MC74VHC244DT

Overview

The MC74VHC244DT is an octal bus buffer manufactured by onsemi, belonging to the VHCT logic family. It features eight non-inverting inputs and outputs with three-state capability, housed in a 20-pin TSSOP package. The device operates within a supply voltage range of 2.0 V to 3.6 V. Key electrical parameters include a propagation delay of 10 ns at 3.3 V and 8 ns at 5 V, with a maximum static current of 20 µA. It supports a low output drive current of 24 mA and functions reliably across an operating temperature range of -55°C to +125°C.

Feature Summary

• Provides octal buffering with three-state outputs for efficient data bus management
• Ensures compatibility with TTL input levels through VHCT technology
• Delivers high-speed signal transmission with low propagation delays
• Operates effectively across a wide industrial temperature range

Applications

• Mobile applications requiring low power consumption
• Consumer products utilizing portable battery-powered systems
• Computing equipment needing high-density bus buffering
• Telecommunications infrastructure requiring reliable signal integrity

Procurement Notes

Verify the specific suffix 'DT' corresponds to the tape and reel packaging format when ordering. Confirm that the VHCT logic family requirements align with your system's voltage translation needs. Ensure the 20-TSSOP footprint matches your PCB layout constraints. Check for any recent product change notices regarding manufacturing sites or materials. Validate RoHS compliance status for your specific region before finalizing procurement.

Selection Notes

Select this component when designing systems that require interface between 3.3 V buses and 5 V tolerant devices. The VHCT series offers superior speed compared to standard HCT logic while maintaining CMOS low power characteristics. Consider the 24 mA drive strength for driving moderate capacitive loads. The wide operating temperature range makes it suitable for harsh environments where standard commercial grade parts may fail.

Part Context

This part belongs to the MC74VHC244A series of octal buffers. It serves as a critical interface component in digital logic circuits, facilitating data transfer between different subsystems. The device is part of onsemi's broader portfolio of high-performance logic ICs designed for modern electronic applications requiring compact packaging and efficient power usage.

Replacement Considerations

Direct substitutes include MC74VHC244DTR2G and MC74VHC244DTG. Verify pinout compatibility and electrical specifications before swapping. Alternative families like MC74LVX244 offer similar functionality but may differ in voltage ranges and drive strengths.