PIC16C67-20I/P - 8-Bit 20MHz 14KB OTP MCU 40-PDIP | Microchip
MPN: PIC16C67-20I/P ✓ Hoạt độngPIC16C67-20I/P Tóm tắt
What is an 8-bit OTP microcontroller? An 8-bit OTP (One-Time-Programmable) microcontroller is a small programmable computer on a single IC that executes instructions 8 bits at a time and stores its program in non-volatile memory that can be written exactly once. Within the broader taxonomy, OTP microcontrollers sit under the category of embedded microcontrollers, which themselves belong to microcontrollers, integrated circuits, and finally semiconductors. OTP parts are typically lower cost than flash or EEPROM equivalents and are widely used in high-volume consumer and industrial products where firmware is finalised before production.
The PIC16C67-20I/P executes instructions in a single 200 ns cycle (except program branches which take two cycles) at 20 MHz, and features a fully static design that allows the clock to be stopped without losing register state. It integrates three timer/counters, a synchronous serial port (SSP) supporting SPI and I²C, a USART, an 8-bit ADC with up to 8 channels, a parallel slave port, and a capture/compare/PWM module, providing substantial on-chip peripherals for the era. The OTP program memory, RISC architecture, and rich peripheral set make this MCU a strong choice for embedded control designs where deterministic execution is required.
Typical applications include industrial automation controllers, sensor interfacing front-ends, motor-control front-ends, automotive body electronics, consumer appliances, and low-cost embedded control boards that must operate reliably across wide temperature and voltage ranges. The 40-pin PDIP package is also friendly for prototyping, educational platforms, and legacy equipment maintenance. When designing with this device, ensure the part is programmed before PCB assembly or via the ICSP interface, because OTP memory cannot be erased or rewritten after the programming event.
Bộ thay thế dễ dàng lắp đặt cho PIC16C67-20I/P — 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 PIC16C67-20I/P (cùng hình factor và footprint) — khác nhau ở Package, Timers, ADC, Core Architecture, Operating Temperature.
PIC16F877-20I/P
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Xem tài liệu →PIC16C67-20/PT
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Xem tài liệu →PIC16C67-10I/PT
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Xem tài liệu →PIC16C67-20I/P Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16C6x 8-bit RISC |
| Program Memory Type | OTP (One-Time-Programmable) EPROM |
| Program Memory Size | 14 KB (8K x 14) |
| RAM Size | 368 bytes |
| Maximum CPU Clock | 20 MHz |
| Instruction Cycle Time | 200 ns (single-cycle instructions) |
| Instruction Set Size | 35 single-word instructions |
| Supply Voltage Range | 4.5 V to 5.5 V |
| I/O Pins | 33 |
| Timers | 3 (Timer0, Timer1, Timer2) |
| ADC | 8-bit, up to 8 channels |
| Communication Peripherals | USART, SSP (SPI/I²C) |
| Hộp | 40-pin PDIP (0.600 inch, 15.24 mm) |
| Khoảng nhiệt độ hoạt động | Industrial (-40°C to +85°C) |
| Kiểu lắp đặt | Through-Hole (DIP) |
Cấu hình chân PIC16C67-20I/P
| Chân 1 | MCLR/VPP — Master clear (reset) input / programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Chân 5 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / ADC reference |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SSP slave select |
| Chân 8 | RE0/RD/AN5 — PORTE bit 0 / parallel slave port read / analog input 5 |
| Chân 9 | RE1/WR/AN6 — PORTE bit 1 / parallel slave port write / analog input 6 |
| Chân 10 | RE2/CS/AN7 — PORTE bit 2 / parallel slave port chip select / analog input 7 |
| Chân 11 | VDD — Positive supply (4.5 V to 5.5 V) |
| Chân 12 | VSS — Ground reference |
| Chân 13 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Chân 14 | OSC2/CLKO — Oscillator crystal output / clock output |
| Chân 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| Chân 17 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Chân 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I²C clock |
| Chân 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| Chân 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| Chân 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| Chân 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| Chân 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I²C data |
| Chân 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 25 | RC6/TX/CK — PORTC bit 6 / USART transmit / clock |
| Chân 26 | RC7/RX/DT — PORTC bit 7 / USART receive / data |
| Chân 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| Chân 28 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| Chân 29 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| Chân 30 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| Chân 31 | VSS — Ground reference |
| Chân 32 | VDD — Positive supply (4.5 V to 5.5 V) |
| Chân 33 | RB0/INT — PORTB bit 0 / external interrupt input |
| Chân 34 | RB1 — PORTB bit 1 |
| Chân 35 | RB2 — PORTB bit 2 |
| Chân 36 | RB3/PGM — PORTB bit 3 / low-voltage ICSP programming input |
| Chân 37 | RB4 — PORTB bit 4 |
| Chân 38 | RB5 — PORTB bit 5 |
| Chân 39 | RB6/PGC — PORTB bit 6 / ICSP clock input |
| Chân 40 | RB7/PGD — PORTB bit 7 / ICSP data I/O |
Ứng dụng tiêu biểu
PIC16C67-20I/P phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, Sensor Interfacing Front-Ends, Motor Control Front-Ends, Automotive Body Electronics, Consumer Appliance Control, Educational and Prototyping Platforms.
