SN74HCT157NG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics:
  • High-speed operation
  • Low power consumption
  • Wide operating voltage range
  • Schmitt-trigger inputs for noise immunity
• Package: DIP-16 (Dual In-line Package with 16 pins)
• Essence: The SN74HCT157NG4 is a quad 2-input multiplexer that selects four bits of data from two sources and outputs the selected data onto a single line.
• Packaging/Quantity: Available in tubes or reels, with 25 pieces per tube/reel.

Specifications

• Supply Voltage Range: 4.5V 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: 13 ns (typical)
• Input Capacitance: 3 pF (typical)
• Output Capacitance: 6 pF (typical)

Pin Configuration

The SN74HCT157NG4 has 16 pins arranged as follows:

+---+--+---+ A1 --|1 +--+ 16|-- VCC B1 --|2 15|-- B2 A2 --|3 14|-- B3 B3 --|4 13|-- B4 A3 --|5 12|-- GND B4 --|6 11|-- Y A4 --|7 10|-- E G1 --|8 9|-- G2 +----------+

Functional Features

• Quad 2-input multiplexer
• Selects four bits of data from two sources (A and B)
• Outputs the selected data onto a single line (Y)
• Enable input (E) controls the operation of the multiplexer
• Output enable input (G1, G2) allows for tri-state output control

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient data selection - Low power consumption helps conserve energy - Wide operating voltage range allows for compatibility with various systems - Schmitt-trigger inputs provide noise immunity, ensuring reliable operation

Disadvantages: - Limited to selecting four bits of data from two sources - Requires external control signals for proper operation

Working Principles

The SN74HCT157NG4 operates as a quad 2-input multiplexer. It selects one of the two input sources (A or B) based on the control signals applied to the select inputs (A1-A4). The selected data is then outputted onto the Y pin. The enable input (E) controls the operation of the multiplexer, while the output enable inputs (G1, G2) allow for tri-state output control.

Detailed Application Field Plans

The SN74HCT157NG4 can be used in various applications, including: - Data routing and selection in digital systems - Address decoding in memory systems - Input/output expansion in microcontrollers - Signal switching in communication systems

Alternative Models

Some alternative models that can be considered as replacements for the SN74HCT157NG4 include: - CD74HC157E - MC74HCT157AN - 74HCT157D

These models offer similar functionality and characteristics, providing flexibility in choosing the most suitable option for specific applications.

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