SN74AHCT157NSR

Series:	74AHCT
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Multiplexer
Circuit:	4 x 2:1
Independent Circuits:	1
Current - Output High, Low:	8mA, 8mA
Voltage Supply Source:	Single Supply
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.209", 5.30mm Width)
Supplier Device Package:	16-SO
Base Part Number:	74AHCT157

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The SN74AHCT157NSR is a member of the Texas Instruments SN74AHCT family of logic signal switches, multiplexers, and decoders. These devices provide the functions of a high-speed dual analog multiplexer/demultiplexer, data selector/multiplexers, and decoders. SN74AHCT157NSR is a silicon-gate CMOS device optimized for double data rate applications and is based on the standard CMOS analog switching logic (AS.)The SN74AHCT157NSR features a wide range of applications and includes two select inputs, two active-low enable inputs, and two output enable (OE) inputs. It is able to multiplex or demultiplex signals at single or double data transfer rates, and can accommodate a wide range of voltages and operating conditions. Additionally, the SN74AHCT157NSR offers high immunity to interference and EMI, high speed performance, open collector capability, and low power consumption.The SN74AHCT157NSR has two high-speed input-signal analog switches, two control inputs, and two output enable pins. When the data is clocked into the device, the control inputs select which input signal is output to the data output pin. If the enable input (EN) pin is high, then the output is enabled, otherwise it remains off. The output of the selected input is also routed to the output enable pin so that the output can be disabled from that point, if desired.The working principle of the SN74AHCT157NSR is based on the AS logic family. This logic family is based on the basic principles of CMOS technology which involves the use of insulated-gate field-effect transistors (IGFETs) and electrode capacitance. The basic operation of AS logic is as follows: when the input voltage (Vin) is greater than the threshold voltage of the switching device (Vth), the logic switch is turned on, allowing current to flow from the power source. This logic family works with simple logic gates such as AND, OR, and NOT, which allow it to select and enable the desired signal.In summary, the SN74AHCT157NSR is a member of the Texas Instruments SN74AHCT family of logic signal switches, multiplexers, and decoders. It is designed for double data rate applications, and provides high speed performance, high immunity to interference and EMI, open collector capability, and low power consumption. The device is based on the CMOS analog switching (AS) logic family, which is based on the use of IGFETs and electrode capacitance. The SN74AHCT157NSR offers flexibility and scalability for a wide range of applications in double data rate applications.

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