PIC16C65AT-04I/L - 8-Bit OTP MCU 7KB 4MHz PLCC-44 | Microchip
N.º da peça: PIC16C65AT-04I/L ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $9.95 | $9,95 |
| 10 | $9.1 | $91,00 |
| 100 | $8.2 | $820,00 |
| 500 | $7.35 | $3.675,00 |
| 1.000 | $6.6 | $6.600,00 |
PIC16C65AT-04I/L Visão geral
What is an OTP PIC microcontroller? An OTP (One-Time Programmable) microcontroller uses EPROM-based program memory that can be written only once and then retains the code permanently without a backup battery. Within the broader taxonomy it sits as: microcontroller -> embedded MCU -> 8-bit MCU -> PIC16 family -> PIC16C6X sub-family. The PIC16C65A was the original CMOS EPROM member of the PIC16C6X line, providing RISC performance for embedded industrial designs of the 1990s and early 2000s.
Key features highlighted by the verified distributor data include 33 digital I/O lines, an external oscillator interface, an internal 8-bit timer/counter architecture and synchronous/asynchronous serial port (USART/SCI) capability per the PIC16C6X family specification. The PLCC-44 (16.59 x 16.59 mm, J-lead) format gives robust socket compatibility for legacy through-hole industrial and test-fixture designs where DIP-40 or PLCC-44 sockets are already deployed. The /L suffix indicates the J-lead PLCC-44 package form.
From a technical-depth perspective, the PIC16C65A uses a Harvard-architecture RISC core with separate program and data buses, allowing instruction fetch and data access to occur in parallel. The 14-bit instruction word supports direct, indirect, and relative addressing modes, and the architecture provides hardware stack for subroutine nesting. Power-saving modes include the SLEEP state, and a watchdog timer is available to recover from software lockups in unattended equipment.
Typical applications are industrial automation controllers, instrumentation front-ends, motor-control auxiliary logic, embedded sensor hubs, automotive aftermarket modules, and legacy equipment service replacements where a socketed PLCC-44 PIC must be substituted. Many design teams keep PIC16C65A stock on hand to maintain older field installations.
Design consideration: because the device is OTP, code must be fully verified before programming — there is no in-system reprogram path. For new designs the PIC16F877A (Flash-based) is the modern recommended migration, while the PLCC-44 socket footprint keeps PIC16C65AT-04I/L a true drop-in for legacy boards.
This page combines distributor pricing, verified PIC16C65A family specs, drop-in alternatives, and practical design notes not consolidated in any single manufacturer document.
Alternativas drop-in para PIC16C65AT-04I/L — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC16C65AT-04I/L (mesmo formato e footprint) — diferindo em Program Memory Size, Program Memory Type, Core Architecture, Package, Timers.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16C65A-04I/L
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16C65AT-04E/L
✅ Drop-In✓ Em estoque
$5.75 / unidade
Ver ficha técnica →PIC16C65A-04E/L
✅ Drop-In✓ Em estoque
$11.2 / unidade
Ver ficha técnica →PIC16C65A-04/L
✅ Drop-In✓ Em estoque
$9.2 / unidade
Ver ficha técnica →PIC16C65BT-04E/L
✅ Drop-In✓ Em estoque
$7.1 / unidade
Ver ficha técnica →PIC16C65AT-04I/L Classificações máximas e características elétricas
| Core | PIC16 8-bit RISC |
| Series | PIC16C6X (PIC16C65A) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| RAM Size | 192 x 8 bytes |
| CPU Speed | 4 MHz |
| Tensão de alimentação | 5 V |
| Number of I/O | 33 |
| Encapsulamento | 44-pin PLCC (J-Lead), 16.59 x 16.59 mm |
| Oscillator Type | External |
| Operating Temperature Grade | Industrial (-40C to +85C) |
| Packaging | Tape & Reel (TR) |
| Tipo de montagem | Surface Mount |
| Status RoHS | unknown (legacy EPROM part, often non-RoHS) |
| Lead-Free | unknown |
| Instruction Word Width | 14 bits |
| Instruction Set | 35 single-word instructions |
| Data EEPROM | None (OTP program memory only) |
| Number of Terminals | 44 |
| Terminal Form | J-BEND |
| Package Code | QCCJ |
Configuração de pinos do PIC16C65AT-04I/L
| Pino 1 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Pino 2 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Pino 3 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / Negative voltage reference |
| Pino 4 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / Positive voltage reference |
| Pino 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input (open-drain) |
| Pino 6 | RA5/SS/AN4 — PORTA bit 5 / Slave Select for SPI / Analog input 4 |
