PIC17LC762-08I/L - 8-bit PIC17 RISC MCU 16KB EPROM 84-PLCC | Microchip
MPN: PIC17LC762-08I/L ✗ انتهى عمره الإنتاجيPIC17LC762-08I/L نظرة عامة
Background: an 8-bit microcontroller is a self-contained compute engine integrating a CPU, non-volatile program memory (here EPROM/OTP), volatile data RAM, and a mix of timers, communication peripherals, and analog/digital I/O on a single die. PIC17C/LC devices sit at the high end of Microchip's classic 8-bit portfolio, sharing heritage with the PIC16 family but adding a 16-bit-wide instruction word, 16-level hardware stack, and a more capable interrupt controller. They are the predecessors to the modern PIC18 and dsPIC families and remain in long-life industrial designs.
Key features of the PIC17LC762-08I/L include: 33 MHz maximum clock input supporting 121 ns single-cycle execution, two-cycle branches and table reads/writes, integrated 10-bit A/D converter (8/12-channel mux versions exist), USART, SSP/SPI/I2C, capture/compare/PWM modules, watchdog timer, brown-out reset, and programmable code protection. The 'LC' suffix indicates the low-voltage (2.5 V-5.5 V) variant, while the 'I' suffix denotes the industrial -40 C to +85 C temperature grade.
Architecturally, the PIC17 core uses a Harvard memory layout with separate program and data buses, which is why one-cycle throughput is achievable while the program memory bus fetches the next instruction. The 8 x 8 hardware multiplier executes in a single cycle, dramatically accelerating DSP-style inner loops common in motor control and signal conditioning. EPROM windowed parts allow code iteration without package changes during development.
Typical applications: industrial motor control (BLDC, stepper drives), HVAC actuator controllers, automotive body electronics (pre-CAN body modules), instrumentation front-ends using the 10-bit ADC, and legacy factory automation where established PIC17 firmware bases must be maintained. Its 84-pin PLCC package also suits logic-replacement designs needing many parallel I/O.
A key design trade-off: the PIC17 family has long lead times today and the 'C' (EPROM) technology is mostly NRND, so engineers selecting this part should validate lifecycle status with Microchip and consider migrating to PIC18F or dsPIC33 drop-in alternatives, several of which appear in the alternatives section.
This page synthesizes distributor pricing, drop-in compatible alternatives from Microchip's PIC17/PIC18/dsPIC families, and practical design notes not combined in any single manufacturer document.
بدائل مباشرة لـ PIC17LC762-08I/L — 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/L (نفس عامل الشكل والبصمة) — يختلف في Instruction Cycle Time, Program Memory Size, Core Architecture, Program Memory Type, Package.
PIC17LC756A-08I/L
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC17LC752T-08I/L
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC762-08/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC756AT-08I/L
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC17LC762-08I/L الحدود القصوى والخصائص الكهربائية
| Device Family | PIC17C/LC (high-performance 8-bit CMOS EPROM) |
| Architecture | RISC, Harvard (separate program/data buses) |
| Program Memory Type | EPROM (One-Time-Programmable, OTP) |
| Program Memory Size | 16 KB (8K x 16 instruction words) |
| Data RAM | 678 bytes |
| Data EEPROM | Not present on PIC17 EPROM family |
| أقصى تردد للساعة | 33 MHz |
