PIC16C67T-20I/PT - 8-Bit 20MHz MCU, 14KB OTP, 44-TQFP | Microchip
MPN: PIC16C67T-20I/PT ✗ پایان تولیدPIC16C67T-20I/PT نمای کلی
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripherals into one package. The PIC16C family uses a RISC (Reduced Instruction Set Computer) architecture with 35 single-word instructions, where every instruction executes in one instruction cycle (4 clock cycles). MCUs sit at the lowest tier of the embedded hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor device, and they remain dominant in cost-sensitive and deterministic control tasks where 32-bit processors are over-spec'd.
Key features of the PIC16C67T-20I/PT include: (1) wide 4.0V to 6.0V supply voltage range for industrial power rails; (2) fully static CMOS design enabling DC to 20 MHz operation; (3) on-chip peripherals including a 10-bit ADC, two 8-bit timers and one 16-bit timer, an enhanced USART, MSSP (I2C/SPI), and capture/compare/PWM modules; (4) industrial -40C to +85C operating temperature range (the "I" suffix); and (5) three serial communication interfaces (I2C, SPI, UART/USART) for sensor networks and inter-MCU buses.
Architecturally, the PIC16C67 uses Harvard memory separation with a 14-bit instruction word and 8-bit data path. Its OTP EPROM cell enables one-time field programming with cost advantages over Flash, suitable for mature high-volume industrial products. The brown-out detect and watchdog timer support safety-critical applications where lockup recovery is mandatory.
Typical applications include industrial control modules, motor drive controllers (using the PWM module), sensor interface boards (using the ADC and I2C/SPI peripherals), building automation, and embedded legacy replacement of older 8051-based designs. The 44-TQFP package provides ample I/O for keypad scanning, LCD drive, and multi-sensor acquisition.
When designing with this part, note that OTP memory cannot be re-programmed - firmware bugs require a board swap, not a reflash. Use the PIC16F877 Flash equivalent for prototypes or low-volume runs, and reserve the PIC16C67T-20I/PT for cost-optimized high-volume production.
This page consolidates distributor pricing, pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers source, evaluate, and integrate the PIC16C67T-20I/PT into legacy and new designs.
جایگزین‌های drop-in برای PIC16C67T-20I/PT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC16C67T-20I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Program Memory Size, Package, Timers, Program Memory Type, ADC.
PIC16C67-20I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C67T-20/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C67-20/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C67T-04I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C67T-04/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16F877-20I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C67T-20I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core | PIC16 8-bit RISC |
| Program Memory Size | 14 KB (8K x 14) OTP EPROM |
| RAM Size | 368 x 8 bytes (368 bytes) |
| EEPROM Size | None (OTP device) |
| CPU Speed | 20 MHz maximum |
| Instruction Set | 35 single-word instructions |
| Number of I/O Pins | 33 |
| ولتاژ تغذیه | 4.0 V to 6.0 V |
| محدوده دمای کاری | -40 C to +85 C (Industrial) |
| بسته‌بندی | 44-pin TQFP (10x10 mm), Tape & Reel |
| نوع نصب | Surface Mount |
| ADC | 8-channel 10-bit |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Communication Interfaces | I2C, SPI, UART/USART (MSSP + USART) |
| PWM Modules | 2 (Capture/Compare/PWM) |
| Watchdog Timer | Yes (WDT) |
| Brown-out Reset | Yes (BOR) |
| Power-on Reset | Yes (POR) |
| Oscillator | External (crystal/RC/HS supported) |
| وضعیت RoHS | Compliant |
پیکربندی پین PIC16C67T-20I/PT
| پین 1 | OSC1/CLKI — External oscillator input or crystal connection |
| پین 2 | OSC2/CLKO — External oscillator output or clock output |
| پین 3 | MCLR/VPP — Master Clear (active-low reset) / programming voltage input |
| پین 4 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| پین 5 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| پین 6 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC negative reference |
| پین 7 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC positive reference |
| پین 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| پین 9 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| پین 10 | VSS — Ground reference |
| پین 11 | VDD — Positive supply voltage (4.0V to 6.0V) |
| پین 12 | RB0/INT — PORTB bit 0 / External interrupt input |
| پین 13 | RB1 — PORTB bit 1 |
| پین 14 | RB2 — PORTB bit 2 |
| پین 15 | RB3/PGM — PORTB bit 3 / Low-voltage programming input |
| پین 16 | RB4 — PORTB bit 4 |
| پین 17 | RB5 — PORTB bit 5 |
| پین 18 | RB6/PGC — PORTB bit 6 / In-circuit debugger clock |
| پین 19 | RB7/PGD — PORTB bit 7 / In-circuit debugger data |
| پین 20 | VSS — Ground reference |
| پین 21 | VDD — Positive supply voltage (4.0V to 6.0V) |
| پین 22 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| پین 23 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| پین 24 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| پین 25 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| پین 26 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| پین 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| پین 28 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| پین 29 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| پین 30 | VSS — Ground reference |
| پین 31 | VDD — Positive supply voltage (4.0V to 6.0V) |
| پین 32 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| پین 33 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| پین 34 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| پین 35 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| پین 36 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| پین 37 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| پین 38 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| پین 39 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| پین 40 | VSS — Ground reference |
| پین 41 | VDD — Positive supply voltage (4.0V to 6.0V) |
| پین 42 | RE0/RD/AN5 — PORTE bit 0 / Read control for PSP / Analog input 5 |
| پین 43 | RE1/WR/AN6 — PORTE bit 1 / Write control for PSP / Analog input 6 |
| پین 44 | RE2/CS/AN7 — PORTE bit 2 / Chip select for PSP / Analog input 7 |
کاربردهای معمول
PIC16C67T-20I/PT مناسب است برای 6 کاربردs: Industrial Process Control Modules, Motor Drive and PWM Controllers, Sensor Interface Boards (I2C/SPI/UART), Building Automation and HVAC Controllers, Legacy 8051 Replacement (Pin-Compatible Migration), Embedded Appliance Controllers.
