SN74LVC1G19DCK3

Overview

The SN74LVC1G19DCK3 is a single 1-of-2 decoder/demultiplexer from the Texas Instruments 74LVC1G series. It operates within a supply voltage range of 1.65 V to 5.5 V and features Schmitt-trigger inputs for noise tolerance. The device provides two outputs: one true (1Y) and one complement (2Y), controlled by an active-low enable input. When enabled, it buffers input A to the respective outputs; when disabled, both outputs assume a HIGH state. It includes IOFF circuitry for partial power-down protection and supports mixed 3.3 V and 5 V environments.

Feature Summary

• Provides 1-of-2 decoding with common output enable control
• Includes IOFF circuitry to prevent backflow current during partial power-down
• Schmitt-trigger inputs ensure tolerance for slow rise and fall times

Applications

• Mixed 3.3 V and 5 V system interfacing
• Partial power-down mode applications requiring backflow prevention
• Signal routing in low-voltage digital logic circuits

Procurement Notes

Verify the specific suffix 'DCK3' against the official Texas Instruments datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with required operating temperature ranges and check for RoHS compliance status as defined in the manufacturer's documentation before procurement.

Selection Notes

Select this component for designs requiring a compact decoder with overvoltage tolerant inputs. The LVC series offers CMOS low power dissipation and direct interface with TTL levels. Verify that the SC-70-6 package fits the PCB layout constraints and that the 1.65 V to 5.5 V supply range matches the system power rails.

Part Context

This part belongs to the Texas Instruments 74LVC1G family of single-gate logic devices. These components are designed for space-constrained applications, offering high speed and low power consumption. The 74LVC1G19 specifically functions as a decoder/demultiplexer, distinct from inverters or buffers within the same series.

Replacement Considerations

Cross-reference with SN74LVC1G19DCKR or SN74LVC1G19DBVR for equivalent functionality in different packaging options. Verify pinout compatibility and electrical characteristics match the original design requirements.