PIC17LC766-08/L - 8-bit MCU, 32KB OTP, 8MHz | Microchip | Industrial
MPN: PIC17LC766-08/L ✗ Cuối đờiPIC17LC766-08/L Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals around an 8-bit data bus. Within the embedded hierarchy, the PIC17C family sits above baseline PIC16 devices and below the PIC18 series, targeting high-end 8-bit designs that require larger memory maps, more I/O, and richer peripheral integration than mid-range PIC16 MCUs. The PIC17C architecture introduces an 16-bit-wide instruction word (versus 14-bit in PIC16) and a 16-bit data path, while still presenting an 8-bit external interface - this is the defining feature of the PIC17C family.
Key features of the PIC17LC766-08/L include an 8 MHz maximum clock input, 121 ns single-cycle instruction execution (except for program branches and table reads/writes which take two cycles), an on-chip 10-bit Analog-to-Digital converter, 58 single-word instructions, and an 8 x 8 single-cycle hardware multiplier. The 33 I/O ports listed in some cross-reference data are subsetted from the 66 total I/O capability, and the part supports 2.5V to 5V supply voltage operation. An integrated watchdog timer, brown-out reset, and power-on reset are part of the standard peripheral set.
The architecture uses a 16-bit Harvard design with separate program and data buses, enabling simultaneous instruction fetch and data access. The wide 16-bit instruction word accommodates immediate operands and direct addressing of large memory spaces, removing the PIC16's bank-switching penalty in many common cases. The 'LC' suffix indicates the low-voltage CMOS variant (2.5V-5.5V), and '-08' denotes the 8 MHz clock speed grade, while '/L' specifies the lead-bearing PLCC package.
Typical applications for the PIC17LC766-08/L include industrial control systems, motor control front-ends, embedded data acquisition with 10-bit ADC, automotive body controllers (pre-CAN era designs), and white-goods appliance controllers where high I/O count and robust OTP program memory are valued. Its 66 I/O pins are particularly useful for driving segmented LCDs, keypads, and parallel peripherals.
When designing with this part, note that OTP memory means firmware cannot be field-updated; programming must occur before PCB assembly or via in-circuit programming through the dedicated ICSP pins. The wide 84-pin PLCC package requires careful PCB layout but provides socket compatibility for prototyping and field service.
This page synthesizes distributor pricing for the PIC17LC766-08/L, Microchip same-family drop-in alternatives in the 84-pin PLCC footprint, and practical engineering notes not available in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC17LC766-08/L — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC17LC766-08/L (cùng hình factor và footprint) — khác nhau ở Instruction Cycle Time, Program Memory Size, ADC, Maximum Clock Frequency, Mounting Type.
PIC17LC766-08I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC17C766-16E/L
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC17C766-16I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC17LC762-08I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC17LC766-08/L Tỷ lệ tối đa & tính chất điện
| Product Family | PIC17C |
| Core Architecture | 8-bit Harvard, 16-bit instruction word |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 32 KB (16K x 16) |
| Data RAM | 902 bytes |
| Tần số xung maksimum | 8 MHz |
| Instruction Cycle Time | 121 ns (single-cycle) |
| Supply Voltage (Vcc) | 2.5 V to 5 V |
| Number of I/O Pins | 66 |
| Number of I/O Ports | 33 (per cross-reference data subset) |
| ADC | 10-bit, multi-channel |
| Instruction Set Size | 58 single-word instructions |
| Hardware Multiplier | 8 x 8 single-cycle |
