74LVC244AMTR

Overview

The STMicroelectronics 74LVC244AMTR is a low-voltage CMOS octal bus buffer with three-state outputs, fabricated using sub-micron silicon gate and double-layer metal wiring C2MOS technology. It operates within a supply voltage range of 1.65V to 3.6V, supporting data retention at 1.2V. The device features five-volt tolerant inputs and outputs, allowing direct interfacing with mixed 3.3V and 5V logic environments. It provides symmetrical output impedance with high drive capabilities and balanced propagation delays.

Feature Summary

• Octal bus buffer architecture with three-state outputs controlled by dedicated enable inputs
• Five-volt tolerant inputs and outputs for seamless integration in mixed voltage systems
• Power-down protection on all inputs and outputs to prevent excessive current draw
• High-speed performance with balanced propagation delays and symmetrical output impedance

Applications

• Three-state memory address drivers
• Clock distribution circuits
• TTL-to-CMV level translation in mixed voltage environments
• PCI bus interface applications

Procurement Notes

Verify the specific ordering suffix 'MTR' corresponds to the Tape & Reel packaging format as indicated in the official STMicroelectronics order codes table. Confirm that the component meets RoHS compliance requirements for your region. Ensure the operating temperature range aligns with your system's thermal design specifications before finalizing procurement.

Selection Notes

Select this component when an octal buffer with three-state control is required for low-voltage digital systems. It is suitable for designs needing direct interfacing between 3.3V and 5V logic domains without additional level shifting components. Consider its power-down protection feature for systems requiring low standby current consumption during inactive states.

Part Context

This part belongs to the 74LVC244A family of low-voltage CMOS octal bus buffers. It is functionally compatible with the standard 74 Series 244 devices but offers improved speed performance and lower power consumption at 3.3V operation compared to traditional 5V AC/ACT families. The device is designed for high-performance digital applications requiring reliable signal buffering and isolation.

Replacement Considerations

Check for pin-compatible alternatives from other manufacturers such as NXP or ON Semiconductor that offer similar octal buffer functionality with three-state outputs. Verify that any substitute maintains the same 5V tolerance and operating voltage range to ensure compatibility with existing circuit designs.