PIC16C67T-20I/PQ - 8-Bit 20MHz OTP MCU 14KB | Microchip
MPN: PIC16C67T-20I/PQ ✓ فعالPIC16C67T-20I/PQ نمای کلی
An 8-bit microcontroller (MCU) is a small, single-chip computer built around an 8-bit data path that integrates a CPU, program memory, data RAM, and peripherals. The PIC16C6X family belongs to Microchip's mid-range 8-bit MCU hierarchy (MCU -> 8-bit MCU -> PIC16 family -> PIC16C6X mid-range), and the PIC16C67 sits at the top of this mid-range tier with the largest program memory and most I/O. The PIC16C67T-20I/PQ is specifically the industrial-temperature, 20 MHz speed grade offered in tape-and-reel ('T') MQFP packaging, distinguished from the PIC16C67-20I/PQ by its tape-and-reel orientation for high-volume SMT assembly lines.
The PIC16C67T-20I/PQ's 35-instruction RISC architecture executes every instruction in a single 200 ns cycle (except program branches, which take two cycles), giving it deterministic throughput for real-time control. Key features include three 8-bit and one 16-bit timer/counter modules, two analog comparators, a USART, an SSP module supporting SPI and I2C (master/slave), a watchdog timer with its own on-chip RC oscillator, programmable code protection, and selectable oscillator modes (XT, HS, RC, LP, and external clock).
Architecturally, the device uses a Harvard bus structure with separate program and data paths and a 14-bit-wide instruction word, allowing any register to be used directly as an accumulator. The 8-level hardware stack and 35 single-word instructions deliver high code density versus CISC 8-bit alternatives, while OTP program memory enables rapid prototyping of mature designs destined for masked-ROM production.
Typical applications include industrial process control, motor-control front-ends, sensor signal conditioning, embedded communication bridges, and instrumentation requiring deterministic 8-bit processing. The 33 I/O pins also make it well suited for HVAC controllers, security panels, and white-goods appliance control boards where cost-sensitive MCU integration outweighs the need for in-system re-programmability.
When designing with this part, note that the OTP variant cannot be erased or re-programmed in-circuit, so firmware verification must be completed before final programming - designers typically use a windowed (UV-erasable) PIC16C67JW or a Flash-based PIC16F877 for development and validation, then commit the locked firmware to the OTP PIC16C67T for production.
This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
جایگزین‌های drop-in برای PIC16C67T-20I/PQ — 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/PQ (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Core Architecture, Instruction Set, Operating Temperature, Program Memory Type.
PIC16C67-20I/PQ
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C67-10I/PQ
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C67-04I/PQ
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16C67-20E/PQ
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
PIC16C67T-20E/PQ
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
PIC16C67T-20I/PQ حداکثر مقادیر مجاز و مشخصات الکتریکی
| Family | PIC® 16C |
| Core Architecture | 8-bit RISC (Harvard) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 14 KB (8K x 14) |
| Data RAM | 368 bytes |
| حداکثر فرکانس کلاک | 20 MHz |
| Instruction Cycle Time | 200 ns (single cycle) |
| Number of Instructions | 35 single-word |
| I/O Pins | 33 |
| ولتاژ تغذیه | 4.5 V to 5.5 V |
| محدوده دمای کاری | -40 C to +85 C (Industrial) |
| Timer/Counters | 3 x 8-bit + 1 x 16-bit |
| Communication Interfaces | USART, SSP (SPI / I2C master-slave) |
| Analog Comparators | 2 |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| Hardware Stack | 8 levels |
| بسته‌بندی | MQFP-44 (PQ) 10 x 10 mm |
| Package Type Code | PQ = Plastic Quad Flat Pack, gull-wing |
| نوع نصب | Surface Mount |
پیکربندی پین PIC16C67T-20I/PQ
| پین 1 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| پین 2 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| پین 3 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| پین 4 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / voltage reference |
| پین 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| پین 6 | RA5/SS/AN4 — PORTA bit 5 / SSP slave select / analog input 4 |
| پین 7 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| پین 8 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| پین 9 | MCLR/VPP — Master clear reset (active low) / programming voltage |
| پین 10 | VSS — Ground reference |
| پین 11 | VDD — Positive supply (4.5V to 5.5V) |
| پین 12 | RB0/INT — PORTB bit 0 / external interrupt |
| پین 13 | RB1 — PORTB bit 1 |
| پین 14 | RB2 — PORTB bit 2 |
| پین 15 | RB3 — PORTB bit 3 |
| پین 16 | RB4 — PORTB bit 4 |
| پین 17 | RB5 — PORTB bit 5 |
| پین 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| پین 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| پین 20 | VSS — Ground reference |
| پین 21 | VDD — Positive supply |
| پین 22 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock in |
| پین 23 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| پین 24 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| پین 25 | RC3/SCK/SCL — PORTC bit 3 / SSP clock (SPI / I2C) |
| پین 26 | RC4/SDI/SDA — PORTC bit 4 / SSP data in (SPI) / data (I2C) |
| پین 27 | RC5/SDO — PORTC bit 5 / SSP data out (SPI) |
| پین 28 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| پین 29 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| پین 30 | VSS — Ground reference |
| پین 31 | VDD — Positive supply |
| پین 32 | RD0 — PORTD bit 0 |
| پین 33 | RD1 — PORTD bit 1 |
| پین 34 | RD2 — PORTD bit 2 |
| پین 35 | RD3 — PORTD bit 3 |
| پین 36 | RD4 — PORTD bit 4 |
| پین 37 | RD5 — PORTD bit 5 |
| پین 38 | RD6 — PORTD bit 6 |
| پین 39 | RD7 — PORTD bit 7 |
| پین 40 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| پین 41 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| پین 42 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| پین 43 | VSS — Ground reference |
| پین 44 | VDD — Positive supply |
کاربردهای معمول
PIC16C67T-20I/PQ مناسب است برای 7 کاربردs: Industrial Process Control, Motor Control Front-End, Sensor Signal Conditioning, Embedded Communication Bridge, HVAC and Building Automation, Security and Access Control Panels, White-Goods Appliance Control.
