PIC16C65A-04E/P - 4MHz 8-Bit OTP MCU, 7KB EPROM, 40-PDIP | Microchip
N.º de pieza: PIC16C65A-04E/P ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $7.5 | $7,50 |
| 10 | $6.8 | $68,00 |
| 100 | $6.1 | $610,00 |
| 500 | $5.4 | $2.700,00 |
| 1.000 | $4.85 | $4.850,00 |
PIC16C65A-04E/P Descripción general
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripherals on one silicon die. Within the wider taxonomy, this part sits in the microcontroller -> microprocessor -> semiconductor -> integrated circuit hierarchy. PIC MCUs implement a Harvard RISC architecture with 35 single-word instructions and a 200 ns instruction cycle at 4 MHz, which is why PIC parts are commonly classified as low-cost, easy-to-program 8-bit controllers.
Key features of the PIC16C65A-04E/P include an internal 8-bit timer/counter, a watchdog timer, an analog comparator, and a synchronous/asynchronous serial port (USART/SCI). Its fully static design means the clock can be stopped without losing register state, enabling low-power sleep/idle modes. The Extended temperature suffix "E" qualifies the part for harsh industrial environments that exceed the commercial 0C to +70C range.
Architecturally, the PIC16C65A-04E/P uses a 14-bit instruction word with an 8-bit data path, separating program and data buses so an instruction can be fetched while the previous one is executing. OTP (one-time programmable) EPROM program memory allows fast prototyping but only supports a single programming cycle - this differs from flash-based PIC16F successors which offer in-circuit reprogramming.
Typical applications include industrial control logic, motor drivers, sensor interfacing, and legacy embedded systems that still require a 40-pin PDIP footprint for through-hole assembly. Designers often choose this part when modern flash MCUs are unavailable or when maintaining drop-in compatibility with older 40-pin PIC16 designs is mandatory.
When designing with this MCU, plan the decoupling network carefully: place a 0.1 uF ceramic bypass close to VDD and add bulk capacitance for analog references. Programming the OTP device requires a compatible device programmer; once blown, the program memory cannot be erased, so verify firmware in a flash equivalent first.
This page synthesizes distributor availability, same-family drop-in PIC alternatives, and design notes not collated in the original Microchip datasheet.
Alternativas directas para PIC16C65A-04E/P — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC16C65A-04E/P (mismo factor de forma y huella) — difiere en Core Architecture, Package, Timers, Program Memory Size, ADC.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC16C65A-04/P
✅ Sustitución directa✓ En stock
$8.1 / unidad
Ver hoja de datos →PIC16C65A-04E/L
✅ Sustitución directa✓ En stock
$11.2 / unidad
Ver hoja de datos →PIC16C65B-04E/P
✅ Sustitución directa✓ En stock
$5.45 / unidad
Ver hoja de datos →PIC16F877A-04/P
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
PIC16C65A-20/P
✅ Sustitución directa✓ En stock
$3.85 / unidad
Ver hoja de datos →PIC16C65A-04E/P Valores máximos y características eléctricas
| Product Family | PIC16C6x |
| Core | 8-bit PIC RISC |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 192 bytes |
| EEPROM Size | 0 bytes (none on-chip) |
| Maximum CPU Speed | 4 MHz |
| Instruction Cycle | 200 ns at 4 MHz |
| Number of I/O Pins | 33 |
| Supply Voltage Range | 2.5 V to 6.0 V |
| Rango de temperatura de funcionamiento | -40C to +125C (Extended, "E") |
| Encapsulado / Carcasa | 40-pin PDIP (0.600 inch / 15.24 mm) |
| Tipo de montaje | Through-Hole |
| Oscillator Type | External (crystal/RC) |
| Peripherals | USART/SCI, Timer, Watchdog Timer, Analog Comparator |
Configuración de pines de PIC16C65A-04E/P
| Pin 1 | MCLR/VPP — Master Clear (Reset) input / programming voltage |
| Pin 2 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Pin 4 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Pin 5 | RA3/AN3/VREF — Port A bit 3 / analog input 3 / VREF |
| Pin 6 | RA4/T0CKI — Port A bit 4 / Timer 0 clock input |
| Pin 7 | RA5/AN4/SS — Port A bit 5 / analog input 4 / SPI slave select |
| Pin 8 | RE0/RD/AN5 — Port E bit 0 / parallel port read / analog input 5 |
| Pin 9 | RE1/WR/AN6 — Port E bit 1 / parallel port write / analog input 6 |
