SN74HCS126DYYR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCS126DYYR is a quadruple buffer with 3-state outputs and Schmitt-trigger inputs manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports an ambient temperature range from -40°C to +125°C. The device features balanced CMOS outputs capable of ±7.8-mA drive current at 6 V, low power consumption with typical ICC of 100 nA, and extended hysteresis for noise rejection. It is housed in a 14-pin SOT-23-THIN package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Schmitt-trigger inputs provide tolerance for slow or noisy input signals through defined hysteresis thresholds.
• Balanced CMOS 3-state outputs allow driving high, driving low, or entering a high-impedance state via the OE pin.
• Low power consumption characteristics include minimal static supply current and input leakage.

Buffers, Drivers, Receivers, Transceivers Applications

• Enable or disable digital signals
• Controlling indicator LEDs
• Switch debounce circuits
• Eliminating slow or noisy input signals

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix DYYR corresponds to the SOT-23-THIN 14-pin package configuration. Confirm RoHS compliance and lead finish details (NIPDAU) against the latest orderable addendum. Ensure the selected variant matches the required thermal resistance and moisture sensitivity level for the intended assembly process.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when signal buffering requires noise immunity provided by Schmitt-trigger inputs. The 3-state output capability allows bus sharing or signal gating via the Output Enable pin. Verify that the load capacitance remains within recommended limits to maintain specified propagation delays and transition times.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74HCS series of HCMOS logic devices. It provides four independent non-inverting buffers. The DYYR suffix indicates the specific thin small-outline package variant designed for surface-mount applications, distinct from standard SOIC or TSSOP packages available in the same family.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HCS126PW

Buffers, Drivers, Receivers, Transceivers FAQ

How does the Schmitt-trigger architecture affect input handling?

The Schmitt-trigger inputs provide hysteresis, making the device tolerant to slow or noisy input signals. This prevents multiple transitions caused by noise near the switching threshold.

What is the function of the OE pin?

The Output Enable (OE) pin controls the 3-state output. Applying a Low to OE places the outputs in a high-impedance state, while a High allows normal buffer operation.