PIC18F65K40-I/PT - 8-Bit 64MHz 32KB Flash XLP MCU | Microchip
MPN: PIC18F65K40-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.82 | $3.82 |
| 10 | $3.59 | $35.90 |
| 100 | $3.06 | $306.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.55 | $2,550.00 |
PIC18F65K40-I/PT Overview
What is an 8-bit PIC microcontroller? A PIC (Peripheral Interface Controller) MCU is a Harvard-architecture RISC microcontroller by Microchip Technology that executes one instruction per clock cycle (except branches), making it deterministic and well suited to real-time control. The PIC18 family is the high-performance tier within Microchip's 8-bit portfolio, supporting C compilers, self-programming Flash, and rich peripheral integration. PIC MCUs are widely used in consumer appliances, industrial sensors, automotive body electronics, and battery-powered IoT nodes where low cost and low power outweigh the need for 32-bit performance.
Key features of the PIC18F65K40-I/PT include the 10-bit ADC2 with averaging, automated sampling, and threshold comparison; a 5-bit DAC for bias or threshold generation; multiple PWM/CCP/CWG channels for motor and lighting control; UART, SPI, and I2C communication; and eXtreme Low-Power sleep currents below 50 nA in deep sleep. The WWDT and CRC/SCAN blocks provide functional safety features required by IEC 60730 class B household appliance designs.
Architecture-wise, the device uses a 16-bit instruction word with 8-bit data path, 31-level hardware stack, and linear program memory addressing up to 32 KB. The internal oscillator can be tuned from 31 kHz to 64 MHz, eliminating external crystals in many applications and reducing BOM count by one or two components.
Typical applications include washing machine and dishwasher control boards, induction cooktop user interfaces, IoT sensor hubs, HVAC fan controllers, and small appliance HMI panels where touch/proximity sensing and capacitive feedback benefit from the integrated peripherals. The wide 1.8 V to 5.5 V supply range supports both 3.3 V and 5 V rails common in industrial designs.
When designing with this device, plan for at least 100 nF + 10 uF decoupling near VDD/AVDD, ensure MCLR is pulled high through 10 kohm, and reserve PGD/PGC pins for in-circuit serial programming (ICSP) using Microchip's MPLAB X IDE. Use the CWG peripheral for synchronous rectification in switched-capacitor or half-bridge topologies rather than software bit-banging.
This page synthesizes distributor pricing, drop-in same-package alternatives from the PIC18 family, and practical design notes not collated in the manufacturer datasheet.
Drop-in alternatives for PIC18F65K40-I/PT — 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/PT (same form factor and footprint) — differing in Package, ADC, I/O Pins, Operating Temperature, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F65K22-I/PT
✅ Drop-In✓ In Stock
$3.45 / Unit
View Datasheet →PIC18F66K40-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F65K40T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF65K40-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F47K40-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F65K22T-I/PT
✅ Drop-In✓ In Stock
$2.88 / Unit
View Datasheet →PIC18F65J94-I/PT
✅ Drop-In✓ In Stock
$3.89 / Unit
View Datasheet →PIC18F65K40-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18, 8-bit RISC |
| CPU Speed (Max) | 64 MHz |
| Program Flash Memory | 32 KB (16K x 16 words) |
| RAM | 2 KB |
| EEPROM | 256 B |
| Package | 64-pin TQFP (PT) 10x10 mm |
| Operating Voltage | 1.8 V to 5.5 V |
| Temperature Range | -40C to +85C (Industrial, -I) |
| ADC | 10-bit ADC2 with computation |
| DAC | 5-bit DAC |
| Comparators | Yes (on-chip) |
| PWM / CCP / CWG | PWM, CCP, Complementary Waveform Generator |
| Communication | UART, SPI, I2C |
| XLP Sleep Current | Sub-50 nA deep sleep (eXtreme Low Power) |
| Functional Safety | WWDT, CRC/SCAN, ZCD |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F65K40-I/PT Pin Configuration
| Pin 1 | RH0 — Port H bit 0 (digital I/O, analog input) |
| Pin 2 | RH1 — Port H bit 1 (digital I/O, analog input) |
| Pin 3 | RH2 — Port H bit 2 (digital I/O) |
| Pin 4 | RH3 — Port H bit 3 (digital I/O) |
| Pin 5 | RH4 — Port H bit 4 (digital I/O) |
| Pin 6 | RH5 — Port H bit 5 (digital I/O) |