| Pin 10 | RE2/CS/AN7 — Port E bit 2 / parallel port chip select / analog input 7 |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 14 | OSC2/CLKOUT — Oscillator output / clock output |
| Pin 15 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer 1 oscillator output / T1 clock input |
| Pin 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer 1 oscillator input / CCP2 |
| Pin 17 | RC2/CCP1 — Port C bit 2 / Capture Compare PWM 1 |
| Pin 18 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Pin 19 | RD0/PSP0 — Port D bit 0 / parallel slave port bit 0 |
| Pin 20 | RD1/PSP1 — Port D bit 1 / parallel slave port bit 1 |
| Pin 21 | RD2/PSP2 — Port D bit 2 / parallel slave port bit 2 |
| Pin 22 | RD3/PSP3 — Port D bit 3 / parallel slave port bit 3 |
| Pin 23 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Pin 24 | RC5/SDO — Port C bit 5 / SPI data out |
| Pin 25 | RC6/TX/CK — Port C bit 6 / USART TX / USART clock |
| Pin 26 | RC7/RX/DT — Port C bit 7 / USART RX / USART data |
| Pin 27 | RD4/PSP4 — Port D bit 4 / parallel slave port bit 4 |
| Pin 28 | RD5/PSP5 — Port D bit 5 / parallel slave port bit 5 |
| Pin 29 | RD6/PSP6 — Port D bit 6 / parallel slave port bit 6 |
| Pin 30 | RD7/PSP7 — Port D bit 7 / parallel slave port bit 7 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RB0/INT — Port B bit 0 / external interrupt |
| Pin 34 | RB1 — Port B bit 1 |
| Pin 35 | RB2 — Port B bit 2 |
| Pin 36 | RB3/PGM — Port B bit 3 / low-voltage programming |
| Pin 37 | RB4 — Port B bit 4 |
| Pin 38 | RB5 — Port B bit 5 |
| Pin 39 | RB6/PGC — Port B bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — Port B bit 7 / ICSP data |
Aplicaciones típicas
PIC16C65A-04E/P es adecuado para 6 aplicacións: Industrial Control Logic, Motor Driver Control Board, Sensor Interface and Signal Conditioning, Legacy Embedded System Maintenance, HMI Keypad and Display Interface, Educational and Prototyping Platform.
Industrial Control Logic
The PIC16C65A-04E/P fits industrial control logic with its 33 GPIO pins, 4 MHz CPU, and Extended temperature grade (-40C to +125C). Its PIC RISC core executes 35 single-word instructions per 200 ns cycle, allowing deterministic sequencing of relays, solenoids, and contactor drivers. With 7 KB OTP program memory, designers can implement ladder-logic-equivalent state machines for conveyor sorting, packaging lines, and process interlocks. The fully static design supports low-power sleep between control cycles, which is critical for 24 V industrial bus systems.
Recomendado
Motor Driver Control Board
The PIC16C65A-04E/P suits small brushed DC and stepper motor control boards thanks to its PWM-capable timer, 33 I/O pins for H-bridge gate drive, and analog comparator for back-EMF sensing. At 4 MHz with a 200 ns instruction cycle, the part generates PWM frequencies up to approximately 20 kHz with 8-bit duty resolution, enough for low-noise commutation of small hobby-grade and appliance motors. The Extended temperature grade is essential for motor housings that can exceed 70C under continuous load.
Recomendado
Sensor Interface and Signal Conditioning
The PIC16C65A-04E/P serves sensor interface nodes by combining its 33 digital I/O pins, USART/SCI serial port, and analog comparator for threshold detection. With 7 KB of OTP memory, firmware can implement sensor linearization, debounce, and SCADA-protocol framing. Operating from 2.5 V to 6.0 V, the part supports both 3.3 V and 5 V sensor rails, while its 15 uA typical quiescent draw at 5 V / 4 MHz enables battery-powered field transmitters. Extended temperature tolerance is vital for outdoor and factory-floor installations.
Recomendado
Legacy Embedded System Maintenance
The PIC16C65A-04E/P is used to maintain legacy embedded systems where redesign to flash memory is cost-prohibitive. Its 40-pin PDIP footprint matches older designs that are otherwise obsolete, allowing direct PCB-level substitution. With 192 bytes of RAM and 7 KB of OTP, the part reproduces original firmware behavior bit-for-bit, which is essential when a regulatory-certified product cannot be re-validated. The Extended temperature suffix ensures availability of -40C to +125C industrial variants for field-spares inventory.
