SN74AHCT157DBR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Multiplexer
• Characteristics: High-speed, low-power, 4-channel multiplexer
• Package: SSOP-16
• Essence: Logic gate-based multiplexer
• 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: 6 ns (typical)
• Maximum Quiescent Current: 1 µA
• Maximum Output Current: ±8 mA

Detailed Pin Configuration

The SN74AHCT157DBR has a total of 16 pins arranged as follows:

__ __ A1 |1 `--' 16| VCC B1 |2 15| Y1 A2 |3 14| B2 B2 |4 13| A3 Y2 |5 SN 12| B3 GND |6 74 11| A4 Y3 |7 AH 10| B4 A3 |8 CT 9| Y4 ``____''

Functional Features

• The SN74AHCT157DBR is a 4-channel multiplexer that allows the selection of one out of four input signals.
• It operates at high speed while consuming low power, making it suitable for applications where both speed and power efficiency are important.
• The device can handle a wide range of supply voltages, from 2V to 5.5V, providing flexibility in various circuit designs.
• It has a low quiescent current of only 1 µA, minimizing power consumption when not actively selecting inputs.
• The multiplexer has a propagation delay time of 6 ns (typical), ensuring fast and accurate signal selection.

Advantages and Disadvantages

Advantages: - High-speed operation - Low-power consumption - Wide supply voltage range - Small package size - Easy integration into various circuit designs

Disadvantages: - Limited to 4-channel selection - Propagation delay may affect timing-sensitive applications

Working Principles

The SN74AHCT157DBR is based on logic gates that perform the multiplexing function. It uses the input control signals (A1, A2, A3, A4) to select one of the four input signals (B1, B2, B3, B4) and routes it to the corresponding output (Y1, Y2, Y3, Y4). The selection is determined by the binary combination of the control signals.

Detailed Application Field Plans

The SN74AHCT157DBR can be used in various applications, including but not limited to:

1. Data Multiplexing: Selecting between multiple data sources for processing or transmission.
2. Address Decoding: Choosing specific memory locations or peripheral devices based on address inputs.
3. Signal Routing: Directing signals to different paths based on control signals.
4. Logic Function Implementation: Combining multiple input signals to generate complex logic functions.

Detailed and Complete Alternative Models

1. CD74HC157E: Similar 4-channel multiplexer with comparable specifications and pin configuration.
2. MC74HCT157AN: Another 4-channel multiplexer offering similar functionality and performance.
3. 74ACT157SCX: Advanced CMOS technology-based multiplexer with improved speed and power characteristics.

These alternative models can be considered based on specific requirements and availability.

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