74AC244MTR

Buffers, Drivers, Receivers, Transceivers Overview

The STMicroelectronics 74AC244MTR is an octal bus buffer with non-inverted 3-state outputs, fabricated using sub-micron silicon gate and double