74AUP2G125GD,125

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Logic Buffers, Drivers, Receivers, Transceivers encompasses a wide range of integrated circuits (ICs) that are specifically designed for data, control and signal transfer applications. The operational goal for these ICs is to maintain, amplify, transmit or receive digital logic levels and provide data isolation between logic interfacing. 74AUP2G125GD is a multi-function buffer transistor from Texas Instruments that can be used as a buffer, driver, receiver, or transceiver.

Application Field of 74AUP2G125GD

The 74AUP2G125GD is a low voltage, low power 5.5V, 1.8 V and 0.7~1.15V dual output level shifter and can be used as an interface between 1.8V and 0.7~1.15V logic, like commonly used in mobile batteries, portable devices, and industrial control systems. It satisfies the power requirements of 2-5.5V, or a single 2.5–5.5V supply operation, and its output controls TTL, LVCMOS or similar logic families. It also works perfectly with either 2.5V or 3.3V logic operations. It is designed to handle the high frequency logic levels of the 2.5 - 5.5V range, allowing it to handle fast frequencies up to 25 MHz.

The 74AUP2G125GD provides an insulated output in terms of voltage and current, thus it prevents short circuits between outputs and also helps in maintaining the low power level. It also offers many protection features to eliminate significant human errors such as short circuit, Current Limit and Thermal Shut Down fields. Other application areas for this level shifter are Set-Top Box applications, data switch applications and driving logic levels on LCDs, pincussion type LCDs (CLCD), etc.

Working Principle of 74AUP2G125GD

The operational principle behind the 74AUP2G125GD is to provide both isolation and amplification of digital signals. It connects two different voltage levels, thus providing isolation between the interface and the signal. As signal propagates, the amplitude decreases due to processing, or sometimes the signal needs to be amplified. This is where level shifter comes into play. 74AUP2G125GD Functions as a NPN Transistor to shift the logic level from 2.5V to 5.5V or A to B logic level conversion with minimum power dissipation.

The inputs of 74AUP2G125GD are E1 (pad 0.7 V to 1.15 V) and E2 (pad 1.8 V). The output is EN (pad 5.5 V) which typically through a high current PFET transistor switch. This NPN transistor switch is constantly supplied with the supply voltage and the base voltage is fully saturated by the positive voltage of the E1 input signal. The collector voltage (Vc) of the NPN transistor is determined by the RDS(on) characteristic of the transistor and the value of the applied base voltage. In the case of the 74AUP2G125GD, the output signal is higher than 2.5V, but lower than 5.5V. Thus, it provides the user both isolation and amplification of the signal.

Conclusion

The 74AUP2G125GD is a low voltage, low power 5.5V, 1.8 V and 0.7~1.15V dual output level shifter. It provides both level shift and signal amplification and is suitable for connecting two different voltage level interfaces. This device has uses in several different applications, including data switch applications and driving logic levels on LCDs, pincussion type LCDs (CLCDs), etc. It is capable of handling fast frequencies, up to 25 MHz, which is a great feature for high-speed data transmissions.

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