PIC17LC762-08I/PT - 8-Bit 16KB EPROM MCU, 66 I/O | Microchip
MPN: PIC17LC762-08I/PT ✗ انتهى عمره الإنتاجيPIC17LC762-08I/PT نظرة عامة
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.
بدائل مباشرة لـ PIC17LC762-08I/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 PIC17LC762-08I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Core Architecture, Program Memory Type, Program Memory Size, Instruction Cycle Time.
PIC17LC762-08I/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC756A-08I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC752T-08I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C762-16I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17C762-16/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC756AT-08I/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC762-08I/PT الحدود القصوى والخصائص الكهربائية
| 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 |
| أقصى تردد للساعة | 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) |
| العلبة | TQFP-80 (PT), 12x12 mm |
| درجة حرارة التشغيل | -40C to +85C (Industrial) |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
تكوين أطراف PIC17LC762-08I/PT
| دبوس 1 | OSC1 — Crystal oscillator input |
| دبوس 2 | OSC2 — Crystal oscillator output |
| دبوس 3 | MCLR — Master clear reset (active low) |
| دبوس 4 | RA0/AN0 — Port A bit 0 / ADC input 0 |
| دبوس 5 | RA1/AN1 — Port A bit 1 / ADC input 1 |
| دبوس 6 | RA2/AN2 — Port A bit 2 / ADC input 2 |
| دبوس 7 | RA3/AN3 — Port A bit 3 / ADC input 3 |
| دبوس 8 | RA4/AN4/T0CKI — Port A bit 4 / ADC input 4 / Timer 0 clock |
| دبوس 9 | RA5/AN5 — Port A bit 5 / ADC input 5 |
| دبوس 10 | RA6/AN6 — Port A bit 6 / ADC input 6 |
| دبوس 11 | RA7/AN7 — Port A bit 7 / ADC input 7 |
| دبوس 12 | VSS — Ground |
| دبوس 13 | VDD — Positive supply voltage |
| دبوس 14 | RB0/INT — Port B bit 0 / External interrupt |
| دبوس 15 | RB1/AN8 — Port B bit 1 / ADC input 8 |
| دبوس 16 | RB2/AN9 — Port B bit 2 / ADC input 9 |
| دبوس 17 | RB3/AN10 — Port B bit 3 / ADC input 10 |
| دبوس 18 | RB4/AN11 — Port B bit 4 / ADC input 11 |
| دبوس 19 | RB5 — Port B bit 5 |
| دبوس 20 | RB6 — Port B bit 6 |
| دبوس 21 | RB7 — Port B bit 7 |
| دبوس 22 | RC0 — Port C bit 0 |
| دبوس 23 | RC1 — Port C bit 1 |
| دبوس 24 | RC2 — Port C bit 2 |
| دبوس 25 | RC3 — Port C bit 3 |
| دبوس 26 | RC4 — Port C bit 4 |
| دبوس 27 | RC5 — Port C bit 5 |
| دبوس 28 | RC6/TX/CK — Port C bit 6 / USART TX |
| دبوس 29 | RC7/RX/DT — Port C bit 7 / USART RX |
| دبوس 30 | VSS — Ground |
| دبوس 31 | VDD — Positive supply voltage |
| دبوس 32 | RD0 — Port D bit 0 |
| دبوس 33 | RD1 — Port D bit 1 |
| دبوس 34 | RD2 — Port D bit 2 |
| دبوس 35 | RD3 — Port D bit 3 |
| دبوس 36 | RD4 — Port D bit 4 |
| دبوس 37 | RD5 — Port D bit 5 |
| دبوس 38 | RD6 — Port D bit 6 |
| دبوس 39 | RD7 — Port D bit 7 |
| دبوس 40 | RE0/AN12 — Port E bit 0 / ADC input 12 |
| دبوس 41 | RE1/AN13 — Port E bit 1 / ADC input 13 |
| دبوس 42 | RE2/AN14 — Port E bit 2 / ADC input 14 |
| دبوس 43 | RE3/AN15 — Port E bit 3 / ADC input 15 |
| دبوس 44 | VSS — Ground |
| دبوس 45 | VDD — Positive supply voltage |
| دبوس 46 | RF0 — Port F bit 0 |
| دبوس 47 | RF1 — Port F bit 1 |
| دبوس 48 | RF2 — Port F bit 2 |
| دبوس 49 | RF3 — Port F bit 3 |
| دبوس 50 | RF4 — Port F bit 4 |
| دبوس 51 | RF5 — Port F bit 5 |
| دبوس 52 | RF6 — Port F bit 6 |
| دبوس 53 | RF7 — Port F bit 7 |
| دبوس 54 | RG0 — Port G bit 0 |
| دبوس 55 | RG1 — Port G bit 1 |
| دبوس 56 | RG2 — Port G bit 2 |
| دبوس 57 | RG3 — Port G bit 3 |
| دبوس 58 | RG4 — Port G bit 4 |
| دبوس 59 | AVSS — Analog ground |
| دبوس 60 | AVDD — Analog positive supply |
| دبوس 61 | VREF- — ADC negative reference |
| دبوس 62 | VREF+ — ADC positive reference |
| دبوس 63 | NC — Not connected (per datasheet) |
| دبوس 64 | NC — Not connected (per datasheet) |
| دبوس 65 | T1CKI/RC0 — Timer 1 clock input |
| دبوس 66 | CCP1 — Capture/Compare/PWM output 1 |
| دبوس 67 | SCK/SCL — SSP clock (SPI/I2C) |
| دبوس 68 | SDI/SDA — SSP data input (SPI/I2C) |
| دبوس 69 | SDO — SSP data output (SPI) |
| دبوس 70 | SS — SSP slave select |
| دبوس 71 | VSS — Ground |
| دبوس 72 | VDD — Positive supply voltage |
| دبوس 73 | NC — Not connected (per datasheet) |
| دبوس 74 | NC — Not connected (per datasheet) |
| دبوس 75 | NC — Not connected (per datasheet) |
| دبوس 76 | NC — Not connected (per datasheet) |
| دبوس 77 | NC — Not connected (per datasheet) |
| دبوس 78 | NC — Not connected (per datasheet) |
| دبوس 79 | NC — Not connected (per datasheet) |
| دبوس 80 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
PIC17LC762-08I/PT مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC17LC762-08I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- Lower minimum supply voltage (مقابلPIC17C762-16I/PT)
- Industrial temperature grade vs commercial (مقابلPIC17C762-16/PT)
- Maximum program memory in the family (مقابلPIC17LC752T-08I/PT)
ملاحظات التصميم
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.
معلومات الامتثال
RoHS compliant per Microchip product page; NOT AEC-Q100 qualified - use dsPIC33EV variants for automotive. Halogen-free status not stated in verified data.