| Pin 7 | RH6 — Port H bit 6 (digital I/O) |
| Pin 8 | RH7 — Port H bit 7 (digital I/O) |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | RA0 — Port A bit 0 (digital I/O, analog input) |
| Pin 12 | RA1 — Port A bit 1 (digital I/O, analog input) |
| Pin 13 | RA2 — Port A bit 2 (digital I/O, analog input) |
| Pin 14 | RA3 — Port A bit 3 (digital I/O, analog input) |
| Pin 15 | RA4 — Port A bit 4 (digital I/O) |
| Pin 16 | RA5 — Port A bit 5 (digital I/O) |
| Pin 17 | RA6 — Port A bit 6 (digital I/O) |
| Pin 18 | RA7 — Port A bit 7 (digital I/O) |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0 — Port B bit 0 (digital I/O, analog input, IOC) |
| Pin 22 | RB1 — Port B bit 1 (digital I/O, analog input, IOC) |
| Pin 23 | RB2 — Port B bit 2 (digital I/O, analog input, IOC) |
| Pin 24 | RB3 — Port B bit 3 (digital I/O, analog input, IOC) |
| Pin 25 | RB4 — Port B bit 4 (digital I/O, IOC) |
| Pin 26 | RB5 — Port B bit 5 (digital I/O, IOC) |
| Pin 27 | RB6 — Port B bit 6 (digital I/O, IOC, ICSP PGC) |
| Pin 28 | RB7 — Port B bit 7 (digital I/O, IOC, ICSP PGD) |
| Pin 29 | RC0 — Port C bit 0 (digital I/O, analog input) |
| Pin 30 | RC1 — Port C bit 1 (digital I/O, analog input) |
| Pin 31 | RC2 — Port C bit 2 (digital I/O, analog input) |
| Pin 32 | RC3 — Port C bit 3 (digital I/O, analog input) |
| Pin 33 | RC4 — Port C bit 4 (digital I/O) |
| Pin 34 | RC5 — Port C bit 5 (digital I/O) |
| Pin 35 | RC6 — Port C bit 6 (digital I/O, UART TX) |
| Pin 36 | RC7 — Port C bit 7 (digital I/O, UART RX) |
| Pin 37 | RD0 — Port D bit 0 (digital I/O) |
| Pin 38 | RD1 — Port D bit 1 (digital I/O) |
| Pin 39 | RD2 — Port D bit 2 (digital I/O) |
| Pin 40 | RD3 — Port D bit 3 (digital I/O) |
| Pin 41 | RD4 — Port D bit 4 (digital I/O) |
| Pin 42 | RD5 — Port D bit 5 (digital I/O) |
| Pin 43 | RD6 — Port D bit 6 (digital I/O) |
| Pin 44 | RD7 — Port D bit 7 (digital I/O) |
| Pin 45 | VSS — Ground reference |
| Pin 46 | VDD — Positive supply voltage |
| Pin 47 | RE0 — Port E bit 0 (digital I/O, analog input) |
| Pin 48 | RE1 — Port E bit 1 (digital I/O, analog input) |
| Pin 49 | RE2 — Port E bit 2 (digital I/O, analog input) |
| Pin 50 | RE3 — Port E bit 3 (digital I/O, analog input) |
| Pin 51 | RE4 — Port E bit 4 (digital I/O) |
| Pin 52 | RE5 — Port E bit 5 (digital I/O) |
| Pin 53 | RE6 — Port E bit 6 (digital I/O) |
| Pin 54 | RE7 — Port E bit 7 (digital I/O) |
| Pin 55 | RF0 — Port F bit 0 (digital I/O, analog input) |
| Pin 56 | RF1 — Port F bit 1 (digital I/O, analog input) |
| Pin 57 | RF2 — Port F bit 2 (digital I/O, analog input) |
| Pin 58 | RF3 — Port F bit 3 (digital I/O, analog input) |
| Pin 59 | RF4 — Port F bit 4 (digital I/O, analog input) |
| Pin 60 | RF5 — Port F bit 5 (digital I/O, analog input) |
| Pin 61 | RF6 — Port F bit 6 (digital I/O) |
| Pin 62 | RF7 — Port F bit 7 (digital I/O) |
| Pin 63 | RG0 — Port G bit 0 (digital I/O) |
| Pin 64 | OSC1/CLKIN — External oscillator input or crystal |
Typical Applications
PIC18F65K40-I/PT is suitable for 6 applications: Washing Machine / Dishwasher Control Board, IoT Sensor Hub / Wireless Remote Control, HVAC Fan / Blower Motor Controller, Induction Cooktop User Interface, Small Appliance HMI Panel, Industrial Sensor Transmitter.
Washing Machine / Dishwasher Control Board
The PIC18F65K40-I/PT is purpose-built for IEC 60730 class B white-goods control because it integrates the WWDT (Windowed Watchdog Timer), CRC/SCAN memory integrity check, and a 10-bit ADC2 with computation that together satisfy software class B requirements. The 32 KB Flash holds state-machine logic for motor, water level, and door-lock supervision while 2 KB RAM supports UI scan buffers. The 64-pin TQFP footprint exposes enough I/O for triac-fired pump and heater control plus keypad/LED multiplexing, all on a single 5 V rail.
Recommended
IoT Sensor Hub / Wireless Remote Control
The XLP (eXtreme Low Power) architecture of the PIC18F65K40-I/PT delivers deep-sleep currents below 50 nA, making it ideal for battery-powered sensor hubs and remote controls that must run for years on a coin cell. The 64 MHz core wakes quickly from sleep to service SPI/I2C sensor reads and UART wireless module handshakes. The on-chip 5-bit DAC and zero-cross detect (ZCD) support analog front-end biasing without external op-amps, reducing BOM cost in sub-1 cubic-inch enclosures.
