SN74AHCT157DR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics: High-speed, CMOS logic, 4-bit multiplexer
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Logic gate array with multiple inputs and outputs
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6ns (typical)
• Maximum Quiescent Current: 1µA
• Maximum Output Current: ±8mA

Detailed Pin Configuration

The SN74AHCT157DR has a total of 16 pins, which are assigned as follows:

1. A Input 1
2. B Input 2
3. C Input 3
4. D Input 4
5. GND (Ground)
6. Y Output
7. E Enable Input
8. F Output Enable Input
9. Y Output
10. GND (Ground)
11. D Input 4
12. C Input 3
13. B Input 2
14. A Input 1
15. VCC (Supply Voltage)
16. NC (No Connection)

Functional Features

• 4-bit data selector/multiplexer
• Selects one of the four input lines based on the control inputs
• Enables efficient data routing in digital systems
• Low power consumption due to CMOS technology
• High-speed operation for quick data processing

Advantages and Disadvantages

Advantages: - Versatile multiplexing capability - Low power consumption - High-speed operation - Wide supply voltage range

Disadvantages: - Limited number of input and output lines - Requires external control signals for proper functioning

Working Principles

The SN74AHCT157DR is a 4-bit multiplexer that selects one of the four input lines based on the control inputs. The A, B, C, and D inputs represent the data inputs, while the E and F inputs control the selection process. When the enable input (E) is high, the multiplexer is enabled, and the selected input is routed to the output (Y). The output enable input (F) determines whether the output is active or in a high-impedance state.

Detailed Application Field Plans

The SN74AHCT157DR can be used in various applications, including:

1. Data routing in microprocessors and digital systems
2. Address decoding in memory systems
3. Input/output (I/O) expansion in embedded systems
4. Multiplexing multiple data sources in communication systems
5. Logic circuit design and prototyping

Detailed and Complete Alternative Models

1. CD74HC157E: Similar 4-bit multiplexer with slightly different specifications
2. MC74ACT157N: 4-bit multiplexer with similar functionality and package type
3. 74HCT157: 4-bit multiplexer with TTL compatibility and higher operating temperature range

These alternative models offer similar functionality and can be used as replacements for the SN74AHCT157DR in various applications.

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