PIC17C756AT-33/PT - 8-bit 33MHz OTP MCU, 32KB | Microchip
MPN: PIC17C756AT-33/PT ⚠ Lần mua cuốiPIC17C756AT-33/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, RAM, and peripheral interfaces. The PIC17C series sits above the PIC16C family in Microchip's 8-bit hierarchy, offering higher instruction throughput (8.25 MIPS at 33 MHz), a wider 16-bit program memory data bus, and extended peripherals while maintaining upward compatibility with PIC16C5X, PIC12CXXX, and PIC16CXX code. OTP (One-Time Programmable) EPROM technology is suited for volume production where the firmware is finalized but does not need field re-programmability.
Key features include the 33 MHz clock input, single-cycle hardware multiplier, 121 ns instruction execution (excluding branches and table reads/writes which take two cycles), Brown-out Detect/Reset, Power-on Reset, Watchdog Timer, PWM, plus serial interfaces (I2C, SPI, USART) and a 10-bit ADC. According to the verified Microchip product page, the part operates from a single 4.5 V to 5.5 V supply and provides 50 general-purpose I/O pins.
The PIC17C756A architecture uses a RISC-style Harvard CPU with a 16-bit program memory bus and 8-bit data path, an 8-level hardware stack, and interrupt logic supporting 12 sources. The wide external memory bus and 10-bit ADC make it suitable for mixed-signal embedded control.
Typical applications include industrial motor control, building automation, instrumentation front-ends, and embedded control requiring moderate code density with 32 KB of OTP and 50 I/O lines. It is also used in legacy designs where Microchip recommends migrating to PIC18F6520 for new designs.
When designing with this device, ensure the 4.5-5.5 V supply is well-decoupled and that oscillator layout guidelines are followed because the 33 MHz clock leaves little timing margin. Microchip recommends PIC18F6520 as a modern, flash-based successor.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that consolidate information not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC17C756AT-33/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 PIC17C756AT-33/PT (cùng hình factor và footprint) — khác nhau ở Data Bus Width, Program Memory Type, ADC, Core Architecture, Package.
PIC17C756AT-33I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C756AT-16/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C756A-16I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C756A-16E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C756A-33E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C756AT-33/PT Tỷ lệ tối đa & tính chất điện
| Core Processor | PIC |
| Core Size | 8-bit |
| Core Series | PIC17C |
| Clock Speed (max) | 33 MHz |
| Instruction Cycle Time | 121 ns (single-cycle) |
| Throughput | 8.25 MIPS |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 32 KB (16K x 16) |
| RAM Size | 902 x 8 bytes |
| Bề rộng đường dữ liệu | 16-bit (program) / 8-bit (data) |
| Number of I/O Pins | 50 |
| ADC | 10-bit A/D converter |
| Supply Voltage (Vdd) | 4.5 V to 5.5 V |
| Hộp | 64-pin TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
Cấu hình chân PIC17C756AT-33/PT
| Chân 1 | OSC1 — Oscillator input |
| Chân 2 | OSC2 — Oscillator output |
| Chân 3 | MCLR — Master clear reset input |
| Chân 4 | RA0 — PORTA I/O / analog input |
| Chân 5 | RA1 — PORTA I/O / analog input |
| Chân 6 | RA2 — PORTA I/O / analog input |
| Chân 7 | RA3 — PORTA I/O / analog input |
| Chân 8 | RA4 — PORTA I/O / analog input |
| Chân 9 | RA5 — PORTA I/O / analog input |
| Chân 10 | RA6 — PORTA I/O / analog input |
| Chân 11 | RA7 — PORTA I/O / analog input |
| Chân 12 | VSS — Ground |
| Chân 13 | VDD — Positive supply |
| Chân 14 | RB0 — PORTB I/O / interrupt |
