PIC16C64AT-04I/PQ - 8-Bit 4MHz OTP MCU, 44-MQFP | Microchip
Référence : PIC16C64AT-04I/PQ ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $10.79 | $10,79 |
| 10 | $10.2 | $102,00 |
| 100 | $9.1 | $910,00 |
| 500 | $8.25 | $4 125,00 |
| 1 000 | $7.55 | $7 550,00 |
PIC16C64AT-04I/PQ Présentation
Background: 8-bit microcontrollers (MCUs) are single-chip computers integrating a CPU core, program memory, data RAM, peripherals, and I/O on a single die. The PIC16C family uses Microchip's enhanced Harvard RISC architecture, which separates program and data buses to allow simultaneous fetch and execute, yielding deterministic instruction timing. The PIC16C64A belongs to the mid-range PIC family (14-bit instruction word), and OTP variants are programmed once at production and cannot be erased, which keeps unit cost low for high-volume embedded products.
Key features include a RISC instruction set with only 35 single-word instructions, 14-bit wide program memory, 8-bit data path, programmable code protection, a Watchdog Timer with its own on-chip RC oscillator, power-saving SLEEP mode, and three hardware timers (Timer0, Timer1, Timer2). It also integrates a Universal Synchronous Asynchronous Receiver Transmitter (USART) for serial communications. Industrial-grade -40C to +85C operating temperature (I-grade) makes the part suitable for harsh environments.
The architecture uses a 14-bit program counter that can address up to 8K x 14 words of program memory. The ALU is 8-bit wide and operates on a working register (W) and the data memory. Brown-out Reset, Power-on Reset, and a programmable code-protect bit are also integrated.
Typical applications include industrial control (sensor interfacing, motor control, lighting controllers), automotive body electronics (climate controls, instrument clusters), consumer appliances (washing machines, microwave ovens), and general-purpose embedded systems (keypad scanners, smart sensors, security panels) where a low-cost, low-pin-count controller suffices.
When designing with the PIC16C64AT-04I/PQ, plan for an OTP programming step during manufacturing (no field re-programmability). Ensure a stable 5V supply, a decoupling capacitor close to VDD/VSS, and observe the in-circuit serial programming (ICSP) pinout if field upgrade or factory programming is needed. For new designs consider PIC16F variants for Flash reprogrammability.
This page synthesizes real distributor pricing, drop-in alternative cross-references and practical design notes that the manufacturer datasheet does not consolidate.
Alternatives de remplacement direct pour PIC16C64AT-04I/PQ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC16C64AT-04I/PQ (même facteur de forme et même empreinte) — différant par Operating Temperature Range, Package, Timers, Program Memory Type, Core Architecture.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16C64A-04I/PQ
✅ Remplacement direct✓ En stock
$6.4 / unité
Voir la fiche technique →PIC16C64AT-04E/PQ
✅ Remplacement direct✓ En stock
$6.8 / unité
Voir la fiche technique →PIC16C64AT-04/PT
✅ Remplacement direct✓ En stock
$11.4 / unité
Voir la fiche technique →PIC16C64A-04E/PQ
✅ Remplacement direct✓ En stock
$5.4 / unité
Voir la fiche technique →PIC16C64A-04/PQ
✅ Remplacement direct✓ En stock
$4.3 / unité
Voir la fiche technique →PIC16C64AT-04E/L
✅ Remplacement direct✓ En stock
$6.1 / unité
Voir la fiche technique →PIC16C64AT-04I/PQ Valeurs maximales et caractéristiques électriques
| Core Architecture | PIC16 (8-bit Harvard RISC) |
| Instruction Set | 35 single-word instructions, 14-bit wide |
| Fréquence d'horloge maximale | 4 MHz |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| I/O Pins | 33 |
| Supply Voltage (VDD) | 5 V nominal |
| Plage de température de fonctionnement | -40C to +85C (Industrial) |
| Boîtier | 44-MQFP (10x10 mm) |
| Package Mounting | Surface Mount |
| Timers | Timer0, Timer1, Timer2 |
| Communication | USART/SCI |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| Power-Saving Mode | SLEEP mode |
| Programmable Code Protection | Yes |
Configuration des broches de PIC16C64AT-04I/PQ
| Broche 1 | RE2 — I/O port E bit 2 |
| Broche 2 | RE1 — I/O port E bit 1 |
| Broche 3 | RE0 — I/O port E bit 0 |
| Broche 4 | OSC1 — Crystal/resonator input or external clock in |
| Broche 5 | OSC2 — Crystal/resonator output |
| Broche 6 | RC0 — I/O port C bit 0 |
| Broche 7 | RC1 — I/O port C bit 1 |
| Broche 8 | RC2 — I/O port C bit 2 |
| Broche 9 | RC3 — I/O port C bit 3 |
| Broche 10 | RD0 — I/O port D bit 0 |
| Broche 11 | RD1 — I/O port D bit 1 |
| Broche 12 | RD2 — I/O port D bit 2 |
