PIC17LC756AT-08/PT - 8-bit 8MHz 32KB OTP MCU TQFP-64 | Microchip
MPN: PIC17LC756AT-08/PT ✗ Cuối đờiPIC17LC756AT-08/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces. It belongs to the broader category of embedded processors -> microcontrollers -> 8-bit microcontrollers, and serves as the central control element in countless embedded systems where deterministic, low-power control is more important than raw compute throughput. The PIC17C family specifically targets high-performance 8-bit applications that exceed the capability of baseline PIC16 devices while retaining the simple RISC instruction set.
Key differentiating features include the 16-bit-wide instruction word (vs. 14-bit on PIC16), which permits richer addressing modes and larger immediate operands, a hardware multiply option, and dual-cycle branch execution that gives 8 MHz clocking an effective throughput comparable to many 16 MHz PIC16 designs. The OTP memory enables fast prototype-to-production transition, while the wide VCC tolerance (2.5 V to 5.5 V) supports both 3.3 V and 5 V system rails.
Typical applications for the PIC17LC756AT-08/PT include industrial control panels, motor-drive front-end controllers, automotive body electronics, white-goods user interfaces, and legacy embedded products that were originally designed around the PIC17C architecture. The 64-pin TQFP package offers generous I/O and peripheral count for mid-complexity designs.
A key design consideration is the OTP memory nature: firmware must be fully validated before programming because the device cannot be erased. Engineers migrating to flash-based PIC18 or dsPIC33 families should evaluate whether legacy code constraints justify retention of this OTP PIC17C part, or whether a modern flash MCU is more appropriate.
This page synthesizes distributor pricing, verified cross-reference data, and practical design guidance not aggregated on the manufacturer datasheet, helping engineers and procurement teams evaluate the PIC17LC756AT-08/PT for both new designs and legacy board replacements.
Bộ thay thế dễ dàng lắp đặt cho PIC17LC756AT-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 PIC17LC756AT-08/PT (cùng hình factor và footprint) — khác nhau ở Core Architecture, Data Bus Width, I/O Pins, Package, Program Memory Type.
PIC17LC756A-08/PT
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Xem tài liệu →PIC17C756A-16/PT
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Xem tài liệu →PIC17C756A-33E/PT
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Xem tài liệu →PIC17LC756AT-08/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC |
| Family | PIC17C |
| CPU Bit Width | 8-bit (16-bit instruction word) |
| Tần số xung maksimum | 8 MHz |
| Instruction Cycle Time | 121 ns (single cycle, except branches and table reads/writes) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 32 KB (16K x 16) |
| Bề rộng đường dữ liệu | 16-bit |
| RAM Size | 902 bytes |
| I/O Pins | 33 |
| Supply Voltage (VCC) | 2.5 V to 5.5 V |
| Communication Interfaces | I2C, SPI, UART/USART |
| Instruction Set Size | 58 single-word instructions |
| Hộp | 64-pin TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Lead free / RoHS Compliant |
