SN74AHC157D

Product Overview

• Category: Integrated Circuit (IC)
• Use: Multiplexer
• Characteristics: High-speed, low-power, 4-to-1 data selector/multiplexer
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Digital logic IC used for data selection and multiplexing
• 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)
• Input Capacitance: 3.5 pF (typical)
• Output Capacitance: 8 pF (typical)

Pin Configuration

The SN74AHC157D has a total of 16 pins arranged as follows:

__ __ A1 |1 `--' 16| VCC B1 |2 15| B2 A2 |3 14| C2 C1 |4 SN 13| D2 OE1 |5 74 12| OE2 GND |6 AHC 11| GND D1 |7 157 10| D3 C3 |8 9| B3 ``____''

Functional Features

• 4-to-1 data selector/multiplexer with common select inputs (S0, S1)
• Low power consumption
• High-speed operation
• Schmitt-trigger inputs for noise immunity
• Output drive capability: ±24 mA at 3.3V
• ESD protection exceeds JESD 22

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data selection and multiplexing. - Low power consumption makes it suitable for battery-powered devices. - Schmitt-trigger inputs provide noise immunity, ensuring reliable operation.

Disadvantages: - Limited to 4-to-1 data selection/multiplexing, may not be suitable for applications requiring higher input/output count. - Requires external components for voltage regulation and decoupling.

Working Principles

The SN74AHC157D is a digital logic IC that functions as a 4-to-1 data selector/multiplexer. It selects one of the four input data lines (D1-D4) based on the select inputs (S0, S1). The selected data is then routed to the output line (Y). The IC operates on a supply voltage range of 2V to 5.5V and provides high-speed operation with low power consumption.

Detailed Application Field Plans

The SN74AHC157D can be used in various applications, including but not limited to: - Data routing and selection in microcontrollers and digital systems - Address decoding in memory systems - Signal multiplexing in communication systems - Input/output expansion in embedded systems

Detailed and Complete Alternative Models

Some alternative models to SN74AHC157D that serve similar functions include: - CD74HC157E by Texas Instruments - MC74HC157AN by ON Semiconductor - 74HCT157 by NXP Semiconductors - 74LS157 by Fairchild Semiconductor

These alternative models offer similar functionality and can be used as replacements depending on specific requirements and availability.

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