PIC17C766-33/PT - 8-Bit 33MHz OTP MCU, 32KB | Microchip
MPN: PIC17C766-33/PT ✗ Cuối đờiPIC17C766-33/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that contains a CPU core, non-volatile program memory, working RAM, and configurable peripherals. The PIC17C family is Microchip's original high-end 8-bit architecture, sitting above the PIC16C5X and PIC16CXX families in performance and addressing capability, and is upwards compatible with their instruction sets. Within the broader taxonomy, the PIC17C766 is an EPROM/OTP microcontroller belonging to the 8-bit RISC microcontroller class, which falls under microcontrollers -> integrated circuits -> semiconductors.
Key features include a single-cycle hardware multiplier, four capture inputs, three PWM outputs, an external memory interface, and a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C. The device also integrates two USARTs for asynchronous or synchronous communication, eight timer/counter modules, a programmable brown-out reset, and a watchdog timer with its own on-chip RC oscillator. The 80-pin TQFP package provides commercial-grade (0C to +70C) operation and supports in-system programming through the standard PIC ICSP interface.
Architecturally, the PIC17C766 uses a Harvard RISC design with a 16-bit instruction word and an 8-bit data path, which is the source of the often-cited '16-bit instruction, 8-bit data' labeling seen in datasheet snippets. The 33 MHz oscillator drives a four-phase internal clock that produces the 121 ns single-cycle instruction time, except for program branches and table reads/writes which take two cycles. This pipelined design gives the family its deterministic real-time behavior, which is a defining reason designers select it over CISC 8-bit parts.
Typical applications include industrial automation controllers, motor control systems, building automation, instrumentation with analog front-ends, and embedded communication gateways. The 10-bit ADC with 16 input channels makes the part well-suited to multi-sensor data acquisition boards, while the dual USART and SPI/I2C peripherals support bridging between local sensor networks and external controllers. The OTP memory is appropriate for production-volume designs where the firmware is finalized before mask ROM or flash migration to PIC18F or dsPIC equivalents.
When designing with this device, engineers should verify the 4.5V to 5.5V supply tolerance against any 3.3V peripherals, place a 0.1 uF decoupling capacitor close to each supply pin, and ensure the 33 MHz crystal or oscillator meets the AC electrical characteristics in the datasheet. New designs are encouraged to migrate to the recommended successor (PIC18F8520 per Microchip's product page) where possible, since the PIC17C family is no longer in active production. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC17C766-33/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 PIC17C766-33/PT (cùng hình factor và footprint) — khác nhau ở Package, I/O Pins, Data Bus Width, ADC, RoHS Status.
PIC17C766-16I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C766-16E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C762-33I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C762-16I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C756AT-33E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C766-33/PT Tỷ lệ tối đa & tính chất điện
| Manufacturer | Microchip Technology |
| Product Family | PIC17C |
| Architecture | 8-bit Harvard RISC, 16-bit instruction word |
| Core | PIC |
| Tần số xung maksimum | 33 MHz |
| Instruction Cycle Time | 121 ns (single cycle) |
| Program Memory Type | OTP (One-Time-Programmable EPROM) |
| Program Memory Size | 32 KB (16K x 16) |
| RAM Size | 902 bytes |
| Bề rộng đường dữ liệu | 16-bit (instruction), 8-bit (data path) |
| Điện áp cung cấp | 4.5 V to 5.5 V |
| I/O Pins | 50 |
| ADC | 10-bit, 16 channels |
| Capture / Compare / PWM | 4 capture, 3 PWM |
| Timers | 8 timer/counter modules |
| Serial Interfaces | 1x SPI/I2C (SSP), 2x USART (SCI) |
| Hardware Multiplier | Yes, single-cycle 8x8 |
| Khoảng nhiệt độ hoạt động | 0C to +70C (commercial) |
