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74HC595

Name: 74HC595
Rating: 4.7 (12 reviews)

IC 74HC595 8-Bit Shift Register

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規格

Series	74HC
Part Status	Active
Mounting Type	Through Hole

概述

Description

The 74HC595 is an 8-bit shift register with an integrated latch and output driver, commonly used in digital circuits for extending the number of output pins. It allows serial input and parallel output, making it ideal for applications where multiple output pins are required but the microcontroller has limited I/O capabilities.
The 74HC595 operates using three primary pins: the data input (SER), a clock pin (SRCLK), and a latch pin (RCLK). Data is shifted in on the rising edge of the clock signal, and the output state can be latched to the output pins using the latch pin. The chip also features cascading capability, allowing multiple 74HC595 chips to be connected together to increase the number of outputs.
This IC is widely used in LED displays, shift registers, and other applications requiring efficient control of multiple outputs while minimizing the number of pins used on a microcontroller. Its ease of use and versatility make it a popular choice among hobbyists and professionals alike.

Features

The 74HC595 is an 8-bit shift register with a serial input and parallel output, commonly used for expanding the number of output pins in microcontroller applications. Key features include:
1. 8-bit Storage: Stores 8 bits of data, allowing control of multiple outputs with fewer microcontroller pins.
2. Serial In, Parallel Out: Data is shifted in serially and can be output in parallel format.
3. Cascade Capability: Multiple 74HC595 chips can be connected in series for increased output (up to 64 bits with 8 chips).
4. Latch Functionality: Has a separate latch to hold outputs stable while new data is shifted in.
5. High-Speed Operation: Operates at high speeds (up to 100 MHz), suitable for fast applications.
6. 3-State Outputs: Outputs can be set to a high impedance state, allowing for easy interfacing with other devices.
7. Wide Voltage Range: Operates at 2V to 6V, making it versatile for various projects.
These features make the 74HC595 ideal for applications in LED driving, multiplexing, and other digital control tasks.

Package

The 74HC595 is commonly available in a 16-pin Dual In-Line Package (DIP), a 16-pin Small Outline Integrated Circuit (SOIC), and a 16-pin Thin Shrink Small Outline Package (TSSOP). These packages facilitate easy integration into various electronic circuits and systems.

Pinout

The 74HC595 is an 8-bit serial-in, parallel-out shift register with output latches. It has a pin count of 16. The key pins and their functions are:
1. VCC (Pin 1): Power supply.
2. GND (Pin 8): Ground.
3. DS (Pin 2): Serial data input.
4. OE (Pin 3): Output enable (active low).
5. ST_CP (Pin 4): Storage register clock (latch data to outputs).
6. SH_CP (Pin 11): Shift register clock (shifts data into the register).
7. MR (Pin 10): Master reset (active low, resets the register).
8. Q0-Q7 (Pins 15-7): Parallel output pins (Q0 is the first bit shifted in).
The device allows for easy expansion of output pins using a serial data interface, making it ideal for driving LEDs and other peripherals.

Manufacturer

The 74HC595 is a commonly used shift register manufactured by several semiconductor companies, with Texas Instruments (TI) being one of the most recognized suppliers. Texas Instruments is a global technology company primarily focused on designing and manufacturing semiconductors and various integrated circuits. Founded in 1930 and headquartered in Dallas, Texas, TI develops products for a wide range of applications, including embedded systems, automotive, industrial, and consumer electronics. They are known for their innovation in analog and digital signal processing, microcontrollers, and other electronic components. Other manufacturers of the 74HC595 include Nexperia, ON Semiconductor, and Fairchild Semiconductor, among others, all of which are involved in the semiconductor industry, providing components essential for modern electronic devices.

Application

The 74HC595 is commonly used in applications for expanding output ports in microcontrollers, such as driving LEDs, seven-segment displays, and LCD backlights. It is also utilized in shift registers for creating complex lighting effects, controlling motors, and interfacing with sensors. Other areas include creating multiplexed displays, managing multiple output devices with minimal pin usage, and facilitating communication in daisy-chained setups, such as in LED matrix displays or robotic control systems.

Equivalent

Equivalent products of the 74HC595 chip include the 74HCT595, 74AC595, 74AHC595, and 74LS595. These alternatives may vary in voltage levels, speed, and power consumption, but they typically serve the same function as an 8-bit shift register with output latches. Always check the specific datasheet for compatibility with your application.