74LS126 Quad 3 State Buffer IC (74126) DIP 14 Package

74LS126 Quad 3 State Buffer IC (74126) DIP 14 Package

The 74LS126 is a Quad 3-State Buffer IC from the 74LS (Low Power Schottky TTL) logic family.
It contains four independent non-inverting buffer gates, each with a 3-state output controlled by an individual enable input.

Each output can be in one of three states:

• HIGH (logic 1)
• LOW (logic 0)
• High Impedance (Hi-Z)

The Output Enable (OE) input for each buffer is active HIGH, meaning the output is enabled when OE = HIGH and in Hi-Z (disconnected) when OE = LOW.

The 74LS126 is widely used in bus driver applications, signal buffering, and data line isolation where multiple devices share a common bus.

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Specifications:-

• Package Type:            DIP
• Logic Element:           Quad 3-State Buffer, Non- Inverting
• Voltage Rating:           4.75 to 5.25V
• Current Rating:           8mA Output Current
• Temperature Rating:    0 to 70 Deg C
• Number of Pins:          14

Functional Description

The 74LS126 provides buffering and isolation between different parts of a digital system.
When enabled, it acts as a non-inverting buffer (logic amplifier).
When disabled (OE = LOW), its output is disconnected from the circuit (Hi-Z), allowing multiple devices to safely share a common output or bus line.

This makes it ideal for bus-oriented systems, microprocessor interfaces, and data transfer control circuits.

Applications

• Bus Driver and Receiver Circuits
• Microprocessor Data Bus Control
• Signal Isolation and Buffering
• Logic Level Interface Between Devices
• Memory Address/Data Line Buffers
• Peripheral Device Interfaces
• Multiplexed or Bidirectional Bus Systems

74ls126-ic-datasheet