The 74ABT125CMTX is a quad bus buffer gate with 3-STATE outputs manufactured by Fairchild/ON Semiconductor. It belongs to the 74ABT (Advanced BiCMOS Technology) family, which combines the speed of bipolar technology with the low power consumption of CMOS. This device is designed for applications requiring high-speed buffered outputs and controlled signal propagation.

Applications

• Memory address drivers
• Clock drivers
• Line transceivers
• High-speed data transmission
• Backplane driving

Features

• High-speed operation: Propagation delay is typically around 3ns to 5ns.
• 3-STATE outputs: Allows for connection to a bus without loading it when disabled.
• Low power consumption: Characteristic of the ABT family.
• High output drive capability: Can drive heavily loaded buses.
• Individual enable inputs: Each buffer has its own enable pin for flexible control.

Benefits

• Improved system performance: High-speed operation minimizes signal delays.
• Increased system flexibility: 3-STATE outputs allow multiple devices to share a common bus without conflict.
• Reduced power consumption: Lower power dissipation compared to older TTL families.
• Enhanced signal integrity: High output drive ensures reliable signal transmission across the bus.
• Simplified system design: Quad buffer configuration simplifies interfacing.

Additional Details

The 74ABT125CMTX comes in a surface-mount package. The device consists of four independent bus buffer gates. Each buffer has a 3-STATE output that can be enabled or disabled via its respective enable (OE) input. When the OE input is high, the output is in a high-impedance state, effectively disconnecting the buffer from the bus. When OE is low, the output is enabled, and the buffer passes the input signal to the output. It operates over a standard industrial temperature range.