PIC16C65A-20I/P - 8-Bit 20MHz 7KB OTP MCU 40-PDIP | Microchip
料号： PIC16C65A-20I/P ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.5 | $9.50 |
| 10 | $8.55 | $85.50 |
| 100 | $7.6 | $760.00 |
| 500 | $6.84 | $3,420.00 |
| 1,000 | $6.08 | $6,080.00 |
PIC16C65A-20I/P 概述
What is an 8-bit OTP microcontroller? It is a single-chip computer that integrates a CPU, non-volatile program memory (here OTP EPROM that is programmed once and cannot be electrically erased), RAM, and peripherals. The PIC16C65A belongs to the mid-range PIC microcontrollers (PIC16 family), sitting in the broader hierarchy: microcontroller -> embedded controller -> semiconductor IC. PIC16C parts use a RISC Harvard architecture with 35 single-word instructions, providing deterministic single-cycle execution (except branches, which take two cycles).
Key features include 20MHz maximum operating frequency (5MHz minimum at 4V), wide operating voltage from 2.5V to 6.0V, ultra-low power consumption of 15uA typical at 5V/4MHz and 1uA typical at 3V/32kHz, three hardware timers, an 8-bit A/D converter with 8 input channels, two PWM modules, a USART, and a synchronous serial port (SSP) supporting SPI and I2C. The 40-pin PDIP package is windowed ceramic for prototype development.
The PIC16C65A uses a fully-static CMOS design with separate instruction and data buses (Harvard architecture), 14-bit wide instructions, and an 8-bit data path. Its high-performance RISC core executes most instructions in a single clock cycle, providing 5 MIPS sustained throughput at 20MHz. On-chip peripherals include a watchdog timer with its own on-chip RC oscillator, brown-out reset, and power-on reset.
Typical applications include industrial control systems, motor control, instrumentation, automotive body electronics (non-safety), consumer appliances, and legacy embedded products that require OTP memory for low-cost, high-volume production. The wide voltage range and low-power modes suit battery-backed instrumentation.
When designing with this part, note that OTP memory cannot be erased, so firmware bugs require windowed ceramic packages for UV erasure during development. Engineers should use the flash-based PIC16F77 or PIC16F877A for new designs; the PIC16C65A remains in service for legacy and long-lifecycle industrial products.
This page synthesizes distributor stock, parametric comparison with the flash-based PIC16F77 drop-in successor, and practical design notes for engineers maintaining installed bases.
直接替换替代料： PIC16C65A-20I/P ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16C65A-20I/P （相同外形与封装尺寸） ——差异在于 Package, Timers, Core Architecture, RoHS Status, ADC.
快速对比工具——选择替代料号进行并排对比：
PIC16C65A-20I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC16C65A-20/P
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.85 / 个
查看数据手册 →PIC16C65A-04I/P
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.25 / 个
查看数据手册 →PIC16C65A-20E/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$11.85 / 个
查看数据手册 →PIC16C65A-20E/PQ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.85 / 个
查看数据手册 →PIC16F77-I/P
✅ 直接替换✓ 有现货
$8.4 / 个
查看数据手册 →PIC16C65A-20I/P 最大额定值与电气特性
| Core Architecture | 8-bit PIC16 RISC, Harvard |
| Program Memory | 7KB (4K x 14) OTP EPROM |
| RAM | 192 bytes |
| Data EEPROM | Not present (OTP only) |
| Maximum Clock Speed | 20 MHz |
| Instruction Set Size | 35 instructions (14-bit wide) |
| Operating Voltage | 2.5 V to 6.0 V |
| Typical Supply Voltage | 5 V |
| I/O Pins | 33 |
| A/D Converter | 8-bit, 8 channels |
| PWM Modules | 2 (Capture/Compare/PWM) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Communication | USART (SCI), SSP (SPI/I2C) |
| 封装 | 40-pin PDIP (WDIP), windowed ceramic |
| 工作温度 | -40 C to +85 C (Industrial) |
| 安装类型 | Through-Hole |
| Power Consumption (typ) | 15 uA at 5 V / 4 MHz; 1 uA at 3 V / 32 kHz |
| RoHS 状态 | Compliant |
PIC16C65A-20I/P 引脚配置
| 引脚 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| 引脚 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| 引脚 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / Voltage reference |
| 引脚 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 引脚 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| 引脚 8 | OSC1/CLKIN — Crystal oscillator input / External clock in |
