MM74HC595M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Shift Register
• Characteristics: Serial-In, Parallel-Out, High-Speed, CMOS Logic
• Package: 16-pin SOIC (Small Outline Integrated Circuit)
• Essence: The MM74HC595M is a high-speed CMOS shift register that can be used to expand the number of outputs in a microcontroller or other digital circuit.
• Packaging/Quantity: Available in reels of 2500 units

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
• Output Voltage: VCC - 0.5V

Pin Configuration

The MM74HC595M has a total of 16 pins. The pin configuration is as follows:

1. Q0 (Output 0)
2. Q1 (Output 1)
3. Q2 (Output 2)
4. Q3 (Output 3)
5. Q4 (Output 4)
6. Q5 (Output 5)
7. Q6 (Output 6)
8. Q7 (Output 7)
9. GND (Ground)
10. SER (Serial Data Input)
11. RCLK (Register Clock)
12. SRCLK (Shift Register Clock)
13. OE (Output Enable)
14. MR (Master Reset)
15. SH_CP (Shift Register Clock)
16. VCC (Supply Voltage)

Functional Features

• Serial-in, parallel-out operation allows for easy cascading of multiple shift registers.
• High-speed operation with a maximum clock frequency of 25 MHz.
• CMOS logic ensures low power consumption and compatibility with a wide range of digital systems.
• Output enable (OE) pin allows for easy control of the output stage.
• Master reset (MR) pin resets the shift register to its initial state.

Advantages and Disadvantages

Advantages

• Compact 16-pin SOIC package saves board space.
• High-speed operation enables quick data transfer.
• Low power consumption due to CMOS technology.
• Easy cascading of multiple shift registers for expanding outputs.

Disadvantages

• Limited number of stages (8) may not be sufficient for certain applications requiring more outputs.
• Lack of built-in protection features against voltage spikes or ESD events.

Working Principles

The MM74HC595M is a serial-in, parallel-out shift register. It receives data serially through the SER pin and shifts it into its internal register on each rising edge of the SRCLK (Shift Register Clock) signal. The data can then be transferred to the output stage by toggling the RCLK (Register Clock) signal. The Q0-Q7 outputs reflect the state of the internal register and can drive external devices.

Detailed Application Field Plans

The MM74HC595M can be used in various applications that require expanding the number of outputs from a microcontroller or digital circuit. Some potential application fields include:

1. LED Matrix Displays: The shift register can be used to control multiple LEDs in a matrix arrangement, allowing for dynamic patterns and animations.
2. Seven-Segment Displays: By connecting the outputs of the shift register to a seven-segment display, it becomes possible to drive multiple digits using fewer microcontroller pins.
3. Motor Control: The shift register can be used to control multiple motors or other actuators, enabling precise control over their states.
4. Data Multiplexing: It can be utilized to multiplex data from multiple sources onto a single output line, reducing the number of required connections.

Detailed and Complete Alternative Models

1. 74HC595: This is a similar shift register IC from the same family, offering the same functionality but in a different package (DIP-16).
2. TPIC6B595: This shift register IC provides higher output current capability (150 mA) and built-in protection features, making it suitable for driving high-power loads.
3. CD4094: This IC combines a shift register with latches, allowing for easy control of outputs without the need for an external latch signal.

These alternative models offer similar functionality to the MM74HC595M but may have different package options, additional features, or improved specifications depending on the specific requirements of the application.

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