PIC16C64A-04/L - 8-bit OTP MCU, 4MHz, 3.5KB | Microchip
MPN: PIC16C64A-04/L ✓ Hoạt độngPIC16C64A-04/L Tóm tắt
Background: An 8-bit microcontroller (MCU) is a single-chip computer integrating a CPU, memory (ROM/RAM), and programmable I/O peripherals. Within the MCU taxonomy, the PIC16C64A belongs to the PIC16C family, which in turn falls under the broader category of microcontrollers -> embedded processors -> integrated circuits. The PIC architecture uses a Harvard-design RISC CPU with 35 single-word instructions, making it well suited for cost-sensitive, deterministic real-time control. The OTP suffix means the program memory can be written once (mask ROM-like behavior at low NRE cost), making PIC16C64A variants appropriate for medium-volume production.
Key features include a high-performance RISC CPU executing most instructions in a single clock cycle, 4MHz operation at 4V-5.5V supply, 33 I/O pins supporting digital I/O, two 8-bit timers and one 16-bit timer/counter, a USART serial port, and low-power operation (less than 2mA typical at 5V/4MHz, with sleep-mode currents under 1uA typical). The device offers multiple interrupt sources and a hardware watchdog timer.
Architecturally, the PIC16C64A-04/L uses a Harvard memory structure with separate program and data buses, enabling simultaneous instruction fetch and operand access. Its RISC engine performs most instructions in one instruction cycle (4 oscillator clocks), giving a 4MHz oscillator a 1 MIPS instruction throughput. The wide operating voltage (2.5V-6.0V range across the family) and integrated peripherals (USART, timers, watchdog, capture/compare/PWM) eliminate external glue logic in typical embedded designs.
Typical applications include industrial process control, motor control front-ends, automotive body electronics, sensor signal conditioning, keypad/display interfaces, embedded serial-communication nodes, and legacy replacement of older 8051 or HC11 designs where software IP exists for PIC assembly. The windowed ceramic L-package also serves engineering development and prototype builds.
Design consideration: When migrating from PIC16C64A-04/L to a flash-memory equivalent (PIC16F877A or PIC16F877), note the pinout is largely compatible but the program memory technology differs. Designers should plan for ICP/ICD programming headers and decoupling (100nF + 10uF) close to VDD/VSS pins to support the 33 simultaneously-switching I/Os.
This page synthesizes distributor pricing, OTP vs flash alternatives, and practical design notes beyond what the manufacturer datasheet alone provides.
Bộ thay thế dễ dàng lắp đặt cho PIC16C64A-04/L — 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-04/L (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Mounting Type, Program Memory Size, Program Memory Type.
PIC16C65B-04/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C66-04/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F877A-04/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C64A-04I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C64A-10/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C64B-04/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C64A-04/L Tỷ lệ tối đa & tính chất điện
| Product Family | PIC16C 8-bit Microcontroller |
| Core | 8-bit RISC |
| Maximum Clock Speed | 4 MHz |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| Number of I/O Pins | 33 |
| Data EEPROM | Not present (OTP family) |
| Supply Voltage (Vdd) | 4.0 V to 5.5 V |
| Hộp | 44-pin PLCC (Leaded Chip Carrier, windowed ceramic) |
| Kiểu lắp đặt | Surface Mount |
| Number of Instructions | 35 |
| Instruction Cycle | Single cycle (except program branches, 2 cycles) |
| Watchdog Timer | Yes (hardware) |
Cấu hình chân PIC16C64A-04/L
| Chân 1 | MCLR/VPP — Master Clear (Reset) input / programming voltage |
| Chân 2 | RA0 — PORTA bit 0 (digital I/O) |
| Chân 3 | RA1 — PORTA bit 1 (digital I/O) |
