PIC17C766T-33I/PT - 33MHz 8-Bit OTP MCU, 32KB EPROM | Microchip
MPN: PIC17C766T-33I/PT ✓ Hoạt độngPIC17C766T-33I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and configurable peripherals around a bus. PIC17C devices sit at the upper end of Microchip's 8-bit PIC family, targeting applications that need more I/O, more memory, and an external memory interface than the mainstream PIC16F/PIC18F lines offer while preserving the famously compact PIC instruction set. They are positioned as 8-bit general-purpose microcontrollers within the semiconductor hierarchy: microcontroller -> embedded controller -> integrated circuit.
Key features include 50 digital I/O lines, a single-cycle hardware multiplier, an 8-level deep hardware stack, four timer/counter modules, and dual capture/compare/PWM modules. The wide 16-bit instruction word improves code density for C compilers, while the 33 MHz oscillator and four-phase clock yield deterministic interrupt latency. Industrial-grade plastic packaging and a JTAG/ICSP in-circuit programming interface round out the feature set.
Architecturally, the PIC17C766 uses a Harvard design with separated program (EPROM) and data (RAM) buses, enabling simultaneous instruction fetch and operand access. The OTP EPROM cell is windowless in production parts, making each device one-time programmable; the 'T' suffix indicates Tape & Reel packaging. Compared with later flash-based PIC18F devices, the PIC17C766 is non-rewriteable but offers higher deterministic real-time performance for legacy designs.
Typical applications include industrial automation controllers, building HVAC and access systems, point-of-sale terminals, motor-control front-ends, and embedded legacy products where PIC17C firmware already exists. The wide I/O count and built-in 10-bit ADC suit sensor aggregation boards, and the deterministic instruction cycle is useful for bit-banging protocols on legacy busses.
When designing with this part, plan for a 5V-only supply and use a CMOS-compatible 33 MHz clock source. Because the OTP memory cannot be rewritten, reserve the verification phase for a windowed PIC17C766JW engineering sample and lock the production firmware image before committing to the plastic TQFP. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the bare manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC17C766T-33I/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 PIC17C766T-33I/PT (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Operating Temperature, Program Memory Size, Data Bus Width.
PIC17C766-33I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C756A-33I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C766T-33/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C762-33I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C752-33/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C766T-33I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit (PIC17C family) |
| Tần số xung maksimum | 33 MHz |
| Instruction Cycle | 121 ns (8.25 MIPS) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 32 KB (16K x 16) |
| Data RAM | 902 bytes |
| Data EEPROM | Not present (EPROM-based MCU) |
| ADC | 10-bit, 16 channels |
| I/O Pins | 50 |
| Điện áp cung cấp | 4.5 V to 5.5 V |
| Communication Peripherals | I2C, SPI, UART/USART |
| Timers | 4 x 8/16-bit timer/counter |
| CCP Modules | 2 capture/compare/PWM |
| Hardware Multiplier | 8 x 8 single-cycle |
| Nhiệt độ hoạt động | -40C to +85C (industrial, 'I' suffix) |
