74LVC16T245DGGRE4

Overview

The SN74LVC16T245DGGRE4 is a 16-bit dual-supply bus transceiver from Texas Instruments, designed for asynchronous communication between data buses. It features configurable voltage-level shifting with independent power rails (VCCA and VCCB) supporting ranges of 1.65V to 3.6V and 2.7V to 5.5V respectively. The device operates within a temperature range of -40°C to +85°C and utilizes a 48-pin TSSOP package. Key electrical parameters include a propagation delay of 23.8 ns at 2.5V and output drive currents of ±32mA.

Feature Summary

• Supports bidirectional data transmission between two independent buses with configurable voltage levels
• Includes Ioff circuitry to prevent destructive backflow current during partial power-down scenarios
• Features VCC isolation functionality that forces both ports into a high-impedance state if either supply falls to ground

Applications

• Asynchronous communication between data buses in embedded systems
• Voltage level translation between mixed-voltage logic domains
• Memory interface bridging in consumer electronics

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance and RoHS status as per manufacturer documentation. Confirm the package type matches the required 48-TSSOP footprint for PCB layout. Ensure operating voltage requirements align with the specified 1.65V to 5.5V range across both power rails before integration.

Selection Notes

Select this component when interfacing systems requiring 16-bit wide data paths with differing voltage standards. It is suitable for applications needing robust isolation against power-down conditions. Consider the 23.8 ns propagation delay for timing constraints. Verify thermal performance within the -40°C to +85°C industrial range for the intended environment.

Part Context

This part belongs to the SN74LVC16T245 family of 16-bit bus transceivers. It shares functional similarities with other LVC series devices but offers specific dual-supply capabilities. The E4 suffix typically denotes environmental compliance attributes such as lead-free manufacturing, distinguishing it from standard commercial variants.

Replacement Considerations

Direct substitutes include SN74LVC16T245DGGR or SN74LVC16T245DLG. Verify pin compatibility and electrical specifications match exactly. Alternative packages like SSOP may require adapter solutions if physical footprint changes are acceptable.