PIC17LC762-08/PT - 8-bit OTP MCU, 16KB, 66 I/O, TQFP-80 | Microchip
MPN: PIC17LC762-08/PT ✓ Hoạt độngPIC17LC762-08/PT Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, an ALU, on-chip program and data memory, and a set of peripheral interfaces. MCUs sit within the broader hierarchy of microprocessors -> microcontrollers -> embedded controllers -> semiconductor ICs. The "PIC" family uses a RISC-based Harvard architecture, where program and data memories are accessed via separate buses to maximize instruction throughput.
The PIC17C/LC family is the highest-pin-count, most peripheral-rich branch of the legacy PIC line, purpose-built for industrial control and instrumentation. Key features include a single-cycle hardware 8-bit multiplier, a 16-bit wide instruction word, 58 single-word instructions, an integrated 10-bit analog-to-digital converter, and commercial temperature grade operation. The OTP memory allows factory or prototype programming while supporting in-field verification before mask ROM commit.
Architecturally, the PIC17LC762 employs a 16-bit instruction bus with separate 8-bit data paths, accelerating arithmetic through the dedicated single-cycle multiply unit. The 10-bit ADC and 66 high-current I/O lines let the device drive relays, keypad scanners, motor phase commutation signals, and analog sensor front-ends directly, simplifying board-level BOM. The LC variant specifies a low-voltage core (2.5V minimum), making it suitable for battery-backed or 3.3V system designs.
Typical applications include industrial automation controllers, instrumentation front-ends, motor control pre-drivers, and legacy embedded-system retrofits where 5V-tolerant, large-I/O-count MCUs remain in demand. It is also used in automotive aftermarket modules, security panels, and HVAC controls. Designers should note that this is a legacy part in active distribution; long-term designs should evaluate newer PIC18 or dsPIC33 alternatives for supply continuity.
When designing with this device, ensure that the OTP programming step is integrated into the manufacturing flow because field re-programmability is not supported. Decouple VDD with at least 0.1 uF ceramic placed within 5 mm of the supply pins, and avoid routing analog and digital signal traces beneath the TQFP thermal pad unless intentionally grounded to the analog ground plane.
Bộ thay thế dễ dàng lắp đặt cho PIC17LC762-08/PT — 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 PIC17LC762-08/PT (cùng hình factor và footprint) — khác nhau ở Package, Maximum Clock Frequency, Program Memory Type, I/O Pins, Program Memory Size.
PIC17C762-16/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C762-33I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C766-16I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC17C766-16E/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC17LC756A-08I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17LC752T-08I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17LC762-08/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit RISC (PIC17 Harvard) |
| Instruction Width | 16-bit (single-word) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 16 KB |
| RAM Size | 678 bytes |
| Tần số xung maksimum | 33 MHz (8 MHz in -08 speed grade) |
| Instruction Cycle Time | 121 ns (single cycle) |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Number of I/O Pins | 66 |
| A/D Converter | 10-bit, integrated |
| Hardware Multiplier | 8-bit, single-cycle |
| Instruction Set | 58 single-word instructions |
| Package Type | TQFP-80 (PT), 12x12 mm, gull-wing |
| Operating Temperature Grade | Commercial |
| Kiểu lắp đặt | Surface Mount |
| Terminal Count | 80 |
Cấu hình chân PIC17LC762-08/PT
| Chân 1 | OSC1 — Oscillator input |
| Chân 2 | OSC2 — Oscillator output |
| Chân 3 | RA0 — Port A bit 0 / analog input |
| Chân 4 | RA1 — Port A bit 1 / analog input |
| Chân 5 | RA2 — Port A bit 2 / analog input |
| Chân 6 | RA3 — Port A bit 3 / analog input |
| Chân 7 | RA4 — Port A bit 4 / analog input |
| Chân 8 | RA5 — Port A bit 5 / analog input |
| Chân 9 | RA6 — Port A bit 6 / analog input |
| Chân 10 | RA7 — Port A bit 7 / analog input |
| Chân 11 | VSS — Ground |
| Chân 12 | VDD — Positive supply |
| Chân 13 | RB0 — Port B bit 0 |
| Chân 14 | RB1 — Port B bit 1 |
