PIC17LC766T-08/L - 8-bit CMOS MCU, 8MHz, 32KB EPROM, CDIP-40
MPN: PIC17LC766T-08/L ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.8 | $168.00 |
| 100 | $14.95 | $1,495.00 |
| 500 | $12.4 | $6,200.00 |
| 1,000 | $9.85 | $9,850.00 |
PIC17LC766T-08/L Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory, working RAM, and programmable I/O peripherals. The PIC17Cxx family represents Microchip's high-tier 8-bit architecture, positioned between the baseline PIC16 family and the 16-bit dsPIC/PIC24 families in the PICmicro hierarchy. The 'LC' suffix denotes a low-voltage CMOS variant (2.5V to 5V operation) suitable for battery-powered and energy-conscious designs where the higher-voltage PIC17C parts would be unsuitable.
Key features include a RISC instruction set with only 58 single-word instructions, single-cycle execution at 121 ns (except for program branches and table reads/writes which are two-cycle), a built-in 10-bit A/D converter, and a commercial operating temperature grade. The architecture provides 16-bit-wide instructions and an 8-bit data path, with hardware multiplier support for efficient arithmetic operations.
The PIC17LC766 architecture combines Harvard bus separation with a deep instruction pipeline, achieving throughput of up to 8 MIPS at 8 MHz. The OTP EPROM allows factory or prototype programming while supporting field re-programming during development, with on-chip peripherals including timers, USART, and capture/compare/PWM modules typical of the PIC17 family.
Typical applications include industrial control systems, instrumentation, motor control interfaces, and embedded communication controllers where moderate code density (32 KB) and a robust 8-bit architecture with extensive I/O are required. The wide 2.5V to 5V supply range allows direct connection to 3.3V or 5V system buses.
When designing with this device, ensure external oscillator stability and adequate decoupling on VDD pins. For new designs, consider migrating to the pin-compatible PIC18 family for greater code density and modern peripherals, while preserving the existing toolchain investment.
This page synthesizes current distributor pricing, lifecycle status, drop-in PIC17 family alternatives, and practical design notes not found on the Microchip datasheet alone.
Drop-in alternatives for PIC17LC766T-08/L — 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 PIC17LC766T-08/L (same form factor and footprint) — differing in Program Memory Size, Instruction Cycle Time, Data Bus Width, I/O Pins, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC17LC766-08I/L
✅ Drop-In✓ In Stock
$10.85 / Unit
View Datasheet →PIC17LC766-08I/PT
✅ Drop-In✓ In Stock
$11.5 / Unit
View Datasheet →PIC17LC766-08/L
✅ Drop-In✓ In Stock
$10.95 / Unit
View Datasheet →PIC17LC756AT-08I/L
✅ Drop-In✓ In Stock
$10.95 / Unit
View Datasheet →PIC17LC762-08I/L
✅ Drop-In✓ In Stock
$6.5 / Unit
View Datasheet →PIC17LC752T-08/L
✅ Drop-In✓ In Stock
$8.85 / Unit
View Datasheet →PIC17LC766T-08/L Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit RISC PIC17 |
| Data Bus Width | 16 bit (instruction) / 8 bit (data) |
| Maximum Clock Speed | 8 MHz |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 32 KB |
| Supply Voltage Range | 2.5 V to 5.0 V |
| I/O Ports | 33 |
| Number of Instructions | 58 single-word |
| Instruction Cycle Time | 121 ns (single-cycle) |
| ADC | 10-bit |
| Package Type | CDIP-40 (Plastic DIP, 0.600 inch) |
| Package Code | QCCJ |
| Terminal Form | J-BEND (through-hole) |
| Operating Temperature Grade | Commercial |
| Lifecycle Stage | Active |
| RoHS Status | Compliant |
PIC17LC766T-08/L Pin Configuration
| Pin 1 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 2 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 3 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Pin 4 | RA3/AN3 — Port A bit 3 / Analog input 3 |
| Pin 5 | RA4/AN4/T0CKI — Port A bit 4 / Analog input 4 / Timer0 clock input |
| Pin 6 | RA5/AN5/SS — Port A bit 5 / Analog input 5 / SPI slave select |
| Pin 7 | RE0/RD — Port E bit 0 / Read control |
| Pin 8 | RE1/WR — Port E bit 1 / Write control |
| Pin 9 | RE2/CS — Port E bit 2 / Chip select |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | VSS — Ground reference |
| Pin 12 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 13 | OSC2/CLKOUT — Oscillator output / clock output |
| Pin 14 | RC0/T1CKI — Port C bit 0 / Timer1 clock input |
| Pin 15 | RC1/CCP2 — Port C bit 1 / Capture/Compare/PWM 2 |
| Pin 16 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM 1 |
