PIC17C762-33I/PT - 8-bit OTP MCU, 33MHz, 16KB EPROM | Microchip
MPN: PIC17C762-33I/PT ✗ Cuối đờiPIC17C762-33I/PT Tóm tắt
What is a PIC17C-series microcontroller? The PIC17C family is Microchip's original high-end 8-bit MCU line, built around a 16-bit instruction word and 8-bit data bus. It sits in the hierarchy: microcontroller -> embedded controller -> semiconductor IC. The 'C' suffix denotes EPROM (one-time-programmable) program memory, which was later superseded by Flash-based PIC18F equivalents. PIC17C parts include a hardware multiply engine, multi-source interrupt controller, and 10-bit ADC peripherals, positioning them between classic PIC16 mid-range MCUs and the later 16-bit PIC24/dsPIC families.
Key features of the PIC17C762-33I/PT include 50 digital I/O pins arranged across multiple ports, a 10-bit successive-approximation analog-to-digital converter with multiple input channels, two CCP (Capture/Compare/PWM) modules, a USART port, an SSP (Synchronous Serial Port), and a watchdog timer. The supply voltage range is 4.5 V to 5.5 V, and the operating temperature range is -40 C to +85 C (industrial grade, indicated by the 'I' suffix).
The architecture combines a single-cycle hardware multiplier, an eight-level hardware stack, and a 16-level deep software stack, enabling efficient C compiler code generation. The PIC17C762 supports both external and internal program memory modes, with the OTP array providing one-time field programmability for production code. The device also integrates a power-on reset, brown-out reset, and low-voltage detection circuit.
Typical applications for the PIC17C762-33I/PT include industrial process control, motor control (BLDC and stepper), instrumentation front-ends requiring 10-bit ADC, HVAC controls, and embedded control boards where OTP-based program memory provides cost advantages over Flash parts. The wide digital I/O count (50 pins) supports keypad scanning, LCD driving, and parallel bus peripherals.
When designing with the PIC17C762, note that OTP memory cannot be reprogrammed - production programming must be done at the final stage, and any code bug requires a new device. Engineers should also verify the 33 MHz clock input stability, as the 121 ns instruction cycle is the critical timing parameter.
This page synthesizes Microchip PIC17C762 datasheet parameters, cross-reference alternatives, industrial-grade operating constraints, and practical OTP-programming design notes - information not consolidated on the manufacturer product page alone.
Bộ thay thế dễ dàng lắp đặt cho PIC17C762-33I/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 PIC17C762-33I/PT (cùng hình factor và footprint) — khác nhau ở Package, Data Bus Width, Core Architecture, Program Memory Size, Instruction Cycle Time.
PIC17C756A-33I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C756AT-33I/L
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Xem tài liệu →PIC17C762-16I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C762-16/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C752-33/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC17C752-33E/PT
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Xem tài liệu →PIC17C762-33I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit (Harvard, 16-bit instruction word) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 16 KB |
| RAM Size | 678 bytes |
| Tần số xung maksimum | 33 MHz |
| Instruction Cycle | 121 ns (single-cycle for most instructions) |
| Throughput | 8.25 MIPS |
| Instruction Set Size | 58 single-word instructions |
| Bề rộng đường dữ liệu | 8-bit (16-bit instruction word) |