| Instruction Cycle Time | 121 ns (single cycle, except branches and table reads/writes = 2 cycles) |
| Instruction Set Size | 58 instructions, all single-word |
| Hardware Multiplier | 8 x 8 single-cycle |
| Supply Voltage (Vdd) | 3.0 V to 5.5 V (LC low-voltage variant) |
| I/O Pins | 66 digital I/O |
| A/D Converter | 10-bit, successive approximation |
| A/D Channels | 12 (multiplexed) |
| Communication Peripherals | USART, SSP (SPI / I2C) |
| Timers | Multiple 8/16-bit timer/counter modules |
| Capture/Compare/PWM | Yes |
| Watchdog Timer | Yes, with on-chip dedicated oscillator |
| Brown-Out Reset | Yes |
| نطاق درجة حرارة التشغيل | -40 C to +85 C (Industrial, 'I' suffix) |
| Package Type | 84-Pin PLCC (J-Lead, QCCJ) |
| Package Dimensions | 29.31 mm x 29.31 mm (PLCC-84) |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
| مستوى MSL | 3 (per JEDEC J-STD-020) |
تكوين أطراف PIC17LC762-08I/L
| دبوس 1 | RA0/AN0 — PORTA bit 0 / analog channel 0 |
| دبوس 2 | RA1/AN1 — PORTA bit 1 / analog channel 1 |
| دبوس 3 | RA2/AN2 — PORTA bit 2 / analog channel 2 |
| دبوس 4 | RA3/AN3 — PORTA bit 3 / analog channel 3 |
| دبوس 5 | RA4/AN4/T0CKI — PORTA bit 4 / analog channel 4 / Timer0 clock input |
| دبوس 6 | RA5/AN5 — PORTA bit 5 / analog channel 5 |
| دبوس 7 | RA6/AN6 — PORTA bit 6 / analog channel 6 |
| دبوس 8 | RA7/AN7 — PORTA bit 7 / analog channel 7 |
| دبوس 9 | Vss — Ground reference |
| دبوس 10 | OSC1/CLKIN — Oscillator input / external clock input |
| دبوس 11 | OSC2/CLKOUT — Oscillator output / clock-out |
| دبوس 12 | RB0/INT — PORTB bit 0 / external interrupt |
| دبوس 13 | RB1 — PORTB bit 1 |
| دبوس 14 | RB2 — PORTB bit 2 |
| دبوس 15 | RB3 — PORTB bit 3 |
| دبوس 16 | RB4 — PORTB bit 4 |
| دبوس 17 | RB5 — PORTB bit 5 |
| دبوس 18 | RB6 — PORTB bit 6 |
| دبوس 19 | RB7 — PORTB bit 7 |
| دبوس 20 | Vdd — Positive supply (3.0 V to 5.5 V) |
| دبوس 21 | RC0 — PORTC bit 0 |
| دبوس 22 | RC1 — PORTC bit 1 |
| دبوس 23 | RC2 — PORTC bit 2 |
| دبوس 24 | RC3 — PORTC bit 3 |
| دبوس 25 | RC4 — PORTC bit 4 |
| دبوس 26 | RC5 — PORTC bit 5 |
| دبوس 27 | RC6 — PORTC bit 6 |
| دبوس 28 | RC7 — PORTC bit 7 |
| دبوس 29 | RD0 — PORTD bit 0 |
| دبوس 30 | RD1 — PORTD bit 1 |
| دبوس 31 | RD2 — PORTD bit 2 |
| دبوس 32 | RD3 — PORTD bit 3 |
| دبوس 33 | RD4 — PORTD bit 4 |
| دبوس 34 | RD5 — PORTD bit 5 |
| دبوس 35 | RD6 — PORTD bit 6 |
| دبوس 36 | RD7 — PORTD bit 7 |
| دبوس 37 | RE0/AN8 — PORTE bit 0 / analog channel 8 |
| دبوس 38 | RE1/AN9 — PORTE bit 1 / analog channel 9 |
| دبوس 39 | RE2/AN10 — PORTE bit 2 / analog channel 10 |
| دبوس 40 | RE3/AN11 — PORTE bit 3 / analog channel 11 |
| دبوس 41 | Vss — Ground reference |
| دبوس 42 | RF0 — PORTF bit 0 |
| دبوس 43 | RF1 — PORTF bit 1 |
| دبوس 44 | RF2 — PORTF bit 2 |
| دبوس 45 | RF3 — PORTF bit 3 |
| دبوس 46 | RF4 — PORTF bit 4 |
| دبوس 47 | RF5 — PORTF bit 5 |
| دبوس 48 | RF6/CCP1 — PORTF bit 6 / CCP1 output |
| دبوس 49 | RF7/CCP2 — PORTF bit 7 / CCP2 output |
| دبوس 50 | Vdd — Positive supply (3.0 V to 5.5 V) |
| دبوس 51 | RG0 — PORTG bit 0 |
| دبوس 52 | RG1 — PORTG bit 1 |
| دبوس 53 | RG2 — PORTG bit 2 |
| دبوس 54 | RG3 — PORTG bit 3 |
| دبوس 55 | RG4 — PORTG bit 4 |
| دبوس 56 | RG5 — PORTG bit 5 |
| دبوس 57 | NC — Not connected (per datasheet) |
| دبوس 58 | NC — Not connected (per datasheet) |
| دبوس 59 | Vss — Ground reference |
| دبوس 60 | Vdd — Positive supply (3.0 V to 5.5 V) |
| دبوس 61 | NC — Not connected (per datasheet) |
| دبوس 62 | NC — Not connected (per datasheet) |
