SN74LS253DG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Multiplexer/Demultiplexer
• Characteristics: Dual 4-Line to 1-Line Data Selectors/Multiplexers
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Logic Gates and Flip-Flops
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Logic Family: LS-TTL (Low Power Schottky Transistor-Transistor Logic)
• Number of Inputs: 8 (4 inputs per multiplexer)
• Number of Outputs: 2 (1 output per multiplexer)
• Supply Voltage: 4.75V to 5.25V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 15ns (typical)
• Output Current: ±8mA
• Input Capacitance: 3pF (typical)

Detailed Pin Configuration

The SN74LS253DG4 has a total of 16 pins, which are assigned as follows:

1. A1: Input A for the first multiplexer
2. B1: Input B for the first multiplexer
3. C1: Input C for the first multiplexer
4. D1: Input D for the first multiplexer
5. GND: Ground (0V reference)
6. Y1: Output Y for the first multiplexer
7. Y2: Output Y for the second multiplexer
8. VCC: Positive supply voltage (+5V)
9. A2: Input A for the second multiplexer
10. B2: Input B for the second multiplexer
11. C2: Input C for the second multiplexer
12. D2: Input D for the second multiplexer
13. S1: Select input for the first multiplexer
14. S2: Select input for the second multiplexer
15. GND: Ground (0V reference)
16. VCC: Positive supply voltage (+5V)

Functional Features

• Dual 4-line to 1-line data selectors/multiplexers in a single IC package
• Allows selection between two sets of four inputs using the select inputs (S1 and S2)
• Each multiplexer can be used independently or in combination
• Low power consumption due to LS-TTL technology
• High-speed operation with low propagation delay time
• Wide operating temperature range for versatile applications

Advantages and Disadvantages

Advantages: - Compact and integrated design saves board space - Versatile functionality with dual multiplexers - Low power consumption - High-speed operation

Disadvantages: - Limited number of inputs and outputs per multiplexer - Requires external components for complete circuit implementation

Working Principles

The SN74LS253DG4 is based on LS-TTL technology, which utilizes logic gates and flip-flops to implement the multiplexer/demultiplexer functionality. The select inputs (S1 and S2) determine which set of four inputs is connected to the output. The internal circuitry switches the selected input to the output based on the input signals and the select inputs.

Detailed Application Field Plans

The SN74LS253DG4 is commonly used in various digital systems and applications, including:

1. Data routing and selection in microcontrollers and microprocessors
2. Address decoding in memory systems
3. Signal switching in communication systems
4. Control signal generation in industrial automation
5. Multiplexing/demultiplexing in data acquisition systems

Detailed and Complete Alternative Models

1. SN74LS151: 8-Line to 1-Line Data Selectors/Multiplexers
2. SN74LS157: Quad 2-Line to 1-Line Data Selectors/Multiplexers
3. SN74LS257: Quad 2-Line to 1-Line Data Selectors/Multiplexers with 3-State Outputs
4. SN74LS352: Dual 4-Line to 1-Line Data Selectors/Multiplexers with 3-State Outputs

These alternative models provide similar functionality and can be used as substitutes for the SN74LS253DG4 in various applications.

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