| Supply Voltage (Vdd) | 4.5 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| I/O Pins | 50 (digital) |
| ADC | 10-bit successive approximation |
| Hộp | 80-pin TQFP (12x12 mm) |
| Kiểu lắp đặt | Surface Mount (Gull Wing) |
| Trạng thái RoHS | Compliant |
| Hardware Multiplier | Yes (single-cycle 8x8) |
| CCP Modules | 2 |
| USART | Yes (1) |
| SSP / I2C / SPI | Yes (Synchronous Serial Port) |
| Watchdog Timer | Yes |
| Brown-out Reset | Yes |
| Power-on Reset | Yes |
Cấu hình chân PIC17C762-33I/PT
| Chân 1 | MCLR — Master Clear (reset) input, active low |
| Chân 2 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Chân 4 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Chân 5 | RA3/AN3/VREF+ — Port A bit 3 / analog input 3 / VREF+ |
| Chân 6 | RA4/AN4 — Port A bit 4 / analog input 4 |
| Chân 7 | RA5/AN5 — Port A bit 5 / analog input 5 |
| Chân 8 | VSS — Ground |
| Chân 9 | OSC1 — Crystal/clock input |
| Chân 10 | OSC2 — Crystal/clock output |
| Chân 11 | RC0 — Port C bit 0 |
| Chân 12 | RC1 — Port C bit 1 |
| Chân 13 | RC2/CCP1 — Port C bit 2 / CCP1 output |
| Chân 14 | RC3/CCP2 — Port C bit 3 / CCP2 output |
| Chân 15 | RC4 — Port C bit 4 |
| Chân 16 | RC5 — Port C bit 5 |
| Chân 17 | RC6/TX/CK — Port C bit 6 / USART TX |
| Chân 18 | RC7/RX/DT — Port C bit 7 / USART RX |
| Chân 19 | VSS — Ground |
| Chân 20 | VDD — Positive supply 5V |
| Chân 21 | RD0 — Port D bit 0 |
| Chân 22 | RD1 — Port D bit 1 |
| Chân 23 | RD2 — Port D bit 2 |
| Chân 24 | RD3 — Port D bit 3 |
| Chân 25 | RD4 — Port D bit 4 |
| Chân 26 | RD5 — Port D bit 5 |
| Chân 27 | RD6 — Port D bit 6 |
| Chân 28 | RD7 — Port D bit 7 |
| Chân 29 | VSS — Ground |
| Chân 30 | VDD — Positive supply 5V |
| Chân 31 | RB0/INT — Port B bit 0 / external interrupt |
| Chân 32 | RB1 — Port B bit 1 |
| Chân 33 | RB2 — Port B bit 2 |
| Chân 34 | RB3 — Port B bit 3 |
| Chân 35 | RB4 — Port B bit 4 |
| Chân 36 | RB5 — Port B bit 5 |
| Chân 37 | RB6 — Port B bit 6 |
| Chân 38 | RB7 — Port B bit 7 |
| Chân 39 | VSS — Ground |
| Chân 40 | VDD — Positive supply 5V |
| Chân 41 | RE0 — Port E bit 0 |
| Chân 42 | RE1 — Port E bit 1 |
| Chân 43 | RE2 — Port E bit 2 |
| Chân 44 | RE3 — Port E bit 3 |
| Chân 45 | RE4 — Port E bit 4 |
| Chân 46 | RE5 — Port E bit 5 |
| Chân 47 | RE6 — Port E bit 6 |
| Chân 48 | RE7 — Port E bit 7 |
| Chân 49 | VSS — Ground |
| Chân 50 | VDD — Positive supply 5V |
| Chân 51 | RF0 — Port F bit 0 |
| Chân 52 | RF1 — Port F bit 1 |
| Chân 53 | RF2 — Port F bit 2 |
| Chân 54 | RF3 — Port F bit 3 |
| Chân 55 | RF4 — Port F bit 4 |
| Chân 56 | RF5 — Port F bit 5 |
| Chân 57 | RF6 — Port F bit 6 |
| Chân 58 | RF7 — Port F bit 7 |
| Chân 59 | VSS — Ground |
| Chân 60 | VDD — Positive supply 5V |
| Chân 61 | RG0 — Port G bit 0 |
| Chân 62 | RG1 — Port G bit 1 |
| Chân 63 | RG2 — Port G bit 2 |
| Chân 64 | RG3 — Port G bit 3 |
| Chân 65 | RG4 — Port G bit 4 |
| Chân 66 | RG5 — Port G bit 5 |
| Chân 67 | RG6 — Port G bit 6 |
| Chân 68 | RG7 — Port G bit 7 |
| Chân 69 | VSS — Ground |
| Chân 70 | VDD — Positive supply 5V |
| Chân 71 | RH0 — Port H bit 0 |
| Chân 72 | RH1 — Port H bit 1 |
| Chân 73 | RH2 — Port H bit 2 |
| Chân 74 | RH3 — Port H bit 3 |
| Chân 75 | RH4 — Port H bit 4 |
| Chân 76 | RH5 — Port H bit 5 |
| Chân 77 | RH6 — Port H bit 6 |
| Chân 78 | RH7 — Port H bit 7 |
| Chân 79 | AVSS — Analog ground |
| Chân 80 | AVDD — Analog positive supply 5V |
Ứng dụng tiêu biểu
PIC17C762-33I/PT phù hợp cho 6 Áp dụngs: Industrial Process Control, BLDC and Stepper Motor Control, Instrumentation Front-End with 10-bit ADC, HVAC Control Systems, Embedded Keypad and LCD Control Boards, Legacy Parallel-Bus Peripheral Controllers.
