PIC16C65A-04E/PQ - 8-bit 4MHz MCU, 7KB OTP, 44-MQFP | Microchip
料号： PIC16C65A-04E/PQ ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.92 | $89.20 |
| 100 | $7.45 | $745.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.25 | $5,250.00 |
PIC16C65A-04E/PQ 概述
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripherals around an 8-bit data bus. The PIC16C family uses a Harvard RISC architecture with only 35 single-word instructions, where most instructions execute in a single instruction cycle (4 clock periods). The PIC16C65A-04E/PQ sits within the broader PIC microcontroller hierarchy: PIC16C65A -> PIC16C6X sub-family -> PIC16C family -> 8-bit PIC microcontrollers -> Microchip MCU portfolio -> embedded semiconductors.
Key features include 33 digital I/O pins, three serial communication peripherals (I2C/SPI via the Synchronous Serial Port, plus a USART), 8 channels of 8-bit analog-to-digital conversion, a Capture/Compare/PWM module, two 8-bit timers and one 16-bit timer, and a programmable watchdog timer. Power consumption is rated at 15 µA typical at 5 V/4 MHz and as low as 1 µA typical at 3 V/32 kHz, enabling low-power and battery-friendly designs. The "04E" suffix denotes a 4 MHz maximum clock with the Extended temperature range (-40C to +125C).
Architecturally, the device is built on Microchip's high-performance CMOS EPROM technology with a fully static design that allows the clock to be stopped without losing register state. The 14-bit instruction word delivers compact code density, and the 8-bit-wide data path keeps peripheral interfacing straightforward for legacy 5 V designs. Brown-out Reset, Power-on Reset, and a Watchdog Timer with its own on-chip RC oscillator provide robust unsupervised operation in industrial environments.
Typical applications include industrial control and automation, HVAC and appliance controllers, motor control front-ends, automotive body electronics, smart sensors, and legacy embedded systems requiring 5 V-tolerant I/O with USART, I2C, and SPI. The Extended temperature grade makes the part suitable for under-hood and outdoor installations.
When designing with this part, ensure your firmware uses the PIC16C6X instruction set and that code does not exceed 4K instruction words. The OTP memory is one-time programmable, so plan for in-system programming or windowed Ceramic packages for prototype development.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： PIC16C65A-04E/PQ ——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-04E/PQ （相同外形与封装尺寸） ——差异在于 Program Memory Size, ADC, Core Architecture, Operating Temperature Range, Package.
快速对比工具——选择替代料号进行并排对比：
PIC16C65A-04/PQ
✅ 直接替换✓ 有现货
$6.2 / 个
查看数据手册 →PIC16C65B-04E/PQ
✅ 直接替换✓ 有现货
$11.1 / 个
查看数据手册 →PIC16C65A-04I/PQ
✅ 直接替换✓ 有现货
$9.95 / 个
查看数据手册 →PIC16C66-04E/PQ
✅ 直接替换📋 参考替代料（不在目录中）
PIC16C67-04E/PQ
✅ 直接替换✓ 有现货
$4.91 / 个
查看数据手册 →PIC16F877A-04I/PQ
✅ 直接替换📋 参考替代料（不在目录中）
PIC16C65A-04E/PQ 最大额定值与电气特性
| Core | PIC16C 8-bit RISC |
| Instruction Set | PIC16C6X, 35 instructions, 14-bit word |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| Data RAM | 192 x 8 bytes |
| 最大时钟频率 | 4 MHz |
| I/O Pins | 33 |
| ADC | 8 channels, 8-bit (per family datasheet) |
| Timers | 2 x 8-bit + 1 x 16-bit |
| CCP Modules | 1 Capture/Compare/PWM |
| Serial Interfaces | I2C (SSP), SPI (SSP), USART |
| 封装 | 44-MQFP (PQ), 10x10 mm |
| 安装类型 | Surface Mount |
| Packaging | Tray |
| 工作温度 | -40C to +125C (Extended, "E" suffix) |
| RoHS 状态 | unknown |
PIC16C65A-04E/PQ 引脚配置
| 引脚 1 | MCLR — Master Clear (reset) input, active low |
| 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 / ADC VREF+ |
| 引脚 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 引脚 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SSP slave select |
| 引脚 8 | RE0/RD/AN5 — PORTE bit 0 / Parallel port read / Analog input 5 |
| 引脚 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel port write / Analog input 6 |
| 引脚 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel port chip select / Analog input 7 |
| 引脚 11 | VDD — Positive digital supply |
| 引脚 12 | VSS — Digital ground |
| 引脚 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| 引脚 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| 引脚 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| 引脚 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| 引脚 17 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM 1 |
