SN74AHC1G125DBVT

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SN74AHC1G125DBVT is a low-voltage single-pole single-throw (SPST) analog switch with a compact size and fast switching speed. The SN74AHC1G125DBVT is designed to function as a general-purpose digital signal switch or other select-switch in a wide variety of digital, analog and mixed-signal applications/systems. This low-voltage switch is designed for use in applications that require bandwidth up to 5 GHz.

The SN74AHC1G125DBVT is part of the AHC logic family from Texas Instruments (TI). This high-speed, low-power logic device is used in various logic/electromechanical applications including logic buffering and multiplexing. It features low operating voltage of 2.3–3.6 V and low capacitance of 0.2 pF in the OFF state. The high-performance switch is designed with solid-state construction, low on-state resistance and low input/output capacitance, making it ideal for switching applications in communications, networking and computing systems.

The SN74AHC1G125DBVT is a logic buffer/driver, receiver, transceiver as well as logic-level converter IC. It is packaged in a 2 mm x 3 mm in dimension dual flat no-lead (DFN) package. The SN74AHC1G125DBVT is used for selecting a wide range of signals from 0.4 V to 3.6 V and for level translation (i.e., changing the voltage of a digital signal from one voltage level to another).

SN74AHC1G125DBVT application fields include: optical systems, data communications, serial-high-speed networks, digital audio systems, instrumentation, automotive, and consumer electronics. This digital switch IC is used for level translation and signal switching where dynamic characteristics, low on-state resistance (Ron) and low total capacitance (package included) are critical performance and operational requirements.

The working principle of SN74AHC1G125DBVT is based on the output impedance of the selected logic level. The input impedance (Rin) of the device is equal to Rswitch when the switch is ON, otherwise Rin is equal to the Tribble\'s Inverse, which is equal to the leakage resistance (Ron) or the resistance of the open gate. The input impedance is then determined by the resistance of the selected logic level, which is either open, or 1/4 of the inverse of the ON resistance (Ron), depending on the voltage level (Vin).

When the input voltage level of SN74AHC1G125DBVT is greater than the selected logic level, the switch is ON and the input impedance is equal to the resistance of the selected logic level. When the input voltage is less than the selected logic level, the switch is OFF and the input impedance is the Tribble\'s Inverse.

The output impedance is the open gate resistance, Ron. When the gate is open, the output impedance is equal to that of Ron. When the gate is closed, the output impedance is equal to the resistance of the selected logic level.

In conclusion, SN74AHC1G125DBVT is a low-voltage single-pole single-throw (SPST) analog switch suitable for level translation and signal switching in digital, analog and mixed-signal applications. It can be used as a digital signal switch or other select-switch in a wide range of applications. Furthermore, it is useful for logic buffering, multiplexing, and level translation.

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