Industrial Process Control
The PIC17C762-33I/PT fits industrial process control boards because its 50 digital I/O pins drive multiple relay banks, solenoid valves, and indicator LEDs without external glue logic. The 10-bit ADC acquires 4-20 mA loop signals through sense resistors, and the 8.25 MIPS throughput handles PID loops at sub-millisecond sample intervals. The industrial -40 C to +85 C temperature range supports factory floor enclosures without thermal derating, while the 4.5-5.5 V supply matches 5 V regulated rails common in PLC backplanes. PIC18F8520 recommended for new designs.
Được đề xuất
BLDC and Stepper Motor Control
The PIC17C762-33I/PT drives BLDC and stepper motors through its two CCP (Capture/Compare/PWM) modules generating complementary PWM signals to half-bridge gate drivers. The 121 ns instruction cycle enables 30 kHz PWM frequencies with sub-microsecond duty-cycle resolution, sufficient for sinusoidal commutation at moderate RPMs. The 33 MHz clock and 8.25 MIPS throughput accommodate trapezoidal and pseudo-sinusoidal commutation algorithms with onboard back-EMF sensing. The 50 I/O pins handle Hall sensors, encoders, and fault inputs.
Được đề xuất
Instrumentation Front-End with 10-bit ADC
The PIC17C762-33I/PT is well-matched for instrumentation front-ends where a 10-bit ADC acquires analog signals from sensors (temperature, pressure, strain gauge bridges). The 10-bit ADC with multiple input channels provides adequate resolution for displaying measurements on LCDs or transmitting over USART/SSP. The 678-byte RAM supports moving-average filters and lookup-table linearization. The 80-pin TQFP package enables compact board layouts with easy probing. Engineering note: calibration constants must be stored in the OTP EPROM and are not field-updatable.
Được đề xuất
HVAC Control Systems
The PIC17C762-33I/PT controls HVAC equipment including furnace blowers, AC compressors, and damper actuators using its multi-channel 10-bit ADC for temperature/humidity sensors and its CCP PWM modules for variable-speed fan drives. The 50 I/O pins support multiple thermostat zones, communication displays, and safety interlocks. The industrial temperature range tolerates equipment-room environments, and the 5 V supply matches standard HVAC control transformer outputs. OTP memory locks production firmware against unauthorized modification.
Được đề xuất
Embedded Keypad and LCD Control Boards
The PIC17C762-33I/PT directly drives 4x4 or 5x5 keypads using its 50 I/O pins plus alphanumeric or graphical LCDs through parallel or serial interfaces via the SSP module. The 678-byte RAM holds UI buffers and menu state, while 16 KB OTP stores character maps and menu logic. The 33 MHz clock ensures snappy UI response (<10 ms button-to-display latency). Industrial temperature rating supports kiosk and human-machine interface (HMI) panels in outdoor enclosures.
