CD74HC595E

Product Overview

• Category: Integrated Circuit
• Use: Shift Register
• Characteristics: High-Speed, Serial-In Parallel-Out (SIPO), 8-Bit Shift Register with Output Latches
• Package: 16-Pin DIP (Dual In-Line Package)
• Essence: The CD74HC595E is a versatile shift register IC that allows serial data input and parallel data output. It is commonly used in various digital applications for controlling multiple outputs using minimal microcontroller pins.
• Packaging/Quantity: Available in tubes or reels, with quantities varying based on manufacturer specifications.

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 25 MHz
• Number of Stages: 8
• Output Current: ±6 mA
• Propagation Delay: 13 ns (typical)

Detailed Pin Configuration

The CD74HC595E has a total of 16 pins, each serving a specific purpose:

1. Q0: Serial Data Output
2. Q1-Q7: Parallel Data Outputs
3. GND: Ground
4. SER: Serial Data Input
5. SRCLK: Shift Register Clock Input
6. RCLK: Register Clock Input
7. OE: Output Enable Input
8. VCC: Supply Voltage

Functional Features

• Serial-in Parallel-out (SIPO) operation
• Cascadable for expanding the number of outputs
• Output latches for holding data
• High-speed operation
• Low power consumption
• Wide operating voltage range

Advantages and Disadvantages

Advantages

• Allows control of multiple outputs using fewer microcontroller pins
• Easy to interface with microcontrollers and other digital devices
• Cascadable for expanding the number of outputs
• High-speed operation enables real-time applications
• Low power consumption

Disadvantages

• Limited number of output stages (8 in this case)
• Requires additional components for proper functionality (clock signals, power supply, etc.)
• Not suitable for high-current applications

Working Principles

The CD74HC595E operates based on a shift register principle. It receives serial data through the SER pin and shifts it into its internal registers with each clock pulse applied to the SRCLK input. The RCLK input is used to latch the parallel data from the internal registers onto the output pins. The OE pin allows enabling or disabling the outputs.

Detailed Application Field Plans

The CD74HC595E finds applications in various fields, including:

1. LED Matrix Displays: Controlling multiple LEDs using limited microcontroller pins.
2. Seven-Segment Displays: Driving multiple seven-segment displays with minimal pin usage.
3. Motor Control: Sequentially controlling multiple motors or relays.
4. Data Storage: Serial-to-parallel conversion for storing data in parallel format.
5. Multiplexing: Expanding the number of inputs/outputs in digital systems.

Detailed and Complete Alternative Models

Some alternative models that serve similar functions to the CD74HC595E are:

1. 74HC595: Similar functionality, but with different package options.
2. SN74HC595: Texas Instruments' version of the shift register IC.
3. CD4094: 8-bit shift register with latches and tri-state outputs.

These alternatives can be considered based on specific requirements and availability.

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