PIC18F65K40-I/MR - 8-Bit 64MHz 32KB Flash MCU 64-VQFN | Microchip
MPN: PIC18F65K40-I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.42 | $34.20 |
| 100 | $2.95 | $295.00 |
| 500 | $2.61 | $1,305.00 |
| 1,000 | $2.3 | $2,300.00 |
PIC18F65K40-I/MR Overview
A PIC18 XLP 8-bit microcontroller is a high-performance 8-bit MCU built on an enhanced RISC Harvard architecture with a 16-bit instruction word. PIC18 sits within Microchip's broader 8-bit PIC hierarchy (PIC10/12/14/16/16F1xxx -> PIC18/dsPIC33), itself a node in the wider Microcontroller -> Embedded IC -> Semiconductor category. The XLP (eXtreme Low Power) designation indicates sleep currents below 100 nA typical and active currents in the microamp range, while 5V support permits direct interfacing to legacy analog front-ends without level shifters.
Key features of the PIC18F65K40 family include Core Independent Peripherals (CIP) such as the Complementary Waveform Generator (CWG), Windowed Watchdog Timer (WWDT), CRC/SCAN memory testing, Zero-Cross Detect (ZCD), and hardware Limit Control. Peripherals are mapped through the PPS (Peripheral Pin Select) system, which lets the designer route digital peripherals to a wide choice of I/O pins. Up to four 10-bit ADC channels with computation (ADCC) and dual comparators support analog signal conditioning, while 8-bit/16-bit timer resources and four CCP/ECCP modules handle PWM motor or power-conversion tasks.
From an architecture perspective, the device pairs a high-throughput C-optimized core with nanoWatt XLP power management, enabling battery-aware operation in energy-harvesting or always-on systems. Internal oscillator options up to 64 MHz eliminate external crystals in cost-sensitive designs, and 5V-tolerant digital I/O with independent peripheral functions accelerate BOM consolidation. Integrated mTouch capacitive-touch support makes the part well-suited for human-interface front panels.
Typical applications include low-power industrial sensor nodes with 5V analog signal chains, capacitive-touch human-machine interfaces (HMI), motor control in small appliances and fans, USB-CDC/HID human-interface devices, and general-purpose 5V embedded control with CAN/EEPROM data logging. In each case the 32 KB Flash footprint and 5V-tolerant I/O allow straightforward firmware migration within the PIC18 K40 family.
When designing with this MCU, ensure the chosen VQFN-9x9 footprint provides adequate copper thermal relief - the exposed pad must be soldered to a continuous ground plane for thermal and electrical performance. Verify unused I/O configuration in firmware to avoid floating-pin current leakage, and consult the device-specific silicon errata for ADCC and PPS revisions before locking the PCB layout.
This page synthesizes distributor pricing, drop-in 64-VQFN alternatives, application circuits, and design considerations not aggregated on any single distributor datasheet, giving engineers an information-gain source for PIC18F65K40-I/MR selection and procurement.
Drop-in alternatives for PIC18F65K40-I/MR — 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 PIC18F65K40-I/MR (same form factor and footprint) — differing in Package, ADC, Core Architecture, Core Independent Peripherals, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F65K40T-I/MR
✅ Drop-In✓ In Stock
$1.32 / Unit
View Datasheet →PIC18LF65K40-I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F65K40-E/MR
✅ Drop-In✓ In Stock
$2.32 / Unit
View Datasheet →PIC18F65K40-I/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC18 enhanced Harvard |
| Family | PIC® XLP™ 18K |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data SRAM | 2 KB |
| EEPROM | 256 B |
| Maximum CPU Speed | 64 MHz |
