PIC17LC756AT-08I/PT - 8-Bit 8MHz 32KB OTP MCU 64-TQFP | Microchip
料号： PIC17LC756AT-08I/PT ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.85 | $12.85 |
| 10 | $11.55 | $115.50 |
| 100 | $10.25 | $1,025.00 |
| 500 | $9.2 | $4,600.00 |
| 1,000 | $8.4 | $8,400.00 |
PIC17LC756AT-08I/PT 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (ROM/Flash/OTP), working RAM, peripheral set, and I/O on one die. Microcontrollers sit in the broader hierarchy of embedded processors -> microcontrollers -> 8-bit microcontrollers -> OTP-based microcontrollers. The PIC17C family specifically targets higher-performance 8-bit applications with RISC Harvard architecture, multiple timer/counter modules, USART, and PWM peripherals — bridging the gap between simple 8-bit MCUs and 16-bit dsPIC devices.
Key features include an 8 MHz maximum operating frequency, 121 ns instruction cycle, internal EEPROM data memory, dual analog comparators, capture/compare/PWM modules, USART serial port, and a hardware multiplier for faster arithmetic. The wide 2.5 V to 5.5 V supply range supports both 3.3 V and 5 V designs. The device is offered in windowed CERDIP, plastic DIP, and TQFP variants for prototyping and high-volume production.
The PIC17C756A architecture uses a 16-bit wide instruction word and a separate 8-bit data path, with Harvard memory structure isolating program and data buses. This enables deterministic single-cycle execution and predictable interrupt latency for real-time control. The device includes up to 12 channels of 12-bit A/D conversion, two PWM outputs, three 16-bit timer/counters, and a USART supporting RS-232/RS-485 communication.
Typical applications include industrial motor control, HVAC actuators, smart sensor nodes, automotive body electronics (non-safety), and consumer white-goods control boards. The 50 I/O pins permit direct connection to keypads, LED matrices, and parallel LCDs. Compared to modern PIC18F devices, the PIC17C756A is preferred when legacy codebases or pin-compatible migration from the original PIC17C family is required.
Designers should verify that target peripherals and timers match the PIC17LC756A silicon revision before porting code, and add a 0.1 uF decoupling capacitor adjacent to every VDD/VSS pair. Note that Microchip has formally migrated customers to the PIC18F6520 for new designs; the PIC17LC756A remains available for legacy and maintenance programs.
This page consolidates distributor pricing, drop-in same-package alternatives within the PIC17 family, and design notes not found in the manufacturer datasheet alone, giving procurement and engineering teams a single reference point for lifecycle decisions.
直接替换替代料： PIC17LC756AT-08I/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC17LC756AT-08I/PT （相同外形与封装尺寸） ——差异在于 I/O Pins, Core Architecture, Package, Data Bus Width, Instruction Cycle Time.
快速对比工具——选择替代料号进行并排对比：
PIC17LC756A-08I/PT
✅ 直接替换✓ 有现货
$12.3 / 个
查看数据手册 →PIC17LC756AT-08I/L
✅ 直接替换✓ 有现货
$10.95 / 个
查看数据手册 →PIC17LC756A-08I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$12.3 / 个
查看数据手册 →PIC17LC752T-08I/PT
✅ 直接替换✓ 有现货
$7.45 / 个
查看数据手册 →PIC17LC752T-08I/L
✅ 直接替换✓ 有现货
$4.35 / 个
查看数据手册 →PIC17C756AT-33I/L
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$12.4 / 个
查看数据手册 →PIC18F6520-I/PT
✅ 直接替换✓ 有现货
$6.1 / 个
查看数据手册 →PIC17LC756AT-08I/PT 最大额定值与电气特性
| Product Family | PIC17C |
| Core Architecture | 8-bit RISC (Harvard) |
| Clock Speed (Max) | 8 MHz |
