PIC16C64A-20E/P - 8-bit OTP MCU, 20MHz, 3.5KB, 40-PDIP | Microchip
MPN: PIC16C64A-20E/P ✗ Cuối đờiPIC16C64A-20E/P Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, digital I/O, and on-chip peripherals such as timers, capture modules, and a USART. The PIC16C family sits in the broader taxonomy of microcontroller -> embedded processor -> semiconductor device. PIC MCUs use a Harvard RISC core with only 35 single-word instructions, where all instructions execute in one cycle except program branches (two cycles), enabling deterministic real-time response in control loops.
Key features of the PIC16C64A-20E/P include five 8-bit I/O ports (PORTA-PORTE), three timer/counters (TMR0, TMR1, TMR2), a 2-capture/compare/PWM module, a USART with on-chip baud-rate generator, an 8-bit A/D converter (on selected pins), a watchdog timer with on-chip RC oscillator, and in-circuit serial programming (ICSP) via RB6/RB7. The device draws < 2 mA typical at 5 V / 4 MHz and < 1 µA typical standby current at 3 V / 32 kHz.
Architecturally, the PIC16C64A uses a 14-bit instruction word with a 8-bit data path, a hardware stack depth of 8, and direct, indirect, and relative addressing modes. The on-chip EPROM-based program store is one-time programmable (OTP), distinguishing it from the FLASH-based PIC16F family; for in-system reprogrammability the PIC16F64A or PIC16F74 family should be considered.
Typical applications include industrial process control, automotive body electronics, motor control (low-side PWM drive), smart sensor interfaces, and legacy embedded systems where the long-life, second-source PIC architecture remains specified by end customers. The 20 MHz throughput supports protocols such as RS-232, RS-485, and I2C master mode in software bit-banging.
When designing with the PIC16C64A, note that MCLR must be tied to VDD through a 10 kohm pull-up and that decoupling requires a 0.1 uF ceramic capacitor placed within 5 mm of the VDD pin. The '20E' suffix denotes 20 MHz operation, Extended temperature; 'P' denotes 40-pin PDIP. Note: this part is Not Recommended for new designs (NRND) per Microchip's product status page.
Bộ thay thế dễ dàng lắp đặt cho PIC16C64A-20E/P — 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-20E/P (cùng hình factor và footprint) — khác nhau ở Core Architecture, Package, Timers, Data EEPROM, Maximum Clock Frequency.
PIC16F74-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C64A-04I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C64A-10I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C64A-20/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F74-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C64A-20E/P Tỷ lệ tối đa & tính chất điện
| Series | PIC 16C |
| Core Architecture | 8-bit RISC (Harvard) |
| Instruction Set | 35 single-word instructions |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 3.5 KB (2K x 14) |
| Data RAM | 192 bytes |
| Data EEPROM | Not present |
| Tần số xung maksimum | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Supply Voltage Range | 3.0 V to 6.0 V |
| Khoảng nhiệt độ hoạt động | -40C to +125C (Extended, 'E' suffix) |
| I/O Pins | 33 (PORTA-PORTE, 8-bit bidirectional) |
| Timers | 3 (TMR0, TMR1, TMR2) |
| Capture/Compare/PWM | 1 module, 16-bit |
| Communication | USART with on-chip baud-rate generator |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| In-Circuit Programming | ICSP (RB6/RB7) |
| Hộp | 40-pin PDIP (0.600 in / 15.24 mm) |
| Kiểu lắp đặt | Through-Hole |
Cấu hình chân PIC16C64A-20E/P
| Chân 1 | MCLR — Master Clear (Reset, active low) - tie to VDD via 10 kohm |
| Chân 2 | RA0 — PORTA bit 0 (digital I/O or analog AN0 on '65/'66/'67) |
| Chân 3 | RA1 — PORTA bit 1 |
| Chân 4 | RA2 — PORTA bit 2 |
| Chân 5 | RA3 — PORTA bit 3 |
| Chân 6 | RA4 — PORTA bit 4 (open-drain, T0CKI clock input) |
