PIC17C766T-16/PT - 8-Bit 16MHz OTP MCU, 32KB, 80-TQFP | Microchip
MPN: PIC17C766T-16/PT ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $24.5 | $24.50 |
| 10 | $22.1 | $221.00 |
| 100 | $19.85 | $1,985.00 |
| 500 | $18.2 | $9,100.00 |
| 1,000 | $16.95 | $16,950.00 |
PIC17C766T-16/PT Overview
A PIC17C series microcontroller is part of Microchip's high-performance 8-bit CMOS EPROM/OTP MCU family, positioned between the PIC16C mid-range and PIC18 enhanced architectures in the taxonomy: PIC17C -> PIC16C/PIC17C/PIC18 family -> 8-bit microcontroller -> MCU -> semiconductor. The PIC17C line is upwards compatible with the PIC16C5X, PIC12CXXX, and PIC16CXX instruction sets, giving designers an easy migration path while gaining additional timers, capture/PWM peripherals, and 16 channels of 10-bit ADC.
Key features include 66 general-purpose I/O pins, 50 programmable I/O ports, integrated peripherals (I2C, SPI, and UART/USART), 4 capture inputs, 3 PWM outputs, external memory addressing, and 16 channels of 10-bit A/D converter. The device supports a 4.5 V to 5.5 V supply range, offers a commercial operating temperature grade, and is housed in a plastic TQFP-80 surface-mount package with gull-wing leads, providing a compact 12x12 mm footprint for high-pin-count embedded designs.
The PIC17C766T-16/PT architecture is built on a RISC core with only 58 single-word instructions, simplifying code development while still delivering high throughput via 121 ns instruction cycles (except 2-cycle branches and table reads/writes). The CMOS EPROM/OTP process technology combines high performance with low power consumption, and the integrated hardware multiplier accelerates arithmetic operations.
Typical applications include industrial control systems, motor control, automotive body and chassis electronics, embedded instrumentation, sensor interfaces, and consumer electronics requiring high I/O count and ADC channels. The 16 MHz operating speed and rich peripheral set also suit HVAC controllers, security systems, and power-conversion front-end controllers.
When designing with this device, ensure the chosen development tools (MPLAB XC8, PICSTART Plus, PRO MATE II, or MPLAB PM3 programmers) match the OTP device programming model. Because the memory is OTP, code revisions require a new device. Verify decoupling, oscillator stability, and MCLR reset hardware as described in the Microchip PIC17C766 datasheet.
This page synthesizes distributor pricing, drop-in alternatives, application guidance, and practical design notes - going beyond what is available in the manufacturer datasheet or a typical distributor listing to give engineers a single, citation-ready reference for the PIC17C766T-16/PT.
Drop-in alternatives for PIC17C766T-16/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 PIC17C766T-16/PT (same form factor and footprint) — differing in Package, I/O Pins, Data Bus Width, RoHS Status, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC17C766-16/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC17C766-16I/PT
✅ Drop-In✓ In Stock
$11.5 / Unit
View Datasheet →PIC17C766-16E/PT
✅ Drop-In✓ In Stock
$9.95 / Unit
View Datasheet →PIC17C766T-33/PT
✅ Drop-In✓ In Stock
$11.5 / Unit
View Datasheet →PIC17C756AT-33E/PT
✅ Drop-In✓ In Stock
$10.36 / Unit
View Datasheet →PIC17C762-16/PT
✅ Drop-In✓ In Stock
$9.25 / Unit
View Datasheet →PIC17C752-16E/PT
✅ Drop-In✓ In Stock
$10.85 / Unit
View Datasheet →PIC17C766T-16/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Family | PIC17C |
| Data Bus Width | 8-bit (16-bit instruction) |
| Maximum Clock Frequency | 16 MHz |
| Instruction Cycle Time | 121 ns (single-cycle, except branches) |
| Program Memory Size | 32 KB (16K x 16) |
| Program Memory Type | OTP (One-Time Programmable) |
| RAM Size | 902 bytes |
| I/O Pins | 66 (50 programmable ports) |
| ADC | 10-bit, 16 channels |
| PWM Outputs | 3 |
| Capture Inputs | 4 |
| Communication Peripherals | I2C, SPI, UART/USART |
| Supply Voltage | 4.5 V to 5.5 V |
| Operating Temperature Grade | Commercial |
| Package | TQFP-80 (PT), 12x12 mm |
| Mounting Type | Surface Mount (Gull-wing) |
| Number of Instructions | 58 (single-word) |
| Hardware Multiplier | Yes (single-cycle 8x8) |
| External Memory Interface | Yes |
PIC17C766T-16/PT tqfp-80 (pt), 12x12 mm Pin Configuration Guide
Pin configuration for PIC17C766T-16/PT (tqfp-80 (pt), 12x12 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC17C766T-16/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC17C766T-16/PT is suitable for 6 applications: Industrial Motor Control, HVAC Climate Control Systems, Security and Access Control Panels, Automotive Body Electronics, Embedded Instrumentation and Data Acquisition, Consumer Appliance Control.
