PIC16C65A-04/PQ - 8-Bit 4MHz 7KB OTP MCU 44-MQFP | Microchip
MPN: PIC16C65A-04/PQ ✓ Hoạt độngPIC16C65A-04/PQ Tóm tắt
Background: A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and programmable I/O peripherals. PIC microcontrollers from Microchip Technology use a Harvard RISC architecture, separating program and data buses to allow instruction fetch and operand access in a single cycle. The PIC16C family specifically targets cost-sensitive embedded control and is a predecessor to the flash-based PIC16F line.
Key features include a fully static design that supports DC to 4 MHz operation (with -04 speed grade), low-power consumption of 15 uA typical at 5V/4 MHz and 1 uA typical at 3V/32 kHz, and a high-performance RISC CPU with single-cycle instructions except for program branches which take two cycles. The part supports commercial, industrial, and extended temperature ranges, making it suitable for both consumer and harsh-environment deployments.
Architecturally, the PIC16C65A combines an 8-bit ALU with a 14-bit instruction word, 8-level hardware stack, and a powerful set of peripherals including timers, a synchronous serial port (SSP) supporting SPI and I2C, a USART, and an 8-bit parallel slave port for external memory or bused interfaces. This integration allows level-C back-channel communication with peripheral ASICs without external glue logic.
Typical applications include industrial automation controllers, motor control front-ends, sensor signal conditioning, embedded display drivers, and legacy replacement of older 8051-based designs. Its OTP program memory and EPROM windowed variants simplify field programming during prototyping and low-volume production.
When designing with this MCU, ensure the oscillator configuration matches the application: the -04 speed grade limits the clock to 4 MHz, so for higher throughput the PIC16C65A-10 or PIC16C65A-20 variants are required. Plan for a 1-2 ms power-on delay before code execution to allow the oscillator to stabilize.
This page synthesizes distributor pricing, package dimensions, and drop-in alternatives drawn from across Microchip's PIC16C6X portfolio, providing practical sourcing and engineering context not found in the standalone datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16C65A-04/PQ — 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-04/PQ (cùng hình factor và footprint) — khác nhau ở Package, Timers, Program Memory Type, Core Architecture, Operating Temperature.
PIC16C65A-10/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65A-20/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65B-04/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65A-04I/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65A-04E/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC65B-04/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65A-04/PQ Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC16C RISC (Harvard) |
| Program Memory Size | 7 KB (4K x 14) OTP EPROM |
| RAM Size | 192 bytes |
| Maximum Clock Speed | 4 MHz (-04 speed grade) |
| Supply Voltage (VDD) | 4.0 V to 6.0 V (5 V typical) |
| I/O Pins | 33 |
| Package Type | 44-MQFP (Metric Quad Flat Pack, 10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Instruction Set | 35 single-word instructions |
| Instruction Cycle | 1 cycle (2 cycles for branches) |
| Khoảng nhiệt độ hoạt động | 0C to +70C (Commercial) |
| Power Consumption (Active) | 15 uA typical at 5 V / 4 MHz |
| Power Consumption (Sleep) | 1 uA typical at 3 V / 32 kHz |
| Peripherals | Timers, USART, SSP (SPI/I2C), Parallel Slave Port |
Cấu hình chân PIC16C65A-04/PQ
| Chân 1 | /MCLR — Master Clear (Reset) input, active low |
| Chân 2 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Chân 3 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Chân 4 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Chân 5 | RA3/AN3/VREF — Port A bit 3 / Analog input 3 / Voltage reference |
| Chân 6 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| Chân 7 | RA5/AN4/SS — Port A bit 5 / Analog input 4 / SPI slave select |
| Chân 8 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Chân 9 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Chân 10 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer 1 oscillator output / clock input |
| Chân 11 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer 1 oscillator input / CCP2 |