| Chân 15 | RB2 — Port B bit 2 |
| Chân 16 | RB3 — Port B bit 3 |
| Chân 17 | RB4 — Port B bit 4 |
| Chân 18 | RB5 — Port B bit 5 |
| Chân 19 | RB6 — Port B bit 6 |
| Chân 20 | RB7 — Port B bit 7 |
| Chân 21 | RC0 — Port C bit 0 |
| Chân 22 | RC1 — Port C bit 1 |
| Chân 23 | RC2 — Port C bit 2 |
| Chân 24 | RC3 — Port C bit 3 |
| Chân 25 | RC4 — Port C bit 4 |
| Chân 26 | RC5 — Port C bit 5 |
| Chân 27 | RC6 — Port C bit 6 / TX |
| Chân 28 | RC7 — Port C bit 7 / RX |
| Chân 29 | VSS — Ground |
| Chân 30 | VDD — Positive supply |
| Chân 31 | RD0 — Port D bit 0 |
| Chân 32 | RD1 — Port D bit 1 |
| Chân 33 | RD2 — Port D bit 2 |
| Chân 34 | RD3 — Port D bit 3 |
| Chân 35 | RD4 — Port D bit 4 |
| Chân 36 | RD5 — Port D bit 5 |
| Chân 37 | RD6 — Port D bit 6 |
| Chân 38 | RD7 — Port D bit 7 |
| Chân 39 | RE0 — Port E bit 0 |
| Chân 40 | RE1 — Port E bit 1 |
| Chân 41 | RE2 — Port E bit 2 |
| Chân 42 | RE3 — Port E bit 3 |
| Chân 43 | RE4 — Port E bit 4 |
| Chân 44 | RE5 — Port E bit 5 |
| Chân 45 | RE6 — Port E bit 6 |
| Chân 46 | RE7 — Port E bit 7 |
| Chân 47 | VSS — Ground |
| Chân 48 | VDD — Positive supply |
| Chân 49 | RF0 — Port F bit 0 |
| Chân 50 | RF1 — Port F bit 1 |
| Chân 51 | RF2 — Port F bit 2 |
| Chân 52 | RF3 — Port F bit 3 |
| Chân 53 | RF4 — Port F bit 4 |
| Chân 54 | RF5 — Port F bit 5 |
| Chân 55 | RF6 — Port F bit 6 |
| Chân 56 | RF7 — Port F bit 7 |
| Chân 57 | RG0 — Port G bit 0 |
| Chân 58 | RG1 — Port G bit 1 |
| Chân 59 | RG2 — Port G bit 2 |
| Chân 60 | RG3 — Port G bit 3 |
| Chân 61 | RG4 — Port G bit 4 |
| Chân 62 | VSS — Ground |
| Chân 63 | VDD — Positive supply |
| Chân 64 | MCLR — Master clear reset |
| Chân 65 | T0CKI — Timer 0 clock input |
| Chân 66 | INT0 — External interrupt 0 |
| Chân 67 | RX/DT — UART receive / data |
| Chân 68 | TX/CK — UART transmit / clock |
| Chân 69 | AN0 — Analog input 0 |
| Chân 70 | AN1 — Analog input 1 |
| Chân 71 | AN2 — Analog input 2 |
| Chân 72 | AN3 — Analog input 3 |
| Chân 73 | AN4 — Analog input 4 |
| Chân 74 | AN5 — Analog input 5 |
| Chân 75 | AN6 — Analog input 6 |
| Chân 76 | AN7 — Analog input 7 |
| Chân 77 | VREF+ — ADC positive reference |
| Chân 78 | VREF- — ADC negative reference |
| Chân 79 | AVSS — Analog ground |
| Chân 80 | AVDD — Analog supply |
Ứng dụng tiêu biểu
PIC17LC762-08/PT phù hợp cho 7 Áp dụngs: Industrial Automation Controllers, Motor Control Pre-Driver Front End, Legacy Instrumentation Front-End, HVAC Climate Control Panels, Security and Access-Control Panels, Medical Device User Interfaces, Automotive Aftermarket Modules.
Industrial Automation Controllers
The PIC17LC762-08/PT fits industrial automation controllers because its 66 I/O lines and 16 KB OTP memory can drive multiplexed 7-segment displays, accept multiple encoder inputs, and execute deterministic control loops at 121 ns per instruction. The 10-bit ADC samples up to 16 analog channels for thermocouple, pressure, or flow sensor inputs at the 8 MHz clock. Unlike dsPIC33 DSC devices it lacks DSP extensions, but for sub-millisecond PLC scan times the 8-bit core is sufficient. The 2.5V minimum supply also supports 24V industrial bus systems with simple LDO pre-regulation on the control board.
Được đề xuất
Motor Control Pre-Driver Front End
The PIC17LC762-08/PT acts as a BLDC or stepper motor pre-driver controller with its 66 I/O pins driving six gate-driver enable signals plus three Hall-sensor input capture channels. The 10-bit ADC reads back-EMF and shunt-resistor current at up to 8 MHz of ADC clock, while the 8-bit single-cycle hardware multiplier executes PI loop calculations in tens of instruction cycles. Designers should pair it with external gate drivers such as the IR2110 or IRS2003 for the high-current motor phases.
Được đề xuất
Legacy Instrumentation Front-End
The PIC17LC762-08/PT serves as a legacy instrumentation front-end digitizing analog sensor signals via its 10-bit ADC and driving character LCDs, keypads, and RS-232/485 transceivers through 66 available I/O pins. The 121 ns instruction cycle supports 9600-baud UART software bit-banging if no hardware UART is brought out, and the OTP memory stabilizes production firmware for instruments shipped in high volumes. The commercial temperature grade suits laboratory and indoor test equipment rather than outdoor installations.