Industrial Process Control
The PIC16C67T-20I/PQ fits industrial process-control loops thanks to its 33 digital I/O pins, 4.5V to 5.5V supply range, and -40C to +85C industrial temperature grade. Its three 8-bit plus one 16-bit timer/counters deliver the deterministic timing required for PID loops, while the SSP module provides SPI or I2C connectivity to industrial sensor front-ends. The 14KB OTP program memory locks firmware into mature control algorithms, and the 368-byte data RAM is sufficient for stack-based control code and small data tables. Place the part with its MQFP-44 footprint on a four-layer PCB with the MCLR pull-up and decoupling caps routed close to the VDD/VSS pins.
پیشنهادی
Motor Control Front-End
Use the PIC16C67T-20I/PQ as the control MCU for small DC and stepper motor drive front-ends, where its 20 MHz clock delivers 200 ns single-cycle instruction throughput for fast commutation loops. The 16-bit timer/counter can be configured for PWM generation, while the USART drives RS-232/RS-485 command links to a host controller. The 33 I/O pins easily handle direction, fault, enable, and tachometer signals, and the analog comparators provide hardware over-current protection. The OTP memory ensures locked control firmware in production motors that do not require field updates.
پیشنهادی
Sensor Signal Conditioning
The PIC16C67T-20I/PQ suits sensor-interface boards that aggregate data from thermocouples, RTDs, pressure transducers, or flow meters, leveraging its 33 I/O to multiplex multiple sensor channels. The two analog comparators support threshold detection and zero-crossing detection without external components, while the SSP module reads SPI or I2C digital sensors directly. Industrial temperature grade and the 5V supply simplify integration into legacy 5V sensor systems, and the OTP memory secures calibration data plus signal-processing firmware against field tampering.
پیشنهادی
Embedded Communication Bridge
Use the PIC16C67T-20I/PQ as a protocol-conversion bridge between SPI, I2C, and USART busses in industrial networks, taking advantage of its on-chip USART plus SSP (SPI/I2C) peripherals. With 368 bytes of RAM and 14KB of OTP code space, it can implement small Modbus RTU slave stacks, I2C-to-SPI gateways, or RS-232-to-RS-485 converters. The 20 MHz instruction rate supports 115200-baud USART traffic with comfortable timing margins. Industrial temperature rating and 5V operation make it compatible with legacy industrial wiring.
پیشنهادی
HVAC and Building Automation
The PIC16C67T-20I/PQ is well matched to HVAC zone controllers and building-automation sub-panels that read temperature/humidity sensors and drive relays, triacs, or 0-10 V actuators. Its 33 I/O lines support multiple zone inputs and outputs, the USART links to a building management system (BMS) over RS-485, and the 14KB OTP secures the locked control firmware. The industrial -40C to +85C temperature grade handles unconditioned plant-room environments, and the MQFP-44 package is robust against the vibration typical of rooftop or basement plant equipment.
پیشنهادی
Security and Access Control Panels
The PIC16C67T-20I/PQ is suited for security panels, keypad controllers, and access-control reader boards thanks to its 33 I/O for zone inputs, indicator LEDs, and keypad scanning. The on-chip USART connects to upstream control panels, while the SSP module interfaces with Wiegand-format card readers. The 14KB OTP memory locks the firmware to prevent field tampering, and the 368-byte RAM supports small event buffers. Industrial temperature rating ensures reliable operation in unheated vestibules, garages, and outdoor cabinets.
