PIC16C65A-20I/L - 8-Bit 20MHz OTP MCU 7KB EPROM 44-PLCC | Microchip
MPN: PIC16C65A-20I/L ✓ Hoạt độngPIC16C65A-20I/L Tóm tắt
A PIC microcontroller is a Harvard-architecture RISC device that integrates a CPU, non-volatile program memory, RAM, and peripherals (timers, ADC, USART, I/O) into a single chip. PIC microcontrollers sit within the broader category of microcontrollers -> microcomputers -> semiconductors, and the PIC16C sub-family specifically targets low-power, high-throughput embedded control with 35 single-word instructions, single-cycle execution (except branches which take two cycles), and a fully static design.
Key features of the PIC16C65A-20I/L include a wide operating voltage range of 2.5 V to 6.0 V, low power consumption of 15 uA typical at 5 V / 4 MHz and 1 uA typical at 3 V / 32 kHz, and an integrated peripheral set with timers, capture/compare/PWM modules, a synchronous/asynchronous serial port (USART/SCI), and a parallel slave port. The wide operating voltage supports both 3.3 V and 5 V system designs, while the OTP memory is one-time programmable for low-cost, high-volume production.
The architecture uses a 14-bit instruction word with an 8-bit data path and a 35-instruction RISC core, enabling deterministic single-cycle execution (200 ns per instruction at 20 MHz). The fully static design supports DC operation down to 0 Hz, useful for clock-synchronous power-saving modes.
Typical applications include industrial automation controllers, motor control front-ends, embedded instrumentation, and legacy equipment retrofits. The 33 I/O pins and parallel slave port allow direct interface to external memories, keypads, displays, and analog front-ends. The wide 2.5 V to 6.0 V supply range also suits battery-powered and automotive 12 V-bus systems with simple regulators.
When designing with this device, account for OTP memory limitations: once programmed, the firmware cannot be changed. For prototyping or field-updatable firmware, prefer the flash-based PIC16F877A in the same 44-pin PLCC footprint. Always validate interrupt latency and branch-cycle timing against the 200 ns instruction budget for time-critical routines.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16C65A-20I/L — 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 PIC16C65A-20I/L (cùng hình factor và footprint) — khác nhau ở Program Memory Size, Operating Temperature, Mounting Type, Core Architecture, Package.
PIC16C65B-20I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C66-20I/L
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C67-20I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F877A-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C64A-20I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C65A-20I/L Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14 words) |
| RAM Size | 192 bytes |
| Tần số xung maksimum | 20 MHz |
| Instruction Cycle Time | 200 ns (at 20 MHz) |
| Supply Voltage Range | 2.5 V to 6.0 V |
| Typical Supply Current | 15 uA at 5 V / 4 MHz |
| Low-Power Supply Current | 1 uA typical at 3 V / 32 kHz |
| Number of I/O Pins | 33 |
| Instruction Set Size | 35 single-word instructions |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 44-pin PLCC (16.59 x 16.59 mm) |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân PIC16C65A-20I/L
| Chân 1 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / Voltage reference negative |
| Chân 2 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / Voltage reference positive |
| Chân 3 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 4 | RA5/SS/AN4 — PORTA bit 5 / SPI slave select / Analog input 4 |
| Chân 5 | RE0/RD/AN5 — PORTE bit 0 / Parallel slave port read / Analog input 5 |
| Chân 6 | RE1/WR/AN6 — PORTE bit 1 / Parallel slave port write / Analog input 6 |
| Chân 7 | RE2/CS/AN7 — PORTE bit 2 / Parallel slave port chip select / Analog input 7 |
| Chân 8 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Chân 9 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Chân 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / Capture Compare PWM 2 |
| Chân 12 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM 1 |
| Chân 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 16 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| Chân 17 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| Chân 18 | VSS — Ground reference |
| Chân 19 | VDD — Positive supply voltage (2.5 V to 6.0 V) |
| Chân 20 | RB0/INT — PORTB bit 0 / External interrupt input |
| Chân 21 | RB1 — PORTB bit 1 |
| Chân 22 | RB2 — PORTB bit 2 |
| Chân 23 | RB3/PGM — PORTB bit 3 / Low-voltage programming input |
| Chân 24 | RB4 — PORTB bit 4 |
| Chân 25 | RB5 — PORTB bit 5 |
| Chân 26 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 27 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 28 | RD0/PSP0 — PORTD bit 0 / Parallel slave port bit 0 |
| Chân 29 | RD1/PSP1 — PORTD bit 1 / Parallel slave port bit 1 |
| Chân 30 | RD2/PSP2 — PORTD bit 2 / Parallel slave port bit 2 |
| Chân 31 | RD3/PSP3 — PORTD bit 3 / Parallel slave port bit 3 |
| Chân 32 | RD4/PSP4 — PORTD bit 4 / Parallel slave port bit 4 |
| Chân 33 | RD5/PSP5 — PORTD bit 5 / Parallel slave port bit 5 |
| Chân 34 | RD6/PSP6 — PORTD bit 6 / Parallel slave port bit 6 |
| Chân 35 | RD7/PSP7 — PORTD bit 7 / Parallel slave port bit 7 |
| Chân 36 | VSS — Ground reference |
| Chân 37 | VDD — Positive supply voltage (2.5 V to 6.0 V) |
| Chân 38 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Chân 39 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Chân 40 | MCLR/VPP — Master clear reset / Programming voltage input |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16C65A-20I/L phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, Motor Control Front-Ends, Embedded Instrumentation and Data Loggers, Legacy Equipment Retrofits, Automotive 12 V Bus Embedded Modules, HMI Keypad and Display Controllers.