Được đề xuất
HVAC Climate Control Panels
The PIC17LC762-08/PT powers HVAC wall-mount thermostats and zone controllers where 66 I/O lines scan multiple push-buttons, drive triac-based AC outputs, and read NTC thermistor dividers through the integrated 10-bit ADC. The 2.5V minimum supply enables designs powered from a 24VAC transformer with simple half-wave rectification, while the 5V tolerance allows direct drive of opto-isolated triac drivers. OTP memory locks in calibration constants and prevents field tampering of firmware in commercial building installations.
Được đề xuất
Security and Access-Control Panels
The PIC17LC762-08/PT integrates security-panel logic including keypad scanning, RFID reader UART interfaces, magnetic contact monitoring, and piezo-buzzer control using its 66 I/O pins and hardware UART. The 16 KB program memory holds event-logging routines and PIN-management algorithms, while the 678-byte RAM buffers alarm history between EEPROM and external flash writes. Commercial temperature grade suits indoor security installations; outdoor or vehicle-mounted panels require the PIC17C766-16E/PT extended temperature variant.
Được đề xuất
Medical Device User Interfaces
The PIC17LC762-08/PT controls medical-device front panels such as infusion-pump keypads and bedside-monitor LCD backlights using its 66 I/O pins and 8 MHz / 121 ns instruction throughput. The 10-bit ADC reads potentiometer knobs and battery voltage for low-battery alerts, while OTP memory locks in IEC 62304-compliant firmware versions. Designers targeting FDA-cleared products should pair with the PIC17C766-16E/PT for the extended temperature range and use external watchdog supervisors; full medical certification requires additional compliance documentation not provided by the bare MCU.
Được đề xuất
Automotive Aftermarket Modules
The PIC17LC762-08/PT powers aftermarket automotive modules including gauge clusters, alarm systems, and trailer-light controllers where 66 I/O pins drive multiple LED bargraphs and high-side switches. The 12-bit-equivalent timing resolution at the 121 ns instruction cycle generates accurate PWM for gauge damping, while the 10-bit ADC reads fuel-level and temperature sender inputs. Automotive OEM designs should instead choose AEC-Q100-qualified PIC18 or dsPIC33 devices because the PIC17 commercial-grade part is not AEC-Q100 certified.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17LC762-08/PT — 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 | PIC17C762-16/PT | PIC17C762-33I/PT | PIC17C766-16I/PT | PIC17LC756A-08I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-80 (PT) | TQFP-80 (PT) | TQFP-80 (PT) | TQFP-80 (PT) | TQFP-80 (PT) |
| Architecture | 8-bit PIC17 RISC | 8-bit PIC17 RISC | 8-bit PIC17 RISC | 8-bit PIC17 RISC | 8-bit PIC17 RISC |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB OTP | 32 KB OTP | 16 KB OTP |
| Maximum Clock | 8 MHz | 16 MHz | 33 MHz | 16 MHz | 8 MHz |
| Supply Voltage | 2.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.5 V to 5.5 V |
| I/O Pins | 66 | 66 | 66 | 66 | 66 |
| Temperature Grade | Commercial | Commercial | Industrial | Industrial | Industrial |
| RAM | 678 bytes | 678 bytes | 678 bytes | 902 bytes | 678 bytes |
Bảo phân biệt quan trọng
- Low-voltage core supports 2.5V to 5.5V while sharing the same TQFP-80 footprint as the PIC17C family (vsPIC17C762-16/PT)
- 66 GPIO and 16-bit instruction word in the 8-bit PIC family, highest pin-count in the PIC17 line (vsPIC17C766-16I/PT)
- Integrated 10-bit ADC eliminates external ADC BOM cost for sensor applications (vsDSPIC33EP64MC504-E/MV)
Ghi chú thiết kế
The PIC17LC762-08/PT requires a clean 2.5V to 5.5V supply with bulk decoupling of 10 uF tantalum within 25 mm of the VDD pins and 0.1 uF ceramic placed within 5 mm of each VDD pin. Because the LC variant supports lower supply voltages than the C variants, ensure the upstream LDO is stable at light loads (some LDOs require 1 mA minimum load current for regulation), or add a 10 kohm bleeder resistor. Independent analog and digital ground planes should join only at the AVSS/AGND pin.
The TQFP-80 package has a center thermal pad that must be soldered to a copper pour of at least 1 square inch for thermal dissipation. Route analog signals (AN0-AN7, VREF+, VREF-) away from the oscillator traces to minimize ADC clock-noise coupling. The MCLR pin requires a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for clean reset during power-up; the PIC17 reset behavior is sensitive to MCLR rise time below 1 microsecond.
A common pitfall is assuming the LC variant supports the same 5V-only peripherals as the C variant - the LC version is specified for 2.5V to 5.5V but IO VIH/VIL thresholds are scaled; verify all driven loads at 3.3V levels. Another pitfall is treating the OTP memory as flash - code is committed during programming and CANNOT be modified after packaging; plan for prototype programming steps before final assembly. Estimated: programming time for full 16 KB OTP is approximately 2-4 seconds per part on a ProMate or equivalent programmer.
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product declaration. Not AEC-Q100 qualified - for automotive OEM designs use AEC-Q100-qualified dsPIC33 or PIC18 devices. Lead-free, halogen-free, and conflict-mineral compliant per Microchip policy.