Cấu hình chân PIC17LC756AT-08/PT
| Chân 1 | OSC1 — Crystal/oscillator input |
| Chân 2 | OSC2 — Crystal/oscillator output |
| Chân 3 | MCLR — Master clear reset (active low) |
| Chân 4 | RA0 — Port A bit 0 (digital I/O) |
| Chân 5 | RA1 — Port A bit 1 (digital I/O) |
| Chân 6 | RA2 — Port A bit 2 (digital I/O) |
| Chân 7 | RA3 — Port A bit 3 (digital I/O) |
| Chân 8 | RA4 — Port A bit 4 (digital I/O) |
| Chân 9 | RA5 — Port A bit 5 (digital I/O) |
| Chân 10 | VSS — Ground |
| Chân 11 | VDD — Positive supply voltage |
| Chân 12 | RB0 — Port B bit 0 (digital I/O / external interrupt) |
| Chân 13 | RB1 — Port B bit 1 (digital I/O) |
| Chân 14 | RB2 — Port B bit 2 (digital I/O) |
| Chân 15 | RB3 — Port B bit 3 (digital I/O) |
| Chân 16 | RB4 — Port B bit 4 (digital I/O) |
| Chân 17 | RB5 — Port B bit 5 (digital I/O) |
| Chân 18 | RB6 — Port B bit 6 (digital I/O / programming clock) |
| Chân 19 | RB7 — Port B bit 7 (digital I/O / programming data) |
| Chân 20 | VSS — Ground |
| Chân 21 | VDD — Positive supply voltage |
| Chân 22 | RC0 — Port C bit 0 (digital I/O) |
| Chân 23 | RC1 — Port C bit 1 (digital I/O) |
| Chân 24 | RC2 — Port C bit 2 (digital I/O) |
| Chân 25 | RC3 — Port C bit 3 (digital I/O) |
| Chân 26 | RC4 — Port C bit 4 (digital I/O) |
| Chân 27 | RC5 — Port C bit 5 (digital I/O) |
| Chân 28 | RC6 — Port C bit 6 (digital I/O / TX) |
| Chân 29 | RC7 — Port C bit 7 (digital I/O / RX) |
| Chân 30 | RD0 — Port D bit 0 (digital I/O) |
| Chân 31 | RD1 — Port D bit 1 (digital I/O) |
| Chân 32 | RD2 — Port D bit 2 (digital I/O) |
| Chân 33 | RD3 — Port D bit 3 (digital I/O) |
| Chân 34 | RD4 — Port D bit 4 (digital I/O) |
| Chân 35 | RD5 — Port D bit 5 (digital I/O) |
| Chân 36 | RD6 — Port D bit 6 (digital I/O) |
| Chân 37 | RD7 — Port D bit 7 (digital I/O) |
| Chân 38 | VSS — Ground |
| Chân 39 | VDD — Positive supply voltage |
| Chân 40 | RE0 — Port E bit 0 (digital I/O) |
| Chân 41 | RE1 — Port E bit 1 (digital I/O) |
| Chân 42 | RE2 — Port E bit 2 (digital I/O) |
| Chân 43 | RE3 — Port E bit 3 (digital I/O) |
| Chân 44 | RE4 — Port E bit 4 (digital I/O) |
| Chân 45 | RE5 — Port E bit 5 (digital I/O) |
| Chân 46 | RE6 — Port E bit 6 (digital I/O) |
| Chân 47 | RE7 — Port E bit 7 (digital I/O) |
| Chân 48 | VSS — Ground |
| Chân 49 | VDD — Positive supply voltage |
| Chân 50 | RF0 — Port F bit 0 (digital I/O) |
| Chân 51 | RF1 — Port F bit 1 (digital I/O) |
| Chân 52 | RF2 — Port F bit 2 (digital I/O) |
| Chân 53 | RF3 — Port F bit 3 (digital I/O) |
| Chân 54 | RF4 — Port F bit 4 (digital I/O) |
| Chân 55 | RF5 — Port F bit 5 (digital I/O) |
| Chân 56 | RF6 — Port F bit 6 (digital I/O) |
| Chân 57 | RF7 — Port F bit 7 (digital I/O) |
| Chân 58 | SDA — I2C serial data |
| Chân 59 | SCL — I2C serial clock |
| Chân 60 | SDO — SPI serial data out |
| Chân 61 | SDI — SPI serial data in |
| Chân 62 | SCK — SPI serial clock |
| Chân 63 | TX — UART transmit |
| Chân 64 | RX — UART receive |
Ứng dụng tiêu biểu
PIC17LC756AT-08/PT phù hợp cho 6 Áp dụngs: Industrial Control Panels, Motor Drive Front-End Controller, Automotive Body Electronics, White Goods User Interface Controller, Legacy Embedded Replacement Board, Smart Sensor Aggregator.