Industrial Automation Controllers
The PIC16C65A-20I/L's industrial temperature grade (-40 C to +85 C), wide 2.5 V to 6.0 V supply range, and 33 I/O pins make it ideal for industrial automation controllers interfacing sensors, actuators, and HMI panels. With 20 MHz RISC core delivering 5 MIPS, the device handles PID loops, sequencing logic, and Modbus/serial communication within PLCs and machine controllers. The OTP memory secures proprietary control algorithms from external read-back, while 192 bytes RAM supports data buffering. Place decoupling capacitors (100 nF + 10 uF) close to VDD/VSS pins; use the USART module for RS-232/RS-485 links to remote I/O. The PLCC-44 socket allows field replacement without soldering. Compared to modern ARM Cortex-M0 MCUs, the PIC16C65A-20I/L consumes only 15 uA at 5 V / 4 MHz, extending battery-backed sensor node operation.
Được đề xuất
Motor Control Front-Ends
The PIC16C65A-20I/L provides capture/compare/PWM (CCP) modules and a 20 MHz instruction cycle time (200 ns) suitable for motor control front-ends driving brushed DC, stepper, or BLDC motors via external MOSFET drivers. The 33 I/O pins can drive direction/Enable lines, Hall-effect sensor inputs, and quadrature encoder feedback. With 7 KB OTP program memory, complete field-oriented control or trapezoidal commutation routines fit comfortably. The wide 2.5 V to 6.0 V supply accepts 5 V regulator rails typical of industrial 24 V bus systems. Note: PWM frequency is limited by the 8-bit timer resolution at 20 MHz - use the CCP module in PWM mode with prescaler for motor-drive switching frequencies of 10-20 kHz. Pair with IR2104 gate drivers for half-bridge control.
Được đề xuất
Embedded Instrumentation and Data Loggers
With 7 KB OTP program memory, 192 bytes RAM, and an integrated USART, the PIC16C65A-20I/L forms the core of embedded instrumentation such as digital panel meters, environmental monitors, and portable data loggers. The 15 uA typical supply current at 5 V / 4 MHz and 1 uA at 3 V / 32 kHz enables battery-backed operation with months of standby life. Connect external 12-bit ADC chips via SPI or I2C for precision measurement of temperature, pressure, or flow sensors. The parallel slave port allows direct interface to LCD modules or external data memory. Use the 33 I/O pins for keypad scanning, alarm outputs, and indicator LEDs. OTP memory secures calibration coefficients and proprietary measurement algorithms from reverse engineering.
Được đề xuất
Legacy Equipment Retrofits
The PIC16C65A-20I/L is well-suited as a drop-in replacement for obsolete PIC16C65-20/P or PIC16C65-20I/L parts in legacy industrial equipment, instrumentation, and aerospace systems where PCB redesign is not feasible. Its 44-pin PLCC footprint and pin-compatible PIC16C6x architecture allow direct socketed replacement with the latest silicon revision. The OTP memory ensures firmware compatibility with original control code, while the 20 MHz clock matches existing timing budgets. Industrial temperature grade (-40 C to +85 C) accommodates factory-floor thermal environments. Always verify peripheral pin assignments against the legacy schematic before substitution. Microchip's PIC16C65B-20I/L revision is preferred when available for errata fixes.
