MC74HC244ADTR2G

Overview

The MC74HC244ADTR2G is an octal 3-state noninverting buffer/line driver manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 6.0 V and features two active-low output enables. The device provides high noise immunity, low input current, and drive capability for 15 LSTTL loads. It is housed in a TSSOP-20 package with a maximum propagation delay of 18 ns at 4.5 V.

Feature Summary

• Octal 3-state noninverting buffer design
• Wide operating voltage range from 2.0 V to 6.0 V
• High noise immunity characteristic of CMOS devices

Applications

• 3-state memory address drivers
• Clock drivers
• Bus-oriented systems

Procurement Notes

Verify the specific ordering suffix 'DT' corresponds to the TSSOP-20 package configuration required for your assembly process. Confirm that the RoHS compliance status aligns with your manufacturing standards. Ensure the component meets the moisture sensitivity level requirements for your reflow soldering profile before placing orders.

Selection Notes

Select this component when interfacing standard CMOS or LSTTL outputs with High-Speed CMOS inputs. It serves as a suitable replacement for LS244 devices due to identical pinouts. Consider its wide voltage range for applications requiring flexibility between 2.0 V and 6.0 V operation.

Part Context

This part belongs to the MC74HC244A series, which includes octal 3-state noninverting buffers. It is functionally similar to the HC240A but without inversion. The device is designed for bus-oriented systems and offers compatibility with various logic families through its input structure.

Replacement Considerations

MC74HC244ADWG (SOIC-20 Wide)

FAQ

What is the relationship between the MC74HC244A and MC74LS244?

The MC74HC244A is identical in pinout to the LS244, allowing for direct replacement in many designs while offering CMOS advantages.

How are unused inputs handled?

Unused inputs must always be tied to an appropriate logic voltage level, either GND or VCC, to ensure proper functionality.