74AUC1G125DBVRE4

Overview

The SN74AUC1G125 is a single bus buffer gate with a 3-state output, part of the AUC logic family optimized for speed and low voltage operation. It operates within a wide supply voltage range of 0.8 V to 2.7 V, specifically optimized for 1.65-V to 1.95-V applications. The device features over-voltage tolerant I/Os supporting up to 3.6 V independent of VCC. It provides ±8-mA output drive at 1.8 V and achieves a maximum propagation delay of 2.5 ns at 1.8 V with a 30-pF load. The component supports partial power-down mode via Ioff circuitry and offers latch-up performance exceeding 100 mA per JESD 78, Class II.

Feature Summary

• Optimized for high-speed digital signal processing in sub-1-V little logic applications
• Features ULTTL outputs designed for excellent signal integrity without external termination on moderate-length transmission lines
• Includes Ioff circuitry to support partial power-down modes and prevent back-drive current damage

Applications

• Redriving digital signals
• Enabling or disabling digital signals
• Driving transmission lines with logic

Procurement Notes

Verify the specific package variant (DBV, DCK, or YZP) required for your design, as the base part number covers multiple form factors. Confirm that the ordering suffix matches the desired reel quantity and lead finish specifications. Ensure the selected component meets the -40°C to 85°C operating temperature range for your intended environment. Cross-reference the datasheet revision history for any recent updates to electrical characteristics or pin configurations before finalizing procurement.

Selection Notes

Select this component when system requirements demand high-speed buffering with minimal propagation delay under low voltage conditions. The AUC family is suitable for designs requiring direct connection to controlled impedance transmission lines between 30 and 70 Ω. Consider the Ioff feature if the application involves partial power-down scenarios where preventing back-feed current is critical. Ensure input transition rates comply with recommended operating conditions to avoid excessive power consumption.

Part Context

This device belongs to Texas Instruments' AUC logic family, which is engineered for superior speed and low power consumption compared to standard CMOS families. The SN74AUC1G125 serves as a single-channel buffer within this series, providing non-inverting logic with three-state output control. It complements other AUC devices by offering robust performance in portable and battery-operated systems where voltage efficiency and signal integrity are paramount.

Replacement Considerations

SN74AUC1G125DBVR

FAQ

How does the Ioff feature function during power-down?

The Ioff circuitry disables all outputs when the supply pin is held at 0 V, preventing damaging current backflow through the device regardless of applied input voltages.

What is the maximum voltage tolerance for inputs and outputs?

The I/Os are over-voltage tolerant and support up to 3.6 V, independent of the VCC supply voltage.