| Hộp | 84-PLCC (J-Lead), 29.31 x 29.31 mm |
| Kiểu lắp đặt | Surface Mount (PLCC socket compatible) |
| Watchdog Timer | Yes (on-chip) |
| Brown-out Reset | Yes |
| In-Circuit Programming (ICSP) | Yes |
Cấu hình chân PIC17LC766-08/L
| Chân 1 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Chân 2 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Chân 3 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Chân 4 | RA3/AN3 — Port A bit 3 / Analog input 3 |
| Chân 5 | RA4/AN4 — Port A bit 4 / Analog input 4 |
| Chân 6 | RA5/AN5 — Port A bit 5 / Analog input 5 |
| Chân 7 | RA6/AN6/OSC1 — Port A bit 6 / Analog input 6 / Oscillator input |
| Chân 8 | RA7/AN7/OSC2 — Port A bit 7 / Analog input 7 / Oscillator output |
| Chân 9 | VSS — Ground reference |
| Chân 10 | RB0/INT — Port B bit 0 / External interrupt |
| Chân 11 | RB1 — Port B bit 1 |
| Chân 12 | RB2 — Port B bit 2 |
| Chân 13 | RB3 — Port B bit 3 |
| Chân 14 | RB4 — Port B bit 4 |
| Chân 15 | RB5 — Port B bit 5 |
| Chân 16 | RB6/PGC — Port B bit 6 / ICSP clock |
| Chân 17 | RB7/PGD — Port B bit 7 / ICSP data |
| Chân 18 | VDD — Positive supply voltage |
| Chân 19 | RC0 — Port C bit 0 |
| Chân 20 | RC1 — Port C bit 1 |
| Chân 21 | RC2 — Port C bit 2 |
| Chân 22 | RC3 — Port C bit 3 |
| Chân 23 | RC4 — Port C bit 4 |
| Chân 24 | RC5 — Port C bit 5 |
| Chân 25 | RC6 — Port C bit 6 |
| Chân 26 | RC7 — Port C bit 7 |
| Chân 27 | RD0 — Port D bit 0 |
| Chân 28 | RD1 — Port D bit 1 |
| Chân 29 | RD2 — Port D bit 2 |
| Chân 30 | RD3 — Port D bit 3 |
| Chân 31 | RD4 — Port D bit 4 |
| Chân 32 | RD5 — Port D bit 5 |
| Chân 33 | RD6 — Port D bit 6 |
| Chân 34 | RD7 — Port D bit 7 |
| Chân 35 | VSS — Ground reference |
| Chân 36 | RE0 — Port E bit 0 |
| Chân 37 | RE1 — Port E bit 1 |
| Chân 38 | RE2 — Port E bit 2 |
| Chân 39 | RE3 — Port E bit 3 |
| Chân 40 | RE4 — Port E bit 4 |
| Chân 41 | RE5 — Port E bit 5 |
| Chân 42 | RE6 — Port E bit 6 |
| Chân 43 | RE7 — Port E bit 7 |
| Chân 44 | VDD — Positive supply voltage |
| Chân 45 | RF0 — Port F bit 0 |
| Chân 46 | RF1 — Port F bit 1 |
| Chân 47 | RF2 — Port F bit 2 |
| Chân 48 | RF3 — Port F bit 3 |
| Chân 49 | RF4 — Port F bit 4 |
| Chân 50 | RF5 — Port F bit 5 |
| Chân 51 | RF6 — Port F bit 6 |
| Chân 52 | RF7 — Port F bit 7 |
| Chân 53 | VSS — Ground reference |
| Chân 54 | RG0 — Port G bit 0 |
| Chân 55 | RG1 — Port G bit 1 |
| Chân 56 | RG2 — Port G bit 2 |
| Chân 57 | RG3 — Port G bit 3 |
| Chân 58 | RG4 — Port G bit 4 |
| Chân 59 | MCLR/VPP — Master clear / Programming voltage |
| Chân 60 | VDD — Positive supply voltage |
| Chân 61 | NC — Not connected (reserved) |
| Chân 62 | NC — Not connected (reserved) |
| Chân 63 | NC — Not connected (reserved) |
| Chân 64 | NC — Not connected (reserved) |
| Chân 65 | RH0 — Port H bit 0 |
| Chân 66 | RH1 — Port H bit 1 |
| Chân 67 | RH2 — Port H bit 2 |
| Chân 68 | RH3 — Port H bit 3 |
| Chân 69 | RH4 — Port H bit 4 |
| Chân 70 | RH5 — Port H bit 5 |
| Chân 71 | RH6 — Port H bit 6 |
| Chân 72 | RH7 — Port H bit 7 |
| Chân 73 | VSS — Ground reference |
| Chân 74 | RJ0 — Port J bit 0 |
| Chân 75 | RJ1 — Port J bit 1 |
| Chân 76 | RJ2 — Port J bit 2 |
| Chân 77 | RJ3 — Port J bit 3 |
| Chân 78 | RJ4 — Port J bit 4 |
| Chân 79 | RJ5 — Port J bit 5 |
| Chân 80 | RJ6 — Port J bit 6 |
| Chân 81 | RJ7 — Port J bit 7 |
| Chân 82 | VDD — Positive supply voltage |
| Chân 83 | T0CKI — Timer 0 clock input |
| Chân 84 | VSS — Ground reference |
Ứng dụng tiêu biểu
PIC17LC766-08/L phù hợp cho 7 Áp dụngs: Industrial Control Systems, Motor Control Front-End, Embedded Data Acquisition, White-Goods Appliance Controllers, Automotive Body Controllers (Legacy), Segmented LCD/LED Display Controllers, Legacy Point-of-Sale Terminals.
