SN74HCS126DR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCS126DR is a quadruple buffer featuring three-state outputs and Schmitt-trigger inputs, manufactured by Texas Instruments. It operates within a wide supply voltage range of 2 V to 6 V and supports an extended ambient temperature range from –40°C to +125°C. The device provides low power consumption with typical ICC of 100 nA and input leakage current of ±100 nA. It delivers an output drive of ±7.8 mA at 6 V. Available in 14-pin SOIC (D) and TSSOP (PW) packages, it performs the Boolean function Y = A.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Schmitt-trigger inputs provide tolerance for slow or noisy input signals through hysteresis.
• Balanced CMOS three-state outputs allow driving high, driving low, or entering a high-impedance state via the OE pin.
• Low power consumption characteristics include minimal supply and input leakage currents.
• Extended operating temperature range supports use in harsh industrial environments.

Buffers, Drivers, Receivers, Transceivers Applications

• Enable or disable digital signals
• Controlling indicator LEDs
• Debouncing switches
• Eliminating slow or noisy input signals

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package variant required, as the SN74HCS126DR designation corresponds to the SOIC package. Confirm that the ordering suffix matches the desired carrier type and material specifications found in the official orderable addendum. Ensure compatibility with the target system's voltage and thermal requirements before procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when signal conditioning with noise rejection is required alongside bus isolation capabilities. The Schmitt-trigger inputs make it suitable for interfaces with slow transition rates. Verify that the load capacitance remains within recommended limits to maintain specified switching performance and avoid excessive ringing on the output lines.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the HCS (High-Speed CMOS) logic family from Texas Instruments. It serves as a buffer and line driver with tri-state control. The 'DR' suffix indicates the SOIC package option. It is designed for general-purpose digital applications requiring robust input handling and controlled output states.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check for direct pin-compatible alternatives within the same HCS family or standard HCMOS series if availability is constrained. Ensure any substitute maintains the Schmitt-trigger input characteristic and three-state output functionality to preserve circuit behavior without redesign.

Buffers, Drivers, Receivers, Transceivers FAQ

How are unused inputs handled?

Unused inputs must not be left floating; they should be terminated to either VCC or ground using a pull-up or pull-down resistor to prevent undefined operational states.

What is the effect of slow input signals?

Due to the Schmitt-trigger architecture, the device tolerates slow input transitions without causing excessive dynamic current consumption or oscillation, unlike standard CMOS inputs.