SN74F157ANSR

Series:	74F
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Multiplexer
Circuit:	4 x 2:1
Independent Circuits:	1
Current - Output High, Low:	1mA, 20mA
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:	74F157

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SN74F157ANSR Application Field and Working PrincipleSN74F157ANSR is a 4-bit, 2-of-4 line data selector/multiplexer with internal knock-out switch terminals. This device is designed to operate from a single 5V supply. It is constructed with Schottky-clamped transistors as level-triggered flip-flops for data retention and logic implementations. The 2-of-4 functions allow data to be selected from one of four sources.Logic - Signal Switches, Multiplexers, DecodersThe SN74F157ANSR provides the user with a complete 4-bit multiplexer/data selector in a single package. The device is capable of selecting one of four data inputs and transmitting that data via output logic depending upon the logic state of the two select inputs. With its input levels based on Schottky-Clamped Transistors, this device can operate in both CMOS and TTL environments.The SN74F157ANSR consists of four 2-input multiplexers which use standard logic gates to implement the desired switching and logic functions. The four multiplexers are internally connected to form a 4-bit multiplexer/data selector with a single input and a single output. When the select inputs (S0, S1) are at the logic state of "LOW", the Data1 (D1) is transmitted to the output (Y). When the select inputs are at the logic state of "HIGH", the Data2 (D2) is transmitted to the output (Y). The output connections are provided for both inverted and non-inverted inputs making this device ideal for a variety of logic and multiplexer implementations.One of the most common uses of the SN74F157ANSR device is as a data selector. By routing the data input signals to the appropriate inputs of the SN74F157ANSR and driving the select inputs with the control signals, the user can select between two data inputs and output the desired data. This is a very useful feature for applications requiring the selection of data from multiple sources.An example application of the SN74F157ANSR is for a 4 bit register. By connecting 4 bits of data input to the Data1 inputs and the desired register value to the Data2 inputs and routing the output to the register flip-flops, the user can quickly write any value to the register and reset it back to the same value on the next cycle.In addition to a data selector, the SN74F157ANSR can be used as a multiplexer. By connecting Data1 as one of the inputs to the multiplexer (Input 1, 2, 3, or 4) and Data2 as the other input (Input 4, 5, 6, or 7) and routing the output of the SN74F157ANSR to the output of the multiplexer, the user can quickly implement a 4-to-1 multiplexer.In summary, the SN74F157ANSR is a high-speed, low-power, single-package logic device designed for use in a variety of logic and multiplexer applications. With its single 5V supply and internal knock-out switch terminals, the SN74F157ANSR is an ideal device for any application requiring a 4-bit multiplexer or data selector.

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