PIC16C65B/JW - 8-bit EPROM MCU, 20MHz, 7KB | Microchip
MPN: PIC16C65B/JW ✗ Cuối đờiPIC16C65B/JW Tóm tắt
An EPROM microcontroller is a one-time- or limited-programmable device whose program memory can be erased by exposing the die to ultraviolet light through a transparent quartz window on the package. PIC16Cxx parts sit within the broader PIC mid-range hierarchy (PIC10/12/14/16/18) and historically served as the workhorse 8-bit controller family before being superseded by flash-based PIC16F and enhanced mid-range PIC16F1xxx families. They are widely used in development, education, and legacy industrial systems where code revision history matters.
Key features of the PIC16C65B/JW include 33 digital I/O pins, three timer modules (Timer0 8-bit with prescaler, Timer1 16-bit with prescaler and external crystal sleep-increment support, Timer2 8-bit), a synchronous serial port (SSP) supporting SPI and I2C, a USART for asynchronous/synchronous serial communication, an 8-bit ADC, two analog comparators, a parallel slave port, and a Brown-out Reset (BOR) circuit. The fully-static CMOS core, wide operating voltage range, and low power consumption (15 µA typical at 5V/4MHz; 1 µA typical at 3V/32kHz) make it suitable for battery-backed instrumentation.
The architecture uses a Harvard structure with separate program and data buses, a 14-bit instruction word, and a hardware stack. EPROM code memory is accessed through a 14-bit program counter, while the 192-byte file-register SRAM holds general-purpose and special-function registers. The instruction set includes single-cycle branches, bit manipulation, and table-read operations for constant data access.
Typical applications include industrial control logic, embedded instrumentation, automotive subsystems (pre-CAN-era), motor control, sensor interfaces, and educational development platforms. The JW (windowed CERDIP) package allows repeated erasure and reprogramming, making it ideal for prototyping and code iteration.
Designers should note that the PIC16C65B/JW is in the mature/legacy product category; new designs should consider flash-based PIC16F or PIC16F1xxx replacements. The windowed package is not hermetically sealed against moisture and should be protected with a sticker or socket cap when not under UV erasure.
This page combines pricing context, drop-in alternative coverage, and practical design notes for engineers still supporting or migrating PIC16C65B-based systems.
Bộ thay thế dễ dàng lắp đặt cho PIC16C65B/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 PIC16C65B/JW (cùng hình factor và footprint) — khác nhau ở Package, Program Memory Size, Mounting Type, Instruction Set, Timers.
PIC16C65B-04/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65B-20/P
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C65B-04I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F74-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C63A/JW
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65B/JW Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit mid-range (Harvard) |
| Program Memory Type | EPROM (UV-erasable, windowed CERDIP) |
| Program Memory Size | 7 KB (4K x 14 bits) |
| RAM Size | 192 bytes |
| Maximum CPU Clock | 20 MHz |
| Operating Voltage Range | 2.5 V to 6.0 V |
| Digital I/O Pins | 33 |
| Timer Modules | Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit) |
| Communication Peripherals | USART (SCI), SSP (SPI/I2C), Parallel Slave Port |
| Analog Peripherals | 8-bit ADC, 2 analog comparators |
| Hộp | 40-pin CERDIP Window (JW), 0.600 in (15.24 mm) row spacing |
| Kiểu lắp đặt | Through-Hole (DIP) |
| Temperature Grade | Commercial |
| Instruction Word Length | 14 bits |
Cấu hình chân PIC16C65B/JW
| Chân 1 | MCLR/VPP — Master Clear (Reset) input / programming voltage |
| Chân 2 | RA0/AN0 — Port A bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — Port A bit 1 / analog input 1 |
| Chân 4 | RA2/AN2/VREF- — Port A bit 2 / analog input 2 / ADC VREF- |
| Chân 5 | RA3/AN3/VREF+ — Port A bit 3 / analog input 3 / ADC VREF+ |
| Chân 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — Port A bit 5 / analog input 4 / SSP slave select |
| Chân 8 | RE0/RD/AN5 — Port E bit 0 / Parallel Slave Port read / analog input 5 |
