SN74LVC240APWG4

Series:	74LVC
Packaging:	Tube
Part Status:	Active
Logic Type:	Buffer, Inverting
Number of Elements:	2
Number of Bits per Element:	4
Input Type:	--
Output Type:	3-State
Current - Output High, Low:	24mA, 24mA
Voltage - Supply:	1.65 V ~ 3.6 V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	20-TSSOP
Base Part Number:	74LVC240

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Introduction

The SN74LVC240APWG4 or “SN74LVC240A” is an advanced transmission gate logic buffer from the Texas Instruments (TI). It operates from a wide single supply voltage range and is intended for very low power and low voltage applications, particularly in mobile and other industry space-constricted environments. It has four 2-channel non-inverting buffers and is an important component in general purpose high speed signal transmission. This device is particularly effective in space constricted environments as it is designed in a very low power and low voltage layout using a single supply voltage.

Application Field

The SN74LVC240A has a wide range of uses mainly due to its low power, low voltage, and wide single supply voltage range. This makes it ideal for applications in mobile devices such as smartphones and tablets, industrial automation and control, automobiles, and limited space computers. As an example, it can be used as a level shifter to convert a logic input signal of one voltage to another voltage. It can also be used to convert a logic signal from a low voltage to a CMOS logic level, and vice versa. Additionally, it can be used as an interface between memory and logic gates which have different voltage levels, as well as for implementing high speed signal transmission in low power and low voltage applications.

Working Principle

The SN74LVC240A buffers, also known as transmission gates, are a type of logic-level gate that can transmit a signal from one point to another. A transmission gate is essentially two switches (transistors) in series and it operates on the same principle as a logic-level transistor. When the gate voltage is at 0V, the gate is turned off and the signal passes through the channels, the output terminal is set to a logic ‘1’. When the gate voltage is at Vcc, the gate is turned on and the signal is blocked, the output terminal is set to a logic ‘0’. The SN74LVC240A is designed to operate with a Vcc of anywhere between 0V to 7V and has two input pins: one to provide the logic signal and one to provide the gate voltage (Vcc). The two transistors that make up the transmission gate are controlled by the gate voltage, the logic signal passes through the channels and is not affected by the output voltage. The SN74LVC240A is also capable of dissipating power up to a maximum of 1000 mW, depending on temperature and other environmental conditions.

Conclusion

In conclusion, the SN74LVC240APWG4 is a very effective and reliable transmission gate logic buffer for low power and low voltage applications. Its wide range single power supply voltage, high speed logic buffer, and low power dissipation makes it ideal for a range of applications in mobile, industrial, and automotive electronic devices. Its two channel non-inverting buffers make it capable of transmitting a signal between two points without making any changes to the signal, making it even more useful for applications with less space available.

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