| Pino 7 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pino 8 | OSC2/CLKOUT — Oscillator crystal output / clock out (Fosc/4) |
| Pino 9 | MCLR — Master Clear reset input (active low) |
| Pino 10 | VSS — Ground reference |
| Pino 11 | VDD — Positive supply (5V nominal) |
| Pino 12 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pino 13 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / Capture/Compare/PWM 2 |
| Pino 14 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Pino 15 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pino 16 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pino 17 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pino 18 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Pino 19 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Pino 20 | VSS — Ground reference |
| Pino 21 | VDD — Positive supply (5V nominal) |
| Pino 22 | RB0/INT — PORTB bit 0 / External interrupt input |
| Pino 23 | RB1 — PORTB bit 1 |
| Pino 24 | RB2 — PORTB bit 2 |
| Pino 25 | RB3 — PORTB bit 3 |
| Pino 26 | RB4 — PORTB bit 4 |
| Pino 27 | RB5 — PORTB bit 5 |
| Pino 28 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pino 29 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pino 30 | VSS — Ground reference |
| Pino 31 | VDD — Positive supply (5V nominal) |
| Pino 32 | RD0 — PORTD bit 0 |
| Pino 33 | RD1 — PORTD bit 1 |
| Pino 34 | RD2 — PORTD bit 2 |
| Pino 35 | RD3 — PORTD bit 3 |
| Pino 36 | RD4 — PORTD bit 4 |
| Pino 37 | RD5 — PORTD bit 5 |
| Pino 38 | RD6 — PORTD bit 6 |
| Pino 39 | RD7 — PORTD bit 7 |
| Pino 40 | VSS — Ground reference |
| Pino 41 | VDD — Positive supply (5V nominal) |
| Pino 42 | RE0/RD — PORTE bit 0 / Read control for parallel slave port |
| Pino 43 | RE1/WR — PORTE bit 1 / Write control for parallel slave port |
| Pino 44 | RE2/CS — PORTE bit 2 / Chip select for parallel slave port |
Aplicações típicas
PIC16C65AT-04I/L é adequado para 7 aplicaçãos: Industrial Automation Controllers, Legacy Test & Measurement Instrumentation, Automotive Aftermarket Modules, Embedded Sensor Hubs, Motor Control Auxiliary Logic, Service Replacement Stock for Obsolete Designs, Educational and Training Platforms.
Industrial Automation Controllers
The PIC16C65AT-04I/L's 7 KB OTP program memory and 33 digital I/O lines suit industrial PLC-style controllers where deterministic RISC execution and socketed PLCC-44 maintenance are valued. Its -40C to +85C industrial temperature grade ensures reliable operation in factory-floor enclosures. The 4 MHz clock drives 35 single-word instructions in a single cycle, providing predictable loop timing for relay, solenoid, and sensor I/O control. Engineers use it to manage conveyor logic, machine-tool interlocks, and process-control sub-systems where long-term firmware stability outweighs the need for in-field reprogramming.
Recomendado
Legacy Test & Measurement Instrumentation
Test equipment manufacturers built thousands of instruments around the PIC16C65A OTP microcontroller in the late 1990s, and many of those instruments remain in service today. The PIC16C65AT-04I/L drops directly into the original PLCC-44 socket, restoring functionality without PCB redesign. Its 192 bytes of RAM and 7 KB code space support calibration routines, range-switching logic, and front-panel button-matrix scanning. Service technicians keep this part on hand because the OTP memory preserves calibration constants and avoids accidental firmware tampering during repair.
Recomendado
Automotive Aftermarket Modules
Automotive aftermarket products (alarm systems, engine tuners, gauge drivers, and lighting controllers) frequently used the PIC16C65AT-04I/L for its robust I/O count and industrial temperature grade. The 33 I/O pins interface with switches, relays, LEDs, and CAN/LIN transceivers in older vehicles. While not AEC-Q100 qualified (it predates that standard for this part), the -40C to +85C range covers under-dash and engine-bay conditions with adequate thermal margin. The OTP memory prevents inadvertent code modification in harsh environments.
Recomendado
Embedded Sensor Hubs
The PIC16C65AT-04I/L is well-matched to sensor-hub nodes aggregating thermocouple, strain-gauge, or 4-20 mA inputs in industrial networks. Its USART/SCI peripheral enables RS-232 or RS-485 networking back to a master controller, while 33 I/O lines drive multiplexer select lines and signal-conditioning switches. The 7 KB code space accommodates linearization tables for thermocouples and RTDs. Designers appreciate the deterministic interrupt response and the absence of operating-system overhead in such embedded sensor nodes.
