MC74VHC245DWG

Overview

The MC74VHC245DWG is an octal bidirectional bus transceiver manufactured by onsemi, utilizing advanced high-speed CMOS technology. It operates within a supply voltage range of 2.0 V to 5.5 V and features three-state outputs. The device provides balanced propagation delays with a typical value of 4.0 ns at VCC = 5.0 V. It supports low power consumption with a maximum static current of 4.0 mA at 25°C and offers high noise immunity with noise margins of 28% for both high and low levels.

Feature Summary

• Provides eight independent data lines for bidirectional asynchronous communication between two buses.
• Features built-in electrostatic discharge protection circuits on all pins for enhanced reliability.
• Includes shutdown protection allowing output stages to withstand voltage shocks even when VCC is 0 V.

Applications

• Data bus interconnects in computing systems
• Communication equipment signal routing
• Industrial control system data transfer

Procurement Notes

Verify the specific suffix 'DWG' corresponds to the SOIC-20 surface-mount package and lead-free RoHS compliance status as documented in the official datasheet. Confirm that the part meets the required operating temperature range of -40°C to +85°C for your specific application environment before finalizing procurement.

Selection Notes

Select this component when high-speed bidirectional data transfer is required with low power consumption. Ensure the system voltage falls within the 2.0 V to 5.5 V range. Consider the 4.0 ns propagation delay for timing-critical designs. Verify compatibility with standard CMOS logic levels if using the VHC variant.

Part Context

This device belongs to the MC74VHC245 family of octal bus transceivers. It is designed for applications requiring fast switching speeds and low power dissipation. The VHC series represents an advancement over standard CMOS logic, offering improved performance metrics while maintaining compatibility with existing system architectures.

Replacement Considerations

Check for direct pin-compatible substitutes such as the MC74VHCT245DWG if TTL level compatibility is needed instead of CMOS. Verify that any replacement maintains the same 2.0 V to 5.5 V operating voltage range and SOIC-20 package dimensions.

FAQ

What is the typical propagation delay of the MC74VHC245DWG?

The typical propagation delay is 4.0 ns when the supply voltage (VCC) is 5.0 V.

Does the MC74VHC245DWG support hot-swapping applications?

Yes, the output stages can withstand voltage shocks even when VCC is 0 V, making it suitable for battery backup and hot-swap scenarios.