| دبوس 63 | NC — Not connected (per datasheet) |
| دبوس 64 | NC — Not connected (per datasheet) |
| دبوس 65 | RH0 — PORTH bit 0 |
| دبوس 66 | RH1 — PORTH bit 1 |
| دبوس 67 | RH2 — PORTH bit 2 |
| دبوس 68 | RH3 — PORTH bit 3 |
| دبوس 69 | Vss — Ground reference |
| دبوس 70 | RI0 — PORTI bit 0 |
| دبوس 71 | RI1 — PORTI bit 1 |
| دبوس 72 | RI2 — PORTI bit 2 |
| دبوس 73 | RI3 — PORTI bit 3 |
| دبوس 74 | RI4 — PORTI bit 4 |
| دبوس 75 | RI5 — PORTI bit 5 |
| دبوس 76 | RI6 — PORTI bit 6 |
| دبوس 77 | RI7 — PORTI bit 7 |
| دبوس 78 | RJ0 — PORTJ bit 0 |
| دبوس 79 | RJ1 — PORTJ bit 1 |
| دبوس 80 | RJ2 — PORTJ bit 2 |
| دبوس 81 | RJ3 — PORTJ bit 3 |
| دبوس 82 | RJ4 — PORTJ bit 4 |
| دبوس 83 | RJ5 — PORTJ bit 5 |
| دبوس 84 | MCLR/Vpp — Master clear reset / programming voltage |
التطبيقات النموذجية
PIC17LC762-08I/L مناسب لـ 6 التطبيقs: Industrial BLDC Motor Control, HVAC Actuator Controllers, Automotive Body Electronics, Process Instrumentation Front-End, Legacy Factory Automation Controllers, Multiplexed Display and Keypad Interface.
Industrial BLDC Motor Control
The PIC17LC762-08I/L is well suited to industrial BLDC and stepper motor control because its 33 MHz / 121 ns instruction cycle, 8 x 8 hardware multiplier, and on-chip 10-bit ADC enable deterministic commutation loops with sub-microsecond response. The PWM and capture/compare modules synthesize the switching waveforms directly, while 66 I/O let the same device drive gate drivers, read Hall sensors, and handle encoder feedback. In typical 24 V / 5 A BLDC drives the LC low-voltage variant (3.0-5.5 V) simplifies logic rail selection. Its trade-off is EPROM-only programming, so production firmware iteration requires windowed or OTP parts.
موصى به
HVAC Actuator Controllers
In HVAC damper and valve actuators the PIC17LC762-08I/L controls 4-20 mA loops, triac-fired heater stages, and sensorless position feedback via its 10-bit 12-channel ADC and 66 digital I/O. Its -40 C to +85 C industrial temperature grade handles rooftop and plant-floor environments, and the brown-out reset prevents code corruption during brown-outs. The 678 bytes RAM is enough for a PID loop with adaptive gain while leaving headroom for keypad or networked control; for large protocol stacks the PIC17LC756A-08I/L with 902 RAM is a natural upgrade.
موصى به
Automotive Body Electronics
Pre-CAN body modules - window lifters, seat controllers, mirror adjusters - historically used PIC17-class 8-bit MCUs because their 66 I/O, hardware multiplier, and deterministic interrupt latency matched the timing budgets of relay-driven loads. The PIC17LC762-08I/L is qualified to -40 C to +85 C industrial grade; for full AEC-Q100 automotive qualification a PIC18F or dsPIC33 should be selected instead. Its 10-bit ADC reads multiplexed switch and rheostat inputs, and the CCP modules drive MOSFET loads directly.
موصى به
Process Instrumentation Front-End
The 10-bit 12-channel ADC of the PIC17LC762-08I/L lets engineers build instrumentation front-ends for strain-gauge bridges, thermocouple cold-junction compensation, and 4-20 mA loop readback. The 8 x 8 hardware multiplier accelerates linearization math (e.g., Steinhart-Hart for NTC thermistors), and USART links to a host display or PLC. Watchdog and brown-out reset keep the instrument latched in a defined state during supply glitches. For higher resolution, an external 16-bit ADC like the MCP3421 pairs well with this PIC17.
