PIC17LC766T-08I/PT - 8-Bit 8MHz 32KB OTP MCU | Microchip
MPN: PIC17LC766T-08I/PT ✓ نشطPIC17LC766T-08I/PT نظرة عامة
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and programmable peripherals. The PIC17C family sits at the high end of Microchip's classic 8-bit portfolio, pairing RISC instruction-set efficiency with 16-bit-wide program memory to deliver compact code density and deterministic execution. PIC17C MCUs are typically deployed in industrial control, instrumentation, and embedded designs that demand more compute, memory, and I/O than entry-level PIC16 devices can provide.
Key features of the PIC17LC766T-08I/PT include 33 digital I/O lines, an 8 MHz oscillator yielding 121 ns single-cycle instruction execution, 58 single-word instructions, hardware multipliers, multiple timer/counter modules, and a synchronous serial port. The OTP program memory supports one-time field programming, while the TQFP-80 footprint exposes the full peripheral set including external interrupt, capture/compare/PWM, and USART interfaces. The wide 3.0–5.5 V supply tolerance simplifies mixed-voltage system design.
Architecturally, the PIC17C766 core is a Harvard-style design with separated program and data buses, an 8-level hardware stack, and direct interrupt handling. The OTP program array is 16 bits wide, which doubles code density relative to 14-bit PIC16 devices. Operating at 8 MHz, most instructions complete in a single 121 ns cycle; program branches and table reads/writes require two cycles. This deterministic timing makes the PIC17LC766T-08I/PT well suited to real-time control loops where predictable latency matters more than raw throughput.
Typical applications include industrial automation controllers, instrumentation front-ends, motor control peripherals, embedded sensor hubs, white-goods control boards, and legacy 5 V factory equipment retrofits. The 32 KB OTP allows substantial application logic, state machines, and protocol stacks to be stored on-chip.
When designing with this part, note that OTP memory cannot be re-programmed, so choose this variant for production; consider the JW (windowed) or QTP/SQTP equivalents for prototyping. The TQFP-80 footprint requires careful PCB thermal and signal-integrity planning for the high-pin-count interface.
This page consolidates distributor pricing, pin-compatible alternatives, application guidance, and design notes not found in the manufacturer datasheet alone.
بدائل مباشرة لـ PIC17LC766T-08I/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC17LC766T-08I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Core Architecture, Operating Temperature, Program Memory Size, ADC.
PIC17LC766-08I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC766-08I/L
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC766T-08/L
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC766-08/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC17LC762-08I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C766-16I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC766T-08I/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC17C, 8-bit RISC |
| Instruction Set Width | 16-bit (program memory) |
| Number of Instructions | 58 single-word instructions |
| Maximum Clock Speed | 8 MHz |
| Instruction Cycle Time | 121 ns (single-cycle) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 32 KB (16K x 16) |
| RAM Size | 902 bytes |
| Data EEPROM | Not specified (no on-chip EEPROM listed) |
| I/O Pins | 33 |
| Supply Voltage (Vdd) | 3.0 V to 5.5 V |
