MC74VHC245DW

Overview

The MC74VHC245DW is an octal bidirectional bus transceiver manufactured by onsemi using advanced high-speed CMOS technology. It facilitates asynchronous communication between two data buses with eight independent data lines. The device operates within a DC power supply voltage range of 2.0 V to 5.5 V. Key electrical characteristics include a typical propagation delay of 4.0 ns at VCC = 5.0 V and a maximum static supply current of 4.0 mA at 25°C. It features balanced propagation delays, high noise immunity with VNIH and VNIL at 28%, and supports output currents of ±8 mA.

Feature Summary

• Provides bidirectional asynchronous communication across eight independent data lines for efficient data bus interfacing.
• Incorporates built-in electrostatic discharge protection circuits on all pins to enhance component reliability during handling.
• Maintains output voltage tolerance even when VCC is at 0 V, ensuring safe operation in hot-plug scenarios.

Applications

• Bidirectional data transfer between memory modules and microcontrollers
• Interfacing between different logic families in mixed-voltage systems
• High-speed data routing in industrial control and communication equipment

Procurement Notes

Verify the specific suffix 'DW' corresponds to the SOIC-20 package configuration required for your PCB layout. Confirm that the operating voltage range of 2.0 V to 5.5 V aligns with your system's power supply rails. Ensure that the ESD protection levels meet the environmental requirements of your final assembly process. Cross-reference the datasheet revision date to guarantee compatibility with your design specifications.

Selection Notes

Select this component when high-speed bidirectional data transfer is required with low power consumption. The 4.0 ns propagation delay makes it suitable for applications demanding faster response times than standard HC series devices. The wide operating voltage range allows flexibility in system design, supporting both 3.3 V and 5.0 V logic levels without external level shifting components.

Part Context

This part belongs to the MC74VHC245/MC74VHCT245A family of bus transceivers designed for high-performance digital applications. The VHC variant specifically offers faster switching speeds compared to standard HC or HCT counterparts while maintaining low power dissipation. It serves as a critical interface component in modern electronic systems requiring reliable data transmission between disparate circuit blocks.

Replacement Considerations

MC74VHC245DWG: Identical functional specification with RoHS-compliant packaging designation.