| Hộp | 80-TQFP (12x12 mm) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel ('T' suffix) |
| Instruction Set | 58 single-word instructions |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC17C766T-33I/PT
| Chân 1 | OSC1 — Oscillator input / external clock |
| Chân 2 | RA0/AN0 — GPIO RA0 / analog channel 0 |
| Chân 3 | RA1/AN1 — GPIO RA1 / analog channel 1 |
| Chân 4 | RA2/AN2 — GPIO RA2 / analog channel 2 |
| Chân 5 | RA3/AN3 — GPIO RA3 / analog channel 3 |
| Chân 6 | RA4/AN4 — GPIO RA4 / analog channel 4 |
| Chân 7 | RA5/AN5 — GPIO RA5 / analog channel 5 |
| Chân 8 | RA6/AN6 — GPIO RA6 / analog channel 6 |
| Chân 9 | RA7/AN7 — GPIO RA7 / analog channel 7 |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VDD — Positive supply 4.5-5.5 V |
| Chân 12 | RB0/INT0 — GPIO RB0 / external interrupt 0 |
| Chân 13 | RB1/INT1 — GPIO RB1 / external interrupt 1 |
| Chân 14 | RB2 — GPIO RB2 |
| Chân 15 | RB3 — GPIO RB3 |
| Chân 16 | RB4 — GPIO RB4 |
| Chân 17 | RB5 — GPIO RB5 |
| Chân 18 | RB6/PGC — GPIO RB6 / ICSP clock |
| Chân 19 | RB7/PGD — GPIO RB7 / ICSP data |
| Chân 20 | VSS — Ground reference |
| Chân 21 | VDD — Positive supply 4.5-5.5 V |
| Chân 22 | RC0 — GPIO RC0 |
| Chân 23 | RC1 — GPIO RC1 |
| Chân 24 | RC2 — GPIO RC2 |
| Chân 25 | RC3 — GPIO RC3 |
| Chân 26 | RC4 — GPIO RC4 |
| Chân 27 | RC5 — GPIO RC5 |
| Chân 28 | RC6 — GPIO RC6 |
| Chân 29 | RC7 — GPIO RC7 |
| Chân 30 | VSS — Ground reference |
| Chân 31 | VDD — Positive supply 4.5-5.5 V |
| Chân 32 | RD0 — GPIO RD0 |
| Chân 33 | RD1 — GPIO RD1 |
| Chân 34 | RD2 — GPIO RD2 |
| Chân 35 | RD3 — GPIO RD3 |
| Chân 36 | RD4 — GPIO RD4 |
| Chân 37 | RD5 — GPIO RD5 |
| Chân 38 | RD6 — GPIO RD6 |
| Chân 39 | RD7 — GPIO RD7 |
| Chân 40 | VSS — Ground reference |
| Chân 41 | VDD — Positive supply 4.5-5.5 V |
| Chân 42 | RE0 — GPIO RE0 |
| Chân 43 | RE1 — GPIO RE1 |
| Chân 44 | RE2 — GPIO RE2 |
| Chân 45 | RE3 — GPIO RE3 |
| Chân 46 | RE4 — GPIO RE4 |
| Chân 47 | RE5 — GPIO RE5 |
| Chân 48 | RE6 — GPIO RE6 |
| Chân 49 | RE7 — GPIO RE7 |
| Chân 50 | VSS — Ground reference |
| Chân 51 | VDD — Positive supply 4.5-5.5 V |
| Chân 52 | RF0/AN8 — GPIO RF0 / analog channel 8 |
| Chân 53 | RF1/AN9 — GPIO RF1 / analog channel 9 |
| Chân 54 | RF2/AN10 — GPIO RF2 / analog channel 10 |
| Chân 55 | RF3/AN11 — GPIO RF3 / analog channel 11 |
| Chân 56 | RF4/AN12 — GPIO RF4 / analog channel 12 |
| Chân 57 | RF5/AN13 — GPIO RF5 / analog channel 13 |
| Chân 58 | RF6/AN14 — GPIO RF6 / analog channel 14 |
| Chân 59 | RF7/AN15 — GPIO RF7 / analog channel 15 |
| Chân 60 | VSS — Ground reference |
| Chân 61 | VDD — Positive supply 4.5-5.5 V |
| Chân 62 | RG0 — GPIO RG0 |
| Chân 63 | RG1 — GPIO RG1 |
| Chân 64 | RG2 — GPIO RG2 |
| Chân 65 | RG3 — GPIO RG3 |
| Chân 66 | RG4 — GPIO RG4 |
| Chân 67 | RG5 — GPIO RG5 |
| Chân 68 | RH0 — GPIO RH0 |
| Chân 69 | RH1 — GPIO RH1 |
| Chân 70 | RH2 — GPIO RH2 |
| Chân 71 | RH3 — GPIO RH3 |
| Chân 72 | VSS — Ground reference |
| Chân 73 | VDD — Positive supply 4.5-5.5 V |
| Chân 74 | AVSS — Analog ground |
| Chân 75 | AVDD — Analog supply 4.5-5.5 V |
| Chân 76 | VREF- — ADC negative reference |
| Chân 77 | VREF+ — ADC positive reference |
| Chân 78 | MCLR/VPP — Master clear / programming voltage |
| Chân 79 | OSC2 — Oscillator output |
| Chân 80 | T0CKI — Timer0 clock input |
Ứng dụng tiêu biểu
PIC17C766T-33I/PT phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, HVAC and Building Access Systems, Point-of-Sale Terminals, Motor-Control Front-Ends, Legacy Embedded Sensor Aggregation, Industrial Test and Measurement Fixtures.