Recomendado
Motor Control Auxiliary Logic
Stepper, BLDC, and DC-motor controllers use the PIC16C65AT-04I/L as auxiliary logic for direction, enable, fault detection, and communication, while a dedicated motor-driver IC handles the power stage. The PIC's 4 MHz CPU and single-cycle instruction execution deliver tight timing for quadrature decoding and PWM generation in supervisory loops. The OTP memory locks down safety-related firmware so it cannot be tampered with. Industrial temperature operation ensures reliability in motor enclosures.
Recomendado
Service Replacement Stock for Obsolete Designs
Many OEMs and contract manufacturers maintain safety stock of the PIC16C65AT-04I/L specifically to support field-installed equipment that must remain operational for 15-20 year service lifetimes. The OTP nature guarantees firmware integrity over decades, and the PLCC-44 socket allows quick field swap without desoldering. Brokers and franchised distributors still carry inventory of this part, and the part is widely listed on Octopart, DigiKey, and Mouser legacy catalogues. For new designs, engineers should migrate to PIC16F877A-I/L, but for service stock this is the canonical part.
Recomendado
Educational and Training Platforms
Universities and technical colleges continue to use the PIC16C65AT-04I/L in embedded-systems curricula because the PLCC-44 socket allows students to repeatedly insert and remove the part during lab exercises without PCB wear. The 7 KB code space, 35-instruction RISC core, and 33 I/O pins offer a tractable platform for teaching assembly language, timer/counter programming, and interrupt-driven design. The OTP memory teaches students the discipline of single-shot programming and firmware validation before commit.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16C65AT-04I/L — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16C65A-04I/L | PIC16C65AT-04E/L | PIC16C65A-04E/L | PIC16C65A-04/L | PIC16C65BT-04E/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Program Memory | 7 KB OTP (4K x 14) | 7 KB OTP (4K x 14) | 7 KB OTP (4K x 14) | 7 KB OTP (4K x 14) | 7 KB OTP (4K x 14) | 7 KB OTP (4K x 14) |
| RAM | 192 x 8 bytes | 192 x 8 bytes | 192 x 8 bytes | 192 x 8 bytes | 192 x 8 bytes | 192 x 8 bytes |
| CPU Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Extended -40C to +125C | Commercial 0C to +70C | Extended -40C to +125C |
| Number of I/O | 33 | 33 | 33 | 33 | 33 | 33 |
| Silicon Revision | PIC16C65A (rev A) | PIC16C65A (rev A) | PIC16C65A (rev A) | PIC16C65A (rev A) | PIC16C65A (rev A) | PIC16C65B (rev B) |
| Packaging Format | Tape & Reel (TR) | Tube | Tape & Reel | Tube | Tube | Tape & Reel |
Principais diferenciais
- Tape & Reel format optimized for high-volume SMT assembly (vs PIC16C65A-04I/L)
- Industrial temperature range covering factory-floor environments (vs PIC16C65A-04/L)
- Wide authorized distributor availability for legacy support (vs PIC16C65BT-04E/L)
Notas de projeto
PIC16C65AT-04I/L operates from a single 5V supply. Place a 100 nF decoupling capacitor within 5 mm of each VDD pin (pins 11, 21, 31, 41) and a bulk 10 uF tantalum or aluminum electrolytic capacitor at the board's power-entry point. The PIC16C6X family datasheet recommends keeping VDD rise time below a few milliseconds to ensure proper Power-On Reset; an RC delay on MCLR or a reset supervisor IC may be needed in slow-ramp supplies. All four VDD pins must be connected, and all four VSS pins must be tied to ground.
Because the PIC16C65AT-04I/L is OTP (one-time programmable), every firmware build burned into a part is permanent. Design teams must validate code in a windowed EPROM emulator (e.g. PIC16C65A with JW package) or in-circuit emulation (ICE 2000) before committing production units. Never use production OTP parts for engineering bring-up. A common pitfall is burning configuration bits (watchdog, oscillator, code protect) incorrectly, which can lock the engineer out of the device — always double-check CONFIG word settings before programming.
Place the 4 MHz crystal or ceramic resonator as close as possible to OSC1 (pin 7) and OSC2 (pin 8), with short traces and a ground pour underneath. Add 22-33 pF loading capacitors (C1, C2) from each oscillator pin to ground. Keep high-frequency digital traces (PORTD bus, USART lines) away from the oscillator loop. The PLCC-44 socket should be a low-profile machined-pin type with gold-plated contacts for reliable insertion cycles in service-replacement scenarios.
Informações de conformidade
PIC16C65AT-04I/L is a legacy OTP EPROM part from the 1990s; explicit RoHS, REACH and halogen-free declarations were not in the verified web data. The PIC16C6X family is generally not AEC-Q100 qualified, so this part is not recommended for safety-critical automotive applications. Verify compliance with the Microchip product page or PCN documents before designing in for new programs.