| Instruction Cycle | 121 ns (single cycle, 2-cycle branches) |
| MIPS | 8.25 MIPS |
| Program Memory | 32 KB (16K x 16) OTP |
| RAM | 902 bytes |
| I/O Pins | 50 |
| 电源电压 | 2.5 V to 5.5 V |
| 数据总线宽度 | 16-bit (instruction) / 8-bit (data) |
| ADC | 12-bit, up to 12 channels |
| Timers | Three 16-bit timer/counters |
| Communication | USART (RS-232/RS-485) |
| 工作温度 | -40C to +85C (Industrial) |
| 封装 | 64-pin TQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| Instruction Set | 58 single-word instructions |
| Analog Comparators | 2 |
| PWM Outputs | 2 |
| MSL 等级 | 3 (168 hours) |
PIC17LC756AT-08I/PT 引脚配置
| 引脚 1 | MCLR/VPP — Master Clear (reset) input or programming voltage |
| 引脚 2 | OSC1 — Crystal oscillator input |
| 引脚 3 | OSC2 — Crystal oscillator output |
| 引脚 4 | RA0 — Port A bit 0 (digital I/O or analog input AN0) |
| 引脚 5 | RA1 — Port A bit 1 (digital I/O or analog input AN1) |
| 引脚 6 | RA2 — Port A bit 2 (digital I/O or analog input AN2) |
| 引脚 7 | RA3 — Port A bit 3 (digital I/O or analog input AN3) |
| 引脚 8 | RA4 — Port A bit 4 (digital I/O or analog input AN4) |
| 引脚 9 | RA5 — Port A bit 5 (digital I/O or analog input AN5) |
| 引脚 10 | RA6 — Port A bit 6 (digital I/O or analog input AN6) |
| 引脚 11 | RA7 — Port A bit 7 (digital I/O or analog input AN7) |
| 引脚 12 | VSS — Ground reference |
| 引脚 13 | RB0 — Port B bit 0 (digital I/O, external interrupt) |
| 引脚 14 | RB1 — Port B bit 1 (digital I/O) |
| 引脚 15 | RB2 — Port B bit 2 (digital I/O) |
| 引脚 16 | RB3 — Port B bit 3 (digital I/O) |
| 引脚 17 | RB4 — Port B bit 4 (digital I/O) |
| 引脚 18 | RB5 — Port B bit 5 (digital I/O) |
| 引脚 19 | RB6 — Port B bit 6 (digital I/O, ICD clock) |
| 引脚 20 | RB7 — Port B bit 7 (digital I/O, ICD data) |
| 引脚 21 | VDD — Positive supply (2.5 V to 5.5 V) |
| 引脚 22 | VSS — Ground reference |
| 引脚 23 | RC0 — Port C bit 0 (digital I/O or PWM output) |
| 引脚 24 | RC1 — Port C bit 1 (digital I/O or PWM output) |
| 引脚 25 | RC2 — Port C bit 2 (digital I/O) |
| 引脚 26 | RC3 — Port C bit 3 (digital I/O) |
| 引脚 27 | RC4 — Port C bit 4 (digital I/O) |
| 引脚 28 | RC5 — Port C bit 5 (digital I/O) |
| 引脚 29 | RC6 — Port C bit 6 (digital I/O, USART TX) |
| 引脚 30 | RC7 — Port C bit 7 (digital I/O, USART RX) |
| 引脚 31 | VSS — Ground reference |
| 引脚 32 | RD0 — Port D bit 0 (digital I/O) |
| 引脚 33 | RD1 — Port D bit 1 (digital I/O) |
| 引脚 34 | RD2 — Port D bit 2 (digital I/O) |
| 引脚 35 | RD3 — Port D bit 3 (digital I/O) |
| 引脚 36 | RD4 — Port D bit 4 (digital I/O) |
| 引脚 37 | RD5 — Port D bit 5 (digital I/O) |
| 引脚 38 | RD6 — Port D bit 6 (digital I/O) |
| 引脚 39 | RD7 — Port D bit 7 (digital I/O) |
| 引脚 40 | VDD — Positive supply (2.5 V to 5.5 V) |
| 引脚 41 | VSS — Ground reference |
| 引脚 42 | RE0 — Port E bit 0 (digital I/O) |
| 引脚 43 | RE1 — Port E bit 1 (digital I/O) |
| 引脚 44 | RE2 — Port E bit 2 (digital I/O) |
| 引脚 45 | RE3 — Port E bit 3 (digital I/O) |
| 引脚 46 | RE4 — Port E bit 4 (digital I/O) |
| 引脚 47 | RE5 — Port E bit 5 (digital I/O) |
| 引脚 48 | RE6 — Port E bit 6 (digital I/O) |
| 引脚 49 | RE7 — Port E bit 7 (digital I/O) |
| 引脚 50 | VSS — Ground reference |
| 引脚 51 | NC — Not connected (per datasheet) |
| 引脚 52 | NC — Not connected (per datasheet) |
| 引脚 53 | NC — Not connected (per datasheet) |
| 引脚 54 | NC — Not connected (per datasheet) |
| 引脚 55 | NC — Not connected (per datasheet) |
| 引脚 56 | NC — Not connected (per datasheet) |
| 引脚 57 | NC — Not connected (per datasheet) |