Industrial Process Control Modules
The PIC16C67T-20I/PT fits industrial process control modules because its 14 KB OTP program memory supports small-to-medium control firmware, and its 8-channel 10-bit ADC reads multiple analog sensor inputs (temperature, pressure, flow) directly without external signal conditioning. Placed on a 5V industrial rail, the -40C to +85C industrial temperature range handles factory-floor thermal extremes. The 33 I/O pins drive relays, indicator LEDs, and keypad inputs simultaneously, eliminating the need for an I/O expander. Its 20 MHz instruction rate delivers 5 MIPS, sufficient for PID loop execution at 100 Hz sampling. Compared with a 32-bit MCU, the PIC16C67T-20I/PT is dramatically cheaper (~$6-9 vs $3-15 in volume) and its deterministic RISC core simplifies real-time validation.
پیشنهادی
Motor Drive and PWM Controllers
The PIC16C67T-20I/PT's 2 Capture/Compare/PWM (CCP) modules make it well-suited for brushed DC motor speed control, small stepper drives, and PWM dimming applications. The 20 MHz clock provides 5 MIPS, enabling PWM frequencies up to 78 kHz at 8-bit resolution (fast enough to avoid audible motor whine). The 33 I/O pins support quadrature encoder input, direction control, and over-current feedback signals without multiplexing. Brown-out detect and watchdog timer provide fault recovery critical for unattended motor drive deployments. The 44-TQFP package fits within compact motor-control PCBs alongside gate drivers like the MCP1407. For higher-performance BLDC or FOC control, the PIC18F4431 offers dedicated motor-control PWM hardware.
پیشنهادی
Sensor Interface Boards (I2C/SPI/UART)
The PIC16C67T-20I/PT's MSSP (Master Synchronous Serial Port) supporting both I2C and SPI, combined with the enhanced USART, lets the device act as a sensor hub aggregating multiple digital sensors and forwarding data upstream. The 33 I/O pins can host up to two simultaneous I2C buses (one MSSP + bit-banged), enabling isolation between sensor channels. The 8-channel 10-bit ADC additionally reads analog sensors, providing mixed-signal aggregation in one chip. Operating from 4.0V to 6.0V, the part accepts common industrial sensor power levels directly. Designers frequently pair the PIC16C67T-20I/PT with sensors like the MCP9808 (I2C temperature) and MPU-6050 (I2C IMU) on the same PCB for compact sensor nodes.
پیشنهادی
Building Automation and HVAC Controllers
The PIC16C67T-20I/PT's 14 KB OTP program memory and 33 I/O pins are well-matched to HVAC controller boards that need to read multiple zone temperatures, drive damper actuators, and communicate with central control units. The industrial -40C to +85C temperature range supports unheated equipment rooms and rooftop installations. Three serial interfaces (I2C, SPI, USART) enable BACnet or Modbus gateway modules. The Brown-out Reset prevents false state during power brownouts common in HVAC compressor switching. The PIC16C67T-20I/PT's cost point (~$6-9 at volume) suits price-sensitive commercial building automation where dozens of controllers are deployed per facility.