| Operating Voltage | 2.3 V to 5.5 V |
| Package | 64-VQFN (9x9 mm) |
| Pin Count | 64 |
| Operating Temperature | -40C to +85C (Industrial, "I") |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| AEC-Q100 | Not qualified (Industrial grade) |
PIC18F65K40-I/MR Pin Configuration
| Pin 1 | RA0/ANA0/C1IN0-/C2IN0-/CWG1IN/CCP5/INT0/T0CKI — PORTA bit 0 / analog input / comparator / CWG input / CCP5 / external interrupt / timer0 clock |
| Pin 2 | RA1/ANA1/C1IN1-/C2IN1-/CWG2IN/CCP6/INT1 — PORTA bit 1 / analog input / comparator / CWG input / CCP6 / external interrupt |
| Pin 3 | RA2/ANA2/C1IN2-/C2IN2-/ZCD/INT2 — PORTA bit 2 / analog input / comparator / ZCD input / external interrupt |
| Pin 4 | RA3/ANA3/C1IN3-/VREF+/CCP7/INT3 — PORTA bit 3 / analog input / VREF+ / CCP7 / external interrupt |
| Pin 5 | RA4/ANA4/ADACT/C1OUT — PORTA bit 4 / analog input / ADC trigger / comparator 1 output |
| Pin 6 | RA5/ANA5/C2OUT/DAC1OUT/DAC2OUT — PORTA bit 5 / analog input / comparator 2 output / DAC output |
| Pin 7 | RA6/ANA6/OSC1/CLKIN — PORTA bit 6 / analog input / oscillator crystal in / external clock in |
| Pin 8 | RA7/ANA7/OSC2/CLKOUT — PORTA bit 7 / analog input / oscillator crystal out / clock out |
| Pin 9 | VDD — Positive supply voltage (2.3V-5.5V) |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RB0/ANB0/C1IN4+/SDA1/RX1/DT1 — PORTB bit 0 / analog input / I2C1 SDA / EUSART1 RX |
| Pin 12 | RB1/ANB1/C1IN4-/SCL1/CK1 — PORTB bit 1 / analog input / I2C1 SCL / EUSART1 CK |
| Pin 13 | RB2/ANB2/C1IN3+/CANRX1 — PORTB bit 2 / analog input / CAN 1 RX |
| Pin 14 | RB3/ANB3/C1IN2+/CANTX1 — PORTB bit 3 / analog input / CAN 1 TX |
| Pin 15 | RB4/ANB4/SDI1/SDA2 — PORTB bit 4 / SPI1 SDI / I2C2 SDA |
| Pin 16 | RB5/ANB5/SDO1 — PORTB bit 5 / SPI1 SDO |
| Pin 17 | RB6/ANB6/SCK1/SCL2 — PORTB bit 6 / SPI1 SCK / I2C2 SCL |
| Pin 18 | RB7/ANB7/SS1/CCP4 — PORTB bit 7 / SPI1 SS / CCP4 |
| Pin 19 | VDDCORE — Internal core voltage decoupling (capacitor to VSS) |
| Pin 20 | VSS — Ground reference |
| Pin 21 | RC0/ANC0/SCL3 — PORTC bit 0 / analog input / I2C3 SCL |
| Pin 22 | RC1/ANC1/SDA3 — PORTC bit 1 / analog input / I2C3 SDA |
| Pin 23 | RC2/ANC2/CCP1/P1A — PORTC bit 2 / analog input / CCP1 / PWM 1A |
| Pin 24 | RC3/ANC3/CCP2/P2A — PORTC bit 3 / analog input / CCP2 / PWM 2A |
| Pin 25 | RC4/ANC4/CCP3/P3A — PORTC bit 4 / analog input / CCP3 / PWM 3A |
| Pin 26 | RC5/ANC5/CCP5/P3B — PORTC bit 5 / analog input / CCP5 / PWM 3B |
| Pin 27 | RC6/ANC6/CCP6/P4A/TX1/CK1 — PORTC bit 6 / analog input / CCP6 / PWM 4A / EUSART1 TX/CK |
| Pin 28 | RC7/ANC7/CCP7/P4B/RX1/DT1 — PORTC bit 7 / analog input / CCP7 / PWM 4B / EUSART1 RX/DT |
| Pin 29 | VSS — Ground reference |
| Pin 30 | VDD — Positive supply voltage |
| Pin 31 | RD0/AND0/T1G/PSMC1A — PORTD bit 0 / analog input / timer1 gate / power supply PWM 1A |
| Pin 32 | RD1/AND1/PSMC1B — PORTD bit 1 / analog input / power supply PWM 1B |
| Pin 33 | RD2/AND2/PSMC1C — PORTD bit 2 / analog input / power supply PWM 1C |
| Pin 34 | RD3/AND3/PSMC1D — PORTD bit 3 / analog input / power supply PWM 1D |
| Pin 35 | RD4/AND4/PSMC2A/SDO2 — PORTD bit 4 / analog input / PSMC2A / SPI2 SDO |
| Pin 36 | RD5/AND5/PSMC2B/SDI2 — PORTD bit 5 / analog input / PSMC2B / SPI2 SDI |
| Pin 37 | RD6/AND6/PSMC2C/SCK2 — PORTD bit 6 / analog input / PSMC2C / SPI2 SCK |
| Pin 38 | RD7/AND7/PSMC2D/SS2 — PORTD bit 7 / analog input / PSMC2D / SPI2 SS |
| Pin 39 | VSS — Ground reference |
| Pin 40 | VDD — Positive supply voltage |
| Pin 41 | RE0/ANE0/C1OUT/P2B — PORTE bit 0 / analog input / comparator 1 out / PWM 2B |
| Pin 42 | RE1/ANE1/C2OUT/P1B — PORTE bit 1 / analog input / comparator 2 out / PWM 1B |
| Pin 43 | RE2/ANE2/CCP2/AN22 — PORTE bit 2 / analog input / CCP2 / analog input 22 |