Industrial Automation Controllers
The PIC16C67-20I/P suits industrial automation controllers that require deterministic 8-bit processing at 20 MHz with 33 I/O lines for sensors, relays, and switches. Its 14 KB OTP memory is large enough for multi-state machine firmware, while the three timer/counters drive PWM outputs for motor or valve control. The industrial -40°C to +85°C temperature range handles factory-floor environments, and the 40-pin PDIP package simplifies prototyping and field replacement on legacy equipment.
Được đề xuất
Sensor Interfacing Front-Ends
For sensor front-ends combining digital I/O with analog inputs, the PIC16C67-20I/P offers an integrated 8-bit ADC with up to 8 channels plus a USART for digital telemetry. The 368 bytes of RAM handle modest sensor buffering, and the SSP module supports SPI/I²C sensors directly. Its 5 V supply and industrial temperature rating suit process-control and environmental monitoring deployments where deterministic sampling at 20 MHz matters.
Được đề xuất
Motor Control Front-Ends
The PIC16C67-20I/P works well as a motor-control front-end, using its CCP module for PWM generation and three timers for back-EMF sensing and commutation timing. The 20 MHz instruction rate provides 200 ns resolution, sufficient for trapezoidal BLDC commutation and stepper acceleration profiles. The 33 digital I/O pins drive gate drivers, H-bridges, and encoder inputs while the USART links to higher-level controllers for closed-loop coordination.
Được đề xuất
Automotive Body Electronics
Inside automotive body modules such as lighting controllers, seat controllers, or HVAC interfaces, the PIC16C67-20I/P provides the 8-bit processing headroom and I/O count needed for relay driving, switch scanning, and LIN-style UART communication. The industrial temperature range tolerates under-dash thermal conditions, and the OTP memory secures final firmware at a low unit cost. The PIC16C67 family is widely used in mature automotive subsystems where firmware stability matters more than field updates.
Được đề xuất
Consumer Appliance Control
White-goods and small appliance controllers use the PIC16C67-20I/P because it integrates timers, ADC, USART, and I/O in a single 5 V 40-pin PDIP that fits appliance PCBs economically. The OTP memory prevents accidental firmware tampering in the field, and the 200 ns instruction cycle supports real-time tasks like button debouncing, triac zero-crossing control, and sensor sampling. The 33 I/O lines drive seven-segment displays, keypads, and load-switching transistors without external logic.
Được đề xuất
Educational and Prototyping Platforms
The PIC16C67-20I/P is widely adopted in university microcontroller courses and DIY prototyping boards because the 40-pin PDIP is breadboard-friendly and the PIC16C6x RISC architecture has only 35 instructions, easing the learning curve. The ICSP interface allows programming without removing the part, and the rich peripheral set (USART, SSP, ADC, CCP) provides a complete teaching platform for embedded concepts including interrupts, timers, and serial communication.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C67-20I/P — 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 | PIC16F877-20I/P | PIC16C67-20/P | PIC16C67-10I/P |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin PDIP | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same |
| Program Memory Type | OTP EPROM | Flash | OTP EPROM | OTP EPROM |
| Program Memory Size | 14 KB (8K x 14) | 14 KB | 14 KB | 14 KB |
| Maximum Clock Speed | 20 MHz | 20 MHz | 20 MHz | 10 MHz |
| Temperature Range | Industrial -40C to +85C | Industrial -40C to +85C | Commercial 0C to +70C | Industrial -40C to +85C |
| Reprogrammability | No (OTP, one-time programmable) | Yes (flash, >1000 cycles) | No (OTP) | No (OTP) |
| I/O Pins | 33 | 33 | 33 | 33 |
Bảo phân biệt quan trọng
- Wide industrial temperature range in OTP silicon (vsPIC16C67-20/P)
- 20 MHz instruction throughput in 40-pin PDIP (vsPIC16C67-10I/P)
- Lowest unit cost via OTP memory in proven 8-bit core (vsPIC16F877-20I/P)
Ghi chú thiết kế
The PIC16C67-20I/P requires a stable 4.5 V to 5.5 V supply on both VDD pins (pins 11 and 32) with decoupling capacitors placed within a few millimetres of each VDD pin. Recommended values are 100 nF ceramic in parallel with 10 µF tantalum or aluminium polymer on the board-level supply. Brown-out detection and EPROM programming margins both rely on a clean rail; noisy supplies can cause OTP programming failures or spurious resets.
Because program memory is OTP, any bit written in error cannot be erased. Stage firmware in the flash-based PIC16F877-20I/P (same 40-pin PDIP footprint) for development, and only move to the PIC16C67-20I/P once firmware is fully validated. Plan ICSP programming fixtures and verify the programming waveform on the MCLR/VPP, RB6/PGC, and RB7/PGD lines before committing to volume programming.
Place the 20 MHz crystal or resonator close to pins 13 (OSC1) and 14 (OSC2), keeping trace lengths short and guarding both traces with a ground ring to reduce EMI coupling. Keep high-current switching traces (relay drives, triac control) away from the oscillator traces and analog inputs on PORTA. Add a 100 Ω resistor in series with the MCLR line if the pin is driven by a pushbutton or external supervisor, to limit inrush current.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified for automotive; Microchip recommends the PIC16F877A-I/P for automotive-grade designs.
