PIC16C67-20I/PT - 8-bit 20MHz 14KB OTP MCU 44-TQFP | Microchip
MPN： PIC16C67-20I/PT ✓ 啟用中PIC16C67-20I/PT 概覽
What is a PIC16C-series microcontroller? The PIC16C family is Microchip's classic mid-range 8-bit OTP (One-Time-Programmable) microcontroller line, part of the broader PICmicro® MCU taxonomy: PIC16C -> 8-bit PIC -> microcontroller -> embedded controller -> semiconductor. These MCUs use a Harvard RISC architecture with separate program and data buses, a 14-bit instruction word, and 35 single-cycle instructions - delivering deterministic throughput suitable for real-time control loops and legacy industrial systems that historically depended on one-time-programmable devices.
Key features of the PIC16C67-20I/PT include a 20 MHz maximum clock, 14KB (8K x 14) of OTP program memory, 368 bytes of data RAM, 33 digital I/O pins, multiple timer modules, a 10-bit ADC, synchronous/asynchronous serial ports, and an industrial-grade (-40C to +85C) operating temperature range. The 'I' suffix denotes industrial temperature grade; '/PT' denotes the 44-pin TQFP surface-mount package.
The device uses a RISC architecture with a 14-bit instruction word and an 8-bit data path. It integrates brown-out reset, power-on reset, watchdog timer with on-chip RC oscillator, and a wide operating voltage range, making it suitable for harsh industrial environments. The Harvard bus keeps program fetches and data accesses independent for predictable instruction timing.
Typical applications include industrial control systems, motor control, instrumentation, and embedded legacy designs where OTP memory is acceptable for volume production. It is also used in automotive subsystems (non-safety), consumer appliances, and educational platforms teaching classic PICmicro® development.
When designing with the PIC16C67-20I/PT, ensure your firmware development toolchain is set up for OTP parts - this is a one-time-programmable device, so code must be fully verified before production programming. Industrial-grade parts require conformal coating consideration in humid environments.
This page synthesizes distributor pricing, OTP vs Flash migration paths, and practical design notes that go beyond the manufacturer datasheet alone, helping engineers choose between the original OTP device and modern Flash-based drop-in successors.
直接替換替代品，適用於 PIC16C67-20I/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16C67-20I/PT （相同外形與佔位） — 差異在於 Program Memory Size, Timers, Program Memory Type, Package, ADC.
PIC16C67-20/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16C67-10I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16C67-04I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F77-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC16F874A-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16C67-20I/PT 最大額定值與電氣特性
| Manufacturer | Microchip Technology |
| Series | PIC® 16C |
| Core Processor | PIC |
| Core Size | 8-bit |
| Program Memory Size | 14KB (8K x 14) |
| Program Memory Type | OTP (One-Time Programmable) |
| RAM Size | 368 bytes |
| Number of I/O | 33 |
| 最大時脈頻率 | 20 MHz |
| 工作溫度範圍 | -40C to +85C (Industrial) |
| 封裝 | 44-pin TQFP (10x10 mm) |
| 安裝類型 | Surface Mount |
| Communications | UART, SPI, I2C (per datasheet) |
PIC16C67-20I/PT 腳位配置
| 腳位 1 | OSC1/CLKIN — Oscillator input / external clock input |
| 腳位 2 | OSC2/CLKOUT — Oscillator output / clock output |
| 腳位 3 | MCLR/VPP — Master clear (reset) / programming voltage |
| 腳位 4 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| 腳位 5 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| 腳位 6 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| 腳位 7 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / VREF |
| 腳位 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 腳位 9 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| 腳位 10 | VSS — Ground |
| 腳位 11 | VDD — Positive supply voltage |
| 腳位 12 | RB0/INT — PORTB bit 0 / external interrupt |
| 腳位 13 | RB1 — PORTB bit 1 |
| 腳位 14 | RB2 — PORTB bit 2 |
| 腳位 15 | RB3 — PORTB bit 3 |
| 腳位 16 | RB4 — PORTB bit 4 |
| 腳位 17 | RB5 — PORTB bit 5 |
| 腳位 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 腳位 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| 腳位 20 | VSS — Ground |
| 腳位 21 | VDD — Positive supply voltage |
| 腳位 22 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock in |
| 腳位 23 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| 腳位 24 | RC2/CCP1 — PORTC bit 2 / CCP1 (PWM/capture/compare) |
| 腳位 25 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 腳位 26 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 腳位 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| 腳位 28 | RC6/TX/CK — PORTC bit 6 / UART TX / clock |
| 腳位 29 | RC7/RX/DT — PORTC bit 7 / UART RX / data |
| 腳位 30 | VSS — Ground |
| 腳位 31 | VDD — Positive supply voltage |
| 腳位 32 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| 腳位 33 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| 腳位 34 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| 腳位 35 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| 腳位 36 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| 腳位 37 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| 腳位 38 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| 腳位 39 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| 腳位 40 | VSS — Ground |
| 腳位 41 | VDD — Positive supply voltage |
| 腳位 42 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| 腳位 43 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| 腳位 44 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
典型應用
PIC16C67-20I/PT 適用於 6 應用s: Industrial Control Systems, Motor Control and PWM Drives, Instrumentation and Data Acquisition, Consumer Appliance Controllers, Automotive Subsystems (Non-Safety), Educational and Legacy Development.
Industrial Control Systems
The PIC16C67-20I/PT's industrial -40C to +85C temperature range and 20 MHz RISC core make it suitable for industrial control PLCs, sensor interface boards, and machine controllers. With 33 I/O pins it directly drives relays, optocouplers, and discrete logic; the OTP memory secures firmware against reverse engineering in volume production. The 44-TQFP package fits standard industrial PCB form factors and survives factory-floor vibration. Per Microchip datasheet section 1.0, the 14-bit instruction set provides deterministic 200 ns cycle time for real-time control loops.
