PIC17LC756A-08I/PT - 8-bit 8MHz 32KB OTP MCU 64-TQFP | Microchip
MPN： PIC17LC756A-08I/PT ✗ 停產PIC17LC756A-08I/PT 概覽
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path. Within the broader semiconductor taxonomy, an MCU sits inside the microcontroller family, which itself is a sub-category of microprocessors and embedded computing devices. PIC microcontrollers use a Harvard RISC architecture and a 16-bit instruction word, so a 32 KB OTP array actually stores 16K instructions, giving them far higher code density than 8051-class devices while retaining a small footprint and deterministic interrupt response.
Key features include a maximum clock input of 33 MHz (8 MHz core / 08 speed grade), 2.5 V to 5.5 V single-supply operation, an 8-level hardware stack, and only 58 single-word instructions to learn. The peripheral set covers a 10-bit A/D converter, capture/compare/PWM modules, USART, and synchronous serial port. The LC variant offers low-voltage operation, while the I suffix designates the -40C to +85C industrial temperature grade and the /PT suffix indicates 64-pin TQFP tray packaging.
Typical applications include industrial control, motor control, smart-sensor signal conditioning, and embedded communication bridges. The wide 2.5-5.5 V supply range and generous I/O count make it a good fit for replacing discrete logic in cost-sensitive designs. A newer recommended migration is PIC18F6520, which adds Flash memory, more RAM, and improved peripherals while keeping the same 64-pin TQFP footprint.
When designing with this part, ensure your programmer supports OTP parts (the LC suffix indicates low-voltage, not low-power) and that the brown-out and watchdog timer configuration bits are correctly set for your application's power profile. Decoupling should use 100 nF ceramic on each VDD pin placed within 5 mm of the IC.
直接替換替代品，適用於 PIC17LC756A-08I/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC17LC756A-08I/PT （相同外形與佔位） — 差異在於 Core Architecture, Data Bus Width, Maximum Clock Frequency, Package, Program Memory Size.
PIC17LC756A-08/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC17C756A-16I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC17C756A-16E/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC17C756AT-16/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC17LC756AT-08I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC17C756A-33E/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC17LC756A-08I/PT 最大額定值與電氣特性
| Core Architecture | 8-bit PIC17 RISC (Harvard) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 32 KB (16K x 16 instructions) |
| RAM Size | 902 bytes |
| 最大時脈頻率 | 33 MHz (8 MHz at -08 speed grade) |
| Instruction Cycle Time | 121 ns (single-cycle) |
| 資料匯流排寬度 | 16 bits (instruction) / 8 bits (data) |
| Supply Voltage Range | 2.5 V to 5.5 V |
| I/O Pins | 50 (33-50 depending on peripheral use) |
| A/D Converter | 10-bit, 12 channels |
| 工作溫度範圍 | -40C to +85C (Industrial) |
| 封裝 | 64-pin TQFP (10x10 mm) |
| 安裝類型 | Surface Mount |
| Instruction Set | 58 single-word instructions |
| RoHS 狀態 | Compliant |
PIC17LC756A-08I/PT 腳位配置
| 腳位 1 | RA0/AN0 — Digital I/O / analog input channel 0 |
| 腳位 2 | RA1/AN1 — Digital I/O / analog input channel 1 |
| 腳位 3 | RA2/AN2 — Digital I/O / analog input channel 2 |
| 腳位 4 | RA3/AN3/VREF+ — Digital I/O / analog input 3 / ADC VREF+ |
| 腳位 5 | RA4/AN4 — Digital I/O / analog input channel 4 |
| 腳位 6 | RA5/AN5 — Digital I/O / analog input channel 5 |
| 腳位 7 | OSC1 — Crystal oscillator input |
| 腳位 8 | OSC2 — Crystal oscillator output |
| 腳位 9 | MCLR — Master clear reset (active low) |
| 腳位 10 | VSS — Ground |
| 腳位 11 | VDD — Positive supply |