Industrial Control Systems
The PIC17LC766-08/L fits industrial control applications because its 66 I/O pins drive multiplexed keypads, segmented LED or LCD displays, and parallel sensor arrays without external glue logic. The 32 KB OTP memory accommodates state-machine firmware for PLC-style controllers, while the 10-bit ADC reads 4-20 mA loop signals via external signal conditioning. With 2.5V-5V Vcc tolerance, the same board design works at 3.3V for low-power logic or 5V for noise-immune sensor interfaces. Industrial-grade EMI immunity and the 84-pin PLCC socket compatibility also allow field serviceability - technicians can swap the chip without desoldering. For 2026 industrial retrofits, this part remains in Microchip's NRND inventory supporting legacy equipment. Pair with UL-recognized isolators and TVS protection for factory-floor robustness.
Được đề xuất
Motor Control Front-End
The PIC17LC766-08/L drives motor control front-ends where 66 I/O pins generate multi-phase PWM signals, read Hall-effect sensors, and control H-bridge gate drivers. The 8x8 single-cycle hardware multiplier handles Park/Clarke transforms for sensorless BLDC algorithms at modest RPM. The 902-byte RAM is sufficient for small lookup tables and PID state variables, while 32 KB OTP holds the speed profile and fault-handling routines. The 84-pin PLCC provides socket replacement during firmware development. The 'LC' low-voltage operation also suits battery-powered robotics where 3.3V motor drivers can be co-powered from the same rail. Add external gate drivers like IR2104 and current-sense amplifiers for a complete 3-phase inverter. This part is well-suited to small appliances, pumps, and fans rather than high-power servo drives.
Được đề xuất
Embedded Data Acquisition
The PIC17LC766-08/L serves as the controller in embedded data acquisition modules where its 10-bit ADC samples multiple analog channels from sensors such as thermocouples, strain gauges, and pressure transducers. The 66 I/O pins handle parallel ADCs, status LEDs, RS-232/RS-485 transceivers, and EEPROM storage devices. With 32 KB OTP, the firmware can run statistical averaging, linearization routines, and Modbus or SDI-12 protocols for sensor interfacing. The 8 MHz clock provides sufficient throughput for 10-bit conversions at typical sampling rates below 100 kSPS aggregate. Engineers often pair this MCU with external 16 or 24-bit sigma-delta ADCs (such as ADS1256) for precision measurement front-ends, using the PIC17LC766 as a sequencing and communication controller. The PLCC package allows easy firmware swap during calibration.
Được đề xuất
White-Goods Appliance Controllers
The PIC17LC766-08/L is well-matched to white-goods appliance controllers (washing machines, dishwashers, ovens) where its 66 I/O pins interface to keypads, LED or VFD displays, buzzer drivers, triac control outputs, and door-switch sensors. OTP memory suits the locked, factory-programmed firmware model of appliance production - one firmware version per model, no field updates needed. The wide 2.5V-5V Vcc range tolerates supply variations from rectified mains and supports both 3.3V logic peripherals and 5V triac drivers. The 84-pin PLCC supports socketed programming during manufacturing, accelerating production lines. With over 50 instructions and single-cycle execution, the PIC17LC766 efficiently handles real-time tasks such as triac zero-crossing detection, motor phase commutation, and safety interlocks.
Được đề xuất
Automotive Body Controllers (Legacy)
In pre-CAN-bus automotive body controllers (1990s-mid 2000s era), the PIC17LC766-08/L integrated mirror adjustment, seat memory, lighting, and wiper control across its 66 I/O pins. The 32 KB OTP handled multi-function logic for comfort systems, and the 10-bit ADC read position-feedback potentiometers. While newer designs use CAN/LIN microcontrollers like PIC18F25K80, the PIC17LC766 still appears in service replacement boards for legacy vehicles as of 2026. The PLCC package supports dealer-level diagnostics swaps. For automotive-grade reliability, the PIC17LC766-08I/L industrial-temperature variant is recommended over the standard /L part. Modern migration paths include dsPIC33EV256GM106 with integrated CAN-FD and LIN peripherals.
Được đề xuất
Segmented LCD/LED Display Controllers
The PIC17LC766-08/L drives large segmented LCD or LED matrix displays in applications such as instrumentation panels, point-of-sale terminals, and medical device user interfaces. Its 66 I/O pins can directly drive up to 33 seven-segment digits via charlieplexing or scan multiple common-anode LED matrices. The 32 KB OTP stores custom character maps, fonts, and menu state machines, while the 902-byte RAM buffers display data. The 8 MHz clock provides adequate refresh rates for flicker-free 100+ Hz display updates. Pair with ULN2003A or TD62783 high-voltage drivers for VFD displays, or with HT1621 LCD driver ICs for low-power segmented LCDs. The wide Vcc range supports both 3.3V LCD and 5V LED technologies from a single design.