Recomendado
HMI Keypad and Display Interface
The PIC16C65A-04E/P drives HMI keypads and character-LCD interfaces using its 33 GPIO pins to scan up to a 4x5 matrix and write 4-bit data to HD44780-compatible displays. At 4 MHz, scan rates comfortably exceed 100 Hz with full debounce, eliminating key bounce artifacts. The Extended -40C to +125C operating range suits outdoor kiosks, automotive test equipment, and HVAC control panels. Its 7 KB OTP memory stores lookup tables for menu navigation without external storage.
Recomendado
Educational and Prototyping Platform
The PIC16C65A-04E/P works as an educational 8-bit MCU platform because of its 35-instruction RISC set, 40-pin PDIP through-hole package, and abundant documentation from Microchip. The 7 KB OTP, 192 B RAM, and USART let students build UART-driven projects, timers, and interrupt-driven firmware in assembly or C. Extended temperature operation demonstrates real-world industrial-grade behavior, and the 40-pin PDIP format survives repeated insertion into breadboards and ZIF sockets during lab exercises.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC16C65A-04E/P — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC16C65A-04/P | PIC16C65B-04E/P | PIC16F877A-04/P | PIC16C65A-20/P | PIC16C65A-04E/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin PDIP (0.600 in / 15.24 mm) | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 44-pin PLCC - different mechanical package |
| Program Memory Type | OTP EPROM (7 KB / 4K x 14) | OTP EPROM (7 KB) | OTP EPROM (7 KB) | Flash (14 KB) | OTP EPROM (7 KB) | OTP EPROM (7 KB) |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz |
| Operating Temperature Grade | Extended (-40C to +125C) | Commercial (0C to +70C) | Extended (-40C to +125C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Extended (-40C to +125C) |
| RAM Size | 192 bytes | 192 bytes | 192 bytes | 368 bytes | 192 bytes | 192 bytes |
| Number of I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| ADC | None (analog comparator only) | None | None | 8-channel 10-bit | None | None |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Active | Obsolete | Obsolete |
Diferenciadores clave
- Extended temperature grade (frente a PIC16C65A-04/P)
- Silicon Rev. B fixes Rev. A errata (frente a PIC16C65A-04/P (Rev. A silicon))
- Through-hole 40-pin PDIP assembly (frente a PIC16F877A-I/P (also 40-pin PDIP but flash-based))
- Fully static design with SLEEP mode (frente a PIC16C65A-20/P (20 MHz variant))
Notas de diseño
Estimated: At 5 V supply and 4 MHz oscillator, the PIC16C65A-04E/P draws approximately 15 uA typical quiescent current per the Microchip PIC16C6X datasheet. Place a 0.1 uF ceramic bypass capacitor within 5 mm of pins 11 and 32 (VDD) and a bulk 10 uF tantalum or aluminum cap on the same rail. For battery-powered designs, use the SLEEP instruction and configure the watchdog timer to wake the part periodically; the fully static architecture allows the clock to be halted in software without losing RAM contents.
The PIC16C65A-04E/P uses OTP EPROM, not flash, so once programmed the firmware cannot be electrically erased. Always validate firmware on a flash-based equivalent such as the PIC16F877A-04/P first, then commit to the OTP part only after verification. MCLR (pin 1) must be pulled high through a 10 kohm resistor for normal operation; leaving it floating will cause intermittent resets. The "E" suffix designates the Extended temperature grade - never substitute the commercial PIC16C65A-04/P in Extended-grade applications.
The 40-pin PDIP through-hole footprint allows generous trace routing but requires a clean analog/digital ground split. Per the Microchip PIC16C6X datasheet, the analog comparator reference input (RA3/AN3/VREF) is sensitive to digital switching noise; route VREF traces away from the oscillator and place a small RC filter if comparator stability is critical. Reserve an ICSP header (PGC on RB6, PGD on RB7, MCLR/VPP on pin 1) for factory programming even if in-circuit programming is not planned, since the OTP die cannot be socketed after programming.
The USART/SCI pins (RC6/TX, RC7/RX) share port C with the SPI/I2C peripherals; configure the TRISC register carefully to avoid bus contention. The PIC16C65A-04E/P does not have an internal ADC, so any analog signal must be conditioned through the analog comparator on RA3/RA2 or an external ADC. Maximum source/sink current per I/O is 25 mA per pin and 200 mA per port per Microchip datasheet DS30234D - never drive LEDs without a current-limiting resistor.
Información de cumplimiento
RoHS, REACH, lead-free, and halogen-free status were not present in the verified web data and are flagged [DATA_NEEDED]. The part is industrial Extended-grade, not AEC-Q100 automotive qualified.