| 腳位 12 | RB0/INT0 — Digital I/O / external interrupt 0 |
| 腳位 13 | RB1/INT1 — Digital I/O / external interrupt 1 |
| 腳位 14 | RB2/INT2 — Digital I/O / external interrupt 2 |
| 腳位 15 | RB3/INT3 — Digital I/O / external interrupt 3 |
| 腳位 16 | RB4 — Digital I/O port B bit 4 |
| 腳位 17 | RB5 — Digital I/O port B bit 5 |
| 腳位 18 | RB6 — Digital I/O port B bit 6 |
| 腳位 19 | RB7 — Digital I/O port B bit 7 |
| 腳位 20 | VSS — Ground |
| 腳位 21 | VDD — Positive supply |
| 腳位 22 | RC0 — Digital I/O port C bit 0 |
| 腳位 23 | RC1 — Digital I/O port C bit 1 |
| 腳位 24 | RC2 — Digital I/O port C bit 2 |
| 腳位 25 | RC3 — Digital I/O port C bit 3 |
| 腳位 26 | RC4 — Digital I/O port C bit 4 |
| 腳位 27 | RC5 — Digital I/O port C bit 5 |
| 腳位 28 | RC6/TX — Digital I/O / USART transmit |
| 腳位 29 | RC7/RX — Digital I/O / USART receive |
| 腳位 30 | VSS — Ground |
| 腳位 31 | VDD — Positive supply |
| 腳位 32 | RD0 — Digital I/O port D bit 0 |
| 腳位 33 | RD1 — Digital I/O port D bit 1 |
| 腳位 34 | RD2 — Digital I/O port D bit 2 |
| 腳位 35 | RD3 — Digital I/O port D bit 3 |
| 腳位 36 | RD4 — Digital I/O port D bit 4 |
| 腳位 37 | RD5 — Digital I/O port D bit 5 |
| 腳位 38 | RD6 — Digital I/O port D bit 6 |
| 腳位 39 | RD7 — Digital I/O port D bit 7 |
| 腳位 40 | VSS — Ground |
| 腳位 41 | VDD — Positive supply |
| 腳位 42 | RE0 — Digital I/O port E bit 0 |
| 腳位 43 | RE1 — Digital I/O port E bit 1 |
| 腳位 44 | RE2 — Digital I/O port E bit 2 |
| 腳位 45 | RE3 — Digital I/O port E bit 3 |
| 腳位 46 | RE4 — Digital I/O port E bit 4 |
| 腳位 47 | RE5 — Digital I/O port E bit 5 |
| 腳位 48 | RE6 — Digital I/O port E bit 6 |
| 腳位 49 | RE7 — Digital I/O port E bit 7 |
| 腳位 50 | VSS — Ground |
| 腳位 51 | VDD — Positive supply |
| 腳位 52 | RF0/AN6 — Digital I/O / analog input channel 6 |
| 腳位 53 | RF1/AN7 — Digital I/O / analog input channel 7 |
| 腳位 54 | RF2/AN8 — Digital I/O / analog input channel 8 |
| 腳位 55 | RF3/AN9 — Digital I/O / analog input channel 9 |
| 腳位 56 | RF4/AN10 — Digital I/O / analog input channel 10 |
| 腳位 57 | RF5/AN11 — Digital I/O / analog input channel 11 |
| 腳位 58 | RF6 — Digital I/O port F bit 6 |
| 腳位 59 | RF7 — Digital I/O port F bit 7 |
| 腳位 60 | AVSS — Analog ground |
| 腳位 61 | AVDD — Analog supply |
| 腳位 62 | VREF- — ADC negative reference |
| 腳位 63 | VREF+ — ADC positive reference |
| 腳位 64 | NC — Not connected (per datasheet) |
典型應用
PIC17LC756A-08I/PT 適用於 6 應用s: Industrial Process Control, Motor Control and PWM Drive, Smart Sensor Signal Conditioning, Embedded Communication Bridge, HMI Keypad and Display Controller, Legacy Industrial Sustaining Engineering.
Industrial Process Control
The PIC17LC756A-08I/PT is well matched to industrial process controllers thanks to its 50 digital I/O lines and on-chip 10-bit A/D converter with up to 12 input channels. The 2.5 V to 5.5 V supply range accepts both 3.3 V and 5 V rails commonly found in PLC backplanes, while the 902 bytes of RAM buffer sensor scans before forwarding to a host. Its 8.25 MIPS throughput is sufficient for PID loops at 1 kHz rates on small mechanical systems, and the industrial -40C to +85C temperature grade handles unconditioned cabinet environments.
推薦
Motor Control and PWM Drive
The PIC17LC756A-08I/PT integrates capture/compare/PWM modules suited for DC brushed and small stepper motor control. The 50 I/O pins drive H-bridge logic and accept encoder feedback, while the 121 ns instruction cycle keeps PWM update rates above 100 kHz for smooth torque control. The wide 2.5-5.5 V supply range allows direct battery operation in 3.3 V cordless tools. Designers should leverage the PWM fault input and configurable dead-band features documented in the PIC17C family reference manual.