| Pin 17 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Pin 18 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Pin 19 | RC5/SDO — Port C bit 5 / SPI data out |
| Pin 20 | RC6/TX/CK — Port C bit 6 / USART TX / USART clock |
| Pin 21 | RC7/RX/DT — Port C bit 7 / USART RX / USART data |
| Pin 22 | RB0/INT0 — Port B bit 0 / External interrupt 0 |
| Pin 23 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Pin 24 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| Pin 25 | RB3/INT3 — Port B bit 3 / External interrupt 3 |
| Pin 26 | RB4/INT4 — Port B bit 4 / External interrupt 4 |
| Pin 27 | RB5/INT5 — Port B bit 5 / External interrupt 5 |
| Pin 28 | RB6/INT6 — Port B bit 6 / External interrupt 6 |
| Pin 29 | RB7/INT7 — Port B bit 7 / External interrupt 7 |
| Pin 30 | RD0/PSP0 — Port D bit 0 / Parallel slave port bit 0 |
| Pin 31 | RD1/PSP1 — Port D bit 1 / Parallel slave port bit 1 |
| Pin 32 | RD2/PSP2 — Port D bit 2 / Parallel slave port bit 2 |
| Pin 33 | RD3/PSP3 — Port D bit 3 / Parallel slave port bit 3 |
| Pin 34 | RD4/PSP4 — Port D bit 4 / Parallel slave port bit 4 |
| Pin 35 | RD5/PSP5 — Port D bit 5 / Parallel slave port bit 5 |
| Pin 36 | RD6/PSP6 — Port D bit 6 / Parallel slave port bit 6 |
| Pin 37 | RD7/PSP7 — Port D bit 7 / Parallel slave port bit 7 |
| Pin 38 | VDD — Positive supply voltage |
| Pin 39 | VSS — Ground reference |
| Pin 40 | MCLR/VPP — Master clear reset / Programming voltage |
Typical Applications
PIC17LC766T-08/L is suitable for 6 applications: Industrial Control Systems, Test and Measurement Instrumentation, Motor Control Interfaces, Embedded Communication Controllers, Automotive Body Electronics (Legacy), Consumer Appliance Control.
Industrial Control Systems
The PIC17LC766T-08/L is well suited to industrial control system designs where its 8-bit RISC architecture, 32 KB EPROM, and 33 I/O pins provide ample headroom for sensor interfacing, actuator control, and supervisory logic. Operating from 2.5V to 5.0V, it can interface directly with both 3.3V and 5V industrial sensors and drivers. The 8 MHz clock with 121 ns instruction cycle enables fast loop times for PID control loops, while the 10-bit ADC supports precision analog input monitoring of temperature, pressure, or current. Industrial-grade variants in the PIC17C76x family extend the operating range to -40C to +85C, but this commercial-grade part suits temperature-controlled cabinet installations.
Recommended
Test and Measurement Instrumentation
The PIC17LC766T-08/L fits bench-top test and measurement equipment where its 10-bit ADC, multiple timers, and 33 I/O pins enable multi-channel data acquisition. The 32 KB EPROM accommodates complex measurement routines, calibration tables, and menu-driven user interfaces. With 121 ns single-cycle instruction execution at 8 MHz, the MCU achieves high sample throughput for digital multimeters and oscilloscope front-ends. The wide 2.5V to 5.0V supply range allows direct battery or USB-powered operation. Designers should note that for higher-resolution measurements (12-bit or 16-bit ADC), migration to a PIC18 or dsPIC family MCU is recommended.
Recommended
Motor Control Interfaces
The PIC17LC766T-08/L provides the timers, PWM capability, and I/O count needed for motor control interface boards driving DC, stepper, or BLDC motors. The 32 KB EPROM stores complex commutation tables, while the 8 MIPS throughput ensures smooth PWM generation at motor-control switching frequencies. The 33 I/O pins accommodate multiple encoder inputs, limit switches, and H-bridge control signals. Operating at 3.3V or 5V, it interfaces easily with modern gate drivers. For high-power industrial motor drives, consider the automotive-grade PIC17 family variants or migrate to dsPIC33EP MC series for dedicated motor-control peripherals.
Recommended
Embedded Communication Controllers
The PIC17LC766T-08/L works well as an embedded communication controller in routers, gateways, or serial-protocol bridges where its hardware USART and 33 I/O pins support multiple serial channels simultaneously. The 32 KB EPROM accommodates protocol stacks for UART, SPI, or I2C bridging, and the 8 MHz clock with hardware multiplier ensures real-time protocol handling. The 2.5V to 5.0V supply range suits both legacy 5V peripherals and modern 3.3V transceivers. For high-throughput networking, consider migration to PIC18 or PIC32 families with built-in Ethernet or CAN peripherals, but the PIC17LC766T-08/L remains a solid choice for legacy protocol conversion tasks.