| Hộp | 80-TQFP (12x12 mm) |
| Kiểu lắp đặt | Surface Mount |
| Temperature Grade | Commercial |
| Lead-Free / RoHS Status | Compliant per distributor listing |
Cấu hình chân PIC17C766-33/PT
| Chân 1 | OSC1 — Crystal/oscillator input |
| Chân 2 | OSC2 — Crystal/oscillator output |
| Chân 3 | MCLR — Master clear (reset) input |
| Chân 4 | RA0 — PORTA bit 0 / analog |
| Chân 5 | RA1 — PORTA bit 1 / analog |
| Chân 6 | RA2 — PORTA bit 2 / analog |
| Chân 7 | RA3 — PORTA bit 3 / analog |
| Chân 8 | RA4 — PORTA bit 4 |
| Chân 9 | RA5 — PORTA bit 5 |
| Chân 10 | VSS — Ground |
| Chân 11 | VDD — Positive supply |
| Chân 12 | RB0 — PORTB bit 0 / analog |
| Chân 13 | RB1 — PORTB bit 1 / analog |
| Chân 14 | RB2 — PORTB bit 2 / analog |
| Chân 15 | RB3 — PORTB bit 3 / analog |
| Chân 16 | RB4 — PORTB bit 4 / analog |
| Chân 17 | RB5 — PORTB bit 5 / analog |
| Chân 18 | RB6 — PORTB bit 6 / analog |
| Chân 19 | RB7 — PORTB bit 7 / analog |
| Chân 20 | VSS — Ground |
| Chân 21 | VDD — Positive supply |
| Chân 22 | RC0 — PORTC bit 0 |
| Chân 23 | RC1 — PORTC bit 1 |
| Chân 24 | RC2 — PORTC bit 2 |
| Chân 25 | RC3 — PORTC bit 3 |
| Chân 26 | RC4 — PORTC bit 4 |
| Chân 27 | RC5 — PORTC bit 5 |
| Chân 28 | RC6 — PORTC bit 6 |
| Chân 29 | RC7 — PORTC bit 7 |
| Chân 30 | VSS — Ground |
| Chân 31 | VDD — Positive supply |
| Chân 32 | RD0 — PORTD bit 0 |
| Chân 33 | RD1 — PORTD bit 1 |
| Chân 34 | RD2 — PORTD bit 2 |
| Chân 35 | RD3 — PORTD bit 3 |
| Chân 36 | RD4 — PORTD bit 4 |
| Chân 37 | RD5 — PORTD bit 5 |
| Chân 38 | RD6 — PORTD bit 6 |
| Chân 39 | RD7 — PORTD bit 7 |
| Chân 40 | VSS — Ground |
| Chân 41 | VDD — Positive supply |
| Chân 42 | RE0 — PORTE bit 0 / analog |
| Chân 43 | RE1 — PORTE bit 1 / analog |
| Chân 44 | RE2 — PORTE bit 2 / analog |
| Chân 45 | RE3 — PORTE bit 3 / analog |
| Chân 46 | RE4 — PORTE bit 4 / analog |
| Chân 47 | RE5 — PORTE bit 5 / analog |
| Chân 48 | RE6 — PORTE bit 6 / analog |
| Chân 49 | RE7 — PORTE bit 7 / analog |
| Chân 50 | VSS — Ground |
| Chân 51 | VDD — Positive supply |
| Chân 52 | RF0 — PORTF bit 0 / analog |
| Chân 53 | RF1 — PORTF bit 1 / analog |
| Chân 54 | RF2 — PORTF bit 2 / analog |
| Chân 55 | RF3 — PORTF bit 3 / analog |
| Chân 56 | RF4 — PORTF bit 4 / analog |
| Chân 57 | RF5 — PORTF bit 5 / analog |
| Chân 58 | RF6 — PORTF bit 6 / analog |
| Chân 59 | RF7 — PORTF bit 7 / analog |
| Chân 60 | VSS — Ground |
| Chân 61 | VDD — Positive supply |
| Chân 62 | RG0 — PORTG bit 0 |
| Chân 63 | RG1 — PORTG bit 1 |
| Chân 64 | RG2 — PORTG bit 2 |
| Chân 65 | RG3 — PORTG bit 3 |
| Chân 66 | RG4 — PORTG bit 4 |
| Chân 67 | SCK/SCL — SSP clock (SPI/I2C) |
| Chân 68 | SDI/SDA — SSP data (SPI/I2C) |
| Chân 69 | SDO — SSP data out (SPI) |
| Chân 70 | SS — SSP slave select |
| Chân 71 | TX1 — USART1 transmit |
| Chân 72 | RX1 — USART1 receive |
| Chân 73 | TX2 — USART2 transmit |
| Chân 74 | RX2 — USART2 receive |
| Chân 75 | CCP1 — Capture/Compare/PWM 1 |
| Chân 76 | CCP2 — Capture/Compare/PWM 2 |
| Chân 77 | CCP3 — Capture/Compare/PWM 3 |
| Chân 78 | T0CKI — Timer0 clock input |
| Chân 79 | INT — External interrupt |
| Chân 80 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC17C766-33/PT phù hợp cho 6 Áp dụngs: Industrial Automation Controller, Motor Control and PWM Drive, Multi-Channel Data Acquisition, Embedded Communication Gateway, Building Automation and HVAC Control, Test and Measurement Instrumentation.
Industrial Automation Controller
The PIC17C766-33/PT fits industrial automation controllers because its 33 MHz clock, 121 ns single-cycle instruction time, and 8.25 MIPS deterministic throughput allow precise timing of motor, valve, and sensor events. The 16-channel 10-bit ADC reads multiple analog sensors (pressure, flow, temperature) in parallel without external muxes, while the 50 I/O lines drive discrete outputs and read switch states. The 80-TQFP package is surface-mountable on industrial PCBs, and the synchronous serial port (SPI/I2C) plus dual USARTs bridge local sensors to higher-level controllers or HMIs. Designers rely on the PIC17C766-33/PT's brown-out reset and watchdog timer for unattended factory operation.
