74LVC1G125GF,132

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The 74LVC1G125GF,132 is a synchronous single directional 1-bit buffer, capable of driving 10 LS-TTL loads. It has a single-hinged inverter design, allowing faster buffering of single-ended inputs and outputs. The 74LVC1G125GF,132 is part of a family of logic-level, logic-buffers, drivers, receivers, and transceivers.

Internals and Design Aspects

The 74LVC1G125GF,132 has an open-drain output stage and an E/D with pull-up resistance. The multiple package options and pin assignments make it ideal for high-speed applications and are easy to customize for user-defined applications. Output characteristics include guaranteed logic non-overflow and high current drive, plus a wide noise-immunity window.

The internal circuitry consists of six main blocks. The first block is the input buffer which contains a P-channel MOSFET which is used to prevent changes to the output in the event of input glitches, an optional isomorphic NAND-gate used to increase drive current, and a transmission gate to provide a controlled impedance path to increase noise immunity. The second block is the E/D with pull-up resistor that converts the input data into the output. The third block contains the sense amplifiers and latch that receive the input and clocks, record their status and determine the output data. The fourth block contains the clock dividers and multiplexers that provide the necessary processes for buffering data and keeping the output in sync with the input. The fifth block contains the output management logic that determines the output logic level and duty cycle. The sixth block is an optional low-power shutdown feature for power saving.

Features of the 74LVC1G125GF,132

The package has an 8-lead SOIC with an adjustable Termination Voltage range from 3.35 volt to 5.5 volt. It provides high output drive and enhanced noise immunity, low power dissipation (down to 2.7V) and a wide range of E/D settings. It features simple logic-level dependence, allowing the user to interface with both CMOS and TTL logic types.

The device offers high data rate and robust power dissipation characteristics as compared to competitive devices. It also provides high input, clock and data sensitivity, allowing lower-voltage operation. It\'s compatible with slow input transitions allowing it to be powered down at low operating voltages. Additionally, its adjustable termination voltage range allows the user to set the interface point for the logic level of their application.

Applications and Working Principle

The primary application of the 74LVC1G125GF,132 is in systems where high performance is key, such as communications and baseband circuitry, as well as bus level-shifting applications. The device works by receiving input data from the E/D, which is processed by the internal circuitry, resulting in an appropriate signal level output. For routing of signals, the device can be used as a signal and data buffer, or line driver.

The main principle of the device is to provide an adjustable voltage interface point between logic levels of user systems. The device contains logic-level feedback control which continuously monitors VOH and VOL, allowing it to adjust the output stage threshold voltage (VOPO) in order to achieve higher output voltage ratings while minimizing the dynamic power consumption. This allows the device to operate seamlessly across wide voltage ranges.

Conclusion

The 74LVC1G125GF,132 is a logic-level buffer, driver, receiver and transceiver device, which offers high output drive and enhanced noise immunity, as well as low-power dissipation and simple logic-level dependence. It is designed for performance-oriented systems like communications and baseband circuitry, as well as bus level-shifting applications. The device helps achieve an adjustable output stage threshold voltage while minimizing dynamic power consumption, allowing it to operate seamlessly across a wide voltage range.

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