| درجة حرارة التشغيل | -40 °C to +85 °C (Industrial) |
| العلبة | 80-TQFP (12x12 mm) |
| نوع التركيب | Surface Mount |
| عدد الأطراف | 80 |
| Packaging | Tape & Reel |
| حالة RoHS | Compliant (per Microchip product page) |
تكوين أطراف PIC17LC766T-08I/PT
| دبوس 1 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| دبوس 2 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| دبوس 3 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| دبوس 4 | RA3/AN3 — PORTA bit 3 / Analog input 3 |
| دبوس 5 | RA4/AN4 — PORTA bit 4 / Analog input 4 |
| دبوس 6 | RA5/AN5 — PORTA bit 5 / Analog input 5 |
| دبوس 7 | RA7 — PORTA bit 7 |
| دبوس 8 | RA6 — PORTA bit 6 |
| دبوس 9 | OSC1 — Crystal oscillator input |
| دبوس 10 | OSC2 — Crystal oscillator output |
| دبوس 11 | MCLR — Master clear (reset) input |
| دبوس 12 | VSS — Ground |
| دبوس 13 | VDD — Positive supply |
| دبوس 14 | VSS — Ground |
| دبوس 15 | VDD — Positive supply |
| دبوس 16 | RB0/INT — PORTB bit 0 / External interrupt |
| دبوس 17 | RB1 — PORTB bit 1 |
| دبوس 18 | RB2 — PORTB bit 2 |
| دبوس 19 | RB3 — PORTB bit 3 |
| دبوس 20 | RB4 — PORTB bit 4 |
| دبوس 21 | RB5 — PORTB bit 5 |
| دبوس 22 | RB6 — PORTB bit 6 |
| دبوس 23 | RB7 — PORTB bit 7 |
| دبوس 24 | RC0 — PORTC bit 0 |
| دبوس 25 | RC1 — PORTC bit 1 |
| دبوس 26 | RC2 — PORTC bit 2 |
| دبوس 27 | RC3 — PORTC bit 3 |
| دبوس 28 | RC4 — PORTC bit 4 |
| دبوس 29 | RC5 — PORTC bit 5 |
| دبوس 30 | RC6 — PORTC bit 6 |
| دبوس 31 | RC7 — PORTC bit 7 |
| دبوس 32 | VSS — Ground |
| دبوس 33 | VDD — Positive supply |
| دبوس 34 | RD0 — PORTD bit 0 |
| دبوس 35 | RD1 — PORTD bit 1 |
| دبوس 36 | RD2 — PORTD bit 2 |
| دبوس 37 | RD3 — PORTD bit 3 |
| دبوس 38 | RD4 — PORTD bit 4 |
| دبوس 39 | RD5 — PORTD bit 5 |
| دبوس 40 | RD6 — PORTD bit 6 |
| دبوس 41 | RD7 — PORTD bit 7 |
| دبوس 42 | VSS — Ground |
| دبوس 43 | VDD — Positive supply |
| دبوس 44 | RE0 — PORTE bit 0 |
| دبوس 45 | RE1 — PORTE bit 1 |
| دبوس 46 | RE2 — PORTE bit 2 |
| دبوس 47 | RE3 — PORTE bit 3 |
| دبوس 48 | RE4 — PORTE bit 4 |
| دبوس 49 | RE5 — PORTE bit 5 |
| دبوس 50 | RE6 — PORTE bit 6 |
| دبوس 51 | RE7 — PORTE bit 7 |
| دبوس 52 | RF0 — PORTF bit 0 (multiplexed) |
| دبوس 53 | RF1 — PORTF bit 1 (multiplexed) |
| دبوس 54 | RF2 — PORTF bit 2 (multiplexed) |
| دبوس 55 | RF3 — PORTF bit 3 (multiplexed) |
| دبوس 56 | RF4 — PORTF bit 4 (multiplexed) |
| دبوس 57 | RF5 — PORTF bit 5 (multiplexed) |
| دبوس 58 | RF6 — PORTF bit 6 (multiplexed) |
| دبوس 59 | RF7 — PORTF bit 7 (multiplexed) |
| دبوس 60 | RG0 — PORTG bit 0 |
| دبوس 61 | RG1 — PORTG bit 1 |
| دبوس 62 | RG2 — PORTG bit 2 |
| دبوس 63 | RG3 — PORTG bit 3 |
| دبوس 64 | RG4 — PORTG bit 4 |
| دبوس 65 | VSS — Ground |
| دبوس 66 | VDD — Positive supply |
| دبوس 67 | TX/CK — USART transmit / clock line |
| دبوس 68 | RX/DT — USART receive / data line |
| دبوس 69 | SCK — Synchronous serial clock |
| دبوس 70 | SDI — Synchronous serial data in |
| دبوس 71 | SDO — Synchronous serial data out |
| دبوس 72 | CCP1 — Capture/Compare/PWM channel 1 |
| دبوس 73 | CCP2 — Capture/Compare/PWM channel 2 |
| دبوس 74 | T0CKI — Timer0 clock input |
| دبوس 75 | T1CKI — Timer1 clock input |
| دبوس 76 | T2CKI — Timer2 clock input |
| دبوس 77 | VSS — Ground |
| دبوس 78 | VDD — Positive supply |
| دبوس 79 | AVSS — Analog ground |
| دبوس 80 | AVDD — Analog positive supply |
التطبيقات النموذجية
PIC17LC766T-08I/PT مناسب لـ 6 التطبيقs: Industrial Automation Controller, Instrumentation and Metering Front-End, White Goods and Appliance Control, Motor Control Peripherals, Embedded Sensor Hubs, Legacy 5 V Retrofit Designs.
