74ABT126CSCX

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74ABT126CSCX is a quad buffer with 3-STATE outputs housed in a 14-Lead Small Outline Package (SOP). It operates within a supply voltage range of +4.5V to +5.5V and supports an ambient temperature range of -40°C to +85°C. The device features non-inverting logic with guaranteed latchup protection exceeding 300mA. Output drive capabilities include a sink current of 64mA and a source current of 32mA. Propagation delays are specified at a maximum of 4.6ns, with output enable times up to 6.5ns.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides four independent non-inverting buffers with high-impedance 3-STATE outputs controlled by active-low enable inputs.
• Features glitch-free bus loading during power-up and power-down cycles to prevent data corruption.
• Includes disable time that is less than enable time to avoid bus contention during state transitions.
• Supports nondestructive hot insertion for safe live connection and disconnection.

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed bus interface systems requiring buffered signal integrity.
• Partial power-down applications utilizing I_OFF circuitry to prevent backflow currents.
• Live insertion and extraction scenarios in telecommunications or computing hardware.

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package variant, as the 'C' suffix denotes SOP while other suffixes indicate different packages. Confirm RoHS compliance status through official documentation, as manufacturing processes may vary. Check for obsolescence notices from onsemi or Fairchild Semiconductor, as this component originates from legacy product lines. Ensure the ordering suffix matches the required reel or tube packaging configuration for your assembly process.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when a quad buffer with 3-STATE control is required for 5V logic systems. It is suitable for applications needing high output drive strength and protection against bus contention. Consider the SOP package dimensions if space constraints allow. Verify compatibility with TTL input levels and ensure the operating temperature range meets environmental requirements.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the ABT logic family, designed for BiCMOS high-speed performance. It interfaces directly with TTL levels while maintaining low power consumption. The 74ABT126 series is widely used in digital communication systems where signal buffering and isolation are critical for maintaining data integrity across multiple nodes.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include the 74ABT126D and 74ABT126PW from NXP Semiconductors. Other compatible options may include variants from Texas Instruments or Microchip Technology within the same logic family. Verify pinout compatibility and electrical specifications before substitution.

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle partial power-down conditions?

The device includes I_OFF circuitry that disables the output to prevent potentially damaging backflow currents when the device is powered down but the system bus remains active.

What is the relationship between disable and enable times?

The disable time is guaranteed to be less than the enable time. This characteristic helps avoid bus contention when switching the outputs between active and high-impedance states.