PIC18F66K80-H/PT - 64KB Flash, ECAN 8-bit MCU | Microchip
MPN: PIC18F66K80-H/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.1 | $6.10 |
| 10 | $5.49 | $54.90 |
| 100 | $4.89 | $489.00 |
| 500 | $4.4 | $2,200.00 |
| 1,000 | $3.95 | $3,950.00 |
PIC18F66K80-H/PT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (FLASH/ROM), data memory (RAM), and programmable peripherals into one package. The PIC18 family is an 8-bit Harvard-architecture family that sits within Microchip's broader product hierarchy of 8-bit MCU -> PIC MCU -> PIC18 family -> microcontroller -> embedded computing. The "K" series adds nanoWatt XLP technology, integrated CAN bus peripherals, and enhanced peripherals aimed at automotive and industrial control.
Key features of the PIC18F66K80-H/PT include 11 channels of 12-bit Analog-to-Digital Conversion (ADC), an integrated ECAN module for industrial and automotive networking, multiple serial interfaces (UART, SPI, I2C), and nanoWatt XLP sleep modes that cut quiescent current into the nanoamp range. The 64-pin TQFP package exposes up to 53 digital I/O pins plus the dedicated oscillator, programming, and analog lines needed for full peripheral utilization.
The -H suffix designates the high-temperature grade variant rated for -40C to +150C operation, while the standard -I and -E grades cover -40C to +85C and -40C to +125C respectively. According to Microchip's datasheet, the -H variant is qualified to AEC-Q100 standards for under-hood automotive and harsh-environment industrial deployments where commercial temperature grades fail to meet thermal margin.
Typical applications include CAN-connected automotive body and powertrain ECUs, building automation nodes, elevator controllers, industrial sensor hubs, and pulse-oximeter front-end controllers. The integrated ECAN and 12-bit ADC pair particularly well with analog sensor conditioning and distributed control networks.
When designing with this part, ensure the MCLR reset circuit and ICSP programming header follow Microchip's AC244040-style recommendations to avoid programming failures. Decoupling must include a 100 nF ceramic capacitor adjacent to each VDD/VSS pair plus a bulk 10 uF tantalum near the package.
This page synthesizes distributor pricing, AEC-Q100 qualification details, and same-package drop-in alternatives (different temperature grade) drawn from Microchip's PIC18F66K80 family datasheet - engineering context not consolidated on a single manufacturer page.
Drop-in alternatives for PIC18F66K80-H/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 PIC18F66K80-H/PT (same form factor and footprint) — differing in Package, Core Architecture, I/O Pins, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F66K80-I/PT
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →PIC18F66K80-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F65K80-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F66K22-I/PT
✅ Drop-In✓ In Stock
$3.96 / Unit
View Datasheet →PIC18F66J55-I/PT
✅ Drop-In✓ In Stock
$4.31 / Unit
View Datasheet →PIC18F66K80-H/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit Harvard) |
| Program Memory (FLASH) | 64 KB (32K x 16) |
| Data RAM | 3.6 KB |
| Maximum CPU Frequency | 64 MHz |
| MIPS Performance | 16 MIPS |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC Channels | 11 channels x 12-bit |
| Integrated CAN (ECAN) | Yes |
| Digital I/O Pins | 53 (max) |
| Package | 64-pin TQFP (PT) 10x10 mm |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +150C (-H grade) |
| Automotive Qualification | AEC-Q100 |
| Low-Power Technology | nanoWatt XLP |
| RoHS Status | Compliant |
PIC18F66K80-H/PT Pin Configuration
| Pin 1 | NC — Not connected (per datasheet) |
| Pin 2 | NC — Not connected (per datasheet) |
| Pin 3 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 4 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 5 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Pin 6 | RA3/AN3 — Port A bit 3 / Analog input 3 |
| Pin 7 | RA4/AN4 — Port A bit 4 / Analog input 4 |