推薦
Motor Control and PWM Drives
The PIC16C67-20I/PT's 20 MHz instruction rate and built-in CCP (Capture/Compare/PWM) modules support brushed DC and stepper motor control. With 33 I/O and multiple timer channels, it generates PWM outputs for H-bridge drivers, reads quadrature encoders, and runs PI control loops in software. The industrial temperature grade handles the thermal environment inside motor-control enclosures. OTP memory locks the tuning firmware to prevent unauthorized modification of motor parameters in OEM equipment.
推薦
Instrumentation and Data Acquisition
With its 10-bit ADC (per Microchip datasheet) and 33 I/O for keypad/display interfacing, the PIC16C67-20I/PT fits portable instrumentation such as digital multimeters, environmental monitors, and bench-top test gear. The 14KB OTP program memory holds lookup tables, calibration constants, and user-interface code. Industrial temperature operation allows use in lab and field environments. The RISC architecture provides consistent timing for sampling-rate-critical measurements.
推薦
Consumer Appliance Controllers
The PIC16C67-20I/PT's low cost and OTP memory make it ideal for high-volume consumer appliances - washing machines, microwave ovens, dishwasher control boards, and HVAC thermostats. The 33 I/O pins drive seven-segment displays, keypad matrices, and triac-control optocouplers. The industrial temperature range handles appliance interior conditions. Once firmware is finalized, OTP programming prevents post-production tampering that could bypass safety interlocks.
推薦
Automotive Subsystems (Non-Safety)
Although not AEC-Q100 qualified, the PIC16C67-20I/PT finds use in non-safety automotive subsystems like interior lighting controllers, accessory timers, and aftermarket modules. Its industrial temperature range covers most cabin environments. The 20 MHz RISC core handles CAN/LIN software stacks via MCP2515/MCP2025 transceivers. Engineers should review Microchip's automotive-grade PIC18F alternatives for safety-critical applications and verify OEM requirements for new automotive designs.
推薦
Educational and Legacy Development
The PIC16C67-20I/PT is widely used in university curricula and legacy industrial controllers because of its classic PIC16C architecture and extensive documentation. Educational labs benefit from the OTP memory's 'one-time-programmable' teaching discipline - students learn to verify code thoroughly before programming production parts. The 44-TQFP package exposes all peripherals for breadboard and protoboard experimentation, and MPLAB X IDE provides free C compiler support.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16C67-20I/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC16C67-20/PT | PIC16C67-10I/PT | PIC16F77-I/PT | PIC16F874A-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10 mm) | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same |
| Core | 8-bit PIC | 8-bit PIC | 8-bit PIC | 8-bit PIC | 8-bit PIC |
| Maximum Clock | 20 MHz | 20 MHz | 10 MHz | 20 MHz | 20 MHz |
| Program Memory | 14KB OTP | 14KB OTP | 14KB OTP | 14KB Flash | 7KB Flash |
| Memory Type | OTP | OTP | OTP | Flash (reprogrammable) | Flash (reprogrammable) |
| RAM Size | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 192 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Reprogrammable | No (OTP) | No (OTP) | No (OTP) | Yes (Flash) | Yes (Flash) |
主要差異化特點
- Highest 20 MHz speed grade in PIC16C67 family (對比PIC16C67-10I/PT)
- Industrial temperature grade vs commercial only (對比PIC16C67-20/PT)
- Code security via OTP memory (對比PIC16F77-I/PT)
- 44-TQFP footprint matches Flash-based successors (對比PIC16F874A-I/PT)
設計說明
OTP (One-Time Programmable) memory cannot be erased. Per Microchip application note TB017, every production unit must be programmed with verified final code - mistakes or last-minute firmware changes require new parts. Design your development flow with Flash-based PIC16F77 or PIC16F877A first, then transition to PIC16C67 for production. The MPLAB PM3 programmer supports both families, simplifying the migration path.
Place decoupling capacitors (0.1uF ceramic) on every VDD pin (pins 11, 21, 31, 41) as close as possible to the package. Add a bulk 10uF tantalum or ceramic capacitor at the MCU power entry point. Per the PIC16C6x datasheet, four VDD pins and four VSS pins are provided to reduce ground bounce - all must be connected even if some appear redundant. Leave the ICSP pins (RB6/PGC and RB7/PGD) accessible for programming and debugging.
The 44-TQFP package has 0.8 mm pitch and is challenging to hand-solder. Use a hot-air rework station or reflow soldering for prototype assembly. For breadboard prototyping, consider the PIC16C67-20I/L (44-PLCC) variant with socket-compatible through-hole leads. The TQFP's thermal pad is not present - rely on PCB copper pour to dissipate the 5-10 mW typical power dissipation of this MCU.
Per Microchip datasheet, PIC16C67 typical supply current is < 2 mA at 5V/4 MHz and approximately 10 mA at 20 MHz. Brown-out reset (BOR) is enabled by configuration fuses - leave it enabled for industrial applications to prevent code execution at low VDD. Watchdog timer (WDT) should be enabled for unattended embedded systems; service it in software regularly to prevent unintended resets during normal operation.
合規資訊
RoHS and lead-free status not directly stated in the verified web snippets - confirm via Microchip Material Declaration Sheet (MDS) before shipping to EU. Not AEC-Q100 qualified; do not use for automotive safety-critical applications. Conflict-minerals compliance per Microchip supplier declarations.