| Chân 7 | RA5 — PORTA bit 5 (also /SS input on synchronous SPI) |
| Chân 8 | RE0 — PORTE bit 0 (/RD control for parallel slave port) |
| Chân 9 | RE1 — PORTE bit 1 (/WR control for parallel slave port) |
| Chân 10 | RE2 — PORTE bit 2 (/CS control for parallel slave port) |
| Chân 11 | VDD — Positive supply (3.0 V to 6.0 V) |
| Chân 12 | VSS — Ground reference |
| Chân 13 | OSC1 — Crystal oscillator or external clock input |
| Chân 14 | OSC2 — Crystal oscillator output (or RC mode clock out) |
| Chân 15 | RC0 — PORTC bit 0 (T1OSO timer1 oscillator output) |
| Chân 16 | RC1 — PORTC bit 1 (T1OSI timer1 oscillator input) |
| Chân 17 | RC2 — PORTC bit 2 (CCP1 PWM output) |
| Chân 18 | RC3 — PORTC bit 3 (SCL I2C clock or SPI clock) |
| Chân 19 | RD0 — PORTD bit 0 (parallel slave port data) |
| Chân 20 | RD1 — PORTD bit 1 |
| Chân 21 | RD2 — PORTD bit 2 |
| Chân 22 | RD3 — PORTD bit 3 |
| Chân 23 | RC4 — PORTC bit 4 (SDA I2C data or SPI data input) |
| Chân 24 | RC5 — PORTC bit 5 (SPI data output) |
| Chân 25 | RC6 — PORTC bit 6 (TX USART asynchronous transmit) |
| Chân 26 | RC7 — PORTC bit 7 (RX USART asynchronous receive) |
| Chân 27 | RD4 — PORTD bit 4 |
| Chân 28 | RD5 — PORTD bit 5 |
| Chân 29 | RD6 — PORTD bit 6 |
| Chân 30 | RD7 — PORTD bit 7 |
| Chân 31 | VSS — Ground reference (second pin for noise isolation) |
| Chân 32 | VDD — Positive supply (second pin) |
| Chân 33 | RB0 — PORTB bit 0 (external interrupt INT) |
| Chân 34 | RB1 — PORTB bit 1 |
| Chân 35 | RB2 — PORTB bit 2 |
| Chân 36 | RB3 — PORTB bit 3 |
| Chân 37 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Chân 38 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Chân 39 | RB6 — PORTB bit 6 (ICSP clock, interrupt-on-change) |
| Chân 40 | RB7 — PORTB bit 7 (ICSP data, interrupt-on-change) |
Ứng dụng tiêu biểu
PIC16C64A-20E/P phù hợp cho 6 Áp dụngs: Industrial Process Control, Automotive Body Electronics (Legacy), Smart Sensor Interface Node, Motor Speed Control (Low-side PWM), Embedded Serial Display Terminal, Legacy Industrial Controller Retrofit.
Industrial Process Control
The PIC16C64A-20E/P suits industrial process control boards running closed-loop PID at moderate sample rates. Its 20 MHz clock yields 5 MIPS, which is sufficient to bit-bang RS-485 or Modbus RTU at 9600 baud while servicing one capture input for pulse counting. The 33 digital I/O lines drive opto-isolated inputs and relay outputs directly without external latches. Extended temperature grading (-40C to +125C) supports factory-floor enclosures, and the USART with on-chip baud-rate generator eliminates an external crystal for the comms interface. The 192-byte RAM limits stack depth, so avoid recursive algorithms.
Được đề xuất
Automotive Body Electronics (Legacy)
The PIC16C64A-20E/P historically powered body-electronics modules such as window lifters, seat controllers, and HVAC blend-door actuators. The Extended -40C to +125C temperature range and 6 V tolerant VDD cover 12 V automotive transients after regulation. The PWM module drives brushed DC motors for mirror adjustment; the A/D converter reads NTC thermistor inputs from cabin sensors. The OTP program memory suits cost-sensitive, fixed-function modules where firmware is locked at production.
Được đề xuất
Smart Sensor Interface Node
The PIC16C64A-20E/P can serve as a sensor interface node on a 4-20 mA current loop or RS-485 multi-drop bus. Its 8-bit A/D converter (on the PIC16C65/66/67 pin-compatible variants) reads analog sensors with 0.4% resolution after calibration. The USART generates standard baud rates without a host processor, and the watchdog timer with on-chip RC oscillator recovers from ESD-induced software lockups. Sleep current under 1 µA at 3 V supports battery-sleep duty cycling in remote sensor applications.