| Chân 15 | RB1 — PORTB I/O |
| Chân 16 | RB2 — PORTB I/O |
| Chân 17 | RB3 — PORTB I/O |
| Chân 18 | RB4 — PORTB I/O |
| Chân 19 | RB5 — PORTB I/O |
| Chân 20 | RB6 — PORTB I/O / ICSP clock |
| Chân 21 | RB7 — PORTB I/O / ICSP data |
| Chân 22 | RC0 — PORTC I/O |
| Chân 23 | RC1 — PORTC I/O |
| Chân 24 | RC2 — PORTC I/O |
| Chân 25 | RC3 — PORTC I/O / SCL |
| Chân 26 | RC4 — PORTC I/O / SDA |
| Chân 27 | RC5 — PORTC I/O |
| Chân 28 | RC6 — PORTC I/O / TX |
| Chân 29 | RC7 — PORTC I/O / RX |
| Chân 30 | VSS — Ground |
| Chân 31 | VDD — Positive supply |
| Chân 32 | RD0 — PORTD I/O |
| Chân 33 | RD1 — PORTD I/O |
| Chân 34 | RD2 — PORTD I/O |
| Chân 35 | RD3 — PORTD I/O |
| Chân 36 | RD4 — PORTD I/O |
| Chân 37 | RD5 — PORTD I/O |
| Chân 38 | RD6 — PORTD I/O |
| Chân 39 | RD7 — PORTD I/O |
| Chân 40 | RE0 — PORTE I/O |
| Chân 41 | RE1 — PORTE I/O |
| Chân 42 | RE2 — PORTE I/O |
| Chân 43 | RE3 — PORTE I/O |
| Chân 44 | RE4 — PORTE I/O |
| Chân 45 | RE5 — PORTE I/O |
| Chân 46 | RE6 — PORTE I/O |
| Chân 47 | RE7 — PORTE I/O |
| Chân 48 | VSS — Ground |
| Chân 49 | VDD — Positive supply |
| Chân 50 | RF0 — PORTF I/O / analog |
| Chân 51 | RF1 — PORTF I/O / analog |
| Chân 52 | RF2 — PORTF I/O / analog |
| Chân 53 | RF3 — PORTF I/O / analog |
| Chân 54 | RF4 — PORTF I/O / analog |
| Chân 55 | RF5 — PORTF I/O / analog |
| Chân 56 | RF6 — PORTF I/O / analog |
| Chân 57 | RF7 — PORTF I/O / analog |
| Chân 58 | RG0 — PORTG I/O |
| Chân 59 | RG1 — PORTG I/O |
| Chân 60 | RG2 — PORTG I/O |
| Chân 61 | RG3 — PORTG I/O |
| Chân 62 | RG4 — PORTG I/O |
| Chân 63 | RG5 — PORTG I/O |
| Chân 64 | VSS — Ground |
Ứng dụng tiêu biểu
PIC17C756AT-33/PT phù hợp cho 6 Áp dụngs: Industrial Motor Control, Building Automation Controllers, Instrumentation Front-Ends, Embedded Control Legacy Replacement, POS Terminals and Printers, Security and Access Control Panels.
Industrial Motor Control
The PIC17C756AT-33/PT's 33 MHz clock and 8.25 MIPS throughput give it enough headroom for sensorless and sensored BLDC motor commutation loops that require sub-100 us cycle times. Its on-chip PWM modules, 10-bit ADC, and 50 I/O pins support three-phase inverter control with current sensing, fault inputs, and quadrature encoder feedback on a single MCU. Engineers pair it with IR2101 gate drivers and ACS712 current sensors; the wide 4.5-5.5 V supply tolerates 24 V industrial bus rails after regulation. OTP memory is acceptable for fixed-function industrial controllers where firmware is locked at production.
Được đề xuất
Building Automation Controllers
HVAC and lighting controllers benefit from the PIC17C756AT-33/PT's 50 I/O pins, which can directly drive multiple relay banks, keypad matrices, and triac optocouplers without external I/O expanders. The 33 MHz instruction rate handles Modbus and BACnet protocol stacks over UART while leaving cycles for scheduling logic. Brown-out Detect and Watchdog Timer provide robust operation in noisy building electrical environments. The 32 KB OTP program memory fits typical building automation firmware with comfortable headroom for future feature additions.
Được đề xuất
Instrumentation Front-Ends
The PIC17C756AT-33/PT's 10-bit ADC and 33 MHz throughput make it suitable for low-speed instrumentation such as digital panel meters, bench multimeters, and process signal conditioners. The wide 16-bit program memory bus simplifies lookup-table calibration of sensor nonlinearity, while 902 bytes of RAM hold measurement buffers and display refresh data. Combined with a 4.5-5.5 V supply and external precision references like REF02, designers can achieve 0.1% FS accuracy for industrial process signals without a separate analog processor.