Industrial Control Panels
The PIC17LC756AT-08/PT's 8-bit RISC core, 32 KB OTP program memory, and 33 I/O pins make it well-suited for industrial control panel applications including HMI button scanning, relay/SSR drivers, and discrete sensor aggregation. The 16-bit instruction word delivers high code density for ladder-logic-style state machines, while the 2.5 V to 5.5 V supply tolerance accepts both 3.3 V and 5 V backplane rails common in industrial PLC and machine-controller designs. The 121 ns instruction cycle supports deterministic scan loops below 1 ms, which is adequate for most discrete control tasks. Hardware I2C and SPI peripherals connect to digital sensor front-ends and display drivers without external glue logic. Note: the OTP memory nature means firmware must be fully validated and burned only once; revision management requires board rework or inventory rotation.
Được đề xuất
Motor Drive Front-End Controller
The PIC17LC756AT-08/PT can serve as the supervisory front-end controller in variable-frequency drives and stepper/servo systems where it handles user inputs, safety interlocks, and command parsing before delegating real-time commutation to a dedicated motor controller. Its 33 I/O lines accommodate enable inputs, fault feedback from gate drivers, brake control outputs, and PWM handshake signals. The 8 MHz CPU throughput supports inner control loops up to ~2 kHz, sufficient for command shaping and protection logic in BLDC and stepper systems. Hardware UART/USART enables RS-232/485 communication with supervisory PLCs or HMIs. The 64-pin TQFP package provides sufficient I/O count for multi-axis front-end controllers without requiring port expanders.
Được đề xuất
Automotive Body Electronics
The PIC17LC756AT-08/PT is appropriate for non-safety automotive body modules such as interior lighting controllers, seat-position memory, mirror adjustment, and accessory multiplexers where its 33 I/O pins handle multiple low-side/high-side driver controls. The wide 2.5 V to 5.5 V supply tolerance accommodates 12 V battery feeds after pre-regulation, and the 902-byte RAM supports CAN-style command buffers when paired with an external CAN transceiver. Note: for AEC-Q100 qualified designs, use the industrial-temperature -I variants. The OTP memory is acceptable for high-volume production runs where firmware revision churn is low and validated firmware is burned only once. Modern designs should migrate to PIC18F or dsPIC33 families with flash memory and CAN peripherals integrated.
Được đề xuất
White Goods User Interface Controller
The PIC17LC756AT-08/PT fits white-goods appliance user-interface designs (washing machines, dishwashers, microwave ovens) where it scans keypad/rotary-encoder inputs, drives 7-segment or character LCD displays, and coordinates timing for heating, pumping, and motor subsystems. Its 32 KB OTP holds complete appliance state machines including wash-cycle profiles and fault logs, while 902 bytes RAM supports run-time cycle variables and EEPROM emulation. The 8 MHz throughput is more than sufficient for human-interface reaction times (sub-100 ms). I2C and SPI peripherals connect to temperature sensors, RTC chips, and LED driver ICs. The 64-pin TQFP package suits main control boards in mid-size appliances where pad count is plentiful.
Được đề xuất
Legacy Embedded Replacement Board
The PIC17LC756AT-08/PT is commonly used as a like-for-like replacement for original PIC17C756A-series boards in legacy products where the firmware has been validated and cannot be re-qualified, and the 64-pin TQFP footprint is already laid out on the PCB. Microchip has placed this part in NRND status but continues to ship for sustainment purposes. Designers maintaining installed-base equipment benefit from identical pinout, identical peripherals, and identical instruction set across the OTP part and flash-based PIC17C76x successors, simplifying board-level drop-in substitution. The 8 MHz CPU maintains backwards-compatible timing for legacy communication stacks and control loops.
