PIC17LC762-08I/PT - 8-Bit 16KB EPROM MCU, 66 I/O | Microchip
MPN: PIC17LC762-08I/PT ✗ Cuối đờiPIC17LC762-08I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and programmable I/O peripherals. The PIC17 family was Microchip's first architecture to use a 16-bit instruction word with an 8-bit data path (modified Harvard architecture) and is widely regarded as the precursor to the modern PIC18 and dsPIC families. Unlike the 12-bit and 14-bit core PIC16 parts, the PIC17 offers a richer instruction set of 58 single-word instructions, a single-cycle hardware multiplier, and a 121 ns instruction cycle at 33 MHz - making it suitable for control loops and signal processing tasks beyond what a baseline PIC16 can handle.
Key features include a 10-bit successive-approximation analog-to-digital converter (ADC) with up to 12 input channels, two 8-bit timers plus one 16-bit timer/counter, a USART with RS-485 support, an SSP module for SPI and I2C, a capture/compare/PWM (CCP) module, and 16K x 16 words of OTP program memory. The device also integrates a watchdog timer with its own on-chip RC oscillator for fail-safe operation.
Architecturally, the PIC17LC762 uses an enhanced 16-bit instruction pipeline, a hardware 8-bit x 8-bit multiplier that completes in one instruction cycle, and a 16-level deep hardware stack. The LC variant specifically supports low-voltage operation down to 2.5V, distinguishing it from the 5V-only PIC17C762. This part is now mature and remains useful for legacy industrial and embedded designs, though new designs typically use PIC18 or dsPIC33 parts.
Typical applications include industrial process control, motor control front-ends, instrumentation data acquisition, automotive body electronics (non-safety), legacy embedded systems, and sensor interfacing boards that require more I/O than a 28-pin PIC16 part can offer but do not need the complexity of a dsPIC. The wide 66-I/O count makes it a fit for human-machine interface (HMI) panels and large keypad/display matrices.
When designing with this device, note that OTP memory cannot be reprogrammed in-circuit. For development, use the windowed (JW) UV-erasable ceramic version, or migrate to the flash-based PIC18F family for new designs. The 80-pin TQFP requires a 4-layer PCB with proper thermal vias under the exposed pad for reliable operation above 25 MHz.
This page synthesizes distributor stock and pricing data, drop-in compatible same-package alternatives from the PIC17C/PIC17LC families, and practical design notes for the PIC17LC762 that are not collated on any single distributor page.
Bộ thay thế dễ dàng lắp đặt cho PIC17LC762-08I/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 PIC17LC762-08I/PT (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Program Memory Type, Program Memory Size, Instruction Cycle Time.
PIC17LC762-08I/L
✅ Drop-InLiên 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 →PIC17C762-16I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C762-16/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17LC756AT-08I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17LC762-08I/PT Tỷ lệ tối đa & tính chất điện
| Product Family | PIC17 |
| Core Architecture | 8-bit RISC, 16-bit instruction word |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 16 KB (8K x 16 instructions) |
| RAM Size | 678 bytes |
| Number of I/O Pins | 66 |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Tần số xung maksimum | 33 MHz |
| Instruction Cycle Time | 121 ns (single cycle) |
| ADC | 10-bit, up to 12 channels |
| Timers | Two 8-bit + One 16-bit Timer/Counter |
| Serial Interfaces | USART (RS-485), SSP (SPI/I2C) |
| Hộp | TQFP-80 (PT), 12x12 mm |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC17LC762-08I/PT
| Chân 1 | OSC1 — Crystal oscillator input |
| Chân 2 | OSC2 — Crystal oscillator output |
| Chân 3 | MCLR — Master clear reset (active low) |
| Chân 4 | RA0/AN0 — Port A bit 0 / ADC input 0 |
| Chân 5 | RA1/AN1 — Port A bit 1 / ADC input 1 |
| Chân 6 | RA2/AN2 — Port A bit 2 / ADC input 2 |
| Chân 7 | RA3/AN3 — Port A bit 3 / ADC input 3 |
| Chân 8 | RA4/AN4/T0CKI — Port A bit 4 / ADC input 4 / Timer 0 clock |