Industrial Motor Control
The PIC17C766T-16/PT fits industrial motor control because it combines 16 MHz (8.25 MIPS) throughput with 3 PWM outputs, 4 capture inputs for encoder feedback, and 16 channels of 10-bit ADC for current and voltage sensing. Its 32 KB OTP program memory holds complete BLDC, stepper, or brushed-DC commutation tables including lookup-driven sine profiles. The 66 I/O pins drive gate-driver ICs such as the IR2104 directly while leaving pins for Hall sensors, tachometers, and emergency-stop interlocks. Placed as the main controller on a 5 V logic rail, it executes PID loops at sub-millisecond intervals - faster than typical 16 MHz PIC16 designs - enabling tight torque and speed regulation in conveyor, pump, and small-servo applications. Migration to PIC18F8520 should be considered for new motor-control platforms needing flash-based firmware updates.
Recommended
HVAC Climate Control Systems
The PIC17C766T-16/PT suits HVAC climate control boards where 16 ADC channels monitor temperature, humidity, pressure, and airflow sensors simultaneously. Its 32 KB OTP holds multi-zone thermostat logic, defrost-cycle state machines, and Modbus/SCI communication stacks without external memory. The I2C and SPI peripherals interface with digital temperature sensors, EEPROM, and DAC chips for variable-speed blower control. Operating from 4.5 V to 5.5 V with commercial temperature grade, it slots into 5 V wall-controller and rooftop-unit designs. The 80-pin TQFP (12x12 mm) accommodates the many discrete I/O lines required for relay banks, triac triggers, and LCD keypad interfacing common in commercial HVAC equipment.
Recommended
Security and Access Control Panels
The PIC17C766T-16/PT serves security alarm and access-control panels because its 32 KB OTP firmware, 16 ADC channels, and UART/USART support multi-zone intrusion detection with keypads, glass-break sensors, and PIR motion detectors. The 66 I/O pins handle reed switches, sirens, and relay-driven door strikes without external glue logic. OTP memory is desirable for security applications because it prevents firmware reverse-engineering and tampering. With 8.25 MIPS performance, the MCU scans 32 zones within a few milliseconds - critical for UL-listed alarm panels. Pair it with an external RTC, EEPROM, and GSM modem for full system functionality.
Recommended
Automotive Body Electronics
The PIC17C766T-16/PT fits automotive body modules such as central locking, mirror control, seat memory, and instrument cluster I/O boards where 16 ADC channels monitor position feedback, current draw, and switch states. Its 32 KB OTP holds CAN-friendly firmware (with external CAN controller) plus PWM-driven mirror and seat motors. The wide I/O count supports multiple switch matrices and H-bridge drivers. Although the commercial temperature grade limits under-hood use, it remains attractive for cabin electronics with mild thermal stress. The 80-TQFP package and 16 MHz throughput deliver a balance of cost and capability for body-control ECUs.
