74LVC2G3157DPJ

Switch Time (Ton, Toff) (Max):	5.7ns, 3.8ns
Supplier Device Package:	10-TSSOP
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Operating Temperature:	-40°C ~ 125°C (TA)
Crosstalk:	-54dB @ 10MHz
Current - Leakage (IS(off)) (Max):	5µA
Channel Capacitance (CS(off), CD(off)):	6pF
Charge Injection:	7.5pC
-3db Bandwidth:	--
Series:	74LVC
Voltage - Supply, Dual (V±):	--
Voltage - Supply, Single (V+):	1.65 V ~ 5.5 V
Channel-to-Channel Matching (ΔRon):	--
On-State Resistance (Max):	15 Ohm
Number of Circuits:	2
Multiplexer/Demultiplexer Circuit:	2:1
Switch Circuit:	SPDT
Part Status:	Active

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Introduction

The 74LVC2G3157DPJ is a dual 2:1 multiplexer/demultiplexer that is available in a 6-pin SOT25 package. It is used to route two types of signals on a common bus by sharing a single line in multiplexed form. When compared to existing switches, it provides outstanding resistance to overvoltage and power supply glitches, making it ideal for applications requiring a wide range of input supply levels.

Application Field

The 74LVC2G3157DPJ is mainly used for applications that require routing two different types of signals on a common bus. The high-speed logic multiplexing and demultiplexing features increase the slew rate and propagation delay times to reduce the transition times of other signals routed on the bus. This device can be used in interfaces between chips that allow data to be shared from either port.The 74LVC2G3157DPJ is also used in various types of analog and mixed signal applications. It can be used for low voltage level shifting, isolation and buffer-level splitting, as well as sample and hold systems. It is also used in communication systems, where it is used as a multiplexer/demultiplexer for routing variable telephone signals.

Working Principle

The 74LVC2G3157DPJ works by using a common bus and data switching signals to route two different types of signals on the bus. The device is composed of two channels, each with a multiplexer/demultiplexer. The multiplexer sections consist of three pins; an input selection pin that selects between two inputs, a D2 pin for one of the two data inputs and a D1 pin for the second data input. The demultiplexer sections consist of two pins; a D pin for the data input and a selection pin that selects the output.When the input selection pin of the multiplexer/demultiplexer is high, data from D2 is selected for the output. When the input selection pin is low, data from D1 is selected for the output. The data input for the demultiplexer section is routed through the D pin and the selection pin will then route the output to the appropriate output port, according to the logic level of the selection pin.The 74LVC2G3157DPJ is designed to switch between levels of 1.5V to 4.5V, making it compatible with most low-voltage applications. It also has an input voltage range of 7V, so it can withstand overvoltages up to 20V and fast transient inputs up to 11V.

Conclusion

The 74LVC2G3157DPJ is an ideal choice for applications that require fast logic switching between two different types of signals on a common bus. It is capable of withstanding overvoltages and power supply glitches and has a wide input voltage range. The device is versatile, allowing it to be used in analog and mixed signal applications. Its fast switching capability makes it well suited for use in communication systems and sample and hold systems.

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