| Chân 9 | RE1/WR/AN6 — Port E bit 1 / Parallel Slave Port write / analog input 6 |
| Chân 10 | RE2/CS/AN7 — Port E bit 2 / Parallel Slave Port chip select / analog input 7 |
| Chân 11 | VDD — Positive supply voltage |
| Chân 12 | VSS — Ground reference |
| Chân 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Chân 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Chân 15 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 module |
| Chân 17 | RC2/CCP1 — Port C bit 2 / CCP1 (Capture/Compare/PWM) |
| Chân 18 | RC3/SCK/SCL — Port C bit 3 / SSP SPI clock / I2C clock |
| Chân 19 | RC4/SDI/SDA — Port C bit 4 / SSP SPI data in / I2C data |
| Chân 20 | RC5/SDO — Port C bit 5 / SSP SPI data out |
| Chân 21 | RC6/TX/CK — Port C bit 6 / USART TX / USART clock |
| Chân 22 | RC7/RX/DT — Port C bit 7 / USART RX / USART data |
| Chân 23 | RD0/PSP0 — Port D bit 0 / Parallel Slave Port data bit 0 |
| Chân 24 | RD1/PSP1 — Port D bit 1 / Parallel Slave Port data bit 1 |
| Chân 25 | RD2/PSP2 — Port D bit 2 / Parallel Slave Port data bit 2 |
| Chân 26 | RD3/PSP3 — Port D bit 3 / Parallel Slave Port data bit 3 |
| Chân 27 | RD4/PSP4 — Port D bit 4 / Parallel Slave Port data bit 4 |
| Chân 28 | RD5/PSP5 — Port D bit 5 / Parallel Slave Port data bit 5 |
| Chân 29 | RD6/PSP6 — Port D bit 6 / Parallel Slave Port data bit 6 |
| Chân 30 | RD7/PSP7 — Port D bit 7 / Parallel Slave Port data bit 7 |
| Chân 31 | VSS — Ground reference (secondary) |
| Chân 32 | VDD — Positive supply voltage (secondary) |
| Chân 33 | RB0/INT — Port B bit 0 / external interrupt |
| Chân 34 | RB1 — Port B bit 1 |
| Chân 35 | RB2 — Port B bit 2 |
| Chân 36 | RB3 — Port B bit 3 (also low-voltage programming) |
| Chân 37 | RB4 — Port B bit 4 |
| Chân 38 | RB5 — Port B bit 5 |
| Chân 39 | RB6/PGC — Port B bit 6 / ICSP clock |
| Chân 40 | RB7/PGD — Port B bit 7 / ICSP data |
Ứng dụng tiêu biểu
PIC16C65B/JW phù hợp cho 6 Áp dụngs: Industrial Control Logic, Embedded Instrumentation, Educational Development Platforms, Sensor Interface Hubs, Motor Control Subsystems, Legacy Industrial System Maintenance.
Industrial Control Logic
The PIC16C65B/JW fits industrial control logic because its 20 MHz clock, 7 KB EPROM, and 33 I/O pins handle relay driving, switch debouncing, and sequencing without external logic. The Brown-out Reset and watchdog timer add robustness for 24V-derived rails that may sag during motor starts. The wide 2.5 V to 6.0 V operating range supports both 5 V and 3.3 V sensor interfaces. Designers pair the JW windowed variant with UV erase to iterate ladder-logic replacement firmware during commissioning.
Được đề xuất
Embedded Instrumentation
The PIC16C65B/JW suits embedded instrumentation because its 8-bit ADC, two analog comparators, and USART enable sensor acquisition and serial reporting in a single chip. The 192-byte RAM is sufficient for circular data buffers in slow-logging applications (temperature, pressure, flow). Low-power consumption (15 µA typical at 5 V/4 MHz; 1 µA typical at 3 V/32 kHz) extends battery life in portable meters. The JW window allows firmware revision in the field without replacing the part.
Được đề xuất
Educational Development Platforms
The PIC16C65B/JW is widely used in university microcontroller courses and hobbyist development boards because the JW window allows students to erase and reprogram dozens of times during lab exercises. The PIC mid-range instruction set is small enough to teach by hand yet representative of RISC embedded cores. The 40-pin DIP form factor fits standard solderless breadboards, and the device is supported by MPLAB IDE and the PM3 universal programmer from Microchip.
Được đề xuất
Sensor Interface Hubs
The PIC16C65B/JW serves as a sensor interface hub because its SSP supports both SPI and I2C, letting it aggregate data from multiple digital sensors (accelerometers, EEPROM, RTCs). The 33 I/O pins accommodate several chip-select lines, interrupt sources, and status LEDs. The PIC16C65B's 7 KB program memory holds protocol stacks and lookup tables that smaller PIC16C55/57 devices cannot. Engineers migrating to production typically swap the JW part for PIC16F74-I/P without firmware changes beyond recompilation.