Recommended
Automotive Body Electronics (Legacy)
The PIC17LC766T-08/L and its automotive-grade siblings (with Q1 or I suffixes) historically served body-electronics modules like seat controllers, mirror adjusters, and lighting drivers. The 32 KB EPROM and 33 I/O pins handle multiple load controls, while the 10-bit ADC reads sensor inputs for position feedback. Note that the standard PIC17LC766T-08/L is commercial temperature grade and NOT AEC-Q100 qualified; for production automotive designs, choose the automotive-grade PIC17 family variants. Designers migrating to new automotive platforms should consider PIC18F or dsPIC33A families with AEC-Q100 qualification and CAN-FD peripherals.
Recommended
Consumer Appliance Control
The PIC17LC766T-08/L targets consumer appliance control boards such as washing machine controllers, dishwasher interfaces, or HVAC zone controllers. Its 32 KB EPROM stores user-interface logic and appliance state machines, while the 33 I/O pins drive keypads, displays, relays, and sensor inputs. The 2.5V to 5.0V supply range simplifies integration with appliance power supplies, and the 10-bit ADC reads thermistors, water-level sensors, and other analog inputs. The OTP EPROM suits cost-sensitive consumer appliances where one-time programming is acceptable. Modern equivalent designs may migrate to PIC16F or PIC18F families for lower cost and better availability.
Recommended
Recommended Products Summary
Engineering reference data for PIC17LC766T-08/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC17LC766-08I/L | PIC17LC766-08I/PT | PIC17LC766-08/L | PIC17LC756AT-08I/L | PIC17LC762-08I/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | CDIP-40 (Plastic DIP) | CDIP-40 (same) | TQFP-80 (SMD variant) | CDIP-40 (same) | CDIP-40 (same) | CDIP-40 (same) |
| Architecture | 8-bit RISC PIC17 | 8-bit RISC PIC17 | 8-bit RISC PIC17 | 8-bit RISC PIC17 | 8-bit RISC PIC17 | 8-bit RISC PIC17 |
| Clock Speed | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Program Memory (EPROM) | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 16 KB (-50%) |
| Supply Voltage | 2.5 V to 5.0 V | 2.5 V to 5.0 V | 2.5 V to 5.0 V | 2.5 V to 5.0 V | 2.5 V to 5.0 V | 2.5 V to 5.0 V |
| Temperature Grade | Commercial | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| I/O Ports | 33 | 33 | 33 | 33 | 33 | 33 |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
Key Differentiators
- 32 KB EPROM is the largest in PIC17 family (vs PIC17LC756AT-08I/L)
- Industrial temperature grade option (vs PIC17LC766-08/L)
- Active lifecycle status with Microchip direct support (vs PIC17C766 (older 5V-only variant))
Design Notes
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 10 and 38) and a single 10 uF bulk capacitor near the IC. For designs operating above 4 MHz, add a 10 uF tantalum or low-ESR ceramic bulk capacitor. The PIC17LC766T-08/L accepts 2.5V to 5.0V; ensure the supply stays within regulation during inrush and load transients to avoid code-fetch errors and watchdog resets.
For designs using an external crystal, connect a fundamental-mode crystal between OSC1 (pin 12) and OSC2 (pin 13) with appropriate load capacitors (typically 15-33 pF) to ground. For highest noise immunity, use a 4-pin crystal oscillator module instead of a 2-pin crystal. The MCLR pin (pin 40) should be tied to VDD through a 10 kohm pull-up resistor and a 100 nF capacitor for proper reset operation.
Do not confuse the PIC17LC766 with the PIC18F family - the instruction sets are NOT compatible. The PIC17 family is a mature product line; for new designs, evaluate whether the PIC18F or dsPIC33 families meet your requirements with modern peripherals. When migrating code, the C compiler toolchain may require adjustments due to register-file and stack differences between PIC17 and PIC18 architectures.
The CDIP-40 package has a typical theta_JA of approximately 50 C/W in still air, which is sufficient for the PIC17LC766T-08/L's typical 5 mA active supply current (estimated: 5V * 5 mA = 25 mW, junction rise 1.25 C above ambient). No heatsink is required for normal commercial-temperature operation. For extended industrial-temperature applications, verify self-heating remains within the device's thermal limits.
Route the oscillator traces short and symmetric with a ground guard ring to minimize EMI pickup. Place analog input traces (RA0-RA5) away from digital switching lines to reduce ADC noise coupling. For programming/debug, reserve access to PGC and PGD pins (shared with RB6/RB7 on PIC17) and ensure ICSP connector footprint is included on the PCB even if not populated in production.
Compliance Information
RoHS compliant per Microchip product page. /L suffix denotes lead-free finish. Standard variant is NOT AEC-Q100 qualified; choose PIC17 automotive variants for production automotive designs.