| 引脚 58 | NC — Not connected (per datasheet) |
| 引脚 59 | NC — Not connected (per datasheet) |
| 引脚 60 | NC — Not connected (per datasheet) |
| 引脚 61 | NC — Not connected (per datasheet) |
| 引脚 62 | NC — Not connected (per datasheet) |
| 引脚 63 | NC — Not connected (per datasheet) |
| 引脚 64 | VSS — Ground reference |
典型应用
PIC17LC756AT-08I/PT 适用于 6 应用s: Industrial Motor Control, HVAC Actuator and Damper Control, Smart Sensor Hub with Analog Front-End, Automotive Body Electronics (Non-Safety), Consumer Appliance Control Boards, Legacy Industrial Controller Replacement.
Industrial Motor Control
The PIC17LC756AT-08I/PT fits industrial motor-control designs through its dual 16-bit PWM outputs, three 16-bit timer/counters, and 12-bit ADC with up to 12 channels — sufficient for closed-loop BLDC or stepper control. At 8.25 MIPS, the firmware can execute a 10 kHz control loop with comfortable margin for sensor sampling and PID computation. The 50 I/O pins drive gate drivers, encoder inputs, and fault signals directly without external glue logic, while the 2.5 V to 5.5 V supply range simplifies integration with both 3.3 V and 5 V gate drivers on the same board.
推荐
HVAC Actuator and Damper Control
For HVAC damper and valve actuators, the PIC17LC756AT-08I/PT provides the 12-bit ADC precision needed for temperature and pressure sensing, while the USART enables communication with a central building controller via RS-485. The 902 bytes of RAM accommodates control loops and protocol stacks, and 50 I/O lines drive relays, triac interfaces, and character LCD displays. Industrial -40C to +85C temperature rating ensures reliable operation in unconditioned plant rooms, and the OTP program memory protects firmware IP after deployment.
推荐
Smart Sensor Hub with Analog Front-End
The PIC17LC756AT-08I/PT's 12-channel 12-bit ADC, dual analog comparators, and 50 I/O pins make it suitable for multi-sensor aggregation hubs in industrial monitoring. Engineers can sample thermocouples, RTDs, and 4-20 mA loops directly, then process signals in firmware at 8.25 MIPS. The wide 2.5 V to 5.5 V supply range supports both loop-powered (3.3 V) and line-powered (5 V) topologies. USART enables forwarding data to a central PLC or gateway over RS-232/RS-485.
推荐
Automotive Body Electronics (Non-Safety)
For non-safety body electronics such as seat controllers, mirror adjusters, and interior lighting, the PIC17LC756AT-08I/PT delivers 50 I/O pins, PWM outputs, and ADC channels at industrial temperature grade. Although not AEC-Q100 qualified, the device has been widely used in 12 V body modules with external load-dump protection. The OTP memory locks firmware against field tampering, and the 8 MHz clock supports LIN-style software UART for low-cost body networking. For new automotive designs, consider AEC-Q100-qualified PIC18F alternatives.
推荐
Consumer Appliance Control Boards
White-goods controllers in washing machines, dishwashers, and microwave ovens benefit from the PIC17LC756AT-08I/PT's 50 I/O for keypad scanning, seven-segment or character-LCD display driving, and triac-based load switching. The 32 KB OTP program memory accommodates state-machine firmware and lookup tables, while the USART interfaces with inverter boards or sensor modules. Industrial temperature rating suits under-cabinet appliance environments where ambient can reach 70C during operation. OTP locking protects manufacturer firmware IP.