Industrial Automation Controllers
The PIC17C766T-33I/PT fits industrial automation controllers thanks to its 33 MHz core delivering 8.25 MIPS deterministic throughput, 50 GPIO pins for parallel sensor/actuator I/O, and 16-channel 10-bit ADC for analog feedback loops. Its OTP EPROM program memory ensures that locked firmware cannot be reverse-engineered via flash dump attacks, suiting factory-floor PLC and HMI panels. Placed on the controller board as the central MCU, it scans digital inputs at deterministic intervals while running PID control loops on motor drivers; the wide TQFP footprint eases thermal dissipation at sustained 33 MHz. Companion parts: PIC17C756A-33I/PT (drop-in variant), PIC18F8520 (next-gen migration path).
Được đề xuất
HVAC and Building Access Systems
The PIC17C766T-33I/PT is well suited to HVAC control boards and building access systems because of its 902-byte RAM supporting modest zone-state buffers, its 4.5-5.5V supply tolerant of legacy 5V bus electronics, and its UART/SPI/I2C peripherals for inter-board communications. The wide 80-pin TQFP provides ample GPIO for keypad matrices, relay drivers, and card-reader interfaces. In a typical HVAC controller the PIC17C766T-33I/PT sits between the thermostat inputs and the blower/valve drivers, executing closed-loop temperature control at deterministic 121 ns cycles. Companion parts: PIC17C756A-33I/PT (variant), PIC16LF877A-I/PT (lower-cost sibling).
Được đề xuất
Point-of-Sale Terminals
Point-of-sale terminals benefit from the PIC17C766T-33I/PT's 33 MHz core for fast keypad/display scan rates, its 32 KB program memory holding multi-currency firmware tables, and its 10-bit ADC for battery and supply-rail monitoring. The OTP EPROM cell keeps pricing tables and tax logic tamper-resistant in retail environments. Inside a POS terminal the PIC17C766T-33I/PT serves as the human-interface controller, scanning keypads and refreshing character displays while delegating card-reader encryption to a secure companion IC. Companion parts: PIC17C766T-33/PT (commercial temp grade), PIC16LF877A-I/PT (co-MCU).
Được đề xuất
Motor-Control Front-Ends
The PIC17C766T-33I/PT suits motor-control front-ends because of its dual capture/compare/PWM modules that drive half-bridges or three-phase bridges, its 16-channel 10-bit ADC that samples shunt currents and back-EMF, and its deterministic 121 ns instruction cycle that keeps PWM jitter under one percent. The 902-byte RAM supports field-weakening and sensorless control lookup tables. The MCU sits on the power-stage PCB as the gate-driver sequencer, generating complementary PWM and executing FOC algorithms; the wide TQFP-80 footprint tolerates the thermal rise of switching power stages nearby. Companion parts: PIC17C756A-33I/PT, dsPIC33EP64MC504-E/MV (DSP migration).
Được đề xuất
Legacy Embedded Sensor Aggregation
The PIC17C766T-33I/PT is a strong fit for legacy sensor aggregation nodes where PIC17C firmware already exists and the 50-pin GPIO and 16-channel ADC are needed. Its 33 MHz core aggregates 4-20 mA loops, thermocouples, and digital switches into a single UART or SPI stream for the upstream gateway. Unlike a modern ARM Cortex-M0, the PIC17C766T-33I/PT preserves the existing PIC17C toolchain and pin-compatible layouts, allowing field retrofits without revalidation. The OTP memory ensures that security-sensitive firmware cannot be cloned via flash readout. Companion parts: PIC17C762-33I/PT (lower-cost variant), PIC16LF877A-I/PT (compact sibling).
