SN74AUC1G19DCKR

Overview

The SN74AUC1G19DCKR is a single-channel 1-of-2 decoder/demultiplexer from the Texas Instruments AUC series. It operates within a supply voltage range of 0.8 V to 2.7 V and is optimized for 1.65-V to 1.95-V applications. The device features an active-low enable input (E) that buffers data from input A to outputs Y0 (true) and Y1 (complement). It provides ±8-mA output drive at 1.8 V, with a maximum propagation delay of 3 ns at 1.8 V. Static current consumption is limited to 10 µA maximum.

Feature Summary

• Supports partial-power-down mode operation via Ioff circuitry to prevent damaging backflow currents when powered down.
• Optimized for mixed-mode signal operation with 3.6-V I/O tolerance while operating at lower supply voltages.
• Provides robust electrostatic discharge protection exceeding JESD 22 standards across multiple testing models.

Applications

• Portable audio devices such as MP3 players and recorders
• Solid state drives for client and enterprise systems
• Wireless peripherals including headsets, keyboards, and mice

Procurement Notes

Verify the specific package variant against the orderable addendum in the datasheet, as the SN74AUC1G19 family includes multiple packages like SOT-23 and DSBGA. Confirm that the SC70-6 package matches the required footprint. Ensure the design accounts for the recommended operating conditions regarding supply voltage and temperature ranges specified in the electrical characteristics tables.

Selection Notes

Select this component when a compact 1-of-2 demultiplexer is required for sub-1-V or low-voltage logic systems. The device is specifically designed for 1.65-V to 1.95-V operation but remains functional across a broader 0.8-V to 2.7-V range. Consider the NanoFree™ packaging technology if minimizing board space is a priority, noting that the DCK package represents the SC70 form factor.

Part Context

This device belongs to the Texas Instruments SN74AUC1Gxx series of Little Logic devices. These components are characterized by high speed and low power consumption, utilizing advanced semiconductor processes to achieve performance suitable for portable and battery-operated electronics. The AUC series supports mixed-voltage interfaces, making it suitable for bridging different logic domains in modern embedded systems.

Replacement Considerations

SN74AUC1G19DBVR

FAQ

How does the device handle partial-power-down scenarios?

The SN74AUC1G19DCKR includes Ioff circuitry that disables the outputs when the device is powered down. This prevents damaging current backflow through the device, allowing it to be fully specified for partial-power-down applications.

What is the function of the Enable (E) input?

The Enable (E) input is active-low. When E is low, the device buffers the data on input A and passes it to the outputs Y0 (true) and Y1 (complement). When E is high, both outputs remain in a high state regardless of the input A state.