Được đề xuất
Legacy Parallel-Bus Peripheral Controllers
The PIC17C762-33I/PT is well suited to legacy systems that interface parallel-bus peripherals such as external SRAM, EEPROM, FIFOs, or character LCD controllers through its 50 I/O pins (organized as Ports A-H). The 8.25 MIPS throughput executes memory-mapped bus protocols in software without DMA, and the 5 V supply matches TTL-compatible peripheral logic. The 16 KB OTP stores bus arbitration and timing routines that can be locked at production time. Use cases include data-logging front-ends, GPIB-to-UART bridges, and ISA-style peripheral emulation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC17C762-33I/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 | PIC17C756A-33I/PT | PIC17C756AT-33I/L | PIC17C762-16I/PT | PIC17C752-33/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-pin TQFP (12x12 mm) | 80-pin TQFP (12x12 mm) - same | PLCC-84 - different lead form | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same |
| Program Memory | 16 KB OTP | 32 KB OTP | 32 KB OTP | 16 KB OTP | 16 KB OTP |
| Maximum Clock | 33 MHz | 33 MHz | 33 MHz | 16 MHz | 33 MHz |
| RAM Size | 678 bytes | 902 bytes | 902 bytes | 678 bytes | 454 bytes |
| I/O Pins | 50 | 50 | 50 | 50 | 50 |
| 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 | 4.5 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| ADC | 10-bit | 10-bit (enhanced) | 10-bit | 10-bit | 10-bit |
Bảo phân biệt quan trọng
- Doubled OTP program memory (vsPIC17C756A-33I/PT)
- Industrial temperature grade with 33 MHz speed (vsPIC17C762-16I/PT)
- 678-byte RAM for richer buffering (vsPIC17C752-33/PT)
Ghi chú thiết kế
The PIC17C762-33I/PT uses OTP EPROM memory that can be programmed only ONCE. Any firmware bug discovered after programming requires physical replacement of the device. Engineers must thoroughly validate code on Flash-based equivalents (e.g., PIC18F8520 development boards) before committing to OTP programming. Production programming must use a gang programmer with UV-erase of any unused parts if a reset is needed (not possible after OTP programming).
The PIC17C762-33I/PT requires stable 5 V supply in the range 4.5 V to 5.5 V. Place 0.1 uF decoupling capacitors as close as possible to each VDD pin (pins 20, 30, 40, 50, 60, 70) and a single 10 uF tantalum bulk capacitor near the package. The AVdd/AVss pins (79, 80) should have separate analog filtering if the 10-bit ADC is used - add a ferrite bead and 10 uF + 0.1 uF on AVdd to reject digital switching noise from the core supply.
Estimated: at maximum 33 MHz clock with all 50 I/O pins driving 20 mA each (worst case), the PIC17C762-33I/PT dissipates approximately 0.6 W. With the 80-pin TQFP thermal resistance of approximately 50 C/W (estimated, no exposed pad), the junction temperature rise above ambient is approximately 30 C. Industrial-grade parts rated to +85 C ambient remain within the +125 C junction limit. A small copper pour under the package improves thermal performance.
Route the 33 MHz OSC1/OSC2 traces as short as possible (under 10 mm) and guard them with a ground pour on both sides. The MCLR pin (pin 1) requires a 10 kohm pull-up to VDD and a 0.1 uF capacitor to ground for noise immunity - do NOT leave MCLR floating or connected directly to VDD without the capacitor, as transient spikes can cause unintended resets in industrial environments.
Thông tin tuân thủ
RoHS compliance per Microchip product page. AEC-Q100 not applicable for industrial-grade MCU; AEC-Q100 is reserved for automotive-qualified parts. PIC17C762 family is obsolete; new automotive designs should use PIC18F or dsPIC33 families with AEC-Q100 qualification.