Encyclopedia Entry: 74HCT595D/AUJ

Product Overview

Category

The 74HCT595D/AUJ belongs to the category of integrated circuits (ICs) and specifically falls under the family of shift registers.

Use

This IC is primarily used for serial-in, parallel-out (SIPO) data shifting applications. It allows for efficient control of multiple outputs using a minimal number of pins on a microcontroller or other digital devices.

Characteristics

• High-speed operation
• Low power consumption
• Wide operating voltage range
• Compatibility with both CMOS and TTL logic levels
• Output capability of driving up to 20mA
• Schmitt-trigger action on all inputs for improved noise immunity

Package

The 74HCT595D/AUJ is available in a small-outline package (SOIC) with 16 pins. This package offers ease of handling and compatibility with standard PCB manufacturing processes.

Essence

The essence of the 74HCT595D/AUJ lies in its ability to efficiently shift and control data, making it an essential component in various digital systems and applications.

Packaging/Quantity

The 74HCT595D/AUJ is typically supplied in reels or tubes, with each reel containing 2500 units or each tube containing 75 units.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: -0.5V to VCC + 0.5V
• Operating Temperature Range: -40°C to +125°C
• Maximum Clock Frequency: 25MHz
• Maximum Output Current: 35mA
• Propagation Delay: 13ns (typical)

Detailed Pin Configuration

The 74HCT595D/AUJ has 16 pins, which are assigned specific functions as follows:

1. Q0 (Output)
2. Q1 (Output)
3. Q2 (Output)
4. Q3 (Output)
5. Q4 (Output)
6. Q5 (Output)
7. Q6 (Output)
8. Q7 (Output)
9. GND (Ground)
10. SER (Serial Data Input)
11. RCLK (Register Clock Input)
12. SRCLK (Shift Register Clock Input)
13. OE (Output Enable Input)
14. SRCLR (Shift Register Clear Input)
15. VCC (Supply Voltage)
16. Q7' (Serial Data Output)

Functional Features

• Serial data input allows for cascading multiple shift registers
• Parallel output enables simultaneous control of multiple outputs
• Shift register clock and register clock inputs provide precise timing control
• Output enable input allows for disabling the outputs when needed
• Shift register clear input resets the shift register to its initial state

Advantages and Disadvantages

Advantages

• High-speed operation facilitates efficient data shifting
• Low power consumption makes it suitable for battery-powered applications
• Wide operating voltage range enhances compatibility with various systems
• Schmitt-trigger action on inputs improves noise immunity
• Compact package size enables space-saving designs

Disadvantages

• Limited number of outputs (8 in this case) may restrict certain applications requiring more outputs
• Propagation delay may introduce timing issues in high-frequency applications

Working Principles

The 74HCT595D/AUJ operates based on the principle of serial-in, parallel-out data shifting. It receives data serially through the SER pin and shifts it into an internal shift register upon each rising edge of the SRCLK input. The data is then transferred to the parallel output registers upon a rising edge of the RCLK input. This allows for the parallel control of multiple outputs using a minimal number of pins.

Detailed Application Field Plans

The 74HCT595D/AUJ finds applications in various fields, including but not limited to: - LED matrix control - Seven-segment display multiplexing - Digital signage - Data storage and retrieval systems - Industrial automation - Robotics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74HCT595D/AUJ include: - 74HC595 - SN74HC595 - CD74HC595 - MC74HC595

These alternatives may vary in terms of manufacturer, package type, and minor specifications, but they serve the same purpose of serial-in, parallel-out data shifting.

In conclusion, the 74HCT595D/AUJ is a versatile integrated circuit that enables efficient control of multiple outputs using minimal pins. Its high-speed operation, low power consumption, and wide operating voltage range make it suitable for various digital applications. However, its limited number of outputs and propagation delay should be considered when selecting this IC for specific projects.