74LS125 DIP Quad 3-STATE Buffer

The 74LS125 is a high speed TTL integrated circuit containing four independent bus buffers with three state outputs. Each buffer features an active low enable input that controls the state of the output. When the enable input is low, the output is in the normal logic state, providing the same logic level as the input. When the enable input is high, the output enters a high impedance state, effectively disconnecting the buffer from the bus.

This IC is specifically designed for bus oriented systems where multiple outputs share a common line. The three state capability allows for efficient data transmission and prevents bus contention by ensuring only one device drives the line at any given time. Its low power Schottky construction provides high speed switching with low power dissipation, making it ideal for memory address driving, clock distribution, and data bus interfacing.

KEY FEATURES

• Quad independent bus buffers in one package
• Three state outputs for bus oriented applications
• Active low enable inputs for easy control
• High speed performance with low power consumption
• Compatible with all standard TTL logic families
• Standard 14 pin dual in line package

SPECIFICATIONS

• Supply Voltage 4.75V to 5.25V
• Operating Temperature 0 to 70 Celsius
• Logic Type TTL Low Power Schottky
• Propagation Delay 15ns
• High Level Output Current -2.6mA
• Low Level Output Current 24mA
• Input Voltage High 2.0V Minimum

INTERFACES

• 1A Buffer 1 data input
• 1G BAR Buffer 1 output enable active low
• 1Y Buffer 1 three state output
• 2A Buffer 2 data input
• 2G BAR Buffer 2 output enable active low
• 2Y Buffer 2 three state output
• 3A Buffer 3 data input
• 3G BAR Buffer 3 output enable active low
• 3Y Buffer 3 three state output
• 4A Buffer 4 data input
• 4G BAR Buffer 4 output enable active low
• 4Y Buffer 4 three state output
• VCC Positive supply voltage
• GND Ground reference