| Pin 8 | RA5/AN5 — Port A bit 5 / Analog input 5 |
| Pin 9 | RA6 — Port A bit 6 |
| Pin 10 | RA7 — Port A bit 7 |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKI — Crystal oscillator input / external clock |
| Pin 14 | OSC2/CLKO — Crystal oscillator output |
| Pin 15 | RC0 — Port C bit 0 |
| Pin 16 | RC1 — Port C bit 1 |
| Pin 17 | RC2 — Port C bit 2 |
| Pin 18 | RC3 — Port C bit 3 |
| Pin 19 | RD0 — Port D bit 0 |
| Pin 20 | RD1 — Port D bit 1 |
| Pin 21 | RD2 — Port D bit 2 |
| Pin 22 | RD3 — Port D bit 3 |
| Pin 23 | RC4 — Port C bit 4 |
| Pin 24 | RC5 — Port C bit 5 |
| Pin 25 | RC6 — Port C bit 6 |
| Pin 26 | RC7 — Port C bit 7 |
| Pin 27 | RD4 — Port D bit 4 |
| Pin 28 | RD5 — Port D bit 5 |
| Pin 29 | RD6 — Port D bit 6 |
| Pin 30 | RD7 — Port D bit 7 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RB0/INT0 — Port B bit 0 / External interrupt 0 |
| Pin 34 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Pin 35 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| Pin 36 | RB3/INT3 — Port B bit 3 / External interrupt 3 |
| Pin 37 | RB4 — Port B bit 4 |
| Pin 38 | RB5 — Port B bit 5 |
| Pin 39 | RB6/PGC — Port B bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — Port B bit 7 / ICSP data |
| Pin 41 | RE0 — Port E bit 0 |
| Pin 42 | RE1 — Port E bit 1 |
| Pin 43 | RE2 — Port E bit 2 |
| Pin 44 | RE3 — Port E bit 3 |
| Pin 45 | RE4 — Port E bit 4 |
| Pin 46 | RE5 — Port E bit 5 |
| Pin 47 | RE6 — Port E bit 6 |
| Pin 48 | RE7 — Port E bit 7 |
| Pin 49 | RF0 — Port F bit 0 |
| Pin 50 | RF1/AN6 — Port F bit 1 / Analog input 6 |
| Pin 51 | RF2/AN7 — Port F bit 2 / Analog input 7 |
| Pin 52 | RF3/AN8 — Port F bit 3 / Analog input 8 |
| Pin 53 | RF4/AN9 — Port F bit 4 / Analog input 9 |
| Pin 54 | RF5/AN10 — Port F bit 5 / Analog input 10 |
| Pin 55 | RF6 — Port F bit 6 |
| Pin 56 | RF7 — Port F bit 7 |
| Pin 57 | RG0 — Port G bit 0 |
| Pin 58 | RG1 — Port G bit 1 |
| Pin 59 | RG2 — Port G bit 2 |
| Pin 60 | RG3 — Port G bit 3 |
| Pin 61 | RG4 — Port G bit 4 |
| Pin 62 | MCLR — Master clear reset (active low) |
| Pin 63 | VSS — Ground reference |
| Pin 64 | VDD — Positive supply voltage |
Typical Applications
PIC18F66K80-H/PT is suitable for 6 applications: Automotive CAN Body Controller, Building Automation CAN Node, Elevator Control Unit, Industrial Sensor Hub, Pulse Oximeter Front-End, Power Conversion Controller.
Automotive CAN Body Controller
The PIC18F66K80-H/PT fits automotive body controllers because its integrated ECAN module provides CAN 2.0B bit-stamping at 1 Mbps while the 12-bit ADC samples multiplexed body sensors (door modules, seat occupancy, lighting feedback). AEC-Q100 qualification and the -40C to +150C temperature envelope let the part sit behind the dashboard where under-hood heat conducts through bulkheads. Its nanoWatt XLP sleep currents below 1 uA preserve quiescent battery drain during parked weeks, and 64 KB of FLASH holds J1939/OBD-II diagnostic stacks plus custom body-control firmware.
Recommended
Building Automation CAN Node
For BACnet/Modbus-over-CAN nodes in HVAC and lighting panels, the PIC18F66K80-H/PT's ECAN, 12-bit ADC, and 53 digital I/O handle sensor conditioning and relay/motor control within a single chip. The 1.8 V to 5.5 V supply range allows direct connection to 3.3 V or 5 V sensor rails without level shifters, and the -H grade tolerates plenum enclosure temperatures approaching +150C. With 64 KB of FLASH and 3.6 KB of RAM, the part runs lightweight TCP/IP or BACnet stacks while leaving headroom for custom control loops.
Recommended
Elevator Control Unit
Elevator car-top and machine-room controllers demand the +150C ceiling and AEC-Q100 screening of the PIC18F66K80-H/PT to survive proximity to drive cabinets and brake resistors. The ECAN peripheral aggregates motor position encoders, door interlocks, and safety-chain inputs over a single robust differential bus, while 12-bit ADC channels digitize load-weighing analog sensors. The PIC18 core's deterministic interrupt latency supports safety-critical SIL-rated firmware loops without RTOS overhead.
