74F257ASJ

Series:	74F
Packaging:	Tube
Part Status:	Obsolete
Type:	Multiplexer
Circuit:	4 x 2:1
Independent Circuits:	1
Current - Output High, Low:	3mA, 24mA
Voltage Supply Source:	Single Supply
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	0°C ~ 70°C
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.209", 5.30mm Width)
Supplier Device Package:	16-SOP
Base Part Number:	74F257

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Introduction to 74F257ASJ

74F257ASJ is a 1-of-8 FET multiplexer with a fast logic switch. It has an application field that covers logic signal switching, multiplexing, and decoding, to name just a few. This multiplexer is designed to be used in both bus and buffer applications, and it is designed using CMOS technology for superior speed and low power consumption. The 74F257ASJ is a popular choice for many applications and is found in different boards and systems, including industrial automation and telecommunications.

Features

The 74F257ASJ contains a set of features that make it an excellent choice for a wide variety of applications. One of the most notable features is the fast switching speed. With a propagation delay time of 4 ns, the 74F257ASJ can quickly switch between channels and respond to changing signals. Additionally, the 74F257ASJ can operate at a wide supply voltage range: from 6.0 V to 15 V. This makes the 74F257ASJ suitable for operation in different supply voltages, which can be important in different industrial settings. Another important feature of the 74F257ASJ is its power-down capability. This multiplexer switch can select the high-value channel when the device is in power-down mode. This is an important feature and allows the device to remain in the selected state even when power is off. This capability makes the 74F257ASJ suitable for applications that require preservation of the selected bit state after power-off or reset.

Uses

The 74F257ASJ has multiple uses and is suitable for a wide range of applications. One of the most common uses of the 74F257ASJ is as a logic switch. It can be used to quickly switch between channels and respond to different logic signals. This makes the 74F257ASJ suitable for applications such as buffer amplifier circuits and transmission systems. The 74F257ASJ can also be used in multiplexing applications. The device can select any one of the eight channels inputted by the device and amplify the signal on the output terminal. This makes the 74F257ASJ an ideal choice for applications that require data to be quickly multiplexed between two channels.Another popular use for the 74F257ASJ is in decoding applications. The device can select any one of the eight channels and decode the signal on its output. This makes the 74F257ASJ suitable for applications that require decoding of different signals, such as in digital-to-analog converters and encoding circuits.

Working Principle

The 74F257ASJ is powered by a single supply voltage. A logic-high signal on the chip’s SELECT input enables the FET switch inside the device and selects one of the eight data channels. This is known as the select operation. The selected channel is then amplified and the amplified signal is outputted on the chip’s output terminal.The 74F257ASJ also includes a power-down operation. This operation is triggered by a logic-low signal on the chip’s POWER DOWN input. During this operation, the chip outputs a logic-high signal on its output terminal and selects the high-value channel. This is designed to preserve the selected bit state even when the device is powered down. The 74F257ASJ also contains a number of other features, including pull-up resistors, which help to ensure that the device is in its correct operating state. This device is also designed to operate at different switching speeds; the device can be set to operate at either 4ns, 8ns, 16ns, or 32ns.

Conclusion

The 74F257ASJ is a 1-of-8 FET multiplexer with a fast logic switch. It is designed using CMOS technology and has a wide range of features and capabilities. The 74F257ASJ\'s application field includes logic signal switching, multiplexing, and decoding, and it is suitable for use in both bus and buffer applications. This multiplexer can operate at a wide supply voltage range and has a fast switching speed of 4ns, making it an ideal choice for many applications. Additionally, the 74F257ASJ has the capability to preserve the selected bit state even when power is off, which makes it suitable for applications that require preservation of the selected bit state after power-off or reset.

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