| Chân 4 | RA2 — PORTA bit 2 (digital I/O) |
| Chân 5 | RA3 — PORTA bit 3 (digital I/O) |
| Chân 6 | RA4 — PORTA bit 4 (digital I/O, open-drain) |
| Chân 7 | RA5 — PORTA bit 5 (digital I/O) |
| Chân 8 | VSS — Ground |
| Chân 9 | OSC1/CLKIN — Oscillator input / external clock |
| Chân 10 | OSC2/CLKOUT — Oscillator output |
| Chân 11 | RC0 — PORTC bit 0 (digital I/O) |
| Chân 12 | RC1 — PORTC bit 1 (digital I/O) |
| Chân 13 | RC2 — PORTC bit 2 (digital I/O) |
| Chân 14 | RC3 — PORTC bit 3 (digital I/O) |
| Chân 15 | RC4 — PORTC bit 4 (digital I/O) |
| Chân 16 | RC5 — PORTC bit 5 (digital I/O) |
| Chân 17 | RC6 — PORTC bit 6 (digital I/O / TX) |
| Chân 18 | RC7 — PORTC bit 7 (digital I/O / RX) |
| Chân 19 | VSS — Ground |
| Chân 20 | VDD — Positive supply (5V nominal) |
| Chân 21 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 22 | RB1 — PORTB bit 1 (digital I/O) |
| Chân 23 | RB2 — PORTB bit 2 (digital I/O) |
| Chân 24 | RB3 — PORTB bit 3 (digital I/O / PG) |
| Chân 25 | RB4 — PORTB bit 4 (digital I/O) |
| Chân 26 | RB5 — PORTB bit 5 (digital I/O) |
| Chân 27 | RB6 — PORTB bit 6 (digital I/O / PGC) |
| Chân 28 | RB7 — PORTB bit 7 (digital I/O / PGD) |
| Chân 29 | VSS — Ground |
| Chân 30 | VDD — Positive supply (5V nominal) |
| Chân 31 | RD0 — PORTD bit 0 (digital I/O) |
| Chân 32 | RD1 — PORTD bit 1 (digital I/O) |
| Chân 33 | RD2 — PORTD bit 2 (digital I/O) |
| Chân 34 | RD3 — PORTD bit 3 (digital I/O) |
| Chân 35 | RD4 — PORTD bit 4 (digital I/O) |
| Chân 36 | RD5 — PORTD bit 5 (digital I/O) |
| Chân 37 | RD6 — PORTD bit 6 (digital I/O) |
| Chân 38 | RD7 — PORTD bit 7 (digital I/O) |
| Chân 39 | RE0 — PORTE bit 0 (digital I/O / RD) |
| Chân 40 | RE1 — PORTE bit 1 (digital I/O / WR) |
| Chân 41 | RE2 — PORTE bit 2 (digital I/O / CS) |
| Chân 42 | VSS — Ground |
| Chân 43 | VDD — Positive supply (5V nominal) |
| Chân 44 | NC — Not connected (per datasheet PLCC-44 layout) |
Ứng dụng tiêu biểu
PIC16C64A-04/L phù hợp cho 6 Áp dụngs: Industrial Process Control Front-Ends, Motor Control PWM Drive Modules, Embedded Serial Communication Nodes, Automotive Body Electronics Modules, Keypad and Display Interface Boards, Legacy Industrial Replacement and Migration.
Industrial Process Control Front-Ends
The PIC16C64A-04/L's 33 I/O pins and deterministic RISC core fit industrial control front-ends. With 4MHz / 1 MIPS throughput, the MCU reads 4-20mA sensor signals via ADC-free external signal conditioning, drives 7-segment displays, and executes PID loops at deterministic cycle times. The wide 4V-5.5V supply tolerates industrial 5V rail tolerance (+/-10%), and the watchdog timer plus POR/BOR circuitry improve field reliability. The PLCC-44 ceramic L package suits panel-mount modules where thermal cycling is moderate.
Được đề xuất
Motor Control PWM Drive Modules
The PIC16C64A-04/L drives brushed DC and stepper motor control modules using its Capture/Compare/PWM (CCP) peripheral and 16-bit timer. With a 4MHz clock, the PWM module produces 8-bit resolution at modest switching frequencies, sufficient for sub-1kW DC motor speed control in industrial automation. The 33 I/O pins handle quadrature encoder inputs, direction outputs, brake logic, and fault indicators. Note that real-time motor control at higher PWM frequencies benefits from upgrading to the PIC16F877A-20 (20MHz).
Được đề xuất
Embedded Serial Communication Nodes
The PIC16C64A-04/L serves as a serial protocol bridge node in multi-drop RS-485 or RS-232 networks, leveraging its integrated USART peripheral. The 4MHz instruction rate sustains 9600 baud software-UART on additional pins for multi-port bridging. Industrial-grade operating voltage tolerance and the hardware watchdog timer support unattended remote installations. The 128 bytes RAM handle small receive buffers, while the 3.5KB OTP stores protocol stacks for Modbus RTU or proprietary packet formats.