| Broche 13 | RD3 — I/O port D bit 3 |
| Broche 14 | RD4 — I/O port D bit 4 |
| Broche 15 | RD5 — I/O port D bit 5 |
| Broche 16 | RD6 — I/O port D bit 6 |
| Broche 17 | RD7 — I/O port D bit 7 |
| Broche 18 | VSS — Ground reference |
| Broche 19 | VSS — Ground reference |
| Broche 20 | VDD — +5V supply |
| Broche 21 | VDD — +5V supply |
| Broche 22 | RB0 — I/O port B bit 0 (INT) |
| Broche 23 | RB1 — I/O port B bit 1 |
| Broche 24 | RB2 — I/O port B bit 2 |
| Broche 25 | RB3 — I/O port B bit 3 |
| Broche 26 | RB4 — I/O port B bit 4 |
| Broche 27 | RB5 — I/O port B bit 5 |
| Broche 28 | RB6 — I/O port B bit 6 (PGC) |
| Broche 29 | RB7 — I/O port B bit 7 (PGD) |
| Broche 30 | RC4 — I/O port C bit 4 |
| Broche 31 | RC5 — I/O port C bit 5 |
| Broche 32 | RC6 — I/O port C bit 6 (TX) |
| Broche 33 | RC7 — I/O port C bit 7 (RX) |
| Broche 34 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| Broche 35 | NC — Not connected (per datasheet) |
| Broche 36 | NC — Not connected (per datasheet) |
| Broche 37 | NC — Not connected (per datasheet) |
| Broche 38 | NC — Not connected (per datasheet) |
| Broche 39 | NC — Not connected (per datasheet) |
| Broche 40 | NC — Not connected (per datasheet) |
| Broche 41 | NC — Not connected (per datasheet) |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | NC — Not connected (per datasheet) |
Applications typiques
PIC16C64AT-04I/PQ convient pour 6 applications: Industrial Sensor Interfacing and Control, Automotive Body Electronics, Home Appliance Control Boards, Security and Access Control Panels, Hobbyist and Educational Embedded Projects, Legacy Industrial Replacement and Aftermarket Service.
Industrial Sensor Interfacing and Control
The PIC16C64AT-04I/PQ is well suited to industrial sensor interfacing and control applications where moderate processing power, deterministic timing and a generous complement of 33 I/O pins are required. Its 3.5KB OTP memory comfortably holds typical sensor-acquisition and actuation algorithms for temperature, pressure, flow or proximity sensor front ends. The four 8-bit ports (B/C/D) and three extra lines on port E let the MCU scan multiple analog sensors via external ADCs or digital sensors via SPI/I2C bit-banging, while the integrated USART provides RS-232/RS-485 connectivity to a SCADA or PLC backplane. Industrial-grade -40C to +85C operation and the Watchdog Timer with on-chip RC oscillator ensure reliable recovery from EMI-induced lockups common on factory floors.
Recommandé
Automotive Body Electronics
The PIC16C64AT-04I/PQ serves well in automotive body electronics applications such as instrument clusters, climate controls, seat-position controllers and lighting modules, where its 8-bit PIC16 RISC core delivers predictable interrupt latency and a small code footprint. The 33 I/O pins can drive multiplexed LED or LCD displays, scan keypads and read multiple switches simultaneously, while the three hardware timers (TMR0/TMR1/TMR2) handle PWM for dimming and motor speed control. The industrial -40C to +85C temperature range handles most cabin environments, and the integrated SLEEP mode reduces quiescent current during vehicle-off states. Note that under-hood or near-engine applications require the -40C to +125C extended-temperature PIC16C64AT-04E/PQ variant instead.
Recommandé
Home Appliance Control Boards
In home appliance control boards (washing machines, microwave ovens, dishwashers, refrigerators), the PIC16C64AT-04I/PQ provides a low-cost, OTP-programmed solution with sufficient memory and I/O for relay drivers, sensor inputs and user-interface handling. Its 3.5KB program memory holds a typical appliance state machine, the 33 I/O lines drive segment displays, LEDs, keypads, buzzer, motor relays and triac interfaces, and the USART enables factory test and field diagnostics. OTP programming keeps unit cost low for high-volume appliances, and the industrial -40C to +85C range handles the thermal environment behind a control panel.
Recommandé
Security and Access Control Panels
The PIC16C64AT-04I/PQ is well matched to security and access control panels (alarm keypads, RFID readers, door controllers) where deterministic scan timing, code protection and modest memory are essential. Programmable code protection prevents cloning of the access-control firmware. The 33 I/O pins support matrix keypads, LEDs, buzzers, magnetic-door sensors and relay outputs for electric strikes, while the integrated USART connects to a central alarm panel or RS-485 multi-drop bus. The Watchdog Timer with on-chip RC oscillator guarantees recovery from firmware lockups caused by EMI from nearby wiring.