推薦
Smart Sensor Signal Conditioning
With its on-chip 10-bit A/D converter and 50 I/O pins, the PIC17LC756A-08I/PT serves as a front-end conditioner for multi-sensor instruments. The 902 bytes of RAM hold calibration constants and recent samples, while the 58-instruction RISC core executes linearization math in real time. The 32 KB OTP program memory stores lookup tables for thermocouple and RTD linearization. The industrial temperature grade and wide supply range let it sit next to the sensor head without additional regulation.
推薦
Embedded Communication Bridge
The PIC17LC756A-08I/PT integrates a USART and synchronous serial port, allowing it to bridge between RS-232, RS-485, and SPI peripherals. Its 50 I/O pins easily drive multiple transceivers, and the 8.25 MIPS throughput handles protocol conversion at 115200 baud with margin to spare. The wide 2.5-5.5 V supply makes it compatible with both 3.3 V modern logic and legacy 5 V field equipment, while the OTP memory stores immutable protocol stacks for industrial networks.
推薦
HMI Keypad and Display Controller
The 50 I/O pins on the PIC17LC756A-08I/PT can scan 8x8 matrix keypads while simultaneously driving character LCDs through software bit-banging, eliminating external controller ICs. The 902 bytes of RAM store menu state and the 32 KB OTP holds multilingual font tables. The 8 MHz clock provides enough throughput to debounce key presses and refresh displays without flicker. Low-voltage 2.5 V operation allows battery-backed display modules in portable instruments.
推薦
Legacy Industrial Sustaining Engineering
Because Microchip has marked the PIC17LC756A-08I/PT as Not Recommended for New Designs, it is primarily used today to sustain long-lifecycle industrial products such as factory automation controllers, medical instruments, and aerospace ground support equipment already in the field. Its OTP memory provides immutable firmware that meets regulatory traceability for medical and aerospace certifications. Designers maintaining these products should plan migration to PIC18F6520 while keeping the PIC17LC756A-08I/PT firmware image as a known-good baseline.
推薦
推薦產品摘要
工程參考資料，適用於 PIC17LC756A-08I/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC17LC756A-08/PT | PIC17C756A-16I/PT | PIC17C756A-16E/PT | PIC17C756AT-16/PT | PIC17LC756AT-08I/PT | PIC17C756A-33E/PT |
|---|---|---|---|---|---|---|---|
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP | 32 KB OTP |
| RAM Size | 902 bytes | 902 bytes | 902 bytes | 902 bytes | 902 bytes | 902 bytes | 902 bytes |
| Max Clock | 8 MHz (-08 grade) | 8 MHz | 16 MHz | 16 MHz | 16 MHz | 8 MHz | 33 MHz |
| Supply Voltage | 2.5-5.5 V | 2.5-5.5 V | 4.5-5.5 V | 4.5-5.5 V | 4.5-5.5 V | 2.5-5.5 V | 4.5-5.5 V |
| Temperature Grade | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +125C (Extended) |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND | NRND |
主要差異化特點
- Low-voltage operation from 2.5 V (對比PIC17C756A-16I/PT)
- Industrial -40C to +85C temperature grade (對比PIC17LC756A-08/PT)
- On-chip 10-bit A/D with 12 input channels (對比PIC16F877A-I/P)
設計說明
The PIC17LC756A-08I/PT requires four VDD/VSS pin pairs plus separate AVDD/AVSS for the analog section. Place one 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin and a single 10 uF bulk capacitor near the package. The analog supply AVDD should be filtered with a ferrite bead and a 10 uF + 100 nF pair to keep digital switching noise out of the ADC reference. Brown-out reset (BOR) must be enabled in configuration bits for any application where VDD could droop below 2.5 V during motor stalls or inductive load transients.
The 64-pin TQFP (10x10 mm) has a 0.5 mm pitch and requires IPC-7351 land patterns with 0.30 mm pads and 0.20 mm solder mask dams. Use NSMD (non-solder-mask-defined) pads for stronger solder joints, and place a continuous ground plane on the second layer directly beneath the IC to reduce EMI. Keep crystal traces short (under 10 mm) and surround them with a ground guard ring. Avoid routing high-speed digital signals across the analog AVSS/AVDD region to minimize ADC crosstalk.
Do not confuse the LC suffix (low-voltage, 2.5-5.5 V) with low-power; the PIC17 family has no sleep-mode current advantage over PIC17C parts at the same clock. OTP memory is one-time programmable - any bit-cell programming error is permanent and the device must be discarded. Configuration bits, including oscillator mode and watchdog timer enable, are programmed into the same OTP array and cannot be changed after programming. Always read-back configuration bits before programming to verify the device is blank.
合規資訊
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified; PIC17 family was not designed for automotive safety-critical applications. Halogen-free status not explicitly stated in verified data - marked unknown.