| 引脚 18 | RC3/SCK/SCL — PORTC bit 3 / SSP serial clock (SPI/I2C) |
| 引脚 19 | RC4/SDI/SDA — PORTC bit 4 / SSP data in (SPI) / data (I2C) |
| 引脚 20 | RC5/SDO — PORTC bit 5 / SSP data out (SPI) |
| 引脚 21 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| 引脚 22 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| 引脚 23 | RD0 — PORTD bit 0 (parallel slave port data) |
| 引脚 24 | RD1 — PORTD bit 1 (parallel slave port data) |
| 引脚 25 | RD2 — PORTD bit 2 (parallel slave port data) |
| 引脚 26 | RD3 — PORTD bit 3 (parallel slave port data) |
| 引脚 27 | RD4 — PORTD bit 4 (parallel slave port data) |
| 引脚 28 | RD5 — PORTD bit 5 (parallel slave port data) |
| 引脚 29 | RD6 — PORTD bit 6 (parallel slave port data) |
| 引脚 30 | RD7 — PORTD bit 7 (parallel slave port data) |
| 引脚 31 | VSS — Digital ground |
| 引脚 32 | VDD — Positive digital supply |
| 引脚 33 | RB0/INT — PORTB bit 0 / external interrupt |
| 引脚 34 | RB1 — PORTB bit 1 |
| 引脚 35 | RB2 — PORTB bit 2 |
| 引脚 36 | RB3/PGM — PORTB bit 3 / Low-voltage programming |
| 引脚 37 | RB4 — PORTB bit 4 |
| 引脚 38 | RB5 — PORTB bit 5 |
| 引脚 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 引脚 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| 引脚 41 | AVDD — Positive analog supply |
| 引脚 42 | AVSS — Analog ground |
| 引脚 43 | NC — Not connected (per datasheet) |
| 引脚 44 | NC — Not connected (per datasheet) |
典型应用
PIC16C65A-04E/PQ 适用于 6 应用s: Industrial Control and Automation, Automotive Body Electronics, HVAC and Appliance Controllers, Motor Control Front-Ends, Smart Sensor Hubs, Legacy Embedded System Maintenance.
Industrial Control and Automation
The PIC16C65A-04E/PQ fits industrial control applications thanks to its 33 digital I/O, three serial interfaces (USART, SSP for I2C/SPI), and Extended temperature rating (-40C to +125C) that handles under-cabinet and factory-floor thermal swings. At 4 MHz the MCU delivers 1 MIPS, enough for PLC-style ladder logic replacement, simple PID loops on the 8-bit ADC channels, and HMI keypad scanning. Brown-out Reset and the Watchdog Timer with on-chip RC oscillator keep the controller running unattended for years. Designers porting legacy code retain the PIC16C6X instruction set and the 44-MQFP footprint, while still using the same opto-isolated 24 V input modules typical of industrial PLC backplanes.
推荐
Automotive Body Electronics
The PIC16C65A-04E/PQ's Extended temperature grade (-40C to +125C), 33 I/O, and PWM-capable CCP module suit automotive body modules such as seat controllers, mirror adjusters, and lighting drivers. Its USART links to body-domain LIN/CAN transceivers via external bus controllers, while the 8-bit ADC reads thermistor and potentiometer wiper inputs. At 4 MHz the core easily handles button-debounce, soft-start PWM ramps, and lamp-out diagnostics. Designers must note that this part is not AEC-Q100 qualified; production automotive ECUs typically pair it with an external watchdog supervisor and qualified CAN/LIN transceivers for functional safety.
推荐
HVAC and Appliance Controllers
HVAC thermostats, refrigerator control boards, and washing-machine user-interface modules commonly rely on the PIC16C65A-04E/PQ's combination of USART for UI board communication, ADC channels for NTC temperature sensors, and PWM for fan or compressor drive stages. The 1 µA typical sleep current at 3 V/32 kHz is well within battery-backed thermostat budgets, and the Brown-out Reset preserves state across brown-outs on poorly regulated appliance supplies. With 192 bytes of RAM, the firmware comfortably holds setpoint history, run-time counters, and EEPROM-emulation data structures. Replacement legacy designs can drop the PIC16F877A in the same 44-MQFP footprint for flash re-programmability during field service.
推荐
Motor Control Front-Ends
The PIC16C65A-04E/PQ serves as a motor-control front-end where the CCP module generates a single PWM channel for low-side or H-bridge gate drivers, while the ADC samples back-EMF or shunt current for closed-loop control. With 33 I/O, designers can allocate pins for Hall-sensor inputs, fault flags, and brake/coast logic, all within a single chip. At 4 MHz the instruction throughput is adequate for trapezoidal commutation on BLDC fans and small pumps. For higher-performance FOC or sinusoidal drives, designers should evaluate the PIC18F or dsPIC30F families, which offer dedicated PWM and quadrature encoder peripherals.