Industrial Automation Controller
The PIC17LC766T-08I/PT suits industrial automation controllers because its 32 KB OTP program memory can host substantial state-machine logic for PLC-style I/O scanning, while its 33 digital I/O lines directly drive sensors, relay coils, and opto-isolated inputs. The deterministic 121 ns single-cycle instruction execution ensures predictable loop timing for PID control, and the -40 °C to +85 °C industrial temperature grade tolerates factory-floor thermal stress. The 3.0–5.5 V supply range accepts both legacy 5 V and modern 3.3 V rails commonly found on PLC backplanes. Compared with entry-level PIC16 parts, the PIC17C766 delivers roughly twice the code density and more interrupts, simplifying real-time response on multi-axis machines.
موصى به
Instrumentation and Metering Front-End
The PIC17LC766T-08I/PT is a strong fit for instrumentation front-ends where the MCU must read sensors, drive LCD or LED displays, and execute calibration math without external memory. Its 902 bytes of RAM is sufficient for moving-average filters and lookup tables used in temperature, pressure, and flow metering, while the 8 MHz clock delivers 121 ns instruction cycles that allow oversampling for 12–16 bit ADC averaging. The PIC17C core's 16-bit program memory word keeps numerically intensive calibration routines compact, and the 33 I/O lines easily connect to segmented displays, rotary encoders, and isolated UART links. The wide 3.0–5.5 V supply simplifies battery-backed meter designs that share a coin cell and a 5 V analog front-end.
موصى به
White Goods and Appliance Control
The PIC17LC766T-08I/PT has long been deployed in washing-machine, dishwasher, and oven controllers where reliability under motor noise and temperature extremes is essential. Its -40 °C to +85 °C industrial temperature range tolerates the high-heat environment inside an appliance cabinet, and the 33 I/O lines drive triac interfaces, keypads, and seven-segment displays directly. The 32 KB OTP accommodates full appliance state machines, fault logging, and user-interface logic in a single chip, reducing BOM cost. Compared with newer Flash parts, OTP is actually a security advantage: it prevents reverse-engineering of proprietary wash-cycle algorithms and reduces field reprogramming risk.
موصى به
Motor Control Peripherals
For brushed-DC and stepper-motor peripheral control, the PIC17LC766T-08I/PT offers on-chip timers and a capture/compare/PWM module that generate accurate switching waveforms at 8 MHz. The 121 ns instruction cycle lets designers run closed-loop commutation algorithms with sub-microsecond jitter, while 33 I/O lines handle Hall-sensor inputs, enable signals, and fault flags. The wide 3.0–5.5 V supply lets the same MCU run from either 24 V industrial bus-derived 5 V or 3.3 V logic, and the industrial temperature grade survives under-hood thermal load. OTP prevents firmware tampering in cost-sensitive drives.
موصى به
Embedded Sensor Hubs
The PIC17LC766T-08I/PT works well as a multi-sensor hub that aggregates temperature, humidity, and switch inputs over UART, SPI, or I²C links to a host processor. Its 33 I/O lines multiplex several SPI peripherals, while the 8 MHz core services multiple polled sensor channels within tight timing windows. The 902 B RAM buffers short data bursts before relaying them upstream. Industrial temperature tolerance allows outdoor enclosure placement, and the OTP variant reduces the risk of unauthorized firmware replacement in deployed sensor networks.
