PIC17LC756A-08I/PT - 8-bit 8MHz 32KB OTP MCU 64-TQFP | Microchip
MPN: PIC17LC756A-08I/PT ✗ Cuối đờiPIC17LC756A-08I/PT Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC17LC756A-08I/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 PIC17LC756A-08I/PT (cùng hình factor và footprint) — khác nhau ở Core Architecture, Data Bus Width, Maximum Clock Frequency, Package, Program Memory Size.
PIC17LC756A-08/PT
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Xem tài liệu →PIC17C756A-16E/PT
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Xem tài liệu →PIC17C756AT-16/PT
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Xem tài liệu →PIC17LC756AT-08I/PT
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Xem tài liệu →PIC17C756A-33E/PT
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Xem tài liệu →PIC17LC756A-08I/PT Tỷ lệ tối đa & tính chất điện
| 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 |
| Tần số xung maksimum | 33 MHz (8 MHz at -08 speed grade) |
| Instruction Cycle Time | 121 ns (single-cycle) |
| Bề rộng đường dữ liệu | 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 |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Hộp | 64-pin TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Instruction Set | 58 single-word instructions |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC17LC756A-08I/PT
| Chân 1 | RA0/AN0 — Digital I/O / analog input channel 0 |
| Chân 2 | RA1/AN1 — Digital I/O / analog input channel 1 |
| Chân 3 | RA2/AN2 — Digital I/O / analog input channel 2 |
| Chân 4 | RA3/AN3/VREF+ — Digital I/O / analog input 3 / ADC VREF+ |
| Chân 5 | RA4/AN4 — Digital I/O / analog input channel 4 |
| Chân 6 | RA5/AN5 — Digital I/O / analog input channel 5 |
| Chân 7 | OSC1 — Crystal oscillator input |
| Chân 8 | OSC2 — Crystal oscillator output |
| Chân 9 | MCLR — Master clear reset (active low) |
| Chân 10 | VSS — Ground |
| Chân 11 | VDD — Positive supply |
| Chân 12 | RB0/INT0 — Digital I/O / external interrupt 0 |
| Chân 13 | RB1/INT1 — Digital I/O / external interrupt 1 |
| Chân 14 | RB2/INT2 — Digital I/O / external interrupt 2 |
| Chân 15 | RB3/INT3 — Digital I/O / external interrupt 3 |
| Chân 16 | RB4 — Digital I/O port B bit 4 |
| Chân 17 | RB5 — Digital I/O port B bit 5 |
| Chân 18 | RB6 — Digital I/O port B bit 6 |
| Chân 19 | RB7 — Digital I/O port B bit 7 |
| Chân 20 | VSS — Ground |
| Chân 21 | VDD — Positive supply |
| Chân 22 | RC0 — Digital I/O port C bit 0 |
| Chân 23 | RC1 — Digital I/O port C bit 1 |
| Chân 24 | RC2 — Digital I/O port C bit 2 |
| Chân 25 | RC3 — Digital I/O port C bit 3 |
| Chân 26 | RC4 — Digital I/O port C bit 4 |
| Chân 27 | RC5 — Digital I/O port C bit 5 |
| Chân 28 | RC6/TX — Digital I/O / USART transmit |
| Chân 29 | RC7/RX — Digital I/O / USART receive |
| Chân 30 | VSS — Ground |
| Chân 31 | VDD — Positive supply |
| Chân 32 | RD0 — Digital I/O port D bit 0 |
| Chân 33 | RD1 — Digital I/O port D bit 1 |
| Chân 34 | RD2 — Digital I/O port D bit 2 |
| Chân 35 | RD3 — Digital I/O port D bit 3 |
| Chân 36 | RD4 — Digital I/O port D bit 4 |
| Chân 37 | RD5 — Digital I/O port D bit 5 |
| Chân 38 | RD6 — Digital I/O port D bit 6 |
| Chân 39 | RD7 — Digital I/O port D bit 7 |
| Chân 40 | VSS — Ground |
| Chân 41 | VDD — Positive supply |
| Chân 42 | RE0 — Digital I/O port E bit 0 |
| Chân 43 | RE1 — Digital I/O port E bit 1 |
| Chân 44 | RE2 — Digital I/O port E bit 2 |
| Chân 45 | RE3 — Digital I/O port E bit 3 |
| Chân 46 | RE4 — Digital I/O port E bit 4 |
| Chân 47 | RE5 — Digital I/O port E bit 5 |
| Chân 48 | RE6 — Digital I/O port E bit 6 |
| Chân 49 | RE7 — Digital I/O port E bit 7 |
| Chân 50 | VSS — Ground |
| Chân 51 | VDD — Positive supply |
| Chân 52 | RF0/AN6 — Digital I/O / analog input channel 6 |
| Chân 53 | RF1/AN7 — Digital I/O / analog input channel 7 |
| Chân 54 | RF2/AN8 — Digital I/O / analog input channel 8 |
| Chân 55 | RF3/AN9 — Digital I/O / analog input channel 9 |
| Chân 56 | RF4/AN10 — Digital I/O / analog input channel 10 |
| Chân 57 | RF5/AN11 — Digital I/O / analog input channel 11 |
| Chân 58 | RF6 — Digital I/O port F bit 6 |
| Chân 59 | RF7 — Digital I/O port F bit 7 |
| Chân 60 | AVSS — Analog ground |
| Chân 61 | AVDD — Analog supply |
| Chân 62 | VREF- — ADC negative reference |
| Chân 63 | VREF+ — ADC positive reference |
| Chân 64 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC17LC756A-08I/PT phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17LC756A-08I/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 | 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 |
Bảo phân biệt quan trọng
- Low-voltage operation from 2.5 V (vsPIC17C756A-16I/PT)
- Industrial -40C to +85C temperature grade (vsPIC17LC756A-08/PT)
- On-chip 10-bit A/D with 12 input channels (vsPIC16F877A-I/P)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
