PIC18F66K80-I/MR - 8-bit 64MHz 64KB Flash MCU w/ ECAN | Microchip
MPN: PIC18F66K80-I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.47 | $6.47 |
| 10 | $5.83 | $58.30 |
| 100 | $5.18 | $518.00 |
| 500 | $4.66 | $2,330.00 |
| 1,000 | $4.14 | $4,140.00 |
PIC18F66K80-I/MR Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, peripherals, and I/O. The PIC18 family uses a RISC-based 8-bit core with hardware multiplier, 16-bit instructions, and a Harvard bus that separates program and data paths. The PIC18F66K80 sits in Microchip's "K" mid-range tier, balancing high-performance peripherals (ECAN, 12-bit ADC, CTMU) with the XLP power-saving feature set.
Key features include integrated ECAN 2.0B for industrial and automotive networking, a 12-bit A/D converter with up to 16 channels, mTouch capacitive-touch via CTMU, 64 KB self-programming Flash, 1 KB EEPROM, four 8-bit timers plus multiple 16-bit timers, two MSSP (SPI/I2C) ports, and two enhanced USART modules. nanoWatt XLP modes include deep sleep with RTC and WDT operation typically under 1 uA.
Typical applications include automotive body and cluster networks (ECAN nodes), building-control and HVAC equipment, elevator control panels, industrial sensor hubs, and low-power remote sensor modules. The wide 1.8-5.5 V range and low sleep current make it well suited to battery-backed or energy-harvesting designs.
When designing with this part, ensure decoupling is placed near each power pin, leave the no-connect (NC) pins per the pinout, and configure the CONFIG words for oscillator, watchdog, and code protection. Use MPLAB X IDE with the XC8 compiler for code development and debugging.
Drop-in alternatives for PIC18F66K80-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 PIC18F66K80-I/MR (same form factor and footprint) — differing in ADC, Package, Operating Temperature Range, Communication Interfaces, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F66K80-H/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.94 / Unit
View Datasheet →PIC18F66K80-E/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F65K90-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.02 / Unit
View Datasheet →PIC18F65K80-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.62 / Unit
View Datasheet →PIC18F66K40T-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.46 / Unit
View Datasheet →PIC18F66K80-I/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit RISC |
| CPU Speed | 64 MHz (16 MIPS) |
| Program Memory | 64 KB Flash |
| RAM | 4 KB |
| EEPROM | 1 KB |
| Operating Voltage | 1.8 V to 5.5 V |
| ADC | 12-bit, up to 16 channels |
| Communication | ECAN 2.0B, 2x EUSART, 2x MSSP (SPI/I2C) |
| Timers | 4x 8-bit, 4x 16-bit |
| CTMU | Yes (mTouch capacitive touch) |
| XLP nanoWatt | Yes (deep sleep < 1 uA typical) |
| Package | 64-pin VQFN (9x9 mm) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| RoHS | Compliant |
PIC18F66K80-I/MR Pin Configuration
| Pin 1 | NC — Not connected (per datasheet) |
| Pin 2 | RA0 — PORTA digital I/O / AN0 analog input |
| Pin 3 | RA1 — PORTA digital I/O / AN1 analog input |
| Pin 4 | RA2 — PORTA digital I/O / AN2 analog input |
| Pin 5 | RA3 — PORTA digital I/O / AN3 analog input / VREF+ |
| Pin 6 | RA4 — PORTA digital I/O / AN4 analog input |
| Pin 7 | RA5 — PORTA digital I/O / AN5 / VREF- |
| Pin 8 | RA6 — PORTA digital I/O / OSC2 |
| Pin 9 | RA7 — PORTA digital I/O / OSC1 |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive power supply |
| Pin 12 | RB0 — PORTB digital I/O / INT0 / ECCP1 |
| Pin 13 | RB1 — PORTB digital I/O / INT1 |
| Pin 14 | RB2 — PORTB digital I/O / INT2 / CTED1 |
| Pin 15 | RB3 — PORTB digital I/O / INT3 / CTED2 |
| Pin 16 | RB4 — PORTB digital I/O / KBI0 |
| Pin 17 | RB5 — PORTB digital I/O / KBI1 / CANTX |
| Pin 18 | RB6 — PORTB digital I/O / KBI2 / PGC (ICSP clock) |
| Pin 19 | RB7 — PORTB digital I/O / KBI3 / PGD (ICSP data) |
| Pin 20 | VSS — Ground reference |
| Pin 21 | VDD — Positive power supply |
| Pin 22 | RC0 — PORTC digital I/O / SOSCO / T1OSO |
