74LVCH244ADB,112

Overview

The Nexperia 74LVCH244ADB,112 is an octal buffer and line driver featuring 3-state outputs. It operates within a supply voltage range of 1.2 V to 3.6 V and utilizes the SO20 plastic small outline package (SOT163-1). The device provides two output enables, each controlling four outputs, and includes bus hold circuitry on all data inputs. It supports partial power-down applications via IOFF circuitry and ensures ESD protection exceeding 2000 V (HBM) and 1000 V (CDM).

Feature Summary

• Bus hold functionality on all data inputs to maintain stable logic states.
• IOFF circuitry enabling safe partial power-down mode operation.
• Overvoltage tolerant inputs allowing direct interface with 5 V devices.

Applications

• Partial power-down systems requiring controlled backflow current prevention.
• Mixed voltage environments facilitating translation between 3.3 V and 5 V domains.
• High-speed data buffering for memory and storage architectures.

Procurement Notes

Verify the specific ordering suffix '112' corresponds to the standard tape-and-reel packaging configuration. Confirm that the SO20 package designation matches the required footprint for PCB layout. Ensure compliance with RoHS directives and REACH regulations as specified in the manufacturer's environmental documentation before finalizing procurement orders.

Selection Notes

Select this component when bus hold capability is required to prevent floating inputs during inactive states. Choose this part over the standard 74LVC244A variant if input stability without external pull-up or pull-down resistors is necessary. Verify that the 1.2 V to 3.6 V operating range aligns with the target system's power supply specifications.

Part Context

This component belongs to the 74LVCH244A family of octal buffers. It shares functional similarities with the 74LVC244A but distinguishes itself through integrated bus hold features on data inputs. The device serves as a high-performance solution for signal integrity in complex digital systems requiring robust input state retention.

Replacement Considerations

The 74LVC244AD,112 is a documented alternative within the same product family. Note that the standard LVC variant lacks the bus hold feature present in the LVCH version. Verify pinout compatibility and electrical characteristics before substituting components in existing designs.

FAQ

Does the 74LVCH244ADB include bus hold circuitry?

Yes, the 74LVCH244A variant specifically includes bus hold circuitry on all data inputs to maintain stable logic levels.

How does the IOFF circuitry function?

The IOFF circuitry disables the outputs to prevent potentially damaging backflow currents when the device is powered down.