Được đề xuất
Embedded Control Legacy Replacement
The PIC17C756AT-33/PT serves as a long-term replacement for installed-base industrial controllers where original firmware is locked in OTP and cannot be reflashed. With Microchip's last-time-buy notice recommending PIC18F6520, current users can stock PIC17C756AT-33/PT inventory to maintain spare-part availability for years of field service. Pin compatibility with PIC17C756AT-33I/PT (industrial temp) and PIC17C756A-33E/PT (extended temp) simplifies cross-grade spares planning across commercial, industrial, and extended-temperature deployments.
Được đề xuất
POS Terminals and Printers
The PIC17C756AT-33/PT's UART, SPI, and I2C connectivity supports connection to thermal printer heads, keypads, and cash-drawer solenoids in point-of-sale terminals. Its 33 MHz clock encodes receipts and handles bitmap font rendering in real time without external coprocessors. The 50 I/O pins interface with LCD character displays, barcode scanner LEDs, and magnetic-stripe readers; the 32 KB OTP holds multi-language firmware tables. Brown-out and Watchdog Timer features keep unattended kiosks running reliably across power disturbances.
Được đề xuất
Security and Access Control Panels
Access control panels with multi-door supervision benefit from the PIC17C756AT-33/PT's 50 I/O pins to read Wiegand card readers, supervise door strikes, and drive piezo buzzers for alarms. The 10-bit ADC can monitor backup battery voltage for low-battery alerts, and the on-chip UART links to central monitoring stations. OTP memory prevents field tampering with firmware, a security advantage over flash MCUs. Industrial temperature parts (PIC17C756AT-33I/PT) are preferred for outdoor or unconditioned security enclosures.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17C756AT-33/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 | PIC17C756AT-33I/PT | PIC17C756AT-16/PT | PIC17C756A-16I/PT | PIC17C756A-16E/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 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Clock Speed | 33 MHz | 33 MHz | 16 MHz | 16 MHz | 16 MHz | 33 MHz |
| Program Memory | 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 |
| Temperature Grade | Commercial (0C to +70C) | Industrial (-40C to +85C) | Commercial | Industrial | Extended | Extended |
| Packaging Format | Tape & Reel | Tape & Reel | Tube | Tube | Tube | Tube |
| Number of I/O | 50 | 50 | 50 | 50 | 50 | 50 |
| Lifecycle Status | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy |
Bảo phân biệt quan trọng
- Highest throughput in PIC17C family (vsPIC17C756AT-16/PT)
- Tape & Reel packaging for high-volume assembly (vsPIC17C756A-33E/PT)
- True drop-in with no firmware change required (vsPIC18F6520)
Ghi chú thiết kế
The PIC17C756AT-33/PT operates from a single 4.5 V to 5.5 V supply. Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD/VSS pair on the package (typically pins 13, 31, 49 are VDD; pins 12, 30, 48, 64 are VSS). Add a 10 uF bulk tantalum or ceramic capacitor at the board's supply input. The 33 MHz oscillator creates high-frequency switching noise that can corrupt ADC readings if supply impedance is high.
Route the 33 MHz crystal or oscillator traces (OSC1/OSC2, pins 1-2) on the top layer with a guard ground pour on the opposite side and keep trace lengths under 10 mm. Avoid routing digital signals directly under the crystal traces to prevent capacitive coupling. Place the MCLR pull-up (typically 10 kohm) close to the MCLR pin (pin 3). For TQFP-64 layout, use 0.5 mm pitch traces with 0.2 mm/0.2 mm width/spacing to clear the leads.
Do not exceed 5.5 V on any VDD pin - the PIC17C756AT-33/PT has no internal voltage regulator and is sensitive to overvoltage on supply rails. Configure unused I/O pins as outputs (not inputs) to avoid floating-pin supply current. Brown-out Detect must be enabled in configuration bits for reliable operation across power transients. For OTP programming, ensure the EPROM programming voltage timing per the datasheet is followed exactly or the device may lock out further programming attempts.
Thông tin tuân thủ
RoHS and lead-free status not explicitly stated in verified distributor data; Microchip PIC17C family is OTP EPROM-based and predates widespread RoHS conversion. Conflict minerals compliance per Microchip corporate statement.
