High-Speed Serial-to-Parallel Shift Register for Digital Control Systems
的 SN74HC595N is a high-speed, 8-bit serial-in, parallel-out shift register with a storage register and 3-state outputs. Manufactured by 德州儀器 (TI), this device is part of the HC logic family and is widely used in digital electronics for expanding output capabilities in microcontroller-based systems. With its robust performance, low power consumption, and ease of integration, it is a preferred choice for engineers and designers working on industrial, automotive, and consumer electronics applications.
Technical Overview of the SN74HC595N Shift Register
This device is designed to convert serial data input into parallel output, making it ideal for applications where microcontroller I/O pins are limited. The SN74HC595N features a serial input (DS), a shift register clock input (SHCP), a storage register clock input (STCP), and an output enable (OE) pin. It allows cascading of multiple devices for extended output capabilities, making it scalable for complex systems.
暢銷產品
主要功能
- 8-bit serial-in, parallel-out shift register
- 3-state outputs for bus-oriented applications
- Wide operating voltage range: 2V to 6V
- High-speed CMOS technology
- 低功耗
- Direct interface with TTL devices
- Output drive capability: ±6 mA at 5V
技術規格
| 參數 | 價值 |
|---|---|
| Logic Family | HC (High-Speed CMOS) |
| Number of Bits | 8 |
| Supply Voltage (Vcc) | 2V to 6V |
| 輸入電壓範圍 | 0V 至 Vcc |
| High-Level Output Current | -6 mA at 5V |
| Low-Level Output Current | 6 mA at 5V |
| Propagation Delay (tpd) | 15 ns (typical at 5V) |
| 操作溫度範圍 | -40°C to 85°C |
| 包裝類型 | DIP-16 |
Why Choose This Shift Register Over Alternatives?
The SN74HC595N offers several performance advantages over typical shift registers in the same category. Its high-speed CMOS technology ensures faster data transfer and lower power consumption, which is critical in battery-powered and high-efficiency systems. Unlike older TTL-based devices, this model supports a wider voltage range, making it more versatile for modern microcontroller platforms such as Arduino, STM32, and Raspberry Pi.
Another key benefit is its 3-state output capability, which allows multiple devices to share the same output lines without interference. This feature is essential in bus-oriented systems where multiple devices communicate over a shared data line. Additionally, the ability to cascade multiple units enables designers to expand output lines without increasing microcontroller pin usage, reducing system complexity and cost.
精選產品
According to industry professionals and embedded system engineers, the SN74HC595N is a go-to solution for reliable and scalable output expansion. Its proven performance in industrial and commercial applications has made it a staple in the electronics design community.
工業與消費性電子產品的典型應用
The SN74HC595N is widely used in applications that require multiple digital outputs controlled by a limited number of microcontroller pins. Common use cases include:
聯絡我們
- LED matrix displays and 7-segment displays
- Keypad scanning and input/output expansion
- Industrial automation control panels
- Consumer electronics such as digital clocks and home appliances
- Robotics for controlling multiple actuators or indicators
Its compact DIP-16 package and ease of use make it ideal for both prototyping and mass production environments.
About Texas Instruments (TI)
德州儀器 is a globally recognized leader in analog and embedded processing semiconductor solutions. With decades of innovation and a strong commitment to quality, TI components are trusted by engineers worldwide. The SN74HC595N is part of TI’s extensive portfolio of logic devices, known for their reliability, performance, and long-term availability.
常見問題 (FAQ)
1. What is the main function of this shift register?
The SN74HC595N converts serial data input into parallel output, allowing microcontrollers to control multiple outputs using only a few pins. It is ideal for expanding digital I/O capabilities.
2. Can I cascade multiple units for more outputs?
Yes, the device supports cascading. You can connect the QH’ (serial out) of one unit to the DS (serial in) of the next to control multiple 8-bit registers in series.
3. Is this device compatible with 3.3V microcontrollers?
Yes, the SN74HC595N operates from 2V to 6V, making it compatible with both 3.3V and 5V logic levels. Always ensure voltage levels match your system requirements.
4. What is the benefit of 3-state outputs?
3-state outputs allow the device to disconnect from the output bus when not in use, enabling multiple devices to share the same output lines without conflict or interference.
5. What package type is available for this model?
The SN74HC595N is available in a DIP-16 package, which is suitable for through-hole PCB designs and breadboard prototyping, offering ease of handling and soldering.</