| Pin 44 | RE3/CCP3 — PORTE bit 3 / CCP3 |
| Pin 45 | RF0/ANF0 — PORTF bit 0 / analog input (LCD segment/auxiliary port) |
| Pin 46 | RF1/ANF1 — PORTF bit 1 / analog input (LCD segment/auxiliary port) |
| Pin 47 | RF2/ANF2 — PORTF bit 2 / analog input (LCD segment/auxiliary port) |
| Pin 48 | RF3/ANF3 — PORTF bit 3 / analog input (LCD segment/auxiliary port) |
| Pin 49 | RF4/ANF4 — PORTF bit 4 / analog input (LCD segment/auxiliary port) |
| Pin 50 | RF5/ANF5 — PORTF bit 5 / analog input (LCD segment/auxiliary port) |
| Pin 51 | RF6/ANF6 — PORTF bit 6 / analog input (LCD segment/auxiliary port) |
| Pin 52 | RF7/ANF7 — PORTF bit 7 / analog input (LCD segment/auxiliary port) |
| Pin 53 | RG0/ANG0 — PORTG bit 0 / analog input (LCD segment/auxiliary port) |
| Pin 54 | RG1/ANG1 — PORTG bit 1 / analog input (LCD segment/auxiliary port) |
| Pin 55 | RG2/ANG2 — PORTG bit 2 / analog input (LCD segment/auxiliary port) |
| Pin 56 | RG3/ANG3 — PORTG bit 3 / analog input (LCD segment/auxiliary port) |
| Pin 57 | RG4/ANG4 — PORTG bit 4 / analog input (LCD segment/auxiliary port) |
| Pin 58 | MCLR — Master Clear reset input (active low) |
| Pin 59 | RG6/ANG6/C1INA — PORTG bit 6 / analog input / comparator input |
| Pin 60 | RG7/ANG7/C2INA — PORTG bit 7 / analog input / comparator input |
| Pin 61 | VSS — Ground reference |
| Pin 62 | VDD — Positive supply voltage |
| Pin 63 | AVDD — Analog positive supply voltage |
| Pin 64 | AVSS — Analog ground reference |
Typical Applications
PIC18F65K40-I/MR is suitable for 6 applications: Low-Power Industrial Sensor Node, Capacitive-Touch HMI Front Panel, Small Motor Control (Fan, Pump, BLDC), USB-CDC/HID Human-Interface Device, 5V Industrial Control with EEPROM Logging, Always-On IoT Edge Controller.
Low-Power Industrial Sensor Node
The PIC18F65K40-I/MR's XLP nanoWatt technology delivers typical sleep currents below 100 nA while the 32 KB Flash and 2 KB SRAM comfortably host a sensor-stack driver plus a Modbus or wireless-protocol application layer. Running from a 3.3V LDO with a CR2032 backup, the device can sustain multi-year battery life in cold-chain temperature loggers or wireless vibration monitors. The 5V-tolerant analog channels interface directly to legacy 5V sensor front-ends without level shifters, while PPS (Peripheral Pin Select) lets the firmware team re-route SPI/I2C to any pin during layout review.
Recommended
Capacitive-Touch HMI Front Panel
The PIC18F65K40-I/MR integrates Microchip's mTouch hardware capacitive-touch sensing module, eliminating the need for an external touch controller in human-machine interface panels up to 64 buttons. The hardware CTMU (Charge Time Measurement Unit) provides sub-pF resolution sensing, and the CIP block handles proximity wake-up, allowing the MCU to enter XLP sleep and resume on touch in under 10 us. Combined with the 5V-tolerant I/O driving LED indicators and the 32 KB Flash storing UI firmware plus a 256-byte EEPROM for user preferences, this is a compact single-chip HMI solution for appliances and industrial control panels.
Recommended
Small Motor Control (Fan, Pump, BLDC)
The PIC18F65K40-I/MR's four CCP/ECCP modules deliver up to four independent PWM channels, suitable for sensored or sensorless BLDC/PMSM motor control in small appliances. The hardware CWG (Complementary Waveform Generator) produces complementary PWM with programmable dead-band, while the on-chip 10-bit ADCC with computation offloads zero-cross sensing for back-EMF control loops. With 64 MIPS throughput the device can run field-oriented control firmware at 20 kHz PWM rates while leaving headroom for serial communication, protecting designers from off-chip gate-driver dependencies in 12V-24V fan and pump applications.