| Chân 9 | RA5/AN5 — Port A bit 5 / ADC input 5 |
| Chân 10 | RA6/AN6 — Port A bit 6 / ADC input 6 |
| Chân 11 | RA7/AN7 — Port A bit 7 / ADC input 7 |
| Chân 12 | VSS — Ground |
| Chân 13 | VDD — Positive supply voltage |
| Chân 14 | RB0/INT — Port B bit 0 / External interrupt |
| Chân 15 | RB1/AN8 — Port B bit 1 / ADC input 8 |
| Chân 16 | RB2/AN9 — Port B bit 2 / ADC input 9 |
| Chân 17 | RB3/AN10 — Port B bit 3 / ADC input 10 |
| Chân 18 | RB4/AN11 — Port B bit 4 / ADC input 11 |
| Chân 19 | RB5 — Port B bit 5 |
| Chân 20 | RB6 — Port B bit 6 |
| Chân 21 | RB7 — Port B bit 7 |
| Chân 22 | RC0 — Port C bit 0 |
| Chân 23 | RC1 — Port C bit 1 |
| Chân 24 | RC2 — Port C bit 2 |
| Chân 25 | RC3 — Port C bit 3 |
| Chân 26 | RC4 — Port C bit 4 |
| Chân 27 | RC5 — Port C bit 5 |
| Chân 28 | RC6/TX/CK — Port C bit 6 / USART TX |
| Chân 29 | RC7/RX/DT — Port C bit 7 / USART RX |
| Chân 30 | VSS — Ground |
| Chân 31 | VDD — Positive supply voltage |
| Chân 32 | RD0 — Port D bit 0 |
| Chân 33 | RD1 — Port D bit 1 |
| Chân 34 | RD2 — Port D bit 2 |
| Chân 35 | RD3 — Port D bit 3 |
| Chân 36 | RD4 — Port D bit 4 |
| Chân 37 | RD5 — Port D bit 5 |
| Chân 38 | RD6 — Port D bit 6 |
| Chân 39 | RD7 — Port D bit 7 |
| Chân 40 | RE0/AN12 — Port E bit 0 / ADC input 12 |
| Chân 41 | RE1/AN13 — Port E bit 1 / ADC input 13 |
| Chân 42 | RE2/AN14 — Port E bit 2 / ADC input 14 |
| Chân 43 | RE3/AN15 — Port E bit 3 / ADC input 15 |
| Chân 44 | VSS — Ground |
| Chân 45 | VDD — Positive supply voltage |
| Chân 46 | RF0 — Port F bit 0 |
| Chân 47 | RF1 — Port F bit 1 |
| Chân 48 | RF2 — Port F bit 2 |
| Chân 49 | RF3 — Port F bit 3 |
| Chân 50 | RF4 — Port F bit 4 |
| Chân 51 | RF5 — Port F bit 5 |
| Chân 52 | RF6 — Port F bit 6 |
| Chân 53 | RF7 — Port F bit 7 |
| 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 | AVSS — Analog ground |
| Chân 60 | AVDD — Analog positive supply |
| Chân 61 | VREF- — ADC negative reference |
| Chân 62 | VREF+ — ADC positive reference |
| Chân 63 | NC — Not connected (per datasheet) |
| Chân 64 | NC — Not connected (per datasheet) |
| Chân 65 | T1CKI/RC0 — Timer 1 clock input |
| Chân 66 | CCP1 — Capture/Compare/PWM output 1 |
| Chân 67 | SCK/SCL — SSP clock (SPI/I2C) |
| Chân 68 | SDI/SDA — SSP data input (SPI/I2C) |
| Chân 69 | SDO — SSP data output (SPI) |
| Chân 70 | SS — SSP slave select |
| Chân 71 | VSS — Ground |
| Chân 72 | VDD — Positive supply voltage |
| Chân 73 | NC — Not connected (per datasheet) |
| Chân 74 | NC — Not connected (per datasheet) |
| Chân 75 | NC — Not connected (per datasheet) |
| Chân 76 | NC — Not connected (per datasheet) |
| Chân 77 | NC — Not connected (per datasheet) |
| Chân 78 | NC — Not connected (per datasheet) |
| Chân 79 | NC — Not connected (per datasheet) |
| Chân 80 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC17LC762-08I/PT phù hợp cho 6 Áp dụngs: Industrial Process Control, Motor Control Front-End, Instrumentation and Data Acquisition, Human-Machine Interface (HMI) Panels, Automotive Body Electronics (Non-Safety), Sensor Interface Boards.
Industrial Process Control
The PIC17LC762-08I/PT fits industrial process-control boards because of its 66 I/O pins (sufficient for 32-key keypads plus 7-segment or LCD displays), 10-bit ADC with 12 channels (good for 4-20 mA loop transmitters and bridge sensors), and 2.5-5.5 V operation. Industrial PLCs and remote terminal units (RTUs) benefit from the 33 MHz performance and the USART supporting RS-485 multidrop networks. Watchdog timer and brown-out reset provide the fail-safe behavior required by IEC 61131-2 industrial environments.
Được đề xuất
Motor Control Front-End
Motor-control pre-drive boards use the PIC17LC762-08I/PT for sensor feedback and PWM generation because the 10-bit ADC samples current shunt amplifiers fast enough for 10 kHz control loops and the 16-bit timer drives the PWM base frequency. At 33 MHz the 121 ns instruction cycle supports field-oriented-control inner loops. The Capture/Compare/PWM (CCP) module generates complementary PWM outputs for three-phase inverter drivers, while 66 I/O accommodate Hall-effect sensors and fault inputs.