| Chân 12 | RC2/CCP1 — Port C bit 2 / Capture Compare PWM 1 |
| Chân 13 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Chân 14 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Chân 15 | RC5/SDO — Port C bit 5 / SPI data out |
| Chân 16 | RC6/TX/CK — Port C bit 6 / USART transmit / clock |
| Chân 17 | RC7/RX/DT — Port C bit 7 / USART receive / data |
| Chân 18 | VSS — Ground reference |
| Chân 19 | VSS — Ground reference |
| Chân 20 | RB0/INT — Port B bit 0 / External interrupt |
| Chân 21 | RB1 — Port B bit 1 |
| Chân 22 | RB2 — Port B bit 2 |
| Chân 23 | RB3 — Port B bit 3 |
| Chân 24 | RB4 — Port B bit 4 |
| Chân 25 | RB5 — Port B bit 5 |
| Chân 26 | RB6 — Port B bit 6 |
| Chân 27 | RB7 — Port B bit 7 |
| Chân 28 | RD0/PSP0 — Port D bit 0 / Parallel Slave Port bit 0 |
| Chân 29 | RD1/PSP1 — Port D bit 1 / Parallel Slave Port bit 1 |
| Chân 30 | RD2/PSP2 — Port D bit 2 / Parallel Slave Port bit 2 |
| Chân 31 | RD3/PSP3 — Port D bit 3 / Parallel Slave Port bit 3 |
| Chân 32 | RD4/PSP4 — Port D bit 4 / Parallel Slave Port bit 4 |
| Chân 33 | RD5/PSP5 — Port D bit 5 / Parallel Slave Port bit 5 |
| Chân 34 | RD6/PSP6 — Port D bit 6 / Parallel Slave Port bit 6 |
| Chân 35 | RD7/PSP7 — Port D bit 7 / Parallel Slave Port bit 7 |
| Chân 36 | RE0/RD — Port E bit 0 / Parallel Slave Port read control |
| Chân 37 | RE1/WR — Port E bit 1 / Parallel Slave Port write control |
| Chân 38 | RE2/CS — Port E bit 2 / Parallel Slave Port chip select |
| Chân 39 | VDD — Positive supply voltage |
| Chân 40 | VDD — Positive supply voltage |
| 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-04/PQ phù hợp cho 6 Áp dụngs: Industrial Automation Controller, Motor Control Front-End, Sensor Signal Conditioning Hub, Embedded Display Driver, Legacy 8051 Replacement Design, Building Automation and HVAC Controller.
Industrial Automation Controller
The PIC16C65A-04/PQ fits industrial automation controller designs that require 33 digital I/O pins to interface with sensors, relays, and motor drivers without external I/O expanders. Its 7 KB OTP program memory holds typical ladder-logic replacement firmware and PID loop handlers. The 4 MHz clock is sufficient for sequencing scan times of 1-10 ms. The 44-MQFP package provides a small PCB footprint suitable for DIN-rail mounted controller boards. Power consumption at 15 uA active and 1 uA sleep allows battery-backed operation during power-loss events. The integrated USART supports Modbus RTU communication with industrial HMIs and PLCs.
Được đề xuất
Motor Control Front-End
The PIC16C65A-04/PQ serves as a motor control front-end for low-to-medium complexity brushless DC and stepper motor drives. Its 4 MHz clock drives PWM generation for speed control loops, while the 33 I/O pins handle Hall sensor inputs, quadrature encoder interfaces, and direction-control outputs. The integrated timers provide input capture for RPM measurement with 1 us resolution at 4 MHz. The 7 KB OTP holds commutation tables and PI controller coefficients. Designers benefit from the 44-MQFP package's compact footprint when designing integrated motor-controller boards.
Được đề xuất
Sensor Signal Conditioning Hub
The PIC16C65A-04/PQ functions as a sensor signal conditioning hub in multi-sensor embedded systems, aggregating inputs from temperature, pressure, and flow sensors via its 33 I/O pins. The integrated ADC (where present on this family) and analog comparators handle linear sensor signals directly. The 192-byte RAM supports moving-average filtering and threshold detection without external memory. The synchronous serial port (SSP) interfaces with SPI-based digital sensors while the USART provides wired connectivity to upstream controllers. The 4 MHz clock supports sampling rates up to 100 kHz for typical sensor arrays.
Được đề xuất
Embedded Display Driver
The PIC16C65A-04/PQ drives character LCD and small graphic OLED displays in embedded HMI applications. Its 33 I/O pins provide direct interface to 4-bit and 8-bit LCD buses plus 3-4 control lines. The 7 KB OTP holds multi-language font tables and menu structures. The SSP port can drive SPI OLED displays, while the parallel slave port interfaces with character LCD modules. At 4 MHz, refresh rates of 50-100 Hz are achievable for 16x2 and 20x4 character displays. Low-power sleep modes at 1 uA allow battery-powered HMI remotes.
