PIC18F46K40-E/MV - 8-Bit 64MHz MCU 64KB Flash 40-UQFN
MPN: PIC18F46K40-E/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.32 | $232.00 |
| 500 | $2.08 | $1,040.00 |
| 1,000 | $1.86 | $1,860.00 |
PIC18F46K40-E/MV Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash), data memory (RAM), non-volatile storage (EEPROM), and a rich peripheral set (ADC, timers, communication interfaces, GPIO). PIC18 MCUs use Microchip's enhanced Harvard architecture with a modified RISC instruction set, balancing deterministic interrupt response, low power consumption, and 5V tolerance for industrial and consumer designs. The PIC18F46K40-E/MV supports both 5V and 3.3V operation through its wide VDD range.
Key features include a 10-bit ADC with Computation (ADC2) providing automated averaging, threshold comparison, and hardware oversampling, plus a 5-bit DAC and multiple comparators. The device supports up to 36 I/O pins via Peripheral Pin Select, allowing user-defined digital function mapping. Integrated peripherals include multiple PWM/CCP/CWG channels, UART, SPI, I2C, and the eXtreme Low Power (XLP) technology with typical sleep currents below 50 nA, extending battery life in portable applications.
The architecture combines the PIC18 CPU core running up to 64 MHz (16 MIPS) with extensive Core Independent Peripherals (CIPs) that operate autonomously, reducing firmware complexity. The instruction set is C-optimized and supported by Microchip's MPLAB X IDE, XC8 compiler, and MPLAB Code Configurator (MCC). In-system programming via ICSP and on-chip debug over ICD make development and field updates straightforward, supporting rapid prototyping through volume production.
Typical applications include industrial sensor conditioning (analog front-end plus decision logic), home appliance control (washing machines, induction cookers, HVAC), low-power IoT edge nodes with battery backup, automotive body/comfort modules, and human-machine interface (HMI) panels. The wide operating voltage range (2.3V-5.5V) and rich peripheral mix make it a strong general-purpose 8-bit MCU choice.
When designing, verify VDD decoupling and 10 uF bulk capacitance near the analog supply pins to minimize ADC noise. Take advantage of Peripheral Pin Select to route digital functions to convenient pins, simplifying PCB layout. Use the ADC2 Computation mode for hardware-averaged, threshold-filtered conversions to offload CPU and reduce firmware timing jitter.
This page synthesizes verified distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for PIC18F46K40-E/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 PIC18F46K40-E/MV (same form factor and footprint) — differing in Comparators, I/O Pins, Package, ADC, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F46K40-I/MV
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.15 / Unit
View Datasheet →PIC18F46K40-E/ML
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →PIC18F47K40-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF46K40-I/MV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F45K40-I/MV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F46K42-I/MV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F46K40-E/MV Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18, 8-bit RISC |
| Maximum CPU Frequency | 64 MHz |
| Program Memory (Flash) | 64 KB (32K x 16 words) |
| Data SRAM | 3.7 KB |
| Data EEPROM | 1 KB (256 bytes per DigiKey; 1 KB per datasheet family - confirm) |
| Supply Voltage (VDD) | 2.3 V to 5.5 V |
| Operating Temperature | -40 C to +125 C (E = extended) |
| Package | 40-pin UQFN (5x5 mm) |
| I/O Pins | 36 (with Peripheral Pin Select) |
| ADC | 10-bit ADC2 with Computation, multiple channels |
| DAC | 5-bit DAC |
| Comparators | Yes (multiple) |
| Timers | Multiple 8-bit and 16-bit timers |
| PWM / CCP / CWG | PWM, CCP, Complementary Waveform Generator |
| Communication | UART, SPI, I2C |
| Windowed Watchdog | WWDT |
| CRC / Memory Scan | Yes |
| XLP (eXtreme Low Power) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| RoHS | Compliant |
PIC18F46K40-E/MV Pin Configuration
| Pin 1 | RA2/AN2 — Port A bit 2 / ADC channel 2 |
| Pin 2 | RA3/AN3 — Port A bit 3 / ADC channel 3 |
| Pin 3 | RA4/AN4 — Port A bit 4 / ADC channel 4 |
| Pin 4 | RA5/AN5 — Port A bit 5 / ADC channel 5 |
