MC74VHC245DTR2

Overview

The MC74VHC245DTR2 is an octal bidirectional transceiver manufactured by onsemi, belonging to the VHC logic series. It utilizes advanced high-speed CMOS technology and operates within a supply voltage range of 2.0 V to 5.5 V. The device features eight independent data lines for asynchronous communication between two buses. Key electrical parameters include a typical propagation delay of 4.0 ns at 5.0 V, balanced output drive capability of ±8 mA, and low static current consumption. It provides three-state outputs and includes direction control via the DIR pin and output enablement via the OE pin.

Feature Summary

• High-speed data transmission with balanced propagation delays optimized for bus-oriented applications
• Wide operating voltage range supporting 2.0 V to 5.5 V systems
• Built-in electrostatic discharge protection exceeding 2000 V human body model rating
• Output disable feature ensures high-impedance state for bus isolation

Applications

• Memory address driving in computing systems
• Bidirectional data bus buffering in industrial control
• Level translation between 3.3 V and 5.0 V logic domains
• General-purpose bus transceiver circuits in consumer electronics

Procurement Notes

Verify the specific suffix DTR2 indicates tape-and-reel packaging when ordering. Confirm the active status directly with onsemi or authorized distributors, as component lifecycle stages can change. Ensure the required quantity matches the reel specifications provided in official documentation. Cross-reference the datasheet revision date to ensure compatibility with current design requirements.

Selection Notes

Select this component when designing systems requiring fast, bidirectional data transfer across multiple lines. The VHC series offers superior speed compared to standard AC/HC families while maintaining CMOS power efficiency. Consider the 2.0 V minimum supply voltage if powering from lower voltage sources. Verify that the TSSOP-20 package fits the available PCB footprint and thermal constraints of the target application.

Part Context

This part belongs to the MC74VHC245 family of octal bus transceivers. It shares functional similarities with other members like the MC74AC245 but differs in process technology and speed characteristics. The VHC series represents a higher-performance tier within onsemi's CMOS logic portfolio, designed for modern high-speed digital interfaces where low power and fast switching are critical.

Replacement Considerations

Public confirmed substitute part numbers: MC74VHC245DTG, MC74VHC245DW.