PIC17LC766T-08I/PT - 8-Bit 8MHz 32KB OTP MCU | Microchip
MPN: PIC17LC766T-08I/PT ✓ פעילPIC17LC766T-08I/PT סקירה
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.
חלופות תחליף ישיר עבור PIC17LC766T-08I/PT — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC17LC766T-08I/PT (אותו גורם צורה וטביעת רגל) — שונים ב Package, Core Architecture, Operating Temperature, Program Memory Size, ADC.
PIC17LC766-08I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC17LC766-08I/L
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC17LC766T-08/L
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC17LC766-08/PT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC17LC762-08I/PT
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC17C766-16I/PT
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC17LC766T-08I/PT דירוגים מרביים ומאפיינים חשמליים
| 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 |
| טמפרטורת פעולה | -40 °C to +85 °C (Industrial) |
| מארז | 80-TQFP (12x12 mm) |
| סוג הרכבה | Surface Mount |
| מספר פינים | 80 |
| Packaging | Tape & Reel |
| סטטוס RoHS | Compliant (per Microchip product page) |
תצורת פינים של PIC17LC766T-08I/PT
| פין 1 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| פין 2 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| פין 3 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| פין 4 | RA3/AN3 — PORTA bit 3 / Analog input 3 |
| פין 5 | RA4/AN4 — PORTA bit 4 / Analog input 4 |
| פין 6 | RA5/AN5 — PORTA bit 5 / Analog input 5 |
| פין 7 | RA7 — PORTA bit 7 |
| פין 8 | RA6 — PORTA bit 6 |
| פין 9 | OSC1 — Crystal oscillator input |
| פין 10 | OSC2 — Crystal oscillator output |
| פין 11 | MCLR — Master clear (reset) input |
| פין 12 | VSS — Ground |
| פין 13 | VDD — Positive supply |
| פין 14 | VSS — Ground |
| פין 15 | VDD — Positive supply |
| פין 16 | RB0/INT — PORTB bit 0 / External interrupt |
| פין 17 | RB1 — PORTB bit 1 |
| פין 18 | RB2 — PORTB bit 2 |
| פין 19 | RB3 — PORTB bit 3 |
| פין 20 | RB4 — PORTB bit 4 |
| פין 21 | RB5 — PORTB bit 5 |
| פין 22 | RB6 — PORTB bit 6 |
| פין 23 | RB7 — PORTB bit 7 |
| פין 24 | RC0 — PORTC bit 0 |
| פין 25 | RC1 — PORTC bit 1 |
| פין 26 | RC2 — PORTC bit 2 |
| פין 27 | RC3 — PORTC bit 3 |
| פין 28 | RC4 — PORTC bit 4 |
| פין 29 | RC5 — PORTC bit 5 |
| פין 30 | RC6 — PORTC bit 6 |
| פין 31 | RC7 — PORTC bit 7 |
| פין 32 | VSS — Ground |
| פין 33 | VDD — Positive supply |
| פין 34 | RD0 — PORTD bit 0 |
| פין 35 | RD1 — PORTD bit 1 |
| פין 36 | RD2 — PORTD bit 2 |
| פין 37 | RD3 — PORTD bit 3 |
| פין 38 | RD4 — PORTD bit 4 |
| פין 39 | RD5 — PORTD bit 5 |
| פין 40 | RD6 — PORTD bit 6 |
| פין 41 | RD7 — PORTD bit 7 |
| פין 42 | VSS — Ground |
| פין 43 | VDD — Positive supply |
| פין 44 | RE0 — PORTE bit 0 |
| פין 45 | RE1 — PORTE bit 1 |
| פין 46 | RE2 — PORTE bit 2 |
| פין 47 | RE3 — PORTE bit 3 |
| פין 48 | RE4 — PORTE bit 4 |
| פין 49 | RE5 — PORTE bit 5 |
| פין 50 | RE6 — PORTE bit 6 |
| פין 51 | RE7 — PORTE bit 7 |
| פין 52 | RF0 — PORTF bit 0 (multiplexed) |
| פין 53 | RF1 — PORTF bit 1 (multiplexed) |
| פין 54 | RF2 — PORTF bit 2 (multiplexed) |
| פין 55 | RF3 — PORTF bit 3 (multiplexed) |
| פין 56 | RF4 — PORTF bit 4 (multiplexed) |
| פין 57 | RF5 — PORTF bit 5 (multiplexed) |
| פין 58 | RF6 — PORTF bit 6 (multiplexed) |
| פין 59 | RF7 — PORTF bit 7 (multiplexed) |
| פין 60 | RG0 — PORTG bit 0 |
| פין 61 | RG1 — PORTG bit 1 |
| פין 62 | RG2 — PORTG bit 2 |
| פין 63 | RG3 — PORTG bit 3 |
| פין 64 | RG4 — PORTG bit 4 |
| פין 65 | VSS — Ground |
| פין 66 | VDD — Positive supply |
| פין 67 | TX/CK — USART transmit / clock line |
| פין 68 | RX/DT — USART receive / data line |
| פין 69 | SCK — Synchronous serial clock |
| פין 70 | SDI — Synchronous serial data in |
| פין 71 | SDO — Synchronous serial data out |
| פין 72 | CCP1 — Capture/Compare/PWM channel 1 |
| פין 73 | CCP2 — Capture/Compare/PWM channel 2 |
| פין 74 | T0CKI — Timer0 clock input |
| פין 75 | T1CKI — Timer1 clock input |
| פין 76 | T2CKI — Timer2 clock input |
| פין 77 | VSS — Ground |
| פין 78 | VDD — Positive supply |
| פין 79 | AVSS — Analog ground |
| פין 80 | AVDD — Analog positive supply |
יישומים טיפוסיים
PIC17LC766T-08I/PT מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC17LC766T-08I/PT — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Tape & Reel packaging for high-volume SMT assembly (לעומתPIC17LC766-08I/PT)
- Industrial temperature grade (-40 °C to +85 °C) (לעומתPIC17LC766T-08/L)
- Same-family 80-TQFP compatibility across speed grades (לעומתPIC17C766-16I/PT)
הערות תכנון
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.
מידע על תאימות
RoHS and Pb-free compliant per Microchip product page; not AEC-Q100 qualified — choose PIC17C766 automotive variants for vehicular applications.
