PIC16C64A/JW - 8-Bit 20MHz 3.5KB EPROM MCU | Microchip
MPN: PIC16C64A/JW ✗ Cuối đờiPIC16C64A/JW Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/EPROM/Flash), working RAM, and programmable I/O peripherals into one package. EPROM-based MCUs like the PIC16C64A/JW store their program in electrically-programmable read-only memory that can be erased by exposing the die to ultraviolet light through the package window — a workflow favored for iterative development before transitioning to one-time-programmable or mask-ROM production versions. Within the broader semiconductor taxonomy, this part sits in the hierarchy MCU -> 8-bit microcontroller -> embedded controller -> integrated circuit -> semiconductor.
Key features of the PIC16C64A/JW include low-power consumption (15 µA typical at 5 V / 4 MHz; 1 µA typical at 3 V / 32 kHz), a wide 2.5–6.0 V operating range, a synchronous serial port (SSP) supporting SPI and I²C master/slave modes, a USART with on-chip baud-rate generator, three hardware timers (Timer0 8-bit, Timer1 16-bit, Timer2 8-bit with PWM), an 8-bit ADC, and a programmable watchdog timer with on-chip RC oscillator for reliable operation. The Harvard RISC architecture executes most instructions in a single 200 ns cycle at 20 MHz, and the 14-bit wide instruction word delivers higher code density than 8-bit CISC architectures.
Typical applications for the PIC16C64A/JW include industrial control subsystems, automotive body and chassis electronics, appliance controls, security and alarm panels, sensor signal conditioning, and low-power remote monitoring nodes. The windowed CERDIP package allows engineers to erase and reprogram the device during firmware iteration, making it especially useful in engineering development environments, university teaching labs, and small-volume or legacy maintenance scenarios where a Flash-based migration path is not yet validated.
Designers should note that the PIC16C64A is now an older generation; Microchip recommends considering the pin-compatible PIC16C65B or a newer PIC16F family device for new designs. When using the JW (windowed) variant, provide a labeled socket and avoid prolonged exposure of the quartz window to direct sunlight, which can degrade EPROM retention.
Bộ thay thế dễ dàng lắp đặt cho PIC16C64A/JW — 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 PIC16C64A/JW (cùng hình factor và footprint) — khác nhau ở Mounting Type, Package, Instruction Set, Program Memory.
PIC16C65B
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F74-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F877A-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C64A/JW Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit Harvard RISC |
| Instruction Set | 14-bit, 35 instructions |
| Program Memory Type | EPROM (UV-erasable, windowed) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| Data EEPROM | 0 bytes |
| Tần số xung maksimum | 20 MHz |
| Instruction Cycle Time | 200 ns (at 20 MHz) |
| Operating Voltage Range | 2.5 V to 6.0 V |
| I/O Pins | 33 |
| Hộp | 40-pin CERDIP Windowed (0.600 in / 15.24 mm) |
| Kiểu lắp đặt | Through-Hole (THT) |
| Operating Temperature Range (Commercial) | 0 °C to +70 °C |
| Peripherals | USART, SSP (SPI/I²C), 8-bit ADC, 3 Timers, PWM, WDT |
| Low-Power Consumption | 15 µA typical at 5 V / 4 MHz; 1 µA typical at 3 V / 32 kHz |
Cấu hình chân PIC16C64A/JW
| Chân 1 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Chân 2 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Chân 3 | RA2/AN2 — Port A bit 2 / analog input 2 |
| Chân 4 | RA3/AN3/VREF — Port A bit 3 / analog input 3 / voltage reference |
| Chân 5 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Chân 6 | RA5/AN4/SS — Port A bit 5 / analog input 4 / SSP slave select |
| Chân 7 | OSC1/CLKIN — Oscillator crystal input / external clock |
| Chân 8 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Chân 9 | RC0 — Port C bit 0 |
| Chân 10 | RC1 — Port C bit 1 |
| Chân 11 | RC2 — Port C bit 2 |
| Chân 12 | RC3 — Port C bit 3 |
| Chân 13 | RC4 — Port C bit 4 |
| Chân 14 | RC5 — Port C bit 5 |
| Chân 15 | RC6 — Port C bit 6 |
| Chân 16 | RC7 — Port C bit 7 |
| Chân 17 | RB0/INT — Port B bit 0 / external interrupt |
| Chân 18 | RB1 — Port B bit 1 |
| Chân 19 | RB2 — Port B bit 2 |
| Chân 20 | RB3 — Port B bit 3 |
| Chân 21 | RB4 — Port B bit 4 |
| Chân 22 | RB5 — Port B bit 5 |
| Chân 23 | RB6/PGC — Port B bit 6 / ICSP clock |
| Chân 24 | RB7/PGD — Port B bit 7 / ICSP data |
| Chân 25 | GND — Ground |
| Chân 26 | VDD — Positive supply |
| Chân 27 | NC — Not connected (per datasheet) |
| Chân 28 | NC — Not connected (per datasheet) |
| Chân 29 | RD0 — Port D bit 0 |
| Chân 30 | RD1 — Port D bit 1 |
| Chân 31 | RD2 — Port D bit 2 |
| Chân 32 | RD3 — Port D bit 3 |
| Chân 33 | RD4 — Port D bit 4 |
| Chân 34 | RD5 — Port D bit 5 |
| Chân 35 | RD6 — Port D bit 6 |
| Chân 36 | RD7 — Port D bit 7 |
| Chân 37 | RE0/RD — Port E bit 0 / read control |
| Chân 38 | RE1/WR — Port E bit 1 / write control |
| Chân 39 | RE2/CS — Port E bit 2 / chip select |
| Chân 40 | MCLR/VPP — Master clear reset / programming voltage |
Ứng dụng tiêu biểu
PIC16C64A/JW phù hợp cho 7 Áp dụngs: Industrial Control Subsystems, Automotive Body and Chassis Electronics, Consumer Appliance Controls, Security and Alarm Panels, Sensor Signal Conditioning Nodes, Engineering Development and University Labs, Legacy Maintenance and Obsolete-Equipment Repair.
