74ALVC125D,118

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74ALVC125D,118 Application Field and Working Principle

The 74ALVC125D,118 is a low voltage version of the 74ALVC125 high speed quad buffer that belongs to the “Logic - Buffers, Drivers, Receivers and Transceivers” category. It is designed for low power and low voltage operation, with operating voltage ranges from 1.65V up to 3.6V. It has low noise immunity and low power consumption, and is suitable for applications like bus switches, bus drivers, and clock components.

Features

• Low voltage operation (1.65V to 3.6V).
• High-speed operation with tpd up to 6ns.
• Low noise from narrow pulse widths.
• Low power dissipation.
• Latch-up free.
• Pin-for-pin compatible with the 74ALVC125.

Application Fields

The 74ALVC125D,118 is mainly used in applications like buses switches, bus drivers, clock components, peripheral and memory interface logic, MCU chip selection and more. It can be used in networking, telephone exchange and network processors, Embedded Logic and Video circuits, Audio and Voice interfaces, Automotive applications and consumer electronic products.

Working Principle

The 74ALVC125D,118 is a high-speed quad buffer, meaning that it can read data from an input line and then transfer it to an output line, performing the function of input isolation. This integrated circuit has four independent buffered inputs, each one of them having an open- drain active low output. Each circuit features a tristate output buffer and a common input enable pin. The inputs are TTL/CMOS compatible, giving them the capacity to drive a variety of logic families, including TTL, GTL, and COS-MOS. The high-speed input capability ensures that the outputs are set correctly even at high frequencies, making it suitable for multiple data-bus applications.The input enable pin (E) is active high and can be driven by both CMOS and TTL logic. When E is low, the output is disabled, thereby isolating the input from the output line. When E is high, the output is enabled, and all buffers read the same input data. When the input data is changed and E is in an active state, the input data is latched on the rising edge of the clock, and the output is updated accordingly.

Conclusion

The 74ALVC125D,118 is a great logic device for multiple applications in networking, telecommunications, consumer electronics, automotive, and embedded logic. It features a high-speed operation, low noise, low power dissipation and is suitable for use in bus switches, bus drivers, clock components and more. The tristate output buffers and open-drain active low outputs, make this device the ideal choice for these applications.

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