Recommended
USB-CDC/HID Human-Interface Device
With a 64-MHz CPU clock and the on-chip USB 2.0 Full-Speed peripheral, the PIC18F65K40-I/MR can implement USB-CDC virtual COM ports or HID class devices without an external bridge chip. The 5V-tolerant I/O and the 32 KB Flash comfortably host a USB stack plus an HID report descriptor, while the 2 KB SRAM accommodates endpoint buffers and protocol state. Designers benefit from Microchip's free USB framework with HID/CDC class drivers, dramatically reducing firmware time-to-market for keyboards, HID gamepads, and configuration tools communicating over USB.
Recommended
5V Industrial Control with EEPROM Logging
The PIC18F65K40-I/MR runs directly from a 5V rail, allowing direct interfacing to legacy analog signals and 5V logic without external level shifters - a significant advantage in industrial PLC backplanes and HVAC controllers. The on-chip 256 B EEPROM supports parameter storage with up to 1 million erase/write cycles, suitable for non-volatile setpoints and runtime calibration data. The 64-pin count and PPS pin mapping enable dense pin allocation for SPI sensors, UART modems, and digital I/O, while XLP operation allows battery-backed RTC retention without external supervisor chips.
Recommended
Always-On IoT Edge Controller
For always-on IoT edge devices that wake on timer or sensor event, the PIC18F65K40-I/MR's nanoWatt XLP technology and the WWDT/CRC/Scan Core Independent Peripherals deliver autonomous operation with minimal CPU intervention. The device can poll sensors, drive outputs, and enter deep sleep without waking the core, while hardware fault detection (CRC over Flash, scan over RAM) increases functional safety in unattended deployments. The 5V-tolerant ADC channels and the 64-pin VQFN footprint give designers both board-space savings and direct 5V analog interfacing in mains-powered IoT gateways and smart-home hubs.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F65K40-I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F65K40T-I/MR | PIC18LF65K40-I/MR | PIC18F65K40-E/MR |
|---|---|---|---|---|
| Package | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB |
| Operating Voltage | 2.3V - 5.5V | 2.3V - 5.5V | 1.8V - 3.6V (LF variant) | 2.3V - 5.5V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) |
| Core Independent Peripherals (CIP) | CWG, WWDT, CRC/SCAN, ZCD, CTMU, mTouch | Same CIP set | Same CIP set | Same CIP set |
| Pin Count | 64 | 64 | 64 | 64 |
Key Differentiators
- Tape-and-reel packaging variant for high-volume assembly (vs PIC18F65K40T-I/MR)
- Low-voltage variant for 1.8V-3.6V operation (vs PIC18LF65K40-I/MR)
- Extended temperature grade for harsh environments (vs PIC18F65K40-E/MR)
Design Notes
The 64-VQFN (9x9 mm) package exposes a thermal pad on the underside that MUST be soldered to a continuous copper ground plane for both electrical and thermal performance. Without the EP soldered, the device dissipates heat poorly through only the side leads, and at high CPU activity (64 MIPS) the junction temperature can rise 30-40C above ambient. For 5V industrial control where the device dissipates appreciable I/O power, ensure at least 1 sq inch of unbroken ground copper beneath the EP.
Place the VDDCORE decoupling capacitor (0.1uF ceramic, X7R, 6.3V or higher) as close as possible to the VDDCORE pin (pin 19), with the trace length kept under 5 mm. Use a wide, short ground return path directly to the VSS pin (pin 20). Place AVDD and AVSS analog supply pins with their own 10uF + 0.1uF capacitor stack, separated from digital VDD noise by a ferrite bead if analog accuracy is critical.
Several common pitfalls: (1) Floating unused I/O pins must be configured as outputs or inputs with the WPU disabled to avoid leakage; (2) MCLR should be pulled up to VDD through a 10 kohm resistor unless configured as a regular I/O; (3) PPS remapping of peripherals must be UNLOCKED before configuration - the IOLOCK bit must be cleared by the unlock sequence; (4) Always consult the device errata for ADCC and PPS revisions before locking the PCB layout for production.
For USB applications using the on-chip USB peripheral, the D+/D- lines require 90 ohm differential impedance and a 1.5 kohm pull-up to indicate Full-Speed connection; place ferrite beads on VDD near the USB connector to suppress bus-powered noise. For CAN bus lines, use the MCP2515 external CAN controller or a dedicated CAN PIC18F variant; the PIC18F65K40 lacks an integrated CAN peripheral in the standard configuration.
Compliance Information
RoHS compliant per Microchip product page. Industrial (-I) temperature grade; AEC-Q100 not qualified - choose PIC18F65K40-E/MR for harsh environment variants.