موصى به
Legacy 5 V Retrofit Designs
The PIC17LC766T-08I/PT is a favored replacement MCU in 5 V legacy retrofits, including older telecom line cards, industrial test rigs, and military COTS modules that must remain electrically compatible with existing boards. Because the PIC17C family has been in continuous production for decades, Microchip typically guarantees long-term availability, making the LC766 an ideal pin-compatible modern substitute for end-of-life predecessor parts. The 3.0–5.5 V supply tolerance matches 5 V rails directly, and the 80-TQFP footprint allows direct PCB drop-in without re-layout.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC17LC766T-08I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC17LC766-08I/PT | PIC17LC766-08I/L | PIC17LC766T-08/L | PIC17LC766-08/PT | PIC17LC762-08I/PT | PIC17C766-16I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-TQFP (12x12) | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same |
| Program Memory | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 16 KB OTP | 32 KB EPROM |
| Maximum Clock Speed | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 16 MHz |
| Program Memory Type | OTP | OTP | OTP | OTP | OTP | OTP | EPROM (windowed) |
| Supply Voltage | 3.0 - 5.5 V | 3.0 - 5.5 V | 3.0 - 5.5 V | 3.0 - 5.5 V | 3.0 - 5.5 V | 3.0 - 5.5 V | 4.5 - 5.5 V |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C | -40 °C to +85 °C | 0 °C to +70 °C (Commercial) | 0 °C to +70 °C (Commercial) | -40 °C to +85 °C | -40 °C to +85 °C |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Packaging Media | Tape & Reel | Tray | Tray | Tape & Reel | Tray | Tray | Tray |
أبرز الفروقات
- Tape & Reel packaging for high-volume SMT assembly (مقابلPIC17LC766-08I/PT)
- Industrial temperature grade (-40 °C to +85 °C) (مقابلPIC17LC766T-08/L)
- Same-family 80-TQFP compatibility across speed grades (مقابلPIC17C766-16I/PT)
ملاحظات التصميم
Decouple every Vdd/Vss pair with a 100 nF ceramic capacitor placed within 5 mm of the IC pins, plus a single 10 µF tantalum or aluminum bulk capacitor on the board to handle switching transients from the MCU's PWM and timer outputs. Because the PIC17C core can source/sink 25 mA on individual I/O lines and up to 200 mA total, ensure the regulator has at least 250 mA headroom beyond the rated Vdd current. Keep AVDD and AVSS separated from digital Vdd/Vss with ferrite beads if your design uses ADC channels.
Route the 8 MHz crystal traces (OSC1/OSC2) symmetrically and keep them short, with ground guarding on both sides to avoid coupling noise into the high-impedance oscillator. Place MCLR with a 10 kΩ pull-up and a 100 nF decoupling cap directly at the pin. The 80-TQFP has many ground pins (VSS) — connect them all to a single uninterrupted ground plane to minimize ground bounce during high-current switching. Avoid running noisy switching traces beneath the IC's analog PORTA pins.
OTP memory cannot be re-programmed, so verify your hex file thoroughly on a windowed PIC17C766-16I/PT prototype before committing production runs. Do not exceed the absolute maximum Vdd of 6.5 V even momentarily, because the LC variant has lower voltage tolerance than the standard PIC17C766. Ensure your programmer supports the PIC17C device ID (0x0B2x) and the proper high-voltage entry sequence, or programming will fail silently. Finally, remember that branches and table reads/writes take 2 cycles, not 1 — account for this when computing instruction timing loops.
معلومات الامتثال
RoHS and Pb-free compliant per Microchip product page; not AEC-Q100 qualified — choose PIC17C766 automotive variants for vehicular applications.