推荐
Legacy Industrial Controller Replacement
For maintenance and lifecycle extension of legacy PIC17C756A-based equipment, the PIC17LC756AT-08I/PT provides an identical silicon replacement with extended voltage range (down to 2.5 V) and modern lead-free TQFP packaging. Industrial -40C to +85C operation matches the deployed fleet, and 50 I/O maintain backward compatibility with existing field wiring and I/O expansion boards. Engineers can drop the LC variant into the original PCB footprint and re-program from the same HEX file, minimizing re-certification cost.
推荐
推荐产品汇总
工程参考数据： PIC17LC756AT-08I/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC17LC756A-08I/PT | PIC17LC752T-08I/PT | PIC18F6520-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same |
| Core / Architecture | 8-bit RISC (PIC17C) | 8-bit RISC (PIC17C) - same | 8-bit RISC (PIC17C) - same | 8-bit RISC (PIC18F enhanced) - different family |
| Program Memory | 32 KB (16K x 16) OTP | 32 KB OTP - same | 16 KB OTP - 50% | 32 KB Flash - reprogrammable |
| Maximum Clock | 8 MHz | 8 MHz - same | 8 MHz - same | 40 MHz - 5x faster |
| RAM | 902 bytes | 902 bytes - same | 678 bytes - 25% | 2048 bytes - 2.3x |
| I/O Pins | 50 | 50 - same | 50 - same | 52 - same |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V - same | 2.5 V to 5.5 V - same | 2.0 V to 5.5 V - wider |
| Lifecycle Status | NRND | NRND | NRND | Active |
关键差异点
- Wide 2.5 V to 5.5 V supply range (LC variant) vs 5 V only on standard PIC17C756A （对比 PIC17C756A-08I/PT (without 'L'))
- Microchip-recommended migration to Flash-based successor with active lifecycle （对比 PIC18F6520-I/PT)
- 50 I/O pins with 12-channel 12-bit ADC on-chip vs external ADC requirements on simpler PIC16 family （对比 PIC16LF877A-I/PT)
设计说明
Place a 0.1 uF decoupling capacitor within 5 mm of every VDD/VSS pair on the 64-pin TQFP, and add a bulk 10 uF tantalum or ceramic capacitor adjacent to the highest-current VDD pin (typically pin 21). The PIC17LC756AT-08I/PT has multiple VDD/VSS pins (pins 21, 40 VDD; pins 12, 22, 31, 41, 50, 64 VSS) and all must be connected for proper operation. Decoupling prevents logic noise from coupling into the analog supply and reduces ADC sampling jitter. Brown-out reset (BOR) is enabled by configuration fuse and should be retained for industrial designs.
Route the 8 MHz crystal traces (OSC1/OSC2, pins 2-3) symmetrically and as short as possible, with ground guarding on both sides to minimize EMI pickup. The 64-pin TQFP (10x10 mm) has a 0.5 mm pitch, requiring fine-pick-and-place and proper PCB pad design per IPC-7351. Add a guard ring around the analog input pins (RA0-RA7) to isolate them from digital switching noise, since the 12-bit ADC can resolve 1 mV at full scale. For OTP programming, expose the MCLR/VPP pin (pin 1) to a header for in-circuit programming.
Do not assume the PIC17LC756AT-08I/PT is a drop-in for the PIC18F6520 - the peripheral register map, interrupt vector table, and instruction set differ between PIC17 and PIC18 families, so firmware must be ported even though the pinout is compatible. Configuration bits must be set for oscillator mode (HS for >4 MHz crystal), watchdog timer enable, code protection, and brown-out reset voltage. Using the wrong oscillator mode is the most common reason for non-starting boards; verify with a scope on OSC2 before debugging code.
合规信息
RoHS and REACH status not confirmed in provided data. Industrial temperature grade -40C to +85C; not AEC-Q100 qualified - this part is not recommended for safety-critical automotive applications.