Recommended
Industrial Sensor Hub
The PIC18F66K80-H/PT serves industrial sensor hubs needing ECAN-connected 4-20 mA or 0-10 V analog inputs converted by its 11-channel 12-bit ADC, with digital I/O driving relays and indicator LEDs. The nanoWatt XLP sleep modes enable battery-backed wireless gateway nodes where average current must stay below 50 uA. 64 KB of FLASH supports Modbus RTU/ASCII, CANopen, and proprietary protocol stacks simultaneously, and the -40C to +150C range covers outdoor cabinet and process-control cabinet deployments.
Recommended
Pulse Oximeter Front-End
Per the Microchip PIC18F66K80 family datasheet, the part targets pulse-oximeter front-end designs where its 12-bit ADC digitizes photodiode current from red/IR LEDs at low duty cycle. The integrated ECAN module streams SpO2 data to a central patient monitor over a robust differential bus, replacing dedicated wired analog interfaces. The PIC18F66K80-H/PT's nanoWatt XLP modes extend battery life across multi-day ambulatory patient wear while the -H grade tolerates sterilization autoclave cycles.
Recommended
Power Conversion Controller
The PIC18F66K80-H/PT controls digital point-of-load converters and battery management systems where its 64 MHz core executes fast control loops and 12-bit ADC samples current/voltage feedback. The ECAN peripheral communicates module telemetry (cell voltage, temperature, state-of-charge) to a master BMS over a single CAN bus, eliminating analog harness weight in EV battery packs. -40C to +150C operation covers under-hood and battery-pack ambient temperatures typical of electric-vehicle powertrains.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F66K80-H/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F66K80-I/PT | PIC18F66K80-E/PT | PIC18F65K80-I/PT | PIC18F66K22-I/PT | PIC18F66J55-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (PT) | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same |
| FLASH Program Memory | 64 KB | 64 KB | 64 KB | 32 KB | 64 KB | 64 KB |
| Data RAM | 3.6 KB | 3.6 KB | 3.6 KB | 2 KB | 4 KB | 4 KB |
| Maximum CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 96 MHz |
| Integrated ECAN | Yes | Yes | Yes | Yes | No | No |
| ADC Resolution / Channels | 12-bit / 11 channels | 12-bit / 11 channels | 12-bit / 11 channels | 12-bit / 11 channels | 10-bit / 16 channels | 10-bit / 12 channels |
| Operating Temperature Range | -40C to +150C (-H grade, AEC-Q100) | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- AEC-Q100 +150C high-temperature grade with same silicon die as -I and -E variants (vs PIC18F66K80-I/PT)
- Integrated ECAN with full CAN 2.0B acceptance filtering (vs PIC18F66K22-I/PT)
- 12-bit ADC with 11 channels versus 10-bit on K22 and J55 series (vs PIC18F66J55-I/PT)
Design Notes
Decouple each VDD/VSS pair with a 100 nF ceramic capacitor placed within 2 mm of the pin, plus a single 10 uF tantalum or ceramic bulk capacitor on the supply rail. The PIC18F66K80-H/PT operates down to 1.8 V, so verify regulator headroom; for 5 V rails use an MCP1700 LDO. nanoWatt XLP sleep modes draw below 100 nA only if all peripherals are disabled and MCLR is held high via 10 kohm pull-up.
Although the -H grade tolerates +150C junction, the 64-pin TQFP (10x10 mm) has a theta_JA around 50 C/W on a 4-layer JEDEC test board. Estimated: at 64 MHz with all peripherals toggling, internal dissipation is around 100 mW, giving a self-heating rise of ~5C above ambient - well below the +150C ceiling but thermal copper pours are still recommended near VDD/VSS pins for AEC-Q100 margin.
Place the MCLR pull-up resistor (10 kohm to VDD) and the ICSP programming header (PGC/PGD on RB6/RB7, MCLR) within 50 mm of the part to avoid programming failures. Keep the ECAN CANTX/CANRX traces short and length-matched if running above 500 kbps; route them over an unbroken ground plane and place the MCP2551 transceiver within 20 mm. The 12-bit ADC accuracy degrades if analog and digital traces share the same routing layer without ground shielding.
Do not exceed 5.5 V on VDD or apply voltage to any pin before VDD ramps; this can trigger latch-up. Configure all unused I/O pins as outputs driving low (not inputs floating) to minimize sleep current. When migrating from -I grade to -H grade on an existing design, no firmware changes are needed - the silicon die is identical, but expect a +15-20% unit-cost premium and 4-6 week lead-time extension.
Compliance Information
AEC-Q100 qualified per Microchip product page (high-temperature -H grade). RoHS and lead-free per Microchip PIC18F66K80 family datasheet (DS39977).