Được đề xuất
Motor Control and PWM Drive
The PIC17C766-33/PT's three PWM outputs and four capture inputs make it well-suited to brushless DC or stepper motor control loops. At 33 MHz, the 121 ns instruction cycle supports high-resolution PWM timing for smooth torque control, while the capture inputs time external Hall-sensor or encoder edges. The single-cycle 8x8 hardware multiplier accelerates PI loop math without burdening the main execution pipeline. The 32 KB OTP holds a complete field-oriented control or trapezoidal commutation routine. For three-phase applications, the 50 I/O lines distribute to phase drivers, fault inputs, and current-sense amplifiers.
Được đề xuất
Multi-Channel Data Acquisition
The PIC17C766-33/PT integrates a 16-channel 10-bit ADC and 902 bytes of RAM, which is enough to buffer moderate-rate multi-sensor sampling for instrumentation and data acquisition boards. The dual USARTs and SPI/I2C peripheral offload data to external ADCs, displays, or communication modules. At 33 MHz, the CPU can service ADC end-of-conversion interrupts and run scaling math without losing samples. The 80-TQFP exposes enough analog-capable pins to map sensors directly to ADC channels, reducing external multiplexing. The OTP memory is appropriate for production-volume instruments where firmware is finalized before tooling.
Được đề xuất
Embedded Communication Gateway
The PIC17C766-33/PT's dual USART and configurable SSP (SPI/I2C) make it a natural gateway between field sensors and a host controller or modem. The 32 KB OTP holds protocol stacks for Modbus RTU, simple proprietary framing, or sensor-bus bridging, while the 121 ns instruction cycle keeps latency low for polled industrial protocols. The 50 I/O lines carry RS-232/485 transceivers, status LEDs, and discrete sensor inputs. The 80-TQFP footprint suits DIN-rail gateway PCBs with isolation barriers. Brown-out and watchdog support unattended operation in remote cabinets.
Được đề xuất
Building Automation and HVAC Control
The PIC17C766-33/PT fits building automation controllers where deterministic timing and rich I/O are required to drive damper actuators, read thermostats, and log runtime statistics. The 10-bit 16-channel ADC reads multiple temperature and humidity transducers directly, and the dual USARTs connect to BACnet or Modbus networks. With 902 bytes of RAM, the part holds a small scheduling and trending buffer; with 32 KB of OTP, the part stores the full control algorithm in production. The 80-TQFP mounts to standard building-automation controller boards with external relays and triac drivers.
Được đề xuất
Test and Measurement Instrumentation
The PIC17C766-33/PT's 33 MHz throughput, 16-channel ADC, and 50 I/O lines are valuable in bench instruments such as data loggers, scanner controllers, and calibration fixtures. The single-cycle hardware multiplier accelerates RMS and statistical calculations, while the USARTs expose RS-232/485 for instrument communication. The OTP memory ensures the calibration and test firmware is locked at production. The 80-TQFP footprint is well-suited to multi-layer test-instrument PCBs. Where program field updates are needed, designers migrate to the flash-based PIC18F8520 recommended by Microchip.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17C766-33/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 | PIC17C766-16I/PT | PIC17C766-16E/PT | PIC17C762-33I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same |
| Maximum Clock Frequency | 33 MHz | 16 MHz | 16 MHz | 33 MHz |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Operating Temperature | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +125C (extended) | -40C to +85C (industrial) |
| ADC | 10-bit, 16 channels | 10-bit, 16 channels | 10-bit, 16 channels | 10-bit, fewer channels |
Bảo phân biệt quan trọng
- Highest program memory in the PIC17C family at 33 MHz (vsPIC17C762-33I/PT)
- Maximum throughput at 33 MHz with deterministic single-cycle execution (vsPIC17C766-16I/PT)
- 16-channel 10-bit ADC integrated with 50 I/O lines (vsPIC17C756AT-33E/PT)
Ghi chú thiết kế
Estimated: at 33 MHz with all peripherals active, the PIC17C766-33/PT typically draws 30-50 mA from a 5.0 V supply. Place a 0.1 uF ceramic decoupling capacitor as close as possible to each VDD/VSS pair (there are multiple pairs across the 80-TQFP), and add a bulk 10 uF tantalum or aluminum capacitor near the supply entry. The brown-out reset circuit must see a stable VDD before MCLR is released.
The 80-TQFP (12x12 mm) has a 0.5 mm pitch. Use 4-layer PCB with a continuous ground plane under the part to reduce EMI from the 33 MHz oscillator and PWM outputs. Route the oscillator traces to OSC1/OSC2 with short, guarded traces and place the crystal within 5 mm of the pins. Keep analog traces (ADC inputs) away from PWM and USART switching lines to preserve ADC accuracy.
The '33' suffix indicates the maximum 33 MHz clock speed, not the supply voltage. Do not exceed 5.5 V on VDD. The OTP memory is one-time programmable - verify the firmware in flash-equivalent prototypes (e.g., PIC17C766 emulator or PIC18F8520 with equivalent firmware) before committing. The 902-byte RAM is shared between variables and the call stack; deep recursion can overflow the stack in this architecture.
Thông tin tuân thủ
RoHS and lead-free compliance per Microchip product listing; REACH, halogen-free, and conflict-mineral declarations were not explicitly listed in the verified data and are marked unknown.