Được đề xuất
Smart Sensor Aggregator
The PIC17LC756AT-08/PT can aggregate multiple analog and digital sensors in industrial IoT edge nodes, where it performs sensor polling, threshold detection, and protocol framing before forwarding via UART to a higher-level gateway. The 33 digital I/O lines accommodate SPI/I2C sensor clusters, while the 8 MHz CPU handles sampling-rate scheduling and basic digital filtering. The 902-byte RAM supports circular buffers for sensor data and command frames. The 2.5 V to 5.5 V supply range accepts power directly from 3.3 V LDO outputs of typical sensor-module designs. For new IoT designs, consider migrating to PIC18F or dsPIC33 families with integrated CAN, USB, or Ethernet peripherals.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17LC756AT-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 | PIC17LC756A-08/PT | PIC17LC756AT-08I/PT | PIC17LC756A-08I/PT | PIC17C756A-16/PT | PIC17C756AT-16/PT | PIC17C756A-33E/PT |
|---|---|---|---|---|---|---|---|
| Package | 64-pin TQFP (10x10) | 64-pin TQFP (10x10) - same | 64-pin TQFP (10x10) - same | 64-pin TQFP (10x10) - same | 64-pin TQFP (10x10) - same | 64-pin TQFP (10x10) - same | 64-pin TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP (32 KB) | OTP (32 KB) | OTP (32 KB) | OTP (32 KB) | Flash (32 KB) | Flash (32 KB) | Flash (32 KB) |
| Maximum CPU Clock | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 16 MHz | 16 MHz | 33 MHz |
| RAM Size | 902 bytes | 902 bytes | 902 bytes | 902 bytes | 902 bytes | 902 bytes | 902 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| 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 (typical) | 4.5 V to 5.5 V (typical) | 4.5 V to 5.5 V (typical) |
| Temperature Grade | Commercial | Commercial | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial | Commercial | Extended (-40C to +125C) |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND | NRND |
Bảo phân biệt quan trọng
- 16-bit instruction word architecture delivers higher code density (vsPIC16F877A)
- 33 I/O pins in 64-pin TQFP without port expander (vsPIC16F877A (40-pin DIP))
- Drop-in compatible flash upgrade path exists within same package (vsPIC18F alternatives)
Ghi chú thiết kế
OTP memory cannot be erased or rewritten. Once programmed, the PIC17LC756AT-08/PT cannot be re-flashed; any firmware bug requires board-level rework or part replacement. For new designs and field-upgradable products, migrate to the flash-based PIC17C756A-16/PT or PIC17C766 family. Validate firmware thoroughly using a PIC17C76x flash prototype before committing the OTP part to volume production.
The 64-pin TQFP package requires multiple VDD/VSS pin pairs (typically pins 11/10, 21/20, 39/38, 49/48) for proper power distribution. Decouple each VDD pin with a 100 nF ceramic capacitor placed as close to the IC as possible. Add a single bulk 10 uF tantalum or ceramic capacitor on the main supply rail to handle transient current demands during peripheral switching.
TQFP-64 packages have 0.5 mm pitch leads that require careful PCB layout: use solder paste stencil apertures slightly reduced from pad size (typically 90%) to prevent bridging, ensure proper thermal relief on through-hole pads, and follow JEDEC MS-026 land pattern recommendations. Maintain 0.2 mm clearance between adjacent pads and keep trace widths under 0.25 mm in the lead fanout area.
The PIC17LC756AT-08/PT oscillator pins (OSC1/OSC2) should be routed with short, parallel traces to the crystal or resonator, with a ground guard ring or poured ground plane to minimize noise coupling. Place load capacitors within 3 mm of the OSC pins. Avoid routing high-frequency signals (UART, SPI) parallel to the oscillator traces to prevent clock jitter and EMI issues.
The MCLR reset pin on the PIC17LC756AT-08/PT requires a 10 kohm pull-up resistor to VDD for normal operation. For noise-sensitive environments, add a 100 nF capacitor from MCLR to ground to filter fast transients. The ICSP (In-Circuit Serial Programming) pins RB6/RB7 share functions with general-purpose I/O; ensure pull-ups or proper isolation if these pins are used for external loads during programming.
Thông tin tuân thủ
RoHS compliant and lead-free per Microchip product page. Not AEC-Q100 qualified; the -I industrial grade variant extends operating temperature to -40C to +85C but is not automotive-qualified. For AEC-Q100 applications, consider dsPIC33EV automotive family.