推荐
Smart Sensor Hubs
The PIC16C65A-04E/PQ can act as a smart-sensor hub aggregating I2C sensors over the SSP port and forwarding readings over the USART to a host controller. Its 8-channel 8-bit ADC reads low-bandwidth analog sensors directly, while the digital I/O lines handle interrupts from digital sensors. With 192 bytes of RAM, the firmware can buffer a small telemetry packet before transmitting. The Extended temperature grade is valuable for outdoor sensor installations (weather stations, agricultural monitors). For ultra-low-power applications requiring sleep currents under 1 µA, however, designers should migrate to PIC16F or PIC18 nano-power variants with deeper sleep modes.
推荐
Legacy Embedded System Maintenance
When maintaining or repairing a long-deployed fleet of products built on the PIC16C65A-04E/PQ, designers often need a drop-in source to keep legacy code running. The PIC16C65A-04/PQ and PIC16C65A-04I/PQ variants are electrical drop-in replacements within the same 44-MQFP footprint, differing only in the temperature grade. For new features, the PIC16F877A-04I/PQ is the preferred flash-based migration path, sharing the same 44-MQFP pinout while adding in-circuit re-programmability. Engineers must also confirm that the legacy firmware does not rely on PIC16C65A-specific SSP behavior, since some errata were corrected in later silicon revisions such as the PIC16C65B.
推荐
推荐产品汇总
工程参考数据： PIC16C65A-04E/PQ ——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 | PIC16C65A-04/PQ | PIC16C65B-04E/PQ | PIC16C65A-04I/PQ | PIC16C66-04E/PQ | PIC16C67-04E/PQ | PIC16F877A-04I/PQ |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-MQFP (PQ) 10x10 mm | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same | 44-MQFP (PQ) - same |
| Core Architecture | 8-bit PIC16C RISC | 8-bit PIC16C RISC | 8-bit PIC16C RISC | 8-bit PIC16C RISC | 8-bit PIC16C RISC | 8-bit PIC16C RISC | 8-bit PIC16F RISC |
| Program Memory | 7 KB OTP (4K x 14) | 7 KB OTP | 7 KB OTP | 7 KB OTP | 8 KB OTP (~14% larger) | 8 KB OTP (~14% larger) | 8 KB Flash (re-programmable) |
| Data RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 336 bytes | 368 bytes | 368 bytes |
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz (also 10/20 MHz variants) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | -40C to +125C (Extended) | 0C to +70C (Commercial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +85C (Industrial) |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash (re-programmable) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Active |
关键差异点
- Extended temperature grade (-40C to +125C) on a 4 MHz PIC16C core （对比 PIC16C65A-04I/PQ)
- OTP EPROM workflow is fully hardware-compatible with PIC16C66/PIC16C67 （对比 PIC16F877A-04I/PQ)
- Active production legacy silicon with Extended temperature grade （对比 PIC16C66-04E/PQ)
设计说明
The PIC16C65A-04E/PQ's OTP program memory can be written only once per device. Engineers prototyping firmware must either use a windowed (CERQUAD) package for UV erasure or plan to discard several OTP samples per firmware revision. For volume production, this also means any firmware bug discovered post-programming renders the device scrap - budget for a flash-based PIC16F877A pilot run in parallel to mitigate ramp-up risk. Estimated cost penalty per scrapped OTP unit at 2026-09-17 distributor pricing: roughly $5-$10 per 1k-piece unit, not including programming time.
The PIC16C65A-04E/PQ draws 15 µA typical at 5 V/4 MHz and 1 µA typical at 3 V/32 kHz in sleep mode. For battery-backed or energy-harvesting designs, route the MCLR pin through a proper Power-on Reset / Brown-out Reset supervisor and decouple VDD with at least a 100 nF ceramic capacitor as close as possible to the IC pin, plus a bulk 10 µF tantalum or electrolytic on the same net. Estimated: at 5 V/4 MHz/33 active I/O, average current budget should reserve at least 20 mA headroom above the 15 µA core figure to cover peripheral switching and digital I/O transitions.
Lay out the 44-MQFP footprint with at least 6 mil trace-and-space and route the analog AVdd/AVss pins with a star-ground connection back to the VDD decoupling capacitor. Place the 4 MHz crystal (or ceramic resonator) within 5 mm of OSC1/OSC2, with the load capacitors referenced to the same ground plane. Keep the parallel-port PORTD/PORTE traces short or shielded with ground, since these lines can inject noise into the analog ADC inputs if routed near AVdd. Estimated: for a 4-layer FR4 board, a 44-MQFP pad pattern with 0.8 mm pitch consumes roughly 12 mm x 12 mm board area including keep-out.
合规信息
Compliance flags not present in the Verified Web Data. PIC16C65A-04E/PQ is not AEC-Q100 qualified; for automotive ECUs pair with an external watchdog/supervisor. RoHS/REACH status should be confirmed with Microchip or distributor before design-in.