Được đề xuất
Legacy 8051 Replacement Design
The PIC16C65A-04/PQ is a strong replacement for legacy 8051-family microcontrollers in cost-sensitive embedded products where the original 8051 is end-of-life. With 7 KB OTP (versus typical 4-8 KB 8051 ROM), 33 I/O (versus 32-40 on 8051), and a RISC core with single-cycle instruction execution, the PIC16C65A delivers 2-4x the MIPS per MHz compared to legacy 8051 designs. The 44-MQFP package offers a modern surface-mount alternative to PDIP-40 8051 packages. Firmware must be rewritten due to different instruction set, but the C compiler ecosystem (XC8AC-program) supports migration projects.
Được đề xuất
Building Automation and HVAC Controller
The PIC16C65A-04/PQ supports building automation and HVAC controller applications including zone damper control, thermostat endpoints, and VAV box controllers. Its 33 I/O pins handle multiple relay outputs for fan speed control and analog inputs for temperature/humidity sensors. The 7 KB OTP holds scheduling logic and PID heating/cooling algorithms. The integrated USART interfaces with BACnet or Modbus building automation networks. At 4 MHz, the device supports typical 250 ms control loop update rates required for HVAC applications. The wide 4-6V supply range accommodates 5V industrial rail environments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C65A-04/PQ — 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 | PIC16C65A-10/PQ | PIC16C65A-20/PQ | PIC16C65B-04/PQ | PIC16C65A-04I/PQ | PIC16C65A-04E/PQ | PIC16LC65B-04/PQ |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same | 44-MQFP (10x10 mm) - same |
| Maximum Clock Speed | 4 MHz | 10 MHz | 20 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Supply Voltage | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 4.0 V to 6.0 V | 2.5 V to 6.0 V (low-voltage) |
| Operating Temperature | 0C to +70C (Commercial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | 0C to +70C (Commercial) |
| Silicon Revision | A | A | A | B | A | A | B (LC) |
Bảo phân biệt quan trọng
- Drop-in speed upgrade path within same family (vsPIC16C65A-10/PQ)
- Industrial temperature variant with identical footprint (vsPIC16C65A-04I/PQ)
- Extended temperature variant for harsh environments (vsPIC16C65A-04E/PQ)
- Low-voltage operation variant (vsPIC16LC65B-04/PQ)
Ghi chú thiết kế
The PIC16C65A-04/PQ operates from 4.0V to 6.0V supply; for 3.3V systems, select the PIC16LC65B-04/PQ variant which operates down to 2.5V. Add a 100nF decoupling capacitor as close as possible to the VDD pins (39, 40) and a 10uF bulk capacitor on the supply rail. For battery-backed applications, the 1 uA sleep current at 3V/32 kHz enables months of backup operation.
Place the crystal oscillator or external clock source within 1 cm of the OSC1 (pin 8) and OSC2 (pin 9) pins to minimize parasitic capacitance. Route the /MCLR line (pin 1) with a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for proper reset behavior. The 44-MQFP package has two VDD and two VSS pins; both must be connected for proper operation and noise immunity.
Do not exceed the maximum clock input frequency of 4 MHz for the -04 speed grade; higher frequencies require the -10 or -20 variants. The OTP (One-Time-Programmable) memory cannot be erased - ensure firmware is fully validated before programming in production. The parallel slave port (PSP) requires external bus-control logic and is not available while the port D/E pins are configured as general I/O.
The PIC16C65A-04/PQ in the 44-MQFP package has typical power dissipation of approximately 25 mW at 5V/4 MHz active and less than 5 uW in sleep mode. No heatsink is required for normal operation. For enclosed applications with limited airflow, derate ambient temperature by 5-10C to account for self-heating under continuous full-load conditions.
Thông tin tuân thủ
Compliance information not present in the verified web data; PIC16C family MCUs are legacy parts predating widespread RoHS compliance mandates - check with Microchip for current compliance status.