Được đề xuất
Motor Speed Control (Low-side PWM)
The PIC16C64A-20E/P drives low-side PWM motor controllers for small DC and unipolar stepper motors up to ~1 A. The Capture/Compare/PWM module delivers a hardware PWM at up to 20 kHz without CPU overhead, while TMR2 provides the period base. The 33 I/O lines accept quadrature encoder feedback for closed-loop speed regulation. Rated to 6 V VDD, the device can be powered directly from a 5 V regulated bus without level shifting to logic-level gate drivers.
Được đề xuất
Embedded Serial Display Terminal
The PIC16C64A-20E/P can act as a low-cost serial-to-parallel interface for character LCD or vacuum-fluorescent displays. The USART receives ASCII data at standard baud rates and the 8-bit PORTA-PORTE pins drive the LCD in 4-bit or 8-bit parallel mode. The 192-byte RAM holds one display line plus a small command interpreter. Combined with the 20 MHz instruction rate, full screen redraws of 16x2 character LCDs complete in milliseconds via software-driven strobing.
Được đề xuất
Legacy Industrial Controller Retrofit
The PIC16C64A-20E/P remains in service as a pin-compatible replacement for original PIC16C64-04/P and PIC16C64-10/P sockets in long-life industrial equipment. The 40-pin PDIP footprint is mechanically identical to the older PIC16C64, allowing board-level swaps without PCB rework. The 20 MHz speed grade exceeds the older 4 MHz and 10 MHz parts, so existing firmware executes faster; code timing loops may require recalibration if delays were calibrated for the slower grades.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C64A-20E/P — 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 | PIC16F74-I/P | PIC16C64A-04I/P | PIC16C64A-10I/P | PIC16C64A-20/P |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin PDIP | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same |
| Program Memory | 3.5 KB OTP | 4 KB FLASH | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP |
| Maximum Clock | 20 MHz | 20 MHz | 4 MHz | 10 MHz | 20 MHz |
| Data RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) |
| Memory Type | OTP EPROM (one-time) | FLASH (10K erase cycles) | OTP EPROM | OTP EPROM | OTP EPROM |
| Lifecycle Status | NRND (Not Recommended for new designs) | Active | NRND | NRND | Active |
Bảo phân biệt quan trọng
- Higher clock speed than the 04 and 10 MHz siblings in the same PIC16C64A family (vsPIC16C64A-04I/P)
- Extended -40C to +125C temperature range vs commercial 0C to +70C of PIC16C64A-20/P (vsPIC16C64A-20/P)
- OTP program memory costs less than FLASH-based PIC16F74 in low-volume runs (vsPIC16F74-I/P)
Ghi chú thiết kế
Power the PIC16C64A-20E/P from a regulated 3.0 V to 6.0 V supply. Place a 0.1 uF decoupling capacitor within 5 mm of VDD (pin 11) and a bulk 10 uF tantalum or aluminum electrolytic capacitor on the supply rail. Both VDD pins (11 and 32) and both VSS pins (12 and 31) must be connected; floating any of these can cause latch-up or ADC reference drift. For battery applications, the on-chip brown-out reset is unavailable on this family - implement external voltage supervision with a discrete reset IC such as the MCP130.
Route the 20 MHz crystal traces symmetrically and keep them short (under 10 mm). Use a grounded guard ring around OSC1/OSC2 to prevent the oscillator from coupling into adjacent analog or EEPROM signals. MCLR must connect to VDD through a 10 kohm resistor; do not drive MCLR directly from a logic output without isolation. For in-circuit serial programming, expose RB6 and RB7 on a 6-pin header with VDD, VSS, and MCLR to enable field firmware update during the PIC16C64A NRND lifetime window.
Do not assume the PIC16C64A's PORTA includes the A/D converter - the PIC16C64A is the digital-only member of the PIC16C6X family; A/D appears only on PIC16C65/C65A/C66/C67. Do not connect external EEPROM I2C devices to SCL/SDA without pull-up resistors to VDD - the PIC16C64A's PORTC has no internal weak pull-ups on RC3/RC4. Finally, note that OTP memory cannot be erased - a programming error on the PIC16C64A permanently bricks the device; develop and debug firmware on a PIC16F74-I/P or windowed PIC16C64A JW version first.
Thông tin tuân thủ
RoHS compliance and lead-free status not stated in the verified web data. As an older EPROM-based OTP part originally released in the 1990s, PIC16C64A-20E/P may not be RoHS compliant - confirm with Microchip or distributor before using in RoHS-restricted regions.
