74ACT158SJX

Series:	74ACT
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Multiplexer
Circuit:	4 x 2:1
Independent Circuits:	1
Current - Output High, Low:	24mA, 24mA
Voltage Supply Source:	Single Supply
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Through Hole
Package / Case:	16-DIP (0.300", 7.62mm)
Supplier Device Package:	16-DIP
Base Part Number:	74ACT158

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Introduction

The 74ACT158SJX is an integrated circuit from Texas Instruments and is part of the family of Logic-Signal Switches, Multiplexers, and Decoders. This product has a wide range of applications, including interface, buffering, data transfer, memory, logic, and communication functions. The 74ACT158SJX is a Symmetrical Quad 2-Input Multiplexer/Demultiplexer. It offers high speed performance and various features, along as a wide range of industrial and commercial applications.

Features

The 74ACT158SJX features a wide range of features, including: • Low quiescent power dissipation • Low propagation delay • High speed • Small package size • Pin compatible with the popular 74ACT154 • Improved drive characteristics • Schmitt trigger inputs • Non-inverting outputs • Guaranteed noise margin • Simultaneous switching is not allowed • Multiplexing and demultiplexing

Applications

The 74ACT158SJX can be used in a variety of applications, including:• Multi-channel data transfers • Automotive systems • Digital/analog signal processing • Industrial systems • Medical imaging systems• High-speed interface logic• Communications • Test and measurement • Data acquisition systems • Video and audio switching

Working Principle

The 74ACT158SJX is a high-speed symmetrical Quad 2-Input Multiplexer/Demultiplexer. It has four data select inputs (S0, S1, S2, and S3), two data inputs (D0 and D1), two control inputs (C1 and C2), and four enable inputs (E0, E1, E2, and E3). The enable inputs are active-low. The 74ACT158SJX multiplexer/demultiplexer has two independent multiplexer sections, each consisting of two 2-input multiplexers. Each 2-input multiplexer section has two data inputs (D0 and D1), one select input (S0 or S1), and one output (Z0 or Z1). By applying the appropriate logic levels to the select inputs (S0 and S1), either input can be selected and applied to the corresponding output. The 74ACT158SJX demultiplexer has two independent demultiplexer sections, each consisting of two 2-input demultiplexers. Each 2-input demultiplexer section has one data input (D0 or D1), two select inputs (S2 and S3), and four outputs (Z0, Z1, Z2, and Z3). By applying the appropriate logic levels to the select inputs (S2 and S3), either input can be selected and applied to the corresponding output. The 74ACT158SJX is also equipped with two control inputs, C1 and C2. The C1 input controls multiplexing and demultiplexing operation of the device. When C1 is high, the multiplexer operation is enabled, while the demultiplexer operation is disabled. When C1 is low, the demultiplexer operation is enabled, while the multiplexer operation is disabled. The C2 input is used to select either byte or bit-switch mode. In byte mode, all the outputs will switch synchronously with the appropriate logic levels applied to the select inputs (S2 and S3). In bit-switch mode, all the outputs will switch asynchronously with the appropriate logic level applied to the select inputs (S2 and S3).

Conclusion

In conclusion, the 74ACT158SJX is a high-speed Symmetrical Quad 2-Input Multiplexer/Demultiplexer and part of the family of Logic-Signal Switches, Multiplexers, and Decoders. It has a wide range of applications in industrial and commercial systems, and various features such as low quiescent power dissipation, low propagation delay, high speed, small package size, and pin compatibility. The 74ACT158SJX is equipped with two control inputs, C1 and C2, which can be used to select the multiplexer or demultiplexer mode, and select either byte or bit-switch mode.

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