PIC17C766-33/PT - 8-Bit 33MHz OTP MCU, 32KB | Microchip
料号： PIC17C766-33/PT ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $17.07 | $17.07 |
| 10 | $15.36 | $153.60 |
| 100 | $13.65 | $1,365.00 |
| 500 | $12.08 | $6,040.00 |
| 1,000 | $10.79 | $10,790.00 |
PIC17C766-33/PT 概述
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.
直接替换替代料： PIC17C766-33/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： PIC17C766-33/PT （相同外形与封装尺寸） ——差异在于 Package, I/O Pins, Data Bus Width, ADC, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
PIC17C766-16I/PT
✅ 直接替换✓ 有现货
$11.5 / 个
查看数据手册 →PIC17C766-16E/PT
✅ 直接替换✓ 有现货
$9.95 / 个
查看数据手册 →PIC17C762-33I/PT
✅ 直接替换✓ 有现货
$4.85 / 个
查看数据手册 →PIC17C762-16I/PT
✅ 直接替换✓ 有现货
$10.05 / 个
查看数据手册 →PIC17C756AT-33E/PT
✅ 直接替换✓ 有现货
$10.36 / 个
查看数据手册 →PIC17C766-33/PT 最大额定值与电气特性
| Manufacturer | Microchip Technology |
| Product Family | PIC17C |
| Architecture | 8-bit Harvard RISC, 16-bit instruction word |
| Core | PIC |
| 最大时钟频率 | 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 |
| 数据总线宽度 | 16-bit (instruction), 8-bit (data path) |
| 电源电压 | 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 |
| 工作温度范围 | 0C to +70C (commercial) |
| 封装 | 80-TQFP (12x12 mm) |
| 安装类型 | Surface Mount |
| Temperature Grade | Commercial |
| Lead-Free / RoHS Status | Compliant per distributor listing |
PIC17C766-33/PT 引脚配置
| 引脚 1 | OSC1 — Crystal/oscillator input |
| 引脚 2 | OSC2 — Crystal/oscillator output |
| 引脚 3 | MCLR — Master clear (reset) input |
| 引脚 4 | RA0 — PORTA bit 0 / analog |
| 引脚 5 | RA1 — PORTA bit 1 / analog |
| 引脚 6 | RA2 — PORTA bit 2 / analog |
| 引脚 7 | RA3 — PORTA bit 3 / analog |
| 引脚 8 | RA4 — PORTA bit 4 |
| 引脚 9 | RA5 — PORTA bit 5 |
| 引脚 10 | VSS — Ground |
| 引脚 11 | VDD — Positive supply |
| 引脚 12 | RB0 — PORTB bit 0 / analog |
| 引脚 13 | RB1 — PORTB bit 1 / analog |
| 引脚 14 | RB2 — PORTB bit 2 / analog |
| 引脚 15 | RB3 — PORTB bit 3 / analog |
| 引脚 16 | RB4 — PORTB bit 4 / analog |
| 引脚 17 | RB5 — PORTB bit 5 / analog |
| 引脚 18 | RB6 — PORTB bit 6 / analog |
| 引脚 19 | RB7 — PORTB bit 7 / analog |
| 引脚 20 | VSS — Ground |
| 引脚 21 | VDD — Positive supply |
| 引脚 22 | RC0 — PORTC bit 0 |
| 引脚 23 | RC1 — PORTC bit 1 |
| 引脚 24 | RC2 — PORTC bit 2 |
| 引脚 25 | RC3 — PORTC bit 3 |
| 引脚 26 | RC4 — PORTC bit 4 |
| 引脚 27 | RC5 — PORTC bit 5 |
| 引脚 28 | RC6 — PORTC bit 6 |
| 引脚 29 | RC7 — PORTC bit 7 |
| 引脚 30 | VSS — Ground |
| 引脚 31 | VDD — Positive supply |
| 引脚 32 | RD0 — PORTD bit 0 |
| 引脚 33 | RD1 — PORTD bit 1 |
| 引脚 34 | RD2 — PORTD bit 2 |
| 引脚 35 | RD3 — PORTD bit 3 |
| 引脚 36 | RD4 — PORTD bit 4 |
| 引脚 37 | RD5 — PORTD bit 5 |
| 引脚 38 | RD6 — PORTD bit 6 |
| 引脚 39 | RD7 — PORTD bit 7 |
| 引脚 40 | VSS — Ground |
| 引脚 41 | VDD — Positive supply |
| 引脚 42 | RE0 — PORTE bit 0 / analog |
| 引脚 43 | RE1 — PORTE bit 1 / analog |
| 引脚 44 | RE2 — PORTE bit 2 / analog |
| 引脚 45 | RE3 — PORTE bit 3 / analog |
| 引脚 46 | RE4 — PORTE bit 4 / analog |
| 引脚 47 | RE5 — PORTE bit 5 / analog |
| 引脚 48 | RE6 — PORTE bit 6 / analog |
| 引脚 49 | RE7 — PORTE bit 7 / analog |
| 引脚 50 | VSS — Ground |
| 引脚 51 | VDD — Positive supply |
| 引脚 52 | RF0 — PORTF bit 0 / analog |
| 引脚 53 | RF1 — PORTF bit 1 / analog |
| 引脚 54 | RF2 — PORTF bit 2 / analog |
| 引脚 55 | RF3 — PORTF bit 3 / analog |
| 引脚 56 | RF4 — PORTF bit 4 / analog |
| 引脚 57 | RF5 — PORTF bit 5 / analog |
| 引脚 58 | RF6 — PORTF bit 6 / analog |
| 引脚 59 | RF7 — PORTF bit 7 / analog |
| 引脚 60 | VSS — Ground |
| 引脚 61 | VDD — Positive supply |
| 引脚 62 | RG0 — PORTG bit 0 |
| 引脚 63 | RG1 — PORTG bit 1 |
| 引脚 64 | RG2 — PORTG bit 2 |
| 引脚 65 | RG3 — PORTG bit 3 |
| 引脚 66 | RG4 — PORTG bit 4 |
| 引脚 67 | SCK/SCL — SSP clock (SPI/I2C) |
| 引脚 68 | SDI/SDA — SSP data (SPI/I2C) |
| 引脚 69 | SDO — SSP data out (SPI) |
| 引脚 70 | SS — SSP slave select |
| 引脚 71 | TX1 — USART1 transmit |
| 引脚 72 | RX1 — USART1 receive |
| 引脚 73 | TX2 — USART2 transmit |
| 引脚 74 | RX2 — USART2 receive |
| 引脚 75 | CCP1 — Capture/Compare/PWM 1 |
| 引脚 76 | CCP2 — Capture/Compare/PWM 2 |
| 引脚 77 | CCP3 — Capture/Compare/PWM 3 |
| 引脚 78 | T0CKI — Timer0 clock input |
| 引脚 79 | INT — External interrupt |
| 引脚 80 | NC — Not connected (per datasheet) |
典型应用
PIC17C766-33/PT 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： PIC17C766-33/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 | 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 |
关键差异点
- Highest program memory in the PIC17C family at 33 MHz （对比 PIC17C762-33I/PT)
- Maximum throughput at 33 MHz with deterministic single-cycle execution （对比 PIC17C766-16I/PT)
- 16-channel 10-bit ADC integrated with 50 I/O lines （对比 PIC17C756AT-33E/PT)
设计说明
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.
合规信息
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.
