PIC17C762-33I/PT - 8-bit OTP MCU, 33MHz, 16KB EPROM | Microchip
MPN: PIC17C762-33I/PT ✗ סוף ייצורPIC17C762-33I/PT סקירה
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 The 'C' suffix denotes EPROM (one-time-programmable) program memory, which was later superseded by Flash-based PIC18F equivalents.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.
חלופות תחליף ישיר עבור PIC17C762-33I/PT — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC17C762-33I/PT (אותו גורם צורה וטביעת רגל) — שונים ב Package, Data Bus Width, Core Architecture, Program Memory Size, Instruction Cycle Time.
PIC17C756A-33I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC17C756AT-33I/L
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC17C762-16I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC17C762-16/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC17C752-33/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC17C752-33E/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC17C762-33I/PT דירוגים מרביים ומאפיינים חשמליים
| Core Architecture | PIC 8-bit (Harvard, 16-bit instruction word) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 16 KB |
| RAM Size | 678 bytes |
| תדר שעון מקסימלי | 33 MHz |
| Instruction Cycle | 121 ns (single-cycle for most instructions) |
| Throughput | 8.25 MIPS |
| Instruction Set Size | 58 single-word instructions |
| רוחב אפיק נתונים | 8-bit (16-bit instruction word) |
| Supply Voltage (Vdd) | 4.5 V to 5.5 V |
| טווח טמפרטורת פעולה | -40 C to +85 C (Industrial) |
| I/O Pins | 50 (digital) |
| ADC | 10-bit successive approximation |
| מארז | 80-pin TQFP (12x12 mm) |
| סוג הרכבה | Surface Mount (Gull Wing) |
| סטטוס 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 |
תצורת פינים של PIC17C762-33I/PT
| פין 1 | MCLR — Master Clear (reset) input, active low |
| פין 2 | RA0/AN0 — Port A bit 0 / analog input 0 |
| פין 3 | RA1/AN1 — Port A bit 1 / analog input 1 |
| פין 4 | RA2/AN2 — Port A bit 2 / analog input 2 |
| פין 5 | RA3/AN3/VREF+ — Port A bit 3 / analog input 3 / VREF+ |
| פין 6 | RA4/AN4 — Port A bit 4 / analog input 4 |
| פין 7 | RA5/AN5 — Port A bit 5 / analog input 5 |
| פין 8 | VSS — Ground |
| פין 9 | OSC1 — Crystal/clock input |
| פין 10 | OSC2 — Crystal/clock output |
| פין 11 | RC0 — Port C bit 0 |
| פין 12 | RC1 — Port C bit 1 |
| פין 13 | RC2/CCP1 — Port C bit 2 / CCP1 output |
| פין 14 | RC3/CCP2 — Port C bit 3 / CCP2 output |
| פין 15 | RC4 — Port C bit 4 |
| פין 16 | RC5 — Port C bit 5 |
| פין 17 | RC6/TX/CK — Port C bit 6 / USART TX |
| פין 18 | RC7/RX/DT — Port C bit 7 / USART RX |
| פין 19 | VSS — Ground |
| פין 20 | VDD — Positive supply 5V |
| פין 21 | RD0 — Port D bit 0 |
| פין 22 | RD1 — Port D bit 1 |
| פין 23 | RD2 — Port D bit 2 |
| פין 24 | RD3 — Port D bit 3 |
| פין 25 | RD4 — Port D bit 4 |
| פין 26 | RD5 — Port D bit 5 |
| פין 27 | RD6 — Port D bit 6 |
| פין 28 | RD7 — Port D bit 7 |
| פין 29 | VSS — Ground |
| פין 30 | VDD — Positive supply 5V |
| פין 31 | RB0/INT — Port B bit 0 / external interrupt |
| פין 32 | RB1 — Port B bit 1 |
| פין 33 | RB2 — Port B bit 2 |
| פין 34 | RB3 — Port B bit 3 |
| פין 35 | RB4 — Port B bit 4 |
| פין 36 | RB5 — Port B bit 5 |
| פין 37 | RB6 — Port B bit 6 |
| פין 38 | RB7 — Port B bit 7 |
| פין 39 | VSS — Ground |
| פין 40 | VDD — Positive supply 5V |
| פין 41 | RE0 — Port E bit 0 |
| פין 42 | RE1 — Port E bit 1 |
| פין 43 | RE2 — Port E bit 2 |
| פין 44 | RE3 — Port E bit 3 |
| פין 45 | RE4 — Port E bit 4 |
| פין 46 | RE5 — Port E bit 5 |
| פין 47 | RE6 — Port E bit 6 |
| פין 48 | RE7 — Port E bit 7 |
| פין 49 | VSS — Ground |
| פין 50 | VDD — Positive supply 5V |
| פין 51 | RF0 — Port F bit 0 |
| פין 52 | RF1 — Port F bit 1 |
| פין 53 | RF2 — Port F bit 2 |
| פין 54 | RF3 — Port F bit 3 |
| פין 55 | RF4 — Port F bit 4 |
| פין 56 | RF5 — Port F bit 5 |
| פין 57 | RF6 — Port F bit 6 |
| פין 58 | RF7 — Port F bit 7 |
| פין 59 | VSS — Ground |
| פין 60 | VDD — Positive supply 5V |
| פין 61 | RG0 — Port G bit 0 |
| פין 62 | RG1 — Port G bit 1 |
| פין 63 | RG2 — Port G bit 2 |
| פין 64 | RG3 — Port G bit 3 |
| פין 65 | RG4 — Port G bit 4 |
| פין 66 | RG5 — Port G bit 5 |
| פין 67 | RG6 — Port G bit 6 |
| פין 68 | RG7 — Port G bit 7 |
| פין 69 | VSS — Ground |
| פין 70 | VDD — Positive supply 5V |
| פין 71 | RH0 — Port H bit 0 |
| פין 72 | RH1 — Port H bit 1 |
| פין 73 | RH2 — Port H bit 2 |
| פין 74 | RH3 — Port H bit 3 |
| פין 75 | RH4 — Port H bit 4 |
| פין 76 | RH5 — Port H bit 5 |
| פין 77 | RH6 — Port H bit 6 |
| פין 78 | RH7 — Port H bit 7 |
| פין 79 | AVSS — Analog ground |
| פין 80 | AVDD — Analog positive supply 5V |
יישומים טיפוסיים
PIC17C762-33I/PT מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC17C762-33I/PT — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Doubled OTP program memory (לעומתPIC17C756A-33I/PT)
- Industrial temperature grade with 33 MHz speed (לעומתPIC17C762-16I/PT)
- 678-byte RAM for richer buffering (לעומתPIC17C752-33/PT)
הערות תכנון
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.
מידע על תאימות
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.