74LVC821ADB,112

Overview

The 74LVC821ADB,112 is an octal bus transceiver manufactured by Nexperia (formerly NXP Semiconductors). It features dual supply inputs and outputs with 3-state operation. The device facilitates bidirectional data transmission between two buses operating at different voltage levels. It is housed in a 20-pin SSOP package.

Feature Summary

• Octal configuration for high-density data routing
• Dual power supply capability for level translation
• Bidirectional data transfer functionality
• Three-state outputs to prevent bus contention

Applications

• Memory mapping systems
• Clock drivers
• Bus-oriented transmissions

Procurement Notes

Verify the manufacturer designation carefully, as Nexperia acquired the standard logic business from NXP. Confirm the specific suffix '112' corresponds to the SSOP-20 tape and reel packaging format required for your assembly line. Ensure the component meets RoHS compliance standards relevant to your region.

Selection Notes

Select this component when interfacing circuits with differing voltage domains, such as 1.8V to 3.3V or 3.3V to 5V systems. The octal width reduces board space compared to individual bit transceivers. Verify that the input voltage limits of the source bus do not exceed the absolute maximum ratings of the receiving side.

Part Context

This part belongs to the 74LVC family, designed for low-voltage CMOS applications. It serves as a critical interface element in mixed-voltage digital systems, allowing seamless communication between components powered by separate rails without requiring external level-shifting resistors.

Replacement Considerations

Check for direct equivalents like the SN74LVC4245A from Texas Instruments. Verify pin compatibility and electrical specifications before substitution. Note that while functionally similar, package dimensions and thermal characteristics may differ between manufacturers.