| Pin 5 | RA6/AN6 — Port A bit 6 / ADC channel 6 |
| Pin 6 | RA7/AN7 — Port A bit 7 / ADC channel 7 |
| Pin 7 | VSS — Ground |
| Pin 8 | VDD — Positive supply voltage |
| Pin 9 | OSC1/RA1 — Crystal oscillator input / Port A bit 1 |
| Pin 10 | OSC2/RA0 — Crystal oscillator output / Port A bit 0 |
| Pin 11 | RC0 — Port C bit 0 |
| Pin 12 | RC1 — Port C bit 1 |
| Pin 13 | RC2 — Port C bit 2 |
| Pin 14 | RC3 — Port C bit 3 |
| Pin 15 | RC4 — Port C bit 4 |
| Pin 16 | RC5 — Port C bit 5 |
| Pin 17 | RC6 — Port C bit 6 |
| Pin 18 | RC7 — Port C bit 7 |
| Pin 19 | VSS — Ground |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0 — Port B bit 0 |
| Pin 22 | RB1 — Port B bit 1 |
| Pin 23 | RB2 — Port B bit 2 |
| Pin 24 | RB3 — Port B bit 3 |
| Pin 25 | RB4 — Port B bit 4 |
| Pin 26 | RB5 — Port B bit 5 |
| Pin 27 | RB6/PGC — Port B bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — Port B bit 7 / ICSP data |
| Pin 29 | RE0 — Port E bit 0 |
| Pin 30 | RE1 — Port E bit 1 |
| Pin 31 | RE2 — Port E bit 2 |
| Pin 32 | RE3 — Port E bit 3 |
| Pin 33 | RD0 — Port D bit 0 |
| Pin 34 | RD1 — Port D bit 1 |
| Pin 35 | RD2 — Port D bit 2 |
| Pin 36 | RD3 — Port D bit 3 |
| Pin 37 | RD4 — Port D bit 4 |
| Pin 38 | RD5 — Port D bit 5 |
| Pin 39 | RD6 — Port D bit 6 |
| Pin 40 | RD7 — Port D bit 7 |
| Pin EP | EP — Exposed thermal pad - connect to VSS for thermal/ground reference |
Typical Applications
PIC18F46K40-E/MV is suitable for 6 applications: Industrial Sensor Conditioning, Home Appliance Control, Battery-Powered IoT Edge Nodes, Automotive Body and Comfort Modules, Human-Machine Interface (HMI) Panels, Capacitive Touch User Interface.
Industrial Sensor Conditioning
The PIC18F46K40-E/MV suits industrial sensor conditioning hubs where multiple analog inputs must be digitized and acted on deterministically. Its 10-bit ADC2 with hardware averaging reduces firmware-side filtering overhead, while CLC and CWG peripherals handle pulse shaping and complementary drive signals without CPU intervention, freeing the core for higher-level communication (UART, SPI, I2C) to the host PLC. With 36 I/O pins and Peripheral Pin Select, board layout flexibility is high. Operating from 2.3 V to 5.5 V at -40 C to +125 C, the MCU tolerates factory-floor voltage transients and temperature swings while the XLP sleep current under 50 nA suits battery-backed sensor nodes.
Recommended
Home Appliance Control
Washing machines, induction cookers, and HVAC controllers benefit from the PIC18F46K40-E/MV's CWG (Complementary Waveform Generator) for motor and IGBT drive, PWM channels for fan/valve control, and zero-cross detect for AC line synchronization. The 64 KB Flash handles state-machine firmware plus display routines, while CRC/Memory Scan ensures firmware integrity for safety-critical applications. Wide VDD (2.3 V to 5.5 V) allows direct 5 V operation alongside 3.3 V peripherals. The extended -40 C to +125 C grade covers appliance under-cabinet thermal environments.
Recommended
Battery-Powered IoT Edge Nodes
The PIC18F46K40-E/MV is well-suited for IoT edge nodes running on coin-cell or lithium battery thanks to its XLP technology with sub-50 nA sleep current and multiple low-power modes. The MCU wakes on RTC, ADC threshold, or external interrupt, executes sensor read or wireless transmission, then returns to sleep, achieving multi-year battery life. CWG can drive piezo buzzers for alerts without waking the CPU. Core Independent Peripherals handle deterministic timing, allowing the firmware to stay in sleep longer. The integrated 5-bit DAC enables analog output for sensor calibration or bias generation.
Recommended
Automotive Body and Comfort Modules
PIC18F46K40-E/MV with extended -40 C to +125 C grade targets automotive body/comfort modules like seat controllers, mirror adjusters, and ambient lighting. CAN or LIN networks can be implemented with an external transceiver; the MCU provides UART for LIN communication. The 64 KB Flash supports CAN/LIN state machines plus diagnostic handlers. CWG drives LED strings for interior lighting with hardware-based PWM dimming, and CLC implements state-based logic without CPU load. Windowed Watchdog Timer (WWDT) supports ASIL-aware system design when paired with an external supervisor.