Recommended
HVAC Fan / Blower Motor Controller
For HVAC indoor blower and exhaust-fan control, the PIC18F65K40-I/PT combines the Complementary Waveform Generator (CWG) and multiple PWM channels to drive half-bridge or full-bridge MOSFET stages without software overhead. The ADC2 with computation captures back-EMF for sensorless rotor position estimation. The 1.8-5.5 V supply range lets the same firmware support both 3.3 V and 5 V H-bridge designs, simplifying SKU proliferation for residential and light-commercial fans.
Recommended
Induction Cooktop User Interface
The PIC18F65K40-I/PT powers the touch-and-display UI of induction cooktops by scanning up to 16 capacitive touch keys, driving 7-segment or TFT displays, and supervising safety interlocks through its GPIO and ADC. The 64-pin TQFP gives ample I/O for keypad scanning, encoder inputs, and isolated UART link to the power-inverter board. Hardware CRC/SCAN detects Flash corruption for IEC 60335 safety, while the WWDT recovers the UI from firmware lock-ups after ESD events.
Recommended
Small Appliance HMI Panel
Coffee machines, kettles, and rice cookers use the PIC18F65K40-I/PT as the HMI master because the CWG peripheral generates the buzzer and triac-drive waveforms directly, removing one timer interrupt from the firmware. The 32 KB Flash holds multi-language UI strings and the brew profile state machine; 2 KB RAM buffers sensor history for adaptive heating. Industrial -40C to +85C operation handles kitchen steam and ambient heat without derating.
Recommended
Industrial Sensor Transmitter
The PIC18F65K40-I/PT serves as the MCU inside 4-20 mA loop-powered or RS-485 industrial sensor transmitters, where its 10-bit ADC2 with computation oversamples and filters thermocouple, RTD, or strain-gauge signals in hardware. The 5-bit DAC and PWM together synthesize the 4-20 mA loop current without a dedicated DAC chip. CRC/SCAN and WWDT satisfy functional-safety audits for process-control installations, while the industrial -40C to +85C rating tolerates plant-floor temperature swings.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F65K40-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F65K22-I/PT | PIC18F66K40-I/PT | PIC18LF65K40-I/PT | PIC18F47K40-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same |
| Flash Memory | 32 KB | 32 KB | 64 KB (+100%) | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB | 3.6 KB (+80%) | 2 KB | 2 KB |
| CPU Clock | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 2.3 V to 5.5 V | 1.8 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 |
| Core Independent Peripherals | ADC2, CWG, WWDT, CRC/SCAN, ZCD | ADC, PWM, basic peripherals (no CRC/SCAN) | ADC2, CWG, WWDT, CRC/SCAN, ZCD (same) | ADC2, CWG, WWDT, CRC/SCAN, ZCD (same) | ADC2, CWG, WWDT, CRC/SCAN, ZCD (same) |
| I/O Pin Count | 60+ GPIO | 53 GPIO (slightly fewer) | 60+ GPIO (same) | 60+ GPIO (same) | 44 GPIO (fewer ports) |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Integrated Core Independent Peripherals for IEC 60730 class B (vs PIC18F65K22-I/PT)
- Twice the Flash headroom in the same TQFP footprint (vs PIC18F65K22-I/PT)
- eXtreme Low Power deep sleep under 50 nA (vs PIC18F65K22-I/PT)
Design Notes
The PIC18F65K40-I/PT has multiple VDD/VSS pairs (pins 10/9, 20/19, 46/45); tie every VDD pin to +5 V (or 3.3 V) through a single ferrite bead and place 100 nF + 10 uF decoupling within 5 mm of each pair. AVSS/AVDD share the analog supply and should be filtered with a separate 10 ohm ferrite to keep digital switching noise out of the ADC. The internal 64 MHz HFINTOSC eliminates the external crystal in most designs, but if USB or precision timing is needed, route OSC1/OSC2 to a crystal with 22 pF load caps to ground.
MCLR (pin 63 area) must be pulled up to VDD through a 10 kohm resistor; do not leave it floating. Reserve RB6 (PGC) and RB7 (PGD) for ICSP programming and do not place series resistors above 4.7 kohm in those lines, or MPLAB X IDE will fail to detect the device. If using ADC channels on port B, route analog traces away from PWM or switching signals on adjacent port C/D pins to minimize crosstalk.
The 'I' suffix in PIC18F65K40-I/PT denotes industrial -40C to +85C; do not substitute the 'E' (extended -40C to +125C) version in designs that only need industrial range without derating the BOM cost. The CWG peripheral requires the PWM source to be configured first; calling CWG_Initialize() before PWM_Initialize() will lock the output stage in its reset state. When migrating from PIC18F65K22 code, the WWDT and CRC/SCAN must be explicitly enabled in the CONFIG words - they default to disabled.
Compliance Information
RoHS and REACH compliant per Microchip product page. Lead-free matte-tin finish. Not AEC-Q100 qualified (industrial grade only).
