The SN74LS126A from Texas Instruments is a high-performance, quad bus buffer gate featuring 3-state outputs designed to be employed in bus-oriented systems. This integrated circuit is part of the 74LS logic family, which is well-known for its low power consumption and high speed.
Key Features:
- Logic Type: Quad Bus Buffer Gate with 3-State Outputs
- Operating Voltage: Typically 5V (4.75V to 5.25V)
- Output Drive Capability: Capable of driving 15 LSTTL loads
- Package: Available in various packages including PDIP, GDIP, PDSO, and SOP
- Temperature Range: 0°C to 70°C operational range, making it suitable for commercial applications
The SN74LS126A features four independent buffer gates, each with a 3-state output. The 3-state output configuration allows for the outputs to assume a high impedance state, in addition to the active high and low states. This high impedance state is crucial for allowing multiple outputs to connect to a common bus line without interference.
Each buffer gate has a separate output-enable (OE) input that controls the state of the output. A low level at the OE input puts the output in an active state, while a high level puts the output in the high impedance state. This enables the designer to effectively control the flow of data through bus lines by enabling or disabling specific sections of the bus.
The SN74LS126A is designed with the Schottky clamped process which minimizes the propagation delay times and reduces the power consumption. The typical propagation delay time is 9ns, allowing for fast data transfer and processing speeds which are essential in modern digital applications.
Applications for the SN74LS126A include memory address drivers, clock drivers, and bus-oriented systems where multiple outputs need to interface with a common bus line without risking bus contention.
Overall, the SN74LS126A from Texas Instruments is a reliable and efficient choice for designers looking to implement bus buffering with 3-state logic in their digital systems.