Được đề xuất
Industrial Test and Measurement Fixtures
The PIC17C766T-33I/PT serves well in industrial test and measurement fixtures where deterministic bit-banging of legacy busses is required. Its 121 ns instruction cycle allows tightly timed GPIB, I2C, or SPI transactions without RTOS overhead, and its 50 GPIO lines drive front-panel switches, LEDs, and relays. The 10-bit ADC provides local analog stimulus monitoring on the test fixture itself. The MCU sits inside the ATE rack as the fixture controller; its OTP EPROM locks test sequences so proprietary procedures cannot be copied. Companion parts: PIC17C766-33I/PT (Tray variant), PIC17C752-33E/PT (smaller-memory variant).
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17C766T-33I/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 | PIC17C766-33I/PT | PIC17C756A-33I/PT | PIC17C766T-33/PT | PIC17C762-33I/PT | PIC17C752-33/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-TQFP (12x12 mm) | 80-TQFP - same | 80-TQFP - same | 80-TQFP - same | 80-TQFP - same | 80-TQFP - same |
| Program Memory | 32 KB OTP EPROM | 32 KB OTP - identical | 32 KB OTP - identical | 32 KB OTP - identical | 16 KB OTP (-50%) | 16 KB OTP (-50%) |
| Maximum Clock | 33 MHz | 33 MHz - identical | 33 MHz - identical | 33 MHz - identical | 33 MHz - identical | 33 MHz - identical |
| Data RAM | 902 bytes | 902 bytes - identical | 902 bytes - identical | 902 bytes - identical | 454 bytes (-50%) | 454 bytes (-50%) |
| ADC | 10-bit, 16 channels | 10-bit, 16 channels - identical | 10-bit, 12 channels (-25%) | 10-bit, 16 channels - identical | 10-bit, 12 channels (-25%) | 10-bit, 12 channels (-25%) |
| I/O Pins | 50 | 50 - identical | 50 - identical | 50 - identical | 50 - identical | 44 (-12%) |
| Supply Voltage | 4.5 V to 5.5 V | 4.5-5.5 V - identical | 4.5-5.5 V - identical | 4.5-5.5 V - identical | 4.5-5.5 V - identical | 4.5-5.5 V - identical |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C - identical | -40C to +85C - identical | 0C to +70C (commercial) | -40C to +85C - identical | 0C to +70C (commercial) |
| Packaging | Tape & Reel | Tray | Tray | Tape & Reel | Tray | Tray |
Bảo phân biệt quan trọng
- Tape & Reel factory-direct packaging for high-volume lines (vsPIC17C766-33I/PT)
- Largest PIC17C OTP memory and RAM (vsPIC17C756A-33I/PT)
- Industrial -40C to +85C temperature grade (vsPIC17C766T-33/PT)
Ghi chú thiết kế
The PIC17C766T-33I/PT requires a tightly regulated 4.5 V to 5.5 V supply because the OTP EPROM programming algorithm depends on stable VDD within 5 percent. Decouple VDD with a 100 nF ceramic placed within 5 mm of each VDD/VSS pair; place a 10 uF bulk tantalum at the regulator output to absorb the 33 MHz clock harmonics. Adding a 100 ohm ferrite bead between the analog AVDD and digital VDD rails prevents ADC reference corruption during CCP switching events.
The 80-TQFP (12x12 mm, 0.5 mm pitch) demands 4-layer routing with continuous ground planes under the package to control EMI from the 33 MHz clock traces. Keep the OSC1/OSC2 traces shorter than 10 mm and shield them with a ground guard ring. The exposed thermal pad (where present on the silicon die) must be soldered to a 10x10 mm copper pour stitched with 0.3 mm thermal vias to the inner ground plane to keep junction temperature below 70 C at industrial ambient.
Do not assume that PIC17C firmware will run on PIC18F silicon - the instruction set, stack depth, and register layout differ. Also, do not program the OTP EPROM without first verifying firmware on a windowed PIC17C766JW engineering sample, because plastic TQFP parts cannot be erased. Finally, ensure MCLR/VPP (pin 78) is held low during power-up ramp until VDD crosses 4.5 V to prevent spurious resets that can corrupt the EPROM programming algorithm.
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified - this is a general-purpose MCU, not an automotive-grade part. Halogen-free status not explicitly listed in the provided data; verify with the manufacturer if required.