| 引脚 9 | OSC2/CLKOUT — Crystal oscillator output / Clock out |
| 引脚 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock in |
| 引脚 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 PWM output |
| 引脚 12 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| 引脚 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 16 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| 引脚 17 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| 引脚 18 | GND — Ground reference |
| 引脚 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| 引脚 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| 引脚 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| 引脚 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| 引脚 23 | RC4 (RD4)/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| 引脚 24 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| 引脚 25 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| 引脚 26 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| 引脚 27 | VSS — Ground (second pin) |
| 引脚 28 | VDD — Positive supply voltage |
| 引脚 29 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input 5 |
| 引脚 30 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog input 6 |
| 引脚 31 | RE2/CS/AN7 — PORTE bit 2 / Chip select / Analog input 7 |
| 引脚 32 | VSS — Ground (third pin) |
| 引脚 33 | VDD — Positive supply (second pin) |
| 引脚 34 | RB0/INT — PORTB bit 0 / External interrupt |
| 引脚 35 | RB1 — PORTB bit 1 |
| 引脚 36 | RB2 — PORTB bit 2 |
| 引脚 37 | RB3 — PORTB bit 3 |
| 引脚 38 | RB4 — PORTB bit 4 |
| 引脚 39 | RB5 — PORTB bit 5 |
| 引脚 40 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 引脚 41 | RB7/PGD — PORTB bit 7 / ICSP data |
典型应用
PIC16C65A-20I/P 适用于 6 应用s: Industrial Process Control, Motor Control and PWM Drives, Instrumentation and Data Acquisition, Consumer Appliance Control, Automotive Body Electronics (Non-Safety), Legacy Embedded Product Maintenance.
Industrial Process Control
The PIC16C65A-20I/P is well-suited for industrial process controllers and PLCs, providing 33 I/O lines for sensor acquisition and actuator drive, three timers for PWM motor speed control, and a USART for SCADA network communications. Its industrial -40C to +85C temperature range tolerates factory floor conditions, while 5V operation interfaces directly with 5V logic level sensors and 24V industrial signal conditioning circuits through optocouplers. The OTP memory is well-matched to fixed-function industrial equipment with stable firmware, eliminating the need for in-field firmware updates.
推荐
Motor Control and PWM Drives
Two Capture/Compare/PWM (CCP) modules make the PIC16C65A-20I/P a fit for small DC motor control and brushed motor drives. The 8-bit PWM resolution (with 10-bit option via Timer2 configuration) drives MOSFET half-bridges through gate drivers, while the three timers handle quadrature encoder feedback and tachometer sampling. 20MHz clock rate provides 50ns instruction cycle for tight control loops. The wide 2.5-6V operating range accommodates battery-powered or bus-powered motor applications.
推荐
Instrumentation and Data Acquisition
The on-chip 8-bit A/D converter with 8 input channels enables the PIC16C65A-20I/P to digitise analog signals from temperature sensors, pressure transducers, and potentiometers. With 19.5us conversion time at 20MHz, the part samples up to 50ksps aggregate, suitable for low-bandwidth sensor networks. The 192-byte RAM supports small data buffers and rolling averages, while the USART streams data to host PCs or remote displays. Industrial temperature grade and low power consumption (15uA active at 5V/4MHz) suit battery-backed field instruments.
推荐
Consumer Appliance Control
Washing machines, dishwashers, microwave ovens, and HVAC controls benefit from the PIC16C65A-20I/P's combination of OTP memory (low unit cost for high volume) and robust peripheral set. The 33 I/O lines drive keypads, LED/LCD displays, relays, and triac optocouplers, while the USART supports module-to-module communication in appliance networks. The 5V operation and industrial temperature range handle appliance thermal environments. OTP memory is ideal when firmware is fixed at production and no field updates are required.
