74ALVC164245DL,118

Overview

The 74ALVC164245 is a high-performance, low-power, low-voltage Si-gate CMOS device featuring a 16-bit dual supply translating transceiver with non-inverting 3-state bus compatible outputs. It interfaces between a 3 V port (VCC(A): 1.5 V to 3.6 V) and a 5 V port (VCC(B): 1.5 V to 5.5 V). The device supports two 8-bit or one 16-bit configuration. Control inputs operate from 2.7 V to 5.5 V. It includes IOFF circuitry for partial power-down mode operation, ensuring no current flow when supplies are zero. ESD protection exceeds 2000 V (HBM) and 1000 V (CDM).

Feature Summary

• Dual supply voltage range supporting 1.5 V to 3.6 V on Port A and 1.5 V to 5.5 V on Port B.
• IOFF circuitry provides partial power-down mode operation preventing damaging backflow current.
• Overvoltage tolerant inputs up to 5.5 V allowing direct interface with TTL levels.
• High-impedance outputs when either supply voltage is zero.

Applications

• Mixed 3 V and 5 V supply environments
• Bus-oriented communications
• Memory mapping

Procurement Notes

Verify the package type matches the required design constraints. The datasheet indicates that the DL variant (SSOP-48) was removed in revision 11; confirm availability of the DGG variant (TSSOP48) or other active packages. Ensure the specific ordering suffix aligns with the desired temperature range and packaging specifications before finalizing procurement.

Selection Notes

Select this component for applications requiring bidirectional level translation between 3 V and 5 V logic domains. It is suitable for systems needing simultaneous access to multiple voltage buses. Consider the TSSOP48 package dimensions if space is limited. Verify that control input voltages remain within the 2.7 V to 5.5 V range for proper functionality.

Part Context

This device belongs to the ALVC/VCX/A series of logic components manufactured by Nexperia. It is designed as a high-speed transceiver for mixed-voltage systems. The product data sheet defines its electrical characteristics, pin configurations, and functional behavior for integration into digital circuits requiring reliable signal translation.

Replacement Considerations

The 74ALVC164245DL (SSOP-48) was removed in revision 11 of the datasheet. Designers should consider the 74ALVC164245DGG (TSSOP48) as the primary alternative package option. Verify pin compatibility and thermal performance when substituting package types.

FAQ

What is the function of the IOFF circuitry?

The IOFF circuitry disables the output to prevent damaging backflow current through the device when it is powered down.

How does the device handle suspend mode?

In suspend mode, when one supply voltage is zero, there is no current flow from the non-zero supply towards the zero supply, provided the nAn-outputs are set to 3-state.