پیشنهادی
Legacy 8051 Replacement (Pin-Compatible Migration)
The PIC16C67T-20I/PT can serve as a pin-compatible replacement for legacy 8051-family microcontrollers in mature industrial designs where the original part has gone EOL. With 33 I/O pins in a 44-TQFP footprint, it fits standard 8051 socket adapter boards. The RISC architecture executes instructions 4x faster than the 8051 at the same clock rate, providing headroom for software upgrades. The 14 KB OTP program memory and 368 bytes RAM accommodate typical 8051 firmware with minor optimization. Designers can migrate existing 8051 codebases (assembly or C) to PIC16 with MPLAB-X IDE and the XC8 compiler. Existing boards can be reused with minor BOM swaps, avoiding costly PCB redesign.
پیشنهادی
Embedded Appliance Controllers
The PIC16C67T-20I/PT's combination of OTP memory (lowest unit cost for high volume), 33 I/O for keypad/LCD/relay interfacing, and three serial interfaces makes it ideal for embedded appliance controllers such as washing machines, dishwashers, and microwave ovens. The OTP program memory prevents firmware tampering in consumer products and reduces per-unit cost below Flash equivalents by 10-30 percent at high volumes. The 20 MHz speed runs main control loops fast enough to handle multiple motor and heater outputs in real time. The watchdog timer prevents lockup in unattended operation, a critical safety feature for appliance compliance. Pair it with character LCDs driven directly from the I/O pins and triac drivers like the MOC3021.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC16C67T-20I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC16C67-20I/PT | PIC16C67T-20/PT | PIC16C67T-04I/PT | PIC16C67T-04/PT | PIC16F877-20I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Core Architecture | 8-bit PIC16 RISC | 8-bit PIC16 RISC - same | 8-bit PIC16 RISC - same | 8-bit PIC16 RISC - same | 8-bit PIC16 RISC - same | 8-bit PIC16 RISC - same |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 4 MHz (-80%) | 4 MHz (-80%) | 20 MHz |
| Program Memory | 14 KB OTP EPROM | 14 KB OTP EPROM | 14 KB OTP EPROM | 14 KB OTP EPROM | 14 KB OTP EPROM | 14 KB Flash (reprogrammable) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Memory Type | OTP (one-time programmable) | OTP | OTP | OTP | OTP | Flash (re-programmable) |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | Active |
تفاوت‌های کلیدی
- Available in Tape & Reel for high-volume SMT production (در مقابلPIC16C67-20I/PT)
- Industrial temperature range for harsh environments (در مقابلPIC16C67T-20/PT)
- Full 20 MHz CPU performance (در مقابلPIC16C67T-04I/PT)
یادداشت‌های طراحی
Estimated: the PIC16C67T-20I/PT draws approximately 13-20 mA active at 20 MHz and 5V, plus up to 50 mA total I/O sourcing when fully loaded. Decouple each VDD pin (5 pins: 11, 21, 31, 41, plus VDD on the TQFP) with a 100 nF ceramic capacitor placed within 5 mm of the pin. Add a single 10 uF bulk tantalum or aluminum electrolytic capacitor near the MCU power entry point. Brown-out Reset (BOR) should be enabled in the configuration bits to prevent undefined operation during supply droops below 4.0V. For battery-backed designs, route the MCU's VDD through a Schottky diode and add a 100 uF reservoir capacitor to ride out brief power interruptions.
Place the external crystal or resonator within 10 mm of the OSC1 (pin 1) and OSC2 (pin 2) pins with symmetrical trace lengths. Add a ground guard ring around the oscillator traces to prevent noise coupling from nearby switching signals. The MCLR pin (pin 3) requires a 10 kohm pull-up resistor to VDD for normal operation; for ICSP programming, use a typical Microchip-recommended ICSP circuit with a 10 kohm pull-up and a series resistor of approximately 470 ohm to prevent programming voltage back-feed. Keep analog inputs (PORTA and PORTE) physically separated from digital switching signals; route them on a separate analog ground island if mixed-signal performance is critical. The 44-TQFP thermal pad is not internally connected to ground; standard 44-TQFP PCBs do not require thermal via arrays.
OTP memory cannot be reflashed - any firmware bug discovered after production requires board-level rework or disposal. Plan comprehensive firmware validation before programming. Configuration bits must be set correctly on first programming: enable the watchdog timer (WDT) for unattended deployments, set the oscillator mode to match the crystal, enable or disable the low-voltage programming (LVP) pin (RB3/PGM), and select the appropriate brown-out voltage threshold. Pin RB3 is shared between GPIO and the LVP programming enable - if LVP is enabled, external circuitry on RB3 can interfere with programming. For multi-supplier designs, verify that alternates like PIC16C67-20I/PT (Tray vs T&R) maintain the same ordering code; some distributors list tray-only versions under different part numbers.
اطلاعات انطباق
Per Microchip product page; the part is NRND (Not Recommended for New Designs) as of 2026-09-18, but is still RoHS compliant. Not AEC-Q100 qualified; PIC16-family variants are not typically used in automotive safety-critical applications.