پیشنهادی
White-Goods Appliance Control
The PIC16C67T-20I/PQ is widely deployed in washing machines, dishwashers, and small kitchen appliances where deterministic 8-bit control of motors, valves, heaters, and user interfaces is required. Its 33 I/O drive seven-segment displays, keypads, and triac-fired loads; the 16-bit timer generates PWM for variable-speed drives; and the 14KB OTP locks in the appliance's safety-certified firmware. Cost-sensitive consumer applications benefit from the lowest OTP unit price and the proven PIC16C6X mid-range architecture, which has decades of field reliability data.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC16C67T-20I/PQ — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC16C67-20I/PQ | PIC16C67-10I/PQ | PIC16C67-04I/PQ | PIC16C67-20E/PQ | PIC16C67T-20E/PQ |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | MQFP-44 (PQ) 10x10 mm | MQFP-44 (PQ) 10x10 mm - same | MQFP-44 (PQ) 10x10 mm - same | MQFP-44 (PQ) 10x10 mm - same | MQFP-44 (PQ) 10x10 mm - same | MQFP-44 (PQ) 10x10 mm - same |
| Program Memory | 14 KB (8K x 14) OTP | 14 KB OTP | 14 KB OTP | 14 KB OTP | 14 KB OTP | 14 KB OTP |
| Data RAM | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes |
| Max Clock Frequency | 20 MHz | 20 MHz | 10 MHz | 4 MHz | 20 MHz | 20 MHz |
| 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 +125 C (Extended) | -40 C to +125 C (Extended) |
| 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 | 4.5 V to 5.5 V |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Packaging Carrier | Tape & Reel | Tray | Tray | Tray | Tray | Tape & Reel |
| Lifecycle Status | Active | Active | Active | Active | Active | Active |
تفاوت‌های کلیدی
- Highest memory density in PIC16C6X mid-range family (در مقابلPIC16C66-20I/SO)
- Largest I/O count in PIC16C6X family (در مقابلPIC16C65A-20I/PQ)
- Industrial temperature grade with on-chip watchdog (در مقابلPIC16F877-20I/PQ)
یادداشت‌های طراحی
Place a 0.1 uF ceramic decoupling capacitor as close as possible to each VDD pin (pins 11, 21, 31, 44) and a single 10 uF bulk tantalum or ceramic capacitor on the supply rail. The PIC16C67T-20I/PQ draws up to roughly 20 mA at 20 MHz with all peripherals active, so the VDD trace should be at least 0.5 mm wide on a 1 oz copper outer layer. An MCLR pull-up resistor (typically 10 kohm) is required to keep the part out of reset during power-up; add a diode from VDD to MCLR if VDD rise time exceeds the in-circuit spec.
The MQFP-44 10x10 mm package has 0.8 mm pitch gull-wing leads, so use a 4-layer PCB with a continuous ground plane directly under the device to provide both thermal spreading and a low-impedance return path for high-speed digital signals. Keep the oscillator traces (OSC1/OSC2) short, guarded by ground traces, and route them away from high-current switching lines to avoid injecting noise into the clock. Place the ICSP header (RB6/RB7/MCLR/VDD/VSS) on the same edge of the board with no series resistors on PGC/PGD to keep in-circuit programming reliable.
OTP (One-Time Programmable) memory cannot be erased or re-programmed - any firmware bug discovered after programming is permanent. Mitigate this risk by developing and verifying firmware on a windowed PIC16C67JW or a Flash-based PIC16F877-20I/PQ first, then committing the locked firmware image to the PIC16C67T-20I/PQ for production. Also confirm the oscillator configuration bits match the external crystal or resonator before programming, since a mismatched HS/XT/RC mode prevents the part from running. Always verify code-protection settings and the watchdog timer enable state in the CONFIG word before committing to OTP.
The USART and SSP peripherals share the PORTC pins, so high-speed SPI or I2C traffic can couple noise into USART RX. Reserve RC6/RC7 for USART only and avoid running the SSP and USART simultaneously above 115200 baud without careful decoupling. The PORTB pins feature internal weak pull-ups that can be individually enabled via the RBPU bit; use them for keypad or switch inputs but disable them when PORTB drives LEDs or external logic to avoid contention. Add 100 ohm series resistors on RB6/RB7 if they are used as digital outputs to limit ringing during ICSP programming.
اطلاعات انطباق
RoHS and REACH compliance not stated in the provided Verified Web Data; PIC16C6X OTP family parts historically predate the RoHS transition, so verify with Microchip direct for current compliance status. Not AEC-Q100 qualified - this part targets industrial/appliance use, not automotive.