Được đề xuất
Automotive 12 V Bus Embedded Modules
With its wide 2.5 V to 6.0 V operating supply range and industrial temperature grade, the PIC16C65A-20I/L can be deployed in automotive 12 V bus embedded modules when paired with a 5 V regulator such as the LM7805. The 33 I/O pins interface with sensors, solenoids, indicator LEDs, and CAN/LIN transceivers for body control, instrument cluster peripherals, and HVAC actuators. The 20 MHz RISC core delivers deterministic 200 ns instruction cycles for time-critical signal sampling. OTP memory secures proprietary calibration data. The 44-pin PLCC package, however, is not automotive-qualified (no AEC-Q100) - this is an industrial-grade part, so automotive deployments require additional qualification. For new automotive designs, prefer PIC18F or dsPIC AEC-Q100-qualified parts.
Được đề xuất
HMI Keypad and Display Controllers
The PIC16C65A-20I/L drives HMI panels with 4x4 or larger keypads and character or graphic LCDs through its parallel slave port and 33 I/O pins. With 20 MHz instruction speed, matrix keypad scanning, debouncing, and character display updates occur within microseconds, leaving CPU bandwidth for application logic. Connect HD44780-based character LCDs directly via PORT B and PORT D, or interface with graphic LCDs via the parallel slave port for higher throughput. The USART enables communication with main controllers or remote terminals. OTP memory stores keypad mapping tables and UI state machines, while 192 bytes RAM buffers scanned key events. Industrial temperature grade supports factory HMI panels with extended thermal envelopes. Pair with a MAX232 for RS-232 HMI terminals.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C65A-20I/L — 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 | PIC16C65B-20I/L | PIC16C66-20I/L | PIC16C67-20I/L | PIC16F877A-I/L | PIC16C64A-20I/L |
|---|---|---|---|---|---|---|
| Package | 44-pin PLCC | 44-pin PLCC - same | 44-pin PLCC - same | 44-pin PLCC - same | 44-pin PLCC - same | 44-pin PLCC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7 KB OTP | 7 KB OTP | 14 KB OTP | 14 KB OTP | 14 KB Flash | 3.5 KB OTP |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash | OTP EPROM |
| RAM | 192 bytes | 192 bytes | 368 bytes | 368 bytes | 368 bytes | 128 bytes |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Temperature Grade | Industrial (-40 to +85 C) | Industrial | Industrial | Industrial | Industrial | Industrial |
Bảo phân biệt quan trọng
- Wide 2.5 V to 6.0 V supply range (vsPIC16F877A-I/L)
- OTP memory for code security (vsPIC16F877A-I/L)
- Ultra-low standby current (vsPIC16C64A-20I/L)
Ghi chú thiết kế
Decouple VDD/VSS pairs (pins 19/18 and 37/36) with a 100 nF ceramic capacitor placed within 5 mm of each pin pair, plus a 10 uF bulk capacitor on the main VDD rail. The PIC16C65A-20I/L has separate analog (VDD/VSS) and digital supply regions - keep analog VDD/VSS clean by routing them separately from switching digital loads. Estimated: at 20 MHz / 5 V the supply current is approximately 15-25 mA depending on peripheral activity; budget accordingly for the LDO or switching regulator upstream.
OTP memory is one-time programmable - firmware bugs cannot be corrected after programming. Use a PIC16F877A-I/L socket-compatible part for development and qualification, then move to PIC16C65A-20I/L for production once firmware is locked. Always preserve a known-good programmed unit as a reference. Verify interrupt vector placement and branch-cycle timing against the 200 ns instruction budget (branches take 400 ns) for time-critical routines.
Place the crystal or ceramic resonator within 10 mm of pins 8 (OSC1) and 9 (OSC2), with ground-plane isolation around the oscillator traces to reduce EMI. Use a MCLR pull-up (typically 10 kohm) on pin 40 to ensure clean reset behavior; the MCLR pin is internally pulled high but external pull-up is required for noisy environments. Route the parallel slave port (PORTD and pins 5/6/7 of PORTE) with matched trace lengths if used for external memory interfacing.
The 20 MHz oscillator generates harmonics up to 100+ MHz; keep clock traces short and guard with ground plane to prevent radiated EMI. Estimated: enable the watchdog timer and brown-out reset (configurable in the CONFIG word) for unattended industrial deployments. If using the ADC, ensure adequate acquisition time (minimum 20 us at 5 V) and bypass AVSS/AVDD with 100 nF + 10 uF caps. The 33 I/O pins source/sink up to 25 mA each (per pin) and 90 mA per port - observe these limits when driving LEDs directly.
Thông tin tuân thủ
RoHS/REACH/lead-free compliance not explicitly stated in verified web data. Not AEC-Q100 qualified - this is an industrial-grade part. For automotive applications, use AEC-Q100-qualified PIC18F or dsPIC variants instead.
