MC74HC244ADTR2G-Q

Overview

The MC74HC244ADTR2G-Q is an octal non-inverting buffer and line driver manufactured by onsemi. It operates within a supply voltage range of 2 V to 6 V and features three-state outputs. The device utilizes HC CMOS logic technology and is housed in a TSSOP-20 surface-mount package. It supports a wide operating temperature range from -55°C to +125°C. Propagation delays vary with voltage: 96 ns at 2 V, 50 ns at 3 V, 18 ns at 4.5 V, and 15 ns at 6 V. It draws a maximum quiescent current of 160 µA and offers output currents of ±7.8 mA.

Feature Summary

• Octal configuration providing eight non-inverting buffers or line drivers in a single package
• Three-state outputs allowing direct connection to bus lines without additional interface hardware
• Automotive qualification compliant with AEC-Q100 standards for reliability
• Wide operating temperature range suitable for harsh industrial environments

Applications

• Memory address drivers for automotive systems
• Clock drivers in vehicle electronic control units
• Bus-oriented transmission applications requiring signal buffering
• Octal bus interfaces in automotive infotainment systems

Procurement Notes

Verify the specific suffix 'Q' indicates AEC-Q100 automotive qualification status. Confirm the TSSOP-20 package type matches your PCB footprint requirements. Ensure the voltage range of 2V to 6V aligns with your system's power supply rails. Check that the propagation delay specifications meet your timing constraints at the intended operating voltage. Validate RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component when an octal buffer with three-state capability is required for automotive bus applications. Consider the HC logic family for compatibility with standard 5V and 3.3V systems. Evaluate the propagation delay performance against your system's clock speed requirements. Verify that the TSSOP-20 package fits your available board space. Ensure the wide temperature range meets the environmental conditions of the target application.

Part Context

This part belongs to the MC74HC244A series of octal buffers. It is designed for use in memory address drivers and clock drivers. The device is optimized for bus-oriented applications. It provides high noise immunity typical of CMOS logic. The automotive grade version ensures reliability in demanding environments.

Replacement Considerations

Check for other MC74HC244 variants with different packages or qualifications. Verify pinout compatibility before substituting. Ensure the replacement part meets AEC-Q100 requirements if automotive use is intended. Compare propagation delays and output drive capabilities. Confirm voltage range compatibility.