SN74F257NSR

Series:	74F
Packaging:	Tape & Reel (TR)
Part Status:	Active
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-SO
Base Part Number:	74F257

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Introduction

The SN74F257NSR is a logic-signal switch, multiplexer, and decoder integrated circuit (IC) operating from a 5 V to a 15 V supply voltage range and implemented on a PMOS technology. The SN74F257NSR is capable of handling both digital input and analog input over a wide range of voltage levels. The SN74F257NSR has two different features. First, it is capable of multiplexing 16 different digital signals onto one output. Second, it can also be used as a 4-bit logic function decoder. This IC is designed to provide a cost effective solution in logic applications such as cost-sensitive, high-speed, or density concerns. In terms of output characteristics, the SN74F257NSR is able to switch and process signals at switching speeds of 1 us and faster.

Application field and working principle

The SN74F257NSR is most commonly used in applications such as interfacing and clocking, voltage level shifting, data multiplexing, and logic function decoding. In terms of its working principle, this IC is a 4-bit logic function decoder that is capable of decoding 2-bit binary codes (4-bit data lines) into one of 16 predetermined output lines. The outputs are actuated when the outputs are enabled using the additional enable line.

Interfacing and Clocking Applications

This IC is capable of interfacing and clocking applications and can be used to control a 4-bit parallel data bus in order to transfer data between devices. The SN74F257NSR takes the data from the bus and decodes it into the desired output line. This device can also be used as a frequency divider in order to divide the incoming clock frequency by a predetermined number.

Voltage Level Shifting Applications

The SN74F257NSR can also be used in applications that require voltage level shifting. This device is capable of converting a logic signal of a certain voltage to a logic signal of a different voltage. For example, it can be used to convert a 5 V logic signal to a 15 V logic signal.

Data Multiplexing Applications

The SN74F257NSR is also capable of data multiplexing. This device is able to take up to 16 different digital inputs and multiplex them into one output line. This can be useful in applications that require the combination of several low speed signals into one line in order to increase the overall speed.

Logic Function Decoding Applications

This IC can be used in logic function decoding applications to decode logic functions such as Boolean logic operations. It is also capable of decoding 2-bit binary codes (4-bit data lines) into one of 16 predetermined output lines. The outputs are actuated when the outputs are enabled using the additional enable line.

Conclusion

The SN74F257NSR is a versatile integrated circuit that is capable of performing many different tasks. It can be used in a variety of applications such as interfacing and clocking, voltage level shifting, data multiplexing, and logic function decoding. This IC is designed to be an affordable solution for cost-sensitive, high-speed, or density applications.

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