CD74HC595M

Product Overview

• Category: Integrated Circuit
• Use: Shift Register
• Characteristics: High-Speed, Serial-In Parallel-Out (SIPO), 8-Bit, 3-State Output
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The CD74HC595M 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, digital-to-analog converters, and control systems.
• Packaging/Quantity: The CD74HC595M is typically sold in reels or tubes, with each reel/tube containing a specific quantity of ICs.

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to +85°C
• Output Current: 6mA
• Clock Frequency: Up to 25MHz
• Number of Outputs: 8
• Serial Data Input: Single Line
• Parallel Data Output: 8 Lines
• Data Storage: 8-Bit Shift Register
• Output State: 3-State

Detailed Pin Configuration

The CD74HC595M has a total of 16 pins, which are assigned specific functions:

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. QH' (Serial Output)
7. QA (Parallel Output A)
8. QB (Parallel Output B)
9. QC (Parallel Output C)
10. QD (Parallel Output D)
11. QE (Parallel Output E)
12. QF (Parallel Output F)
13. QG (Parallel Output G)
14. QH (Parallel Output H)
15. VCC (Supply Voltage)
16. SRCLR (Shift Register Clear Input)

Functional Features

• High-speed operation allows for efficient data transfer.
• Serial-in parallel-out architecture enables easy conversion of serial data to parallel output.
• 3-state outputs provide flexibility in controlling the output state.
• Wide operating voltage range allows for compatibility with various systems.
• Compact SOIC package ensures space-saving integration.

Advantages and Disadvantages

Advantages: - High-speed operation facilitates quick data processing. - Versatile applications in LED displays, control systems, and more. - Compact package size saves board space. - 3-state outputs offer flexibility in controlling the output state.

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

Working Principles

The CD74HC595M operates based on a shift register principle. It receives serial data through the SER pin and shifts it into an internal 8-bit storage register on each rising edge of the SRCLK input. The RCLK input is used to latch the stored data onto the parallel output pins. The OE input controls the output enable/disable function, allowing the outputs to be tri-stated when necessary.

Detailed Application Field Plans

The CD74HC595M finds extensive use in various applications, including:

1. LED Displays: The shift register's ability to convert serial data into parallel output makes it ideal for driving multiple LEDs in displays.
2. Digital-to-Analog Converters: By using the parallel outputs, the CD74HC595M can control the analog output levels of DACs.
3. Control Systems: The shift register can be employed to control various devices or components in a system, such as relays, motors, or switches.

Detailed and Complete Alternative Models

Some alternative models to the CD74HC595M include:

1. 74HC595: Similar shift register IC with comparable specifications.
2. SN74HC595: Texas Instruments' version of the shift register, offering similar functionality.
3. CD4094: 8-bit serial-in parallel-out shift register with latch function.

These alternative models can be considered based on specific project requirements and availability.

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