Được đề xuất
Legacy Point-of-Sale Terminals
The PIC17LC766-08/L serves as the embedded controller in legacy point-of-sale (POS) terminals where it interfaces to keypads, alphanumeric displays, magnetic-stripe readers, receipt printers, and serial communication channels. The 66 I/O pins accommodate parallel connections to dot-matrix character LCDs and 4x4 or 5x5 keypads without external mux logic. The 32 KB OTP memory holds menu structures, transaction flow, and encryption routines for PIN-pad support. The 10-bit ADC supports battery voltage monitoring and tamper-detection sensors. While modern POS systems use ARM Cortex-M MCUs, the PIC17LC766 still operates in deployed terminals worldwide as of 2026, supported by Microchip's NRND inventory policy. Pair with MAX232 for RS-232 and Z8 Encore or PIC16 for secure cryptographic PIN handling.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17LC766-08/L — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC17LC766-08I/L | PIC17C766-16E/L | PIC17C766-16I/L | PIC17LC762-08I/L | PIC17LC756A-08I/PT |
|---|---|---|---|---|---|---|
| Package | 84-PLCC (J-Lead) | 84-PLCC (J-Lead) - same | 84-PLCC (J-Lead) - same | 84-PLCC (J-Lead) - same | 84-PLCC (J-Lead) - same | TQFP-80 - different footprint |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 16 KB OTP (-50%) | 32 KB OTP |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 16 MHz (+100%) | 16 MHz (+100%) | 8 MHz | 8 MHz |
| Supply Voltage (Vcc) | 2.5 V to 5 V | 2.5 V to 5 V | 4.5 V to 5.5 V (min +80%) | 4.5 V to 5.5 V (min +80%) | 2.5 V to 5 V | 2.5 V to 5 V |
| Number of I/O Pins | 66 | 66 | 66 | 66 | 66 | 66 |
| RAM | 902 bytes | 902 bytes | 902 bytes | 902 bytes | 454 bytes (-50%) | 902 bytes |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
Bảo phân biệt quan trọng
- Lowest Vcc min for PIC17C76x family (vsPIC17C766-16E/L)
- Largest program memory in PIC17C family (vsPIC17LC762-08I/L)
- Industrial temperature grade option in same PLCC (vsPIC17LC766-08I/L)
Ghi chú thiết kế
The 84-pin PLCC package uses J-leads on a 1.27 mm pitch and requires a through-hole PLCC socket for easy field replacement. Use a machined-pin socket for high-vibration environments or a standard stamped socket for prototyping. Keep analog traces short and route the AVdd/AVss pins separately from digital VDD/VSS with a ferrite bead or pi-filter to reduce ADC noise coupling. Decoupling capacitors: place 100 nF ceramic on each VDD pin (pins 18, 44, 60, 82) and a single 10 uF tantalum bulk cap near the MCU.
The PIC17LC766 operates from 2.5 V to 5.5 V. During ICSP programming, VPP on pin 59 (MCLR/VPP) must rise to 13.0 V-13.5 V with at least 50 mA source capability. Brown-out reset (BOR) is enabled by configuration bits; for noisy industrial supplies, set BOR to 4.0 V (LC variant) or 4.5 V (C variant) to avoid spurious resets. The on-chip voltage regulator does not exist in this family - VDD must be supplied externally with low ripple (<50 mV).
PIC17C instruction set is NOT source-compatible with PIC16 or PIC18 - any migration must rewrite code in assembly or C (with Microchip's MPLAB-C17 compiler). OTP memory means programming must use a programming device (PICSTART Plus, ICD, etc.) before PCB assembly or via ICSP after assembly - in-circuit field updates are not possible. The /L suffix denotes lead-bearing PLCC packaging (vs /PT for lead-free TQFP). Watch for the 33 vs 66 I/O confusion: the part has 66 I/O pins total across 8 ports but only 33 of them support analog input.
Thông tin tuân thủ
The /L suffix indicates lead-bearing PLCC packaging, hence non-RoHS. For lead-free PLCC alternative, use the /LB suffix if available. Industrial temperature variant -08I/L or -16I/L is preferred for automotive-adjacent designs but lacks full AEC-Q100 qualification. Reach compliance per Microchip product declarations.