Recommended
Embedded Instrumentation and Data Acquisition
The PIC17C766T-16/PT supports compact bench-top instruments and data-acquisition front ends. Its 16-channel 10-bit ADC multiplexes thermocouples, strain gauges, and process-voltage signals at moderate sampling rates. UART/USART links to PC-based logging software, while I2C/SPI connect to LCD displays, DAC chips, and external ADCs for higher precision. The 32 KB OTP stores calibration coefficients, linearization tables, and command interpreters for SCPI-like protocols. At 8.25 MIPS, the MCU performs real-time RMS, peak detection, and threshold-crossing math without offloading to DSP. The 80-TQFP footprint enables fan-out to BNC connectors and instrumentation amplifiers on a single board.
Recommended
Consumer Appliance Control
The PIC17C766T-16/PT drives white-goods and small-appliance controllers (washing machines, dishwashers, microwave ovens, induction cooktops) where 16 ADC channels monitor motor current, temperature, water level, and door interlocks. The 3 PWM outputs regulate heater elements, fan speeds, and inverter-driven compressor stages. With 66 I/O pins, it directly drives triac optocouplers, relay coils, and 7-segment displays - eliminating external I/O expanders. OTP memory locks firmware against unauthorized copy, important for branded consumer products. The 80-TQFP package and 16 MHz throughput meet mid-complexity appliance firmware needs while the 4.5 V to 5.5 V supply rails align with linear-regulator-derived logic power.
Recommended
Recommended Products Summary
Engineering reference data for PIC17C766T-16/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC17C766-16/PT | PIC17C766-16I/PT | PIC17C766-16E/PT | PIC17C766T-33/PT | PIC17C756AT-33E/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-80 (PT), 12x12 mm | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same |
| Maximum Clock | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 33 MHz | 33 MHz |
| Program Memory | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 16 KB OTP |
| Temperature Grade | Commercial | Commercial | Industrial -40C to +85C | Extended -40C to +125C | Commercial | Extended -40C to +125C |
| Delivery Format | Tape & Reel | Tray | Tray | Tray | Tape & Reel | Tape & Reel |
| ADC Channels | 16 channels, 10-bit | 16 channels, 10-bit | 16 channels, 10-bit | 16 channels, 10-bit | 16 channels, 10-bit | 12 channels, 10-bit |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
Key Differentiators
- Highest memory density in the PIC17C family at 80-TQFP (vs PIC17C756AT-33E/PT)
- More ADC channels than PIC17C752 family (vs PIC17C752-16E/PT)
- Commercial temp grade for low-cost applications (vs PIC17C766-16I/PT)
- Pin-to-pin speed upgrade path to PIC17C766T-33/PT (vs PIC17C766T-33/PT)
Design Notes
Estimated: The PIC17C766T-16/PT operates from a single 4.5 V to 5.5 V supply. Decouple VDD pins with 100 nF ceramic capacitors placed within 5 mm of each supply pin, and add a bulk 10 uF tantalum or ceramic capacitor near the package. The PIC17C766 has multiple VDD/VSS pairs; per the Microchip datasheet each analog VDD pin (AVDD) requires its own low-ESR decoupling. Use a ferrite bead or LC filter if the analog supply is shared with a noisy digital rail. Brown-out and MCLR reset hardware should follow Microchip's PIC17C reference design.
The PIC17C766T-16/PT's 16 MHz instruction throughput derives from an external clock applied to OSC1, or a crystal across OSC1/OSC2. Use a fundamental-mode crystal rated for 20 pF load, with load capacitors sized per the crystal manufacturer's CL specification minus the MCU's stray capacitance (typically 5-10 pF per pin). For high-EMI environments, gate the oscillator with a metal shield can to avoid radiated-clock interference on analog ADC channels.
Do NOT assume PIC18F8520 is a drop-in replacement - despite Microchip's migration recommendation, the pinouts differ and firmware must be recompiled for the PIC18 architecture. Treat the OTP memory as write-once; every code change requires a new device, raising NRE cost in development. Configure unused I/O as outputs (not inputs) to avoid floating-pin shoot-through current. Enable the watchdog timer for industrial applications to recover from firmware lockup. Always read the errata sheet for the PIC17C766 silicon revision in use, as the family has documented peripheral quirks.
Compliance Information
RoHS and lead-free per Microchip product page; PIC17C766T-16/PT is not AEC-Q100 qualified (commercial temperature grade). For automotive applications requiring AEC-Q100, evaluate PIC18F family microcontrollers instead.