Được đề xuất
Automotive Body Electronics Modules
The PIC16C64A-04/L fits body-electronics modules (window lift, mirror control, lighting nodes) in automotive applications where its industrial temperature grade and 5V supply tolerance handle 12V-battery transients with external clamping. The 33 I/O drive small MOSFET switches for relays and lamps, and the hardware watchdog detects firmware lockup. New automotive designs should consider AEC-Q100 qualified PIC18 or dsPIC33 families; the OTP PIC16C64A-04/L is reserved for legacy automotive platforms.
Được đề xuất
Keypad and Display Interface Boards
The PIC16C64A-04/L scans 4x4 or 8x4 keypad matrices and drives multiplexed LED or LCD displays through its 33 I/O pins. With 4MHz / 1 MIPS, the MCU executes software-debounced key scan loops at sub-10ms response times and refreshes 7-segment displays without flicker. The wide supply range (4V-5.5V) accepts unregulated wall-adapter power, and the windowed ceramic L package supports engineering prototyping where firmware can be erased and re-programmed repeatedly.
Được đề xuất
Legacy Industrial Replacement and Migration
The PIC16C64A-04/L is widely used to maintain legacy industrial equipment originally designed around the PIC16C6X family. Engineers use the windowed ceramic L package to erase and re-program units during field service. For ongoing production, Microchip recommends migrating to PIC16F877A-04/L (flash, same PLCC-44 pinout) for field reprogrammability and supply chain continuity. Existing PIC assembly source code ports with minimal changes due to PIC16C6X code compatibility.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C64A-04/L — 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/L | PIC16F877A-04/L | PIC16C66-04/L |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin PLCC (windowed ceramic) | 44-pin PLCC - same | 44-pin PLCC - same | 44-pin PLCC - same |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory Size | 3.5 KB OTP | 7 KB OTP | 14 KB Flash | 8 KB OTP |
| RAM Size | 128 bytes | 192 bytes | 368 bytes | 256 bytes |
| EEPROM | None | None | 256 bytes | None |
| Memory Technology | OTP EPROM | OTP EPROM | Flash | OTP EPROM |
| Number of I/O Pins | 33 | 33 | 33 | 33 |
| Supply Voltage | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 2.0 V to 5.5 V (wider range) | 4.0 V to 5.5 V |
Bảo phân biệt quan trọng
- Drop-in flash-based successor with field reprogrammability (vsPIC16C65B-04/L)
- Widest program memory in the PIC16C6X family (vsPIC16C66-04/L)
- Windowed ceramic L package enables engineering prototyping (vsPIC16C64A-04I/P (40-PDIP))
Ghi chú thiết kế
Decoupling: Place a 100 nF ceramic capacitor within 5 mm of each VDD/VSS pin pair on the PLCC-44. Add a bulk 10-47 uF tantalum or aluminum electrolytic on the 5V rail. With 33 simultaneously-switching I/O pins, transient current demand peaks can reach 100 mA under worst-case load - adequate bulk capacitance prevents VDD droop that can cause POR resets. Estimated: peak transient I/O current approximately 33 pins x 25 mA sink = 825 mA theoretical max, but typical applications see 50-200 mA peaks.
Place the 4 MHz ceramic resonator or crystal as close as possible to OSC1 (pin 9) and OSC2 (pin 10), with load capacitors (typically 15-33 pF) returning to VSS. Keep the MCLR/VPP pin (pin 1) decoupled with a 10-100 nF capacitor to VSS to prevent spurious resets from noise. Route high-current I/O traces away from the oscillator circuit to avoid injected noise that can shift the clock frequency and timing accuracy.
OTP programming warning: The PIC16C64A-04/L uses One-Time Programmable EPROM that cannot be erased in-circuit. A programming error requires discarding the IC. Maintain at least 5% programming margin in production schedules. For prototypes, use the windowed ceramic L package which can be erased via UV light. Configuration word (oscillator, watchdog, code-protect) must be set correctly - an incorrect WDT setting can cause spurious resets that lock the device into a brown-out loop.
Thông tin tuân thủ
Windowed ceramic L package historically uses lead-bearing ceramic (Pb in glass seal). RoHS compliance status not explicitly stated in the verified web data for this specific windowed L variant. Industrial-grade part; not AEC-Q100 qualified.
