MM74HC259M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Storage and Control
• Characteristics: High-Speed, 8-Bit Addressable Latch/Shift Register
• Package: DIP (Dual In-line Package)
• Essence: The MM74HC259M is a versatile IC that combines the functionality of an 8-bit latch and a shift register. It can store and control data in various applications.
• Packaging/Quantity: The MM74HC259M is typically sold in reels or tubes, with a quantity of 25 units per reel/tube.

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to +85°C
• Latch Enable Setup Time: 20 ns
• Data Input Setup Time: 20 ns
• Data Output Hold Time: 10 ns
• Maximum Clock Frequency: 33 MHz

Detailed Pin Configuration

The MM74HC259M has a total of 16 pins, which are arranged as follows:

1. GND (Ground)
2. D0 (Data Input 0)
3. D1 (Data Input 1)
4. D2 (Data Input 2)
5. D3 (Data Input 3)
6. D4 (Data Input 4)
7. D5 (Data Input 5)
8. D6 (Data Input 6)
9. D7 (Data Input 7)
10. LE (Latch Enable)
11. CLK (Clock)
12. Q0 (Output 0)
13. Q1 (Output 1)
14. Q2 (Output 2)
15. Q3 (Output 3)
16. VCC (Power Supply)

Functional Features

• The MM74HC259M can operate as an 8-bit latch or a shift register, depending on the control signals applied.
• It has a latch enable input (LE) that allows data to be stored in the internal latches.
• The clock input (CLK) controls the shifting of data through the shift register.
• The outputs (Q0-Q3) provide the stored or shifted data.
• The IC is designed for high-speed operation and can handle frequencies up to 33 MHz.

Advantages and Disadvantages

Advantages: - Versatile functionality as both a latch and a shift register. - High-speed operation. - Wide operating voltage range. - Compact DIP package for easy integration.

Disadvantages: - Limited number of outputs (4 bits). - Requires external control signals for proper operation.

Working Principles

The MM74HC259M operates based on the principles of latch and shift register circuits. When the latch enable (LE) signal is high, the data inputs (D0-D7) are stored in the internal latches. On the rising edge of the clock (CLK) signal, the stored data is shifted through the shift register. The shifted data appears at the outputs (Q0-Q3). The IC can be controlled to function either as a latch or a shift register by manipulating the control signals.

Detailed Application Field Plans

The MM74HC259M finds applications in various fields where data storage and control are required. Some specific application areas include:

1. Digital Communication Systems
2. Data Processing Units
3. Industrial Automation
4. Robotics
5. Automotive Electronics

In digital communication systems, the MM74HC259M can be used for address decoding, data buffering, and control signal generation. In data processing units, it can assist in data manipulation and control logic implementation. In industrial automation and robotics, the IC can be utilized for controlling actuators, sensors, and data acquisition. Automotive electronics can benefit from the MM74HC259M in applications such as dashboard control, lighting systems, and sensor interfacing.

Detailed and Complete Alternative Models

1. 74HC595: 8-Bit Serial-In/Parallel-Out Shift Register
2. CD4015: Dual 4-Stage Static Shift Register
3. SN74LS164: 8-Bit Serial-In/Parallel-Out Shift Register
4. CD4094: 8-Stage Shift-and-Store Bus Register
5. 74HCT164: 8-Bit Serial-In/Parallel-Out Shift Register

These alternative models offer similar functionality to the MM74HC259M and can be used as substitutes depending on specific requirements and availability.

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