SN74LV139ANSRE4

Overview

The SN74LV139ANSRE4 is a dual 2-line to 4-line decoder/demultiplexer from the Texas Instruments SN74LV139A series. It operates within a supply voltage range of 2V to 5.5V and supports mixed-mode voltage operation on all ports. The device incorporates two active-low enable inputs to simplify cascading and data reception. Designed for high-speed memory decoders and data-transmission systems, it features fully buffered inputs representing only one normalized load to its driving circuit. The component includes Ioff circuitry to support partial-power-down mode operation by disabling outputs and preventing damaging current backflow when powered down.

Feature Summary

• Supports mixed-mode voltage operation across all ports
• Incorporates two enable inputs to simplify cascading and data reception
• Features Ioff circuitry for partial-power-down mode operation

Applications

• High-speed memory decoding
• Data-transmission systems
• Data-routing applications requiring short propagation delay times

Procurement Notes

Verify that the ordering suffix 'E4' corresponds to the specific lead finish and environmental compliance requirements documented in the TI Package Option Addendum. Confirm the package type matches the SOP (NS) designation with 16 pins. Ensure the moisture sensitivity level rating aligns with your assembly process capabilities.

Selection Notes

Select this component when a dual 2-to-4 line decoding function is required within a 2V to 5.5V operating range. It is suitable for designs needing mixed-voltage port compatibility and low input loading. Consider the Ioff feature if partial-power-down functionality is necessary to prevent backflow currents during power-off states.

Part Context

This part belongs to the SN74LV139A family of logic ICs manufactured by Texas Instruments. The family consists of dual 2-line to 4-line decoders and demultiplexers designed for CMOS technology. The SN74LV139ANSRE4 specifically utilizes the SOP (NS) package variant, providing a 16-pin configuration suitable for surface-mount assembly.

Replacement Considerations

SN74LV139ADBR

FAQ

How does the Ioff feature benefit system design?

The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is in a partial-power-down state.

What is the maximum propagation delay at 5V?

The maximum propagation delay (tpd) is 7.5ns at a supply voltage of 5V with a 15pF load capacitance.