Recommandé
Hobbyist and Educational Embedded Projects
The PIC16C64AT-04I/PQ is widely used in hobbyist and educational embedded projects because the PIC16 instruction set is simple to learn (only 35 single-word, 14-bit instructions) and freely available MPLAB X IDE and XC8 compiler tools let students program and debug it on a breadboard. Its 33 I/O pins and USART make it large enough to drive educational peripherals such as seven-segment LED arrays, character LCDs, keypads and stepper motors, yet small enough to fit in a single-lab-session demonstration. The low unit cost (~$10 at qty 1) and broad availability through educational suppliers keep it a popular teaching platform despite its obsolete status.
Recommandé
Legacy Industrial Replacement and Aftermarket Service
The PIC16C64AT-04I/PQ is in continuous demand for legacy industrial replacement and aftermarket service applications, where existing PIC16C64A designs in PLCs, motor drives, instrumentation and process controllers must be kept operational for 10 to 20 years. Because Microchip has classified the part obsolete, only authorized and aftermarket distributors carry inventory, but the PIC16C64A family shares the same instruction set, memory map and pinout, so qualified replacements (PIC16C64A-04I/PQ, PIC16C64AT-04E/PQ) are drop-in compatible. This page helps engineers and procurement teams source genuine, traceable parts for service contracts while planning a long-term migration path to PIC16F or PIC18F family devices.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16C64AT-04I/PQ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC16C64A-04I/PQ | PIC16C64AT-04E/PQ | PIC16C64AT-04/PT | PIC16C64A-04E/PQ | PIC16C64A-04/PQ | PIC16C64AT-04E/L |
|---|---|---|---|---|---|---|---|
| Package | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-TQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) | 44-MQFP (10x10 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 3.5 KB OTP (2K x 14) | 3.5 KB OTP (2K x 14) | 3.5 KB OTP (2K x 14) | 3.5 KB OTP (2K x 14) | 3.5 KB OTP (2K x 14) | 3.5 KB OTP (2K x 14) | 3.5 KB OTP (2K x 14) |
| RAM | 128 B | 128 B | 128 B | 128 B | 128 B | 128 B | 128 B |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | 0C to +70C (Commercial) | -40C to +125C (Extended) | 0C to +70C (Commercial) | -40C to +125C (Extended) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Principaux différenciateurs
- Direct industrial-temperature drop-in replacement (vs PIC16C64A-04I/PQ)
- Higher temperature grade option (extended) (vs PIC16C64AT-04E/PQ)
- Legacy industrial qualification and code-protection (vs Generic 8-bit Flash MCU)
Notes de conception
Place a 100 nF ceramic decoupling capacitor as close as physically possible to each VDD/VSS pin pair (44-MQFP pins 18-19 for VSS and pins 20-21 for VDD). Add a bulk 10 uF tantalum or aluminum-polymer capacitor on the supply rail within 25 mm of the package. The PIC16C64AT-04I/PQ draws approximately 5 mA active and 1 uA in SLEEP at 5 V, 4 MHz, so decoupling requirements are modest but mandatory for EMI-sensitive industrial environments.
Because PIC16C64AT-04I/PQ is OTP (One-Time Programmable), there is NO field re-programmability once the part has been programmed. Plan the programming step carefully during manufacturing, verify the entire code base in-circuit emulation (PIC16C64A ICE) before committing to OTP, and budget a small yield-loss percentage. For development, always prototype with a windowed UV-erasable PIC16C64A or a Flash PIC16F887-I/P equivalent.
Route the 4 MHz crystal or ceramic resonator traces to OSC1/OSC2 (pins 4/5) as short as possible (< 5 mm) and shield them with a ground pour. Keep high-current switching traces (relay drivers, triac control) at least 5 mm away from the oscillator network to avoid injecting noise into the system clock. The MCLR/VPP pin (pin 34) requires a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for in-circuit serial programming (ICSP) compatibility.
At 5 V and 4 MHz with all 33 I/O pins unloaded, the PIC16C64AT-04I/PQ dissipates approximately 25 mW. In the 44-MQFP package with a typical theta_JA of 60 C/W, this results in a 1.5 C temperature rise above ambient - well within the -40C to +85C industrial rating. Heatsinking is not required, but adequate PCB copper (at least 100 mm^2 of GND pour) is recommended to keep junction temperature low under heavy I/O switching loads.
Informations de conformité
RoHS status not explicitly stated in the Verified Web Data; this part predates broad RoHS adoption and may need verification with the supplier. AEC-Q100 qualification not applicable for non-automotive-grade MCU.