| Pin 23 | RC1 — PORTC digital I/O / SOSCI / T1OSI |
| Pin 24 | RC2 — PORTC digital I/O / CCP1 |
| Pin 25 | RC3 — PORTC digital I/O / SCL1 |
| Pin 26 | RC4 — PORTC digital I/O / SDA1 |
| Pin 27 | RC5 — PORTC digital I/O / SDO1 |
| Pin 28 | RC6 — PORTC digital I/O / TX1/CK1 |
| Pin 29 | RC7 — PORTC digital I/O / RX1/DT1 |
| Pin 30 | VSS — Ground reference |
| Pin 31 | VDD — Positive power supply |
| Pin 32 | RD0 — PORTD digital I/O / ECI |
| Pin 33 | RD1 — PORTD digital I/O / CCP4 |
| Pin 34 | RD2 — PORTD digital I/O / CCP5 |
| Pin 35 | RD3 — PORTD digital I/O / CTMUI |
| Pin 36 | RD4 — PORTD digital I/O / CANRX |
| Pin 37 | RD5 — PORTD digital I/O |
| Pin 38 | RD6 — PORTD digital I/O |
| Pin 39 | RD7 — PORTD digital I/O |
| Pin 40 | VSS — Ground reference |
| Pin 41 | VDD — Positive power supply |
| Pin 42 | RE0 — PORTE digital I/O / AN8 |
| Pin 43 | RE1 — PORTE digital I/O / AN9 |
| Pin 44 | RE2 — PORTE digital I/O / AN10 |
| Pin 45 | RE3 — PORTE digital I/O / AN11 |
| Pin 46 | RF0 — PORTF digital I/O / AN5 alt |
| Pin 47 | RF1 — PORTF digital I/O / AN6 / C2OUT |
| Pin 48 | RF2 — PORTF digital I/O / AN7 / C1OUT |
| Pin 49 | RF3 — PORTF digital I/O / AN8 alt |
| Pin 50 | RF4 — PORTF digital I/O / AN9 alt |
| Pin 51 | RF5 — PORTF digital I/O / AN10 alt |
| Pin 52 | RF6 — PORTF digital I/O / AN11 alt |
| Pin 53 | RF7 — PORTF digital I/O / AN12 |
| Pin 54 | VSS — Ground reference |
| Pin 55 | VDD — Positive power supply |
| Pin 56 | RG0 — PORTG digital I/O / CCP3 |
| Pin 57 | RG1 — PORTG digital I/O / CANTX2 |
| Pin 58 | RG2 — PORTG digital I/O / CANRX2 |
| Pin 59 | RG3 — PORTG digital I/O / CCP4 alt |
| Pin 60 | RG4 — PORTG digital I/O / CCP5 alt |
| Pin 61 | AVDD — Analog positive supply |
| Pin 62 | AVSS — Analog ground reference |
| Pin 63 | MCLR — Master Clear reset input (active low) |
| Pin 64 | NC — Not connected (per datasheet) |
Typical Applications
PIC18F66K80-I/MR is suitable for 6 applications: Automotive ECAN Body Control Module, Building Control and HVAC Equipment, Industrial Sensor Hub with CANopen, Elevator Control Panel, Battery-Backed Data Logger, Capacitive Touch User Interface.
Automotive ECAN Body Control Module
The PIC18F66K80-I/MR's integrated ECAN 2.0B module and 64 KB Flash make it a strong fit for automotive body control nodes. The hardware CAN engine offloads bit timing, acceptance filtering, and bus arbitration from the CPU, freeing cycles for body-domain logic such as lighting, door modules, and seat control. The 1.8-5.5 V supply range handles crank-voltage transients when paired with external TVS protection, and the XLP sleep mode keeps quiescent draw below 100 uA in parked-vehicle modes for weeks-long standby. ECAN bit rates up to 1 Mbps support modern vehicle networks including CAN-FD gateways.
Recommended
Building Control and HVAC Equipment
HVAC and building-automation controllers benefit from the PIC18F66K80-I/MR's combination of 12-bit ADC for analog sensor reading, CTMU for capacitive user interfaces, and 16 MIPS performance for control loops. The wide operating voltage lets the part run directly from 24 VAC rectified supplies with simple regulators. The dual MSSP (SPI/I2C) and dual EUSART ports support daisy-chained sensor buses, BACnet gateways, and Modbus RTU connections. XLP deep-sleep mode below 1 uA enables battery-backed thermostats that survive outages while still polling schedules and maintaining RTC accuracy.
Recommended
Industrial Sensor Hub with CANopen
Industrial sensor hubs require deterministic communication, robust peripherals, and extended temperature operation - all delivered by the PIC18F66K80-I/MR. The integrated ECAN module supports CANopen and DeviceNet stacks, while the 12-bit ADC and CTMU allow direct connection to analog sensors and capacitive proximity elements. The 64 KB Flash provides ample headroom for CANopen stack libraries plus custom application code. The -40 C to +85 C industrial temperature grade suits factory-floor deployments without derating.
