%) | 64 KB (-50%) | 128 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| 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 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (Extended) |
| Packaging | Tape and Reel | Tray | Tape and Reel | Tape and Reel | Tray |
Key Differentiators
- Largest Flash in 48-pin UQFN K42 family (vs PIC18F55K42T-I/MV)
- Identical silicon in tray packaging (vs PIC18F57K42-I/MV)
- Extended temperature grade option (vs PIC18F57K42-E/MV)
Design Notes
The 48-pin UQFN 6x6mm package features an exposed thermal pad (EP) on the underside that MUST be soldered to the PCB ground plane for proper thermal and electrical performance. Use an array of thermal vias (typically 9-16 vias in a 3x3 or 4x4 grid) under the EP to conduct heat into inner ground planes. Place 100nF decoupling capacitors close to each VDD/VDDIO pin pair, with a 10uF bulk capacitor near the MCU. Follow Microchip AN2484 (UQFN PCB layout) and the K42 family errata for land pattern recommendations.
Estimated: Total power consumption at 64 MHz with all peripherals active is approximately 15 mA at 3.3V (49.5 mW). In Sleep mode with ADC2 disabled, the K42 draws less than 1 uA (XLP Sleep). For battery-powered designs, use Sleep mode aggressively and leverage DMA + ADC2-in-Sleep for autonomous sensor sampling. Place the MCU on a separate analog/digital power island if ADCs are used, with ferrite beads isolating the AVDD from VDD.
Three common pitfalls when designing with the PIC18F57K42T-I/MV: (1) The UQFN EP must be soldered - skip it and the device will overheat and behave erratically. (2) The ADC2 has a separate AVDD/AVSS pair that must be powered even if ADC is unused - tie it to VDD/VSS. (3) The HFINTOSC tolerance is +/- 2% typical; for UART timing accuracy, use a calibrated HFINTOSC value or an external crystal. Refer to Microchip MPLAB X IDE documentation for OSCFRQ tuning and ANs for ADC2 in-Sleep operation.
Compliance Information
RoHS and lead-free per Microchip product environmental compliance. Not AEC-Q100 qualified as standard; for automotive applications use the -VAO ordering code variant. REACH compliance confirmed via Microchip product page.
