MC74VHCT240ADTR2

Overview

The MC74VHCT240ADTR2 is an octal bus buffer and line driver from onsemi's VHCT logic family. It features eight unidirectional channels with three-state outputs, housed in a TSSOP-20 package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical specifications include a maximum propagation delay of 11 ns and a static current of 4 uA. The component supports surface mount installation and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides high-speed buffering for digital signals using silicon gate CMOS technology
• Features three-state outputs to facilitate efficient data bus management
• Ensures signal integrity through defined input and output characteristics

Applications

• Data bus buffering in computer systems
• Clock distribution networks
• Memory interface circuits

Procurement Notes

Verify the specific suffix 'DTR2' against official manufacturer documentation to confirm tape and reel packaging details. Ensure the part number matches the exact VHCT series designation. Cross-reference RoHS compliance status with the latest datasheet revision. Confirm that the TSSOP-20 package dimensions align with your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when interfacing 5V logic systems requiring octal buffering capabilities. The VHCT series ensures compatibility with standard TTL inputs while maintaining CMOS performance levels. Consider the 11 ns propagation delay for timing-sensitive applications. Verify that the 4.5 V minimum supply voltage meets your system's power rail specifications.

Part Context

This part belongs to the MC74VHCT240A series, which includes variants like MC74VHCT240ADTR2G. The 'G' suffix typically denotes Green/RoHS-compliant packaging, whereas 'DTR2' specifies the tape and reel configuration. It is distinct from the HC series by offering TTL-compatible inputs. The device serves as a critical interface element in digital logic designs requiring signal isolation or driving capability.

Replacement Considerations

Check for MC74VHCT240ADTR2G as a potential equivalent if RoHS compliance is required. Verify pinout compatibility with other octal bus buffers in the VHCT family. Ensure substitute parts maintain the same 3-state output functionality and voltage range.