Recommended
Elevator Control Panel
Elevator control panels require reliable operation across many switching cycles, multi-language display support, and clean button-debounce logic. The PIC18F66K80-I/MR provides 64 KB Flash for state machines and menu handling, 4 KB RAM for display buffers, and CTMU for capacitive floor-selection buttons without mechanical wear. The hardware ECAN allows the panel to network with the elevator controller for floor-status synchronization. The 16 MIPS throughput ensures responsive button-press handling and display refresh even with simultaneous CAN traffic.
Recommended
Battery-Backed Data Logger
Battery-powered data loggers running from 2x AA cells or Li-ion packs require microamp-range quiescent current and reliable non-volatile storage. The PIC18F66K80-I/MR's nanoWatt XLP deep-sleep mode drops below 1 uA with RTC active, and its 1 KB EEPROM allows parameter storage without external memory. The 12-bit ADC samples slow analog signals (temperature, pressure, flow) without an external front end. The 64 KB Flash accommodates months of circular log buffering, and the wide 1.8-5.5 V range supports battery chemistries from alkaline to Li-primary.
Recommended
Capacitive Touch User Interface
The PIC18F66K80-I/MR's CTMU (Charge Time Measurement Unit) provides hardware-driven capacitive touch sensing for buttons, sliders, and wheels without an external touch controller IC. Combined with the 12-bit ADC for proximity detection and 64 KB Flash for gesture-recognition firmware, the part enables compact sealed-keypad designs that survive water and dust ingress. The XLP sleep mode keeps battery-powered touch remotes in standby for months between charges, waking only on proximity interrupt.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F66K80-I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F66K80-H/MR | PIC18F66K80-E/MR | PIC18F65K90-I/MR | PIC18F65K80-I/PT | PIC18F66K40T-I/MR |
|---|---|---|---|---|---|---|
| Package | 64-VQFN (9x9 mm) | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | TQFP-64 - same pin count different package | 64-VQFN (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 64 KB | 32 KB (-50%) | 32 KB (-50%) | 32 KB (-50%) |
| ECAN Module | Yes (ECAN 2.0B) | Yes | Yes | No | Yes | No |
| Operating Frequency | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Temperature Grade | Industrial -40 C to +85 C | High -40 C to +150 C | Extended -40 C to +125 C | Industrial -40 C to +85 C | Industrial -40 C to +85 C | Industrial -40 C to +85 C |
| CTMU Touch Sensing | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Integrated ECAN 2.0B with hardware filtering (vs PIC18F66K40T-I/MR)
- 64 KB Flash vs 32 KB in similar K-series parts (vs PIC18F65K80-I/PT)
- Same package across K-series K80 family (vs PIC18F66K80-E/MR)
Design Notes
Place a 100 nF decoupling capacitor within 5 mm of each VDD/VDDCORE pin and a bulk 4.7-10 uF tantalum or ceramic capacitor near the package. The PIC18F66K80-I/MR has multiple VDD/VSS pin pairs (pins 11/10, 21/20, 31/30, 41/40, 55/54); all must be bypassed. AVDD/AVSS (pins 61/62) require separate decoupling with an LC or ferrite-bead-isolated analog supply for best ADC performance.
Route the ECAN CANH/CANL differential pair as impedance-matched (~120 ohm) traces with ground reference plane on the layer below, keeping pair length mismatch under 5 mm. Place the MCP2551 or similar CAN transceiver within 50 mm of the PIC18F66K80-I/MR's CANRX/CANTX pins (RB5/RD4). Keep crystal traces short and surrounded by ground pour to minimize EMI coupling into the high-impedance ADC inputs.
Do not leave MCLR floating - it must be pulled up to VDD through a 10-47 kohm resistor, optionally with a 100 nF capacitor for noise filtering. Configure CONFIG1L, CONFIG1H, CONFIG2L, CONFIG2H, CONFIG3L, CONFIG3H, CONFIG4L, CONFIG4H, CONFIG5L, CONFIG5H, CONFIG6L, CONFIG6H, CONFIG7L, and CONFIG7H in MPLAB X IDE to match the oscillator, watchdog, brown-out, and code-protection requirements for your design. Failure to lock CONFIG bits properly is the most common firmware brick.
The 9x9 mm VQFN package has a thermal pad (EPAD) on its underside that must be soldered to a copper pour with multiple thermal vias to the ground plane(s) to dissipate the ~500 mW max power dissipation. Estimated: at 64 MHz / 5 V / full peripheral activity, core current can reach 25 mA; without proper PCB thermal management, junction-to-ambient thermal resistance (theta_JA) can exceed 30 C/W, causing thermal throttling in high-ambient environments.
Compliance Information
PIC18F66K80-I/MR is the industrial temperature grade and is not AEC-Q100 qualified; choose PIC18F66K80-E/MR for AEC-Q100 automotive. RoHS and REACH compliance per Microchip product declaration. Conflict-minerals statement per Microchip CMRT filings.
