MC74HC259ADTG

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Storage and Control
• Characteristics: High-Speed, 8-Bit Addressable Latch/Shift Register
• Package: SOIC-16
• Essence: The MC74HC259ADTG is a versatile integrated circuit that combines the functionality of an 8-bit addressable latch and a shift register. It is designed to provide efficient data storage and control capabilities in various applications.
• Packaging/Quantity: The MC74HC259ADTG is available in a standard SOIC-16 package and is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to +85°C
• Latch Enable Setup Time: 20 ns (maximum)
• Data Input Setup Time: 20 ns (maximum)
• Data Output Hold Time: 0 ns (minimum)
• Clock Pulse Width: 30 ns (minimum)

Detailed Pin Configuration

The MC74HC259ADTG has a total of 16 pins, each serving a specific function:

1. GND: Ground
2. QA: Output A
3. QB: Output B
4. QC: Output C
5. QD: Output D
6. QE: Output E
7. QF: Output F
8. QG: Output G
9. QH: Output H
10. MR: Master Reset
11. SH/LD: Shift/Load Control
12. CLK: Clock Input
13. A: Address Input A
14. B: Address Input B
15. C: Address Input C
16. VCC: Supply Voltage

Functional Features

• Addressable Latch: The MC74HC259ADTG can store data at each of its eight outputs independently, based on the address inputs provided.
• Shift Register: It can also perform serial shifting of data from one output to another, allowing for sequential data transfer.
• Master Reset: The master reset input (MR) allows for clearing all outputs simultaneously.
• Shift/Load Control: The shift/load control input (SH/LD) determines whether the device operates in latch or shift mode.

Advantages and Disadvantages

Advantages: - Versatile functionality combining latch and shift register capabilities - High-speed operation - Wide supply voltage range - Compact SOIC-16 package for space-constrained applications

Disadvantages: - Limited number of addressable outputs (8) - Requires external clock signal for proper operation

Working Principles

The MC74HC259ADTG operates based on the principles of digital logic. When the shift/load control input is set to "load" mode, the data present at the address inputs is latched and stored at the corresponding outputs. In "shift" mode, the data is shifted from one output to the next upon each clock pulse, allowing for sequential data transfer.

Detailed Application Field Plans

The MC74HC259ADTG finds application in various fields where efficient data storage and control are required. Some potential application areas include:

1. Digital Communication Systems: Used for address decoding and data routing in communication protocols.
2. Industrial Automation: Enables control and monitoring of multiple devices through addressable outputs.
3. Automotive Electronics: Facilitates data management and control in automotive systems such as dashboard displays and lighting controls.
4. Consumer Electronics: Integrated into devices like gaming consoles and home automation systems for data processing and control.

Detailed and Complete Alternative Models

1. 74HC595: Similar functionality with a higher number of addressable outputs (16).
2. CD4015: Dual 4-bit static shift register with latch functionality.
3. SN74LS373: Octal transparent latch with 3-state outputs.

These alternative models offer similar features and can be considered based on specific application requirements.

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