Industrial Control Subsystems
The PIC16C64A/JW fits industrial control subsystems because its 8-bit Harvard RISC core delivers deterministic single-cycle instruction execution at 20 MHz, allowing 200 ns loop periods for real-time PLC-style logic. The 33 programmable I/O pins map directly to relay drivers, optocouplers and sensor arrays, while the on-chip 8-bit ADC supports 4-8 mA loop transducer monitoring. Industrial designers valued the wide 2.5–6.0 V supply tolerance for 5 V and 24 V-derived rails. Compared with modern Flash MCUs, the windowed CERDIP package allowed iterative firmware re-spin during long machine-builder development cycles before committing to OTP PIC16C64A-04/P production units.
Được đề xuất
Automotive Body and Chassis Electronics
Automotive body-electronics modules such as seat controllers, mirror adjusters, and lighting drivers used PIC16C64A/JW because of its -40 °C to +125 °C industrial/extended variants, low 15 µA active current, and 33 digital I/O lines for multiplexing switches and lamps. The USART simplified communication with body-control modules via LIN-bus bit-banging or proprietary single-wire protocols. The on-chip watchdog timer with dedicated RC oscillator enhanced reliability in noisy automotive environments. Engineers now select PIC16F or PIC18F QFN-package automotive AEC-Q100 parts, but many 1990s service tools still rely on PIC16C64A/JW for legacy vehicle diagnostics.
Được đề xuất
Consumer Appliance Controls
White-goods appliance controllers including washing machines, dishwashers, and microwave ovens historically used PIC16C64A/JW for user-interface scanning, motor triac driving, and sensor conditioning. The 8-bit ADC simplifies temperature and water-level sensing, while the PWM module drives brushless DC or universal motors without external waveform generators. With 3.5 KB of EPROM, designers stored lookup tables and state-machine firmware in a single chip. The wide 2.5–6.0 V supply tolerance accepts unregulated 5 V rails common in low-cost appliance SMPS designs. Modern replacements migrate to PIC16F1847 or PIC18F equivalents with Flash and CIP (core-independent peripherals).
Được đề xuất
Security and Alarm Panels
Security alarm panels use PIC16C64A/JW for sensor-loop monitoring, keypad scanning, and dialer/communicator control, benefiting from its 33 I/O pins that handle up to 8 wired zones plus keypads and sirens without external muxing. The hardware SSP supporting SPI and I²C interfaces to EEPROM for event-log storage and to RTC chips for time-stamping, while the USART drives the dialer modem at standard baud rates. The EPROM-based JW package supports field firmware updates during security-system development and certification, and the watchdog timer ensures panel lockup recovery. Replacement designs migrate to PIC16F or dsPIC30 parts with Flash and CIP for faster time-to-market.
Được đề xuất
Sensor Signal Conditioning Nodes
Distributed sensor nodes use PIC16C64A/JW because its 8-bit ADC combined with the PWM module implements closed-loop sensor excitation and signal conditioning in a single chip. The synchronous serial port talks to SPI temperature, pressure, and acceleration sensors, while the USART outputs a conditioned analog or digital measurement to a host controller. With 128 bytes of RAM and a 4 MHz low-power operating mode at 15 µA typical, battery-powered nodes can sleep most of the time and wake on interrupt. Modern designs replace PIC16C64A/JW with PIC16F or PIC18F QFN parts that consume <1 µA in sleep and offer higher ADC resolution.
Được đề xuất
Engineering Development and University Labs
The PIC16C64A/JW with its UV-erasable JW windowed CERDIP package is a workhorse for embedded-systems education and engineering prototype development, allowing students and engineers to iteratively erase and reprogram the same device dozens of times. The 40-pin DIP form factor fits standard solderless breadboards and ZIF sockets, and the 20 MHz clock with 200 ns instruction cycle is fast enough for teaching real-time control concepts. The PIC16C instruction set is the ancestor of all modern PIC MCUs, so academic programs use PIC16C64A/JW to introduce register-level programming before transitioning students to PIC16F, PIC18F and dsPIC families. Microchip recommends PIC16C65B for new development, but PIC16C64A/JW remains in teaching inventory.
Được đề xuất
Legacy Maintenance and Obsolete-Equipment Repair
PIC16C64A/JW continues to ship in 2026 for maintenance of legacy factory automation, military and aerospace equipment, and 1990s-era medical devices where a complete redesign would require expensive re-certification. Its 40-pin CERDIP windowed package with EPROM matches the original BOM so legacy boards can be repaired without PCB modification, and the part remains in distributor stock for spares provisioning. When existing inventory is exhausted, repair shops migrate to PIC16F74-I/P or PIC16F877A-I/P after PCB re-spin and firmware recompilation. The datasheet (DS30422D) and Microchip cross-reference tools help engineers plan transition paths from PIC16C64A/JW to current-generation Flash parts.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C64A/JW — 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 | PIC16C65B | PIC16F74-I/P | PIC16F877A-I/P |
|---|---|---|---|---|
| Package | 40-pin CERDIP Windowed (JW) | 40-pin CERDIP / PDIP | 40-pin PDIP | 40-pin PDIP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Architecture / Bit-Width | 8-bit Harvard RISC | 8-bit Harvard RISC | 8-bit Harvard RISC | 8-bit Harvard RISC |
| Program Memory Type | EPROM (UV-erasable, 3.5 KB) | EPROM | Flash (4 KB) | Flash (14 KB) |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| RAM | 128 bytes | 192 bytes | 192 bytes | 368 bytes |
| I/O Pins | 33 | 33 | 33 | 33 |
| Operating Voltage Range | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Lifecycle Status | Obsolete | Obsolete (last CERDIP generation) | Active | Active |
| Peripherals (USART / SSP / ADC) | Yes / Yes / 8-bit | Yes / Yes / 8-bit | Yes / Yes / 8-bit | Yes / Yes / 10-bit |
Bảo phân biệt quan trọng
- Windowed EPROM in CERDIP package supports iterative firmware re-spin (vsPIC16F74-I/P)
- Recommended Microchip successor with enhanced peripherals (vsPIC16C65B)
- Flash-based modern alternative with active lifecycle (vsPIC16C64A/JW (this part))
Ghi chú thiết kế
The PIC16C64A/JW operates from 2.5 V to 6.0 V with typical current of 15 µA at 5 V / 4 MHz and 1 µA at 3 V / 32 kHz sleep mode. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of pin 26 and add a 10 µF bulk capacitor near the supply entry. For battery-powered designs, leverage the watchdog timer with on-chip RC oscillator to wake the MCU periodically without an external 32 kHz crystal.
Do not expose the JW windowed CERDIP package to direct sunlight or UV sterilization lamps — both can erase EPROM contents within hours. Use a labeled socket and an opaque protective cover during development. When migrating firmware to PIC16F74-I/P, note that the Flash-based configuration-word registers, ADC acquisition time and I²C SSP behavior differ from the EPROM PIC16C64A, so recompile and revalidate before substituting.
Place the 20 MHz crystal or ceramic resonator within 5 mm of pins 7 (OSC1) and 8 (OSC2), with short traces and a ground guard ring to minimize EMI. Keep high-current switching traces (relay drivers, triacs) routed away from the oscillator and analog input pins RA0–RA5 to prevent ADC noise coupling. Use a single ground plane with separate analog/digital return paths converging at the PIC16C64A/JW GND pin (25) to preserve ADC accuracy.
Estimated: with 33 I/O pins toggling at 20 MHz, edge rates of ~5 ns produce harmonic content up to ~200 MHz that can couple into analog inputs. Source-terminate traces longer than 25 mm and add 100 Ω series resistors on high-speed outputs driving capacitive loads. Keep the USART baud-rate generator within 1% of target frequency by using a crystal rather than RC oscillator.
Thông tin tuân thủ
CERDIP packages typically contain lead in the glass seal; RoHS exemption 7a (lead in high-melting-point solder) or 7c-1 (lead in glass) may apply for this part per Microchip product documentation. AEC-Q100 not qualified — choose PIC16F-series automotive variants for AEC-Q100 designs.
