CD74HC595NS

Product Overview

• Category: Integrated Circuit
• Use: Shift Register
• Characteristics: High-Speed, Serial-In Parallel-Out
• Package: DIP (Dual In-line Package)
• Essence: 8-bit Serial-In Parallel-Out Shift Register with Output Latches
• Packaging/Quantity: Tube/25 pieces

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature: -40°C to +85°C
• Output Current: ±6mA
• Clock Frequency: 25MHz

Pin Configuration

The CD74HC595NS has a total of 16 pins. The detailed pin configuration is as follows:

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

Functional Features

• Serial-in parallel-out shift register with output latches
• High-speed operation with a clock frequency of up to 25MHz
• Wide supply voltage range allows for versatile applications
• Output enable input for easy control of output states
• Shift register clear input for resetting the register
• Storage register ground for improved noise immunity

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient data transfer - Versatile supply voltage range allows for compatibility with various systems - Output enable input provides flexibility in controlling output states - Storage register ground enhances noise immunity

Disadvantages: - Limited number of parallel outputs (8 bits) - DIP package may not be suitable for space-constrained applications

Working Principles

The CD74HC595NS is a shift register that allows serial data to be loaded and then shifted out in parallel. It consists of an 8-bit shift register and output latches. The serial data is input through the SER pin and shifted into the shift register on each rising edge of the SRCLK input. The RCLK input is used to latch the data from the shift register into the output latches, which can then be accessed in parallel through the Q0-Q7 pins. The OE input enables or disables the outputs, while the SRCLR input clears the shift register.

Detailed Application Field Plans

The CD74HC595NS has various applications in digital systems, such as:

1. LED Matrix Displays: The shift register can be used to control multiple LEDs in a matrix arrangement, allowing for efficient control and reduced pin count.
2. Serial-to-Parallel Conversion: It can be utilized to convert serial data streams into parallel data, enabling easy interfacing with parallel devices.
3. Data Multiplexing: The shift register can be employed for multiplexing data from multiple sources onto a single bus, optimizing resource utilization.
4. Address Decoding: It can be used in address decoding circuits to select specific memory locations or peripheral devices.

Detailed and Complete Alternative Models

Some alternative models to the CD74HC595NS are:

1. SN74HC595N: Similar shift register IC with the same functionality but different packaging options.
2. CD4094BE: 8-bit shift register with output latches, but with a different pin configuration and package type.
3. 74HC595D: Surface mount version of the CD74HC595NS, suitable for compact designs.

These alternative models provide similar functionality and can be used as replacements depending on specific requirements.

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