SN74LVCZ244AN

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVCZ244A is an octal buffer and line driver designed for 2.7-V to 3.6-V VCC operation. It consists of two independent 4-bit drivers with separate output-enable (OE) inputs. The device supports mixed-mode signal operation, allowing 5-V input tolerance on all ports while powered by 3.3 V. Key electrical characteristics include a maximum propagation delay of 5.9 ns at 3.3 V and typical output ground bounce (VOLP) of 2 V at VCC = 3.3 V. It features Ioff support for partial-power-down mode and power-up 3-state circuitry to prevent bus contention during hot insertion.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports live insertion and partial-power-down modes via Ioff circuitry that disables outputs when VCC is low.
• Enables mixed-mode signal operation by accepting 5-V input voltages while operating from a 3.3-V supply.
• Provides power-up 3-state functionality to maintain high-impedance outputs during power transitions.

Buffers, Drivers, Receivers, Transceivers Applications

• Servers
• Databases
• Memory Systems
• Network Switches
• PCs and Notebooks

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package variant required, as the SN74LVCZ244A family includes SSOP, SOIC, SO, and TSSOP options. Confirm that the selected part number suffix matches the desired physical footprint and reel quantity. Ensure design compatibility with the 2.7-V to 3.6-V supply range and check thermal resistance values if operating near the upper temperature limits.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring voltage translation between 5-V logic sources and 3.3-V systems. It is suitable for designs needing robust protection against back-driving currents and bus conflicts during power sequencing. Consider the specific package thermal performance and pin count requirements when choosing between the available form factors.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments LVCZ series, which extends standard LVC logic with enhanced capabilities for mixed-voltage environments. Unlike standard variants, the Z-series specifically emphasizes 5-V input tolerance and robust handling of partial-power-down scenarios, making it distinct within the broader 74LVC family.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVC244ADW

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle inputs when VCC is 0 V?

The Ioff feature ensures that outputs are disabled to prevent damaging current backflow through the device when it is powered down or when VCC is 0 V.

Can this device translate signals between 5-V and 3.3-V domains?

Yes, the inputs accept voltages up to 5.5 V, allowing the device to function as a translator in mixed 3.3-V/5-V system environments while operating from a 3.3-V supply.