CD74HC595DWR

Product Overview

• Category: Integrated Circuit
• Use: Shift Register
• Characteristics: High-Speed, Serial-In Parallel-Out (SIPO), 8-Bit, DIP Package
• Package: SOIC-16
• Essence: The CD74HC595DWR is a high-speed shift register that allows serial input data to be converted into parallel output data. It is commonly used in applications where multiple outputs are required, such as LED displays and digital-to-analog converters.
• Packaging/Quantity: The CD74HC595DWR is available in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 25 MHz
• Number of Outputs: 8

Pin Configuration

The CD74HC595DWR has a total of 16 pins, which are assigned specific functions:

1. Q7' (Serial Output)
2. GND (Ground)
3. SER (Serial Data Input)
4. RCLK (Register Clock)
5. SRCLK (Shift Register Clock)
6. OE (Output Enable)
7. SRCLR (Shift Register Clear)
8. QA (Parallel Output A)
9. QB (Parallel Output B)
10. QC (Parallel Output C)
11. QD (Parallel Output D)
12. QE (Parallel Output E)
13. QF (Parallel Output F)
14. QG (Parallel Output G)
15. QH (Parallel Output H)
16. VCC (Supply Voltage)

Functional Features

• High-speed operation allows for efficient data transfer.
• Serial-in parallel-out (SIPO) functionality enables conversion of serial input data to parallel output data.
• Output enable (OE) pin provides control over the output state.
• Shift register clear (SRCLR) pin allows for resetting the shift register.
• Register clock (RCLK) and shift register clock (SRCLK) pins control the timing of data transfer.

Advantages and Disadvantages

Advantages: - High-speed operation enables quick data processing. - Compact SOIC-16 package offers space-saving benefits. - Versatile applications in various electronic devices.

Disadvantages: - Limited number of outputs (8) may not be sufficient for certain applications requiring more parallel outputs. - Requires external components for proper functioning.

Working Principles

The CD74HC595DWR operates based on the principle of shifting data through a register. The serial data is inputted through the SER pin and shifted through the shift register upon receiving clock pulses from the SRCLK pin. The parallel output data is then available at the QA to QH pins. The RCLK pin controls the transfer of data from the shift register to the output latch, which can be enabled or disabled using the OE pin.

Detailed Application Field Plans

The CD74HC595DWR finds extensive application in various fields, including:

1. LED Displays: The shift register's ability to convert serial data into parallel output makes it suitable for driving multiple LEDs in displays, such as seven-segment displays and dot matrix displays.
2. Digital-to-Analog Converters: The CD74HC595DWR can be used in digital-to-analog converters to convert digital signals into analog voltages with multiple output channels.
3. Data Storage: It can be utilized in applications where temporary storage of data is required, such as buffer registers in microcontrollers.

Alternative Models

Below are some alternative models that offer similar functionality:

1. SN74HC595N: This is a DIP package version of the CD74HC595DWR.
2. 74HCT595: This model operates at a lower voltage range (4.5V to 5.5V) compared to the CD74HC595DWR.
3. CD4094: This shift register offers additional features like latch enable and data serial output.

In conclusion, the CD74HC595DWR is a high-speed shift register integrated circuit commonly used in applications requiring multiple parallel outputs. Its compact package, versatile functionality, and wide range of applications make it a popular choice among electronic designers.

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