推荐
Automotive Body Electronics (Non-Safety)
The PIC16C65A-20I/P suits legacy automotive body electronics such as climate control panels, instrument clusters, and accessory modules. The 5V supply aligns with traditional automotive electrical systems, and the industrial -40C to +85C temperature range handles under-dash environments. CAN bus networking is achieved by adding an external MCP2515 CAN controller via SPI. Note that AEC-Q100 qualification is not specified for this part; for safety-critical automotive applications, select AEC-Q100 qualified alternatives.
推荐
Legacy Embedded Product Maintenance
Installed-base products originally designed with the PIC16C65A-20I/P require ongoing spare-part availability for warranty and service replacements. The long-term production commitment from Microchip, combined with multiple package variants (PDIP, TQFP, PLCC) and speed grades (4, 10, 20 MHz), allows repair depots to source exact replacements for legacy systems. The mature tooling ecosystem (MPASM, MPLAB IDE v5 through v8) supports continued firmware maintenance for these long-life products.
推荐
推荐产品汇总
工程参考数据： PIC16C65A-20I/P ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16F77-I/P | PIC16C65A-20/P | PIC16C65A-04I/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 | 7KB (4K x 14) | 7KB Flash | 7KB (4K x 14) | 7KB (4K x 14) |
| RAM | 192 bytes | 368 bytes | 192 bytes | 192 bytes |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 4 MHz |
| Operating Voltage | 2.5 V to 6.0 V | 2.0 V to 5.5 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) |
| A/D Converter | 8-bit, 8 channels | 8-bit, 8 channels | 8-bit, 8 channels | 8-bit, 8 channels |
| ICSP Support | No (OTP only) | Yes (Flash) | No (OTP only) | No (OTP only) |
关键差异点
- OTG legacy compatibility with PIC16C6X family （对比 PIC16F77-I/P)
- Higher maximum clock speed than 04-grade parts （对比 PIC16C65A-04I/P)
- Industrial temperature range for harsh environments （对比 PIC16C65A-20/P)
设计说明
OTP EPROM cannot be electrically erased. During development use the windowed ceramic CERDIP variant (PIC16C65A-20I/W or PIC16C65A-20I/JW) which allows UV erasure with a 30-60 minute exposure to UV light through the package window. The plastic PDIP PIC16C65A-20I/P has no window and is a one-time-programmable production package - a firmware bug means scrap. Always qualify firmware on the windowed variant before committing to OTP volume production.
Estimated: at 5V supply and 20MHz clock, the PIC16C65A-20I/P draws about 5-15mA active, depending on I/O loading and peripheral use. For battery-backed designs use the Sleep mode (current <1uA typical) and wake via Watchdog Timer, external interrupt on RB0/INT, or peripheral interrupt. Brown-Out Reset (BOR) is recommended for industrial applications to prevent undefined operation during supply droop; configure BOR via configuration bits at programming time.
Place the decoupling capacitor (0.1uF ceramic) within 5mm of the VDD pin (pin 28 or 33) with a short trace to the nearest ground. For designs using the parallel slave port (PORTD) at high speed, add a 10uF bulk capacitor near the IC. The crystal or resonator should be located within 10mm of OSC1/OSC2 (pins 8/9) with grounded guard traces on long clock traces to reduce EMI susceptibility.
The 40-pin PDIP footprint uses 2.54mm (0.100 inch) pin pitch and 0.600 inch (15.24mm) row spacing, compatible with standard through-hole PCB prototyping and wire-wrap sockets. For production consider using a TQFP-44 variant (PIC16C65A-20I/PT) for surface-mount assembly. The ICSP pins RB6/PGC (pin 40) and RB7/PGD (pin 41) are usable for in-system programming if migrating to a flash successor like PIC16F77.
合规信息
RoHS and REACH compliant per Microchip product declaration. Not AEC-Q100 qualified - for safety-critical automotive applications select AEC-Q100 qualified PIC16F family alternatives.