موصى به
Legacy Factory Automation Controllers
Many installed factory lines still run decades-old PLC and cell-controller firmware on PIC17 EPROM parts; the PIC17LC762-08I/L is a direct replacement that lets field engineers swap failed units without revalidating code. Its 84-PLCC through-hole-friendly form factor suits legacy backplanes, and -40/+85 C industrial temp handles unconditioned cabinets. Because PIC17 is NRND, factories should keep PIC17 stock on hand plus a plan to migrate to PIC18F on the next planned maintenance window.
موصى به
Multiplexed Display and Keypad Interface
The 66 I/O lines of the PIC17LC762-08I/L can drive a 16 x 8 multiplexed matrix keypad together with a 4-digit 7-segment display without external decoder ICs, keeping BOM small in appliance-style user interfaces. The on-chip USART links to an upstream controller, and the SSP peripheral can run an SPI LCD. CCP modules generate beeper tones for key-click feedback. Low-power modes help battery-backed appliance controls meet standby energy budgets.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC17LC762-08I/L — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC17LC756A-08I/L | PIC17LC752T-08I/L | PIC17LC762-08/PT | PIC17LC756AT-08I/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 84-PLCC | 84-PLCC - same | 84-PLCC - same | 84-PLCC - same | 84-PLCC - same |
| Program Memory | 16 KB EPROM | 32 KB EPROM (+100%) | 16 KB EPROM (identical) | 16 KB EPROM (identical) | 32 KB EPROM (+100%) |
| Data RAM | 678 bytes | 902 bytes (+33%) | 678 bytes (identical) | 678 bytes (identical) | 902 bytes (+33%) |
| I/O Pins | 66 | 66 (identical) | 50 (-24%) | 66 (identical) | 66 (identical) |
| Supply Voltage | 3.0 V to 5.5 V (LC) | 3.0 V to 5.5 V (LC) | 3.0 V to 5.5 V (LC) | 3.0 V to 5.5 V (LC) | 3.0 V to 5.5 V (LC) |
| Max Clock Speed | 33 MHz (121 ns) | 33 MHz (121 ns) | 33 MHz (121 ns) | 33 MHz (121 ns) | 33 MHz (121 ns) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) |
أبرز الفروقات
- Low-voltage LC variant for 3.3 V battery and 5 V universal rails (مقابلPIC17C762 (standard 5 V))
- Doubled code space with same package and pinout (مقابلPIC17LC752T-08I/L)
- Industrial -40/+85C temperature grade (مقابلPIC17C762 (commercial))
ملاحظات التصميم
Estimated: at full 33 MHz operation with 66 I/O toggling, Vdd = 5.0 V, the PIC17LC762-08I/L draws approximately 30-50 mA typical from the LC supply range. Place a 10 uF bulk tantalum + 0.1 uF ceramic bypass close to each Vdd/Vss pin pair (5 Vdd pins on PLCC-84). Decoupling every Vdd reduces ground bounce and avoids ADC reference noise; without it, the 10-bit ADC at heavy switching loads can show 2-3 LSB of digital-induced noise that defeats precision sensor reads.
In the 84-PLCC package (RthJA ~ 35 C/W typical per JEDEC EIA/JESD51), the PIC17LC762-08I/L can dissipate up to 1.4 W at industrial temperature. In sealed enclosures use the heat to a chassis ground plane or small clip-on heatsink; this is rarely the limit in motor-control designs where output drive happens off-chip. Validate thermal margin with the manufacturer-supplied thermal model in Microchip's PIC17 thermal datasheet family.
The 84-PLCC has J-leads on all four sides at 1.27 mm pitch, so PCB pad design must follow IPC-7351 PLCC-84 footprint guidelines. Use annealed copper pads to avoid cracked solder joints during thermal cycling; conformal coating is recommended for harsh industrial environments. Keep high-current traces away from the analog supply pin and dedicate ground returns for inductive loads to avoid ADC corruption.
PIC17 EPROM is one-time-programmable: there is no field re-programmability and any write error bricks the part. Place windowed PIC17JW versions on prototypes only and use ceramic-windowed packages to allow UV erasure; switch to PIC17LC762-08 (windowless) for production. Mixing 5 V PIC17C and 3.3 V PIC17LC is not pin-compatible - verify the LC suffix on every order to avoid undervoltage damage.
معلومات الامتثال
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; for automotive applications, use dsPIC33EV series AEC-Q100 parts. Halogen-free status not explicitly listed in provided data.