Recommended
Human-Machine Interface (HMI) Panels
For HMI panels with character LCD, segment LCD, or LED indicators, the PIC18F46K40-E/MV delivers Peripheral Pin Select flexibility to map display data lines to convenient package pins, simplifying PCB routing. The MCU's 36 I/O accommodate keypads, rotary encoders, and status LEDs. Core Independent Peripherals (CLC, CWG) handle button debounce and LED dimming in hardware, reducing firmware complexity. UART and SPI provide communication to a host controller, and CRC/Memory Scan catches firmware corruption in field-deployed panels.
Recommended
Capacitive Touch User Interface
The PIC18F46K40-E/MV's Hardware CVD (Capacitive Voltage Divider) peripheral supports up to 24 touch channels with hardware-based touch detection, reducing or eliminating firmware touch libraries and easing EMC compliance. Combined with CLC for haptic feedback control via CWG, the MCU delivers a complete touch + LED + haptic user interface in a single 40-UQFN device. eXtreme Low Power keeps quiescent current minimal between touches. Designers benefit from Microchip's mTouch reference designs and the Microchip Code Configurator plugin for rapid touch UI development.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F46K40-E/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F46K40-I/MV | PIC18F47K40-I/MV | PIC18F45K40-I/MV |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-UQFN (5x5 mm) | 40-UQFN (5x5 mm) - same | 40-UQFN (5x5 mm) - same | 40-UQFN (5x5 mm) - same |
| Flash Program Memory | 64 KB | 64 KB - same | 128 KB (+100%) | 32 KB (-50%) |
| Data SRAM | 3.7 KB | 3.7 KB - same | ~4 KB | 2 KB |
| Maximum CPU Frequency | 64 MHz | 64 MHz - same | 64 MHz - same | 64 MHz - same |
| Operating Temperature | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| Operating Voltage (VDD) | 2.3 V to 5.5 V | 2.3 V to 5.5 V - same | 2.3 V to 5.5 V - same | 2.3 V to 5.5 V - same |
| I/O Pins | 36 | 36 - same | 36 - same | 36 - same |
| Core Independent Peripherals | CLC, CWG, WWDT, CRC/Scan, CVD | Same set | Same set | Same set |
| XLP Low-Power Support | Yes | Yes - same | Yes - same | Yes - same |
Key Differentiators
- Extended -40 C to +125 C operating temperature in 40-UQFN (vs PIC18F46K40-I/MV)
- Optimized 64 KB Flash with full CIP peripheral set (vs PIC18F47K40-I/MV (128 KB))
- Hardware CVD capacitive touch with 24 channels (vs PIC18F45K40-I/MV)
Design Notes
Place a single 100 nF ceramic decoupling capacitor as close as possible to each VDD pin (the 40-UQFN has multiple VDD pins: pins 8 and 20). Add a bulk 10 uF tantalum or ceramic capacitor on the main 5 V rail near the MCU. For designs that switch between 5 V and 3.3 V operation, ensure the AVDD pin (when used) tracks VDD with a small ferrite bead or 0 ohm link, and add 100 nF on AVDD to reduce ADC noise. XLP sleep current is typically under 50 nA with RTCC running - verify with your chosen peripherals disabled in firmware.
Always configure the unused I/O pins as digital outputs driving low (or as inputs with internal pull-ups enabled) to minimize supply current. Forgetting to disable unused peripherals before entering sleep mode can add several microamps of leakage. When using the ADC2 Computation mode, ensure the ADC clock is set within datasheet limits (typically Fosc/2 to Fosc/64 depending on speed grade) - overspec'd ADC clocks corrupt conversion results and waste CPU cycles on retries.
The 40-UQFN (5x5 mm) package has an exposed thermal pad (EP) on the underside - solder it to a continuous VSS copper pour on the top layer to provide both thermal relief and low-impedance ground return. Pin 1 is located by the dot marker; route the ICSP clock (PGC) and data (PGD) traces (RB6/RB7) to a 6-pin ICSP header with minimal stub lengths and away from switching signals to avoid debugger coupling issues. Use a 4-layer stackup with dedicated ground plane for best EMI performance on motor-drive and capacitive-touch designs.
Compliance Information
RoHS and REACH compliance per Microchip product page. AEC-Q100 not explicitly listed for this part number - use automotive-qualified PIC18 K40 variants with explicit Q100 suffix for production automotive programs.
