SN74AHCT125RGYR

The SN74AHCT125RGYR from Texas Instruments is a quadruple bus buffer gate featuring independent line drivers with 3-state outputs. Each output can be independently disabled when its associated output-enable (OE) input is high. When OE is low, the gate passes data from the A input to its Y output. This device is designed for applications requiring TTL-compatible inputs and CMOS outputs, operating within a voltage range of 4.5V to 5.5V.

The SN74AHCT125RGYR is housed in a 14-VQFN (3.5x3.5) exposed pad package, suitable for surface mounting. It offers a non-inverting logic type with four elements, each handling one bit. The operating temperature range is -40°C to 85°C. Latch-up performance exceeds 250mA per JESD 17, indicating robust performance under certain electrical stress conditions.

This buffer gate is part of the AHCT family, known for its balance of speed and power consumption. The 3-state outputs are crucial for bus-oriented systems where multiple devices share a common data line. Proper implementation of the output-enable signal is important for controlling data flow and preventing bus contention. For high-impedance states during power transitions, the OE input should be connected to VCC via a pull-up resistor, with the minimum resistor value determined by the driver's current-sinking capability.