74LVC139DB,112

Signal Switches, Multiplexers, Decoders Overview

The 74LVC139DB,112 is a dual 2-to-4 line decoder/demultiplexer manufactured by Nexperia. It operates on a single power supply ranging from 1.2 V to 3.6 V and features overvoltage tolerant inputs up to 5.5 V. The device contains two independent decoders, each accepting two binary weighted address inputs (nA0, nA1) and providing four mutually exclusive active LOW outputs (nY0 to nY3). Each decoder includes an active LOW enable input (nE). When the enable input is HIGH, all outputs are forced HIGH. The component utilizes Schmitt-trigger action at all inputs to tolerate slower rise and fall times.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent 2-to-4 decoding capability with active LOW mutually exclusive outputs
• Demultiplexing functionality where the enable input serves as the data input
• Wide supply voltage range supporting operation from 1.2 V to 3.6 V
• Overvoltage tolerant inputs allowing direct interface with 5 V devices

Signal Switches, Multiplexers, Decoders Applications

• Address decoding in mixed 3.3 V and 5 V environments
• Data distribution using demultiplexer configuration
• Signal routing in digital logic circuits

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix '112' against the manufacturer's current documentation to confirm package type and tape/reel specifications. Ensure the procurement matches the SO16 plastic small outline package variant defined for this part number. Confirm RoHS compliance status and temperature range requirements (-40 °C to +125 °C) align with the application environment before finalizing orders.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a dual decoder or demultiplexer is required within a low-voltage CMOS system. The LVC series offers compatibility with both 3.3 V and 5 V logic levels due to its wide operating voltage range and overvoltage tolerant inputs. Consider the SO16 package dimensions if board space constraints require a standard small outline footprint. Verify that the input transition rates do not exceed the specified limits for the chosen supply voltage.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the 74LVC family of high-speed CMOS logic integrated circuits. The 74LVC139 is functionally similar to other decoders in the series but is optimized for lower voltage operations compared to older HC or HCT families. It provides a pin-compatible alternative for designs requiring dual decoding functions in compact surface-mount packages.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The datasheet revision history notes that the type number 74LVC139DB (SOT338-1/SSOP16) was removed in version 6. Designers should verify that the DB suffix corresponds to the SOT109-1 (SO16) package and not obsolete SSOP variants.