Được đề xuất
Motor Control Subsystems
The PIC16C65B/JW handles motor control subsystems because its three timers (Timer0 8-bit, Timer1 16-bit, Timer2 8-bit with PWM) generate the timing signals needed for brushed DC, stepper, and unipolar BLDC commutation. The 20 MHz instruction cycle provides 200 ns resolution for high-frequency PWM. Two analog comparators implement current sensing, and the 33 I/O lines drive H-bridge enable and direction logic. The JW package supports iterative tuning of acceleration profiles in development.
Được đề xuất
Legacy Industrial System Maintenance
The PIC16C65B/JW is critical for maintaining legacy industrial systems installed in the late 1990s and early 2000s, where the part was a standard controller for PLC-style I/O modules, CNC peripherals, and HVAC damper actuators. Spare PIC16C65B/JW inventory allows field replacement without redesign, keeping manufacturing lines running. For modernization, designers often migrate to PIC16F74-I/P or PIC16F877A, preserving the 40-pin PDIP form factor and PIC mid-range instruction set to minimize validation cost.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C65B/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-04/P | PIC16C65B-20/P | PIC16C65B-04I/P | PIC16F74-I/P | PIC16C63A/JW |
|---|---|---|---|---|---|---|
| Package | 40-pin CERDIP Window (JW) | 40-pin PDIP (OTP) | 40-pin PDIP (OTP) | 40-pin PDIP (OTP, industrial) | 40-pin PDIP (Flash) | 40-pin CERDIP Window (JW) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | EPROM (UV-erasable) | EPROM OTP | EPROM OTP | EPROM OTP | Flash | EPROM (UV-erasable) |
| Program Memory Size | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 4 KB (2K x 14) |
| Maximum CPU Clock | 20 MHz | 4 MHz | 20 MHz | 4 MHz | 20 MHz | 20 MHz |
| RAM Size | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| Digital I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| Operating Voltage Range | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.0 V to 5.5 V | 2.5 V to 6.0 V |
| Lifecycle Status | NRND | NRND | NRND | NRND | Active | NRND |
Bảo phân biệt quan trọng
- UV-erasable windowed package (vsPIC16C65B-20/P (OTP plastic DIP))
- Flash-based modern replacement available (vsPIC16C65B-20/P (EP))
- More program memory than PIC16C63A/JW (vsPIC16C63A/JW)
- Higher maximum clock than -04 variants (vsPIC16C65B-04/P)
Ghi chú thiết kế
The PIC16C65B/JW operates from 2.5 V to 6.0 V. Decouple VDD (pins 11 and 32) with a 100 nF ceramic capacitor placed within 10 mm of the package pins, plus a bulk 10 µF tantalum or aluminum electrolytic capacitor at the board entry point. The VSS pins (12 and 31) should both be connected to the ground plane through short, wide traces. Brown-out Reset is enabled via the configuration word to protect against voltage sags below the safe operating threshold.
Keep the oscillator traces (OSC1 pin 13 and OSC2 pin 14) short and symmetric. Place the crystal or resonator within 10 mm of the device with ground-plane isolation to reduce stray capacitance and EMI pickup. When using an external clock, drive OSC1 only and leave OSC2 floating or grounded through a small capacitor. Route the MCLR/VPP pin (pin 1) with a 10 kΩ pull-up to VDD and a 100 nF capacitor to ground for noise immunity.
Protect the JW window with an opaque sticker during operation; ambient UV light (including direct sunlight) can erase EPROM over weeks. Use a UV eraser with 253.7 nm wavelength at 12,000 µW·sec/cm² for 20-30 minutes to fully erase. Verify the configuration word is set correctly (oscillator selection, watchdog timer enable, Brown-out Reset, code protection) before programming; an incorrect configuration word can lock out debugging or cause unexpected resets.
When migrating from PIC16C65B/JW to PIC16F74-I/P, no PCB changes are required - both share the 40-pin PDIP footprint with identical pinout. However, recompile the firmware using PIC16F74 header files and configuration-bit definitions; the configuration word register address and bit positions differ between the C and F families. Program the F-series part via ICSP (RB6/RB7) using MPLAB IPE or the PM3 programmer rather than UV erasure.
Thông tin tuân thủ
Ceramic-windowed CERDIP packages from the PIC16C family are typically pre-RoHS-era. RoHS/REACH compliance data not found in verified web sources for the JW windowed variant; for compliance-critical designs use the plastic PDIP PIC16C65B-20/P or PIC16F74-I/P. AEC-Q100 not applicable - automotive new designs should consider PIC16F874A or PIC18F parts.