Được đề xuất
Instrumentation and Data Acquisition
Bench-top instruments and data loggers use the PIC17LC762-08I/PT because its 12-channel 10-bit ADC multiplexes multiple thermocouple, RTD, or strain-gauge inputs, while 678 bytes of RAM buffers 250 samples at 12-bit equivalent oversampling rates. The USART streams data to a host PC at 115.2 kbps, and the I2C/SPI bus connects to external EEPROM for non-volatile storage. The -40C to +85C industrial temperature range supports outdoor environmental monitoring.
Được đề xuất
Human-Machine Interface (HMI) Panels
Operator-interface panels with 4x4 to 8x8 keypad matrices and character or graphical LCDs benefit from the PIC17LC762's 66 I/O count, which can scan a 64-key matrix and drive a 40x4 character LCD with backlight control without external multiplexer ICs. The 16 KB OTP holds state-machine firmware for menu navigation, and the USART links to a host controller for parameter upload/download. The 80-pin TQFP gives clean PCB routing for the many parallel bus signals required by LCD modules.
Được đề xuất
Automotive Body Electronics (Non-Safety)
Body-control modules (window lifters, mirror adjusters, seat controllers) historically used the PIC17LC762-08I/PT because its 66 I/O drive multiple relay and motor bridges directly through MOSFET pre-drivers. The wide 2.5-5.5 V supply tolerates 12 V automotive bus drops after pre-regulation. NOTE: this part is NOT AEC-Q100 qualified, so it is only suitable for non-safety body electronics; safety-critical ECUs require AEC-Q100 parts like dsPIC33EV variants.
Được đề xuất
Sensor Interface Boards
Multi-sensor interface boards for HVAC, building automation, and environmental monitoring use the PIC17LC762-08I/PT because its 12 ADC inputs handle multiple analog sensors (temperature, humidity, pressure, light) simultaneously, while 66 digital I/O accommodate I2C/SPI sensor buses and digital switch inputs. The 2.5 V minimum supply supports battery-backed designs with 3.6 V lithium cells. Industrial temperature rating and watchdog timer ensure robust unattended operation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17LC762-08I/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 | PIC17LC762-08I/L | PIC17LC756A-08I/PT | PIC17LC752T-08I/PT | PIC17C762-16I/PT | PIC17C762-16/PT | PIC17LC756AT-08I/L |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-80 (PT) | PLCC-68 (L) - different package | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | PLCC-68 (L) - different package |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB OTP | 8 KB OTP (-50%) | 16 KB OTP | 16 KB OTP | 16 KB OTP |
| RAM Size | 678 bytes | 678 bytes | 678 bytes | 678 bytes | 678 bytes | 678 bytes | 678 bytes |
| I/O Pins | 66 | 50 (-24%) | 66 | 50 (-24%) | 66 | 66 | 50 (-24%) |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 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 |
| Max Clock Frequency | 33 MHz | 33 MHz | 33 MHz | 33 MHz | 33 MHz | 33 MHz | 33 MHz |
| Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | 0C to +70C (Commercial) | -40C to +85C |
Bảo phân biệt quan trọng
- Lower minimum supply voltage (vsPIC17C762-16I/PT)
- Industrial temperature grade vs commercial (vsPIC17C762-16/PT)
- Maximum program memory in the family (vsPIC17LC752T-08I/PT)
Ghi chú thiết kế
The PIC17LC762 requires a stable 2.5 V to 5.5 V supply on VDD with separate AVDD for the ADC. Place a 10 uF bulk capacitor and 0.1 uF decoupling capacitor as close as possible to each VDD/VSS pin pair. The PIC17's internal brown-out reset triggers at approximately 2.0 V; designs operating near the 2.5 V minimum should add external reset supervisor ICs (e.g., MCP100) for production margin because OTP programming requires a stable 5 V rail.
The 80-pin TQFP package uses 0.5 mm pitch pads requiring PCB trace widths of 0.2 mm (8 mil) or smaller. Use a 4-layer PCB with a continuous ground plane on layer 2 directly below the device to reduce EMI and provide thermal dissipation. Route the crystal traces (OSC1/OSC2) within 5 mm of the package with guard ground traces on both sides; long crystal traces pick up noise that corrupts the instruction cycle timing.
OTP (One-Time Programmable) memory cannot be erased or rewritten; once programmed, the PIC17LC762 cannot be reused. For prototype development, use the windowed PIC17C762/JW ceramic package (UV-erasable) or migrate to the flash-based PIC18F8722-I/PT. Programming the OTP requires a precise VPP voltage of 13.0 V to 13.25 V with a rise time under 1 ms - using a 12 V VPP will fail verification even if the device appears to program.
Keep ADC analog traces (AN0-AN15, VREF+, VREF-) away from digital switching signals and the USART lines. AVDD should be filtered with a ferrite bead from VDD, and AVSS should connect directly to the ground plane with a single via to avoid ground loops. The ADC's 10-bit accuracy is degraded by 1 LSB for every 50 mV of digital switching noise on the analog supply; this layout discipline is essential for instrumentation applications.
Thông tin tuân thủ
RoHS compliant per Microchip product page; NOT AEC-Q100 qualified - use dsPIC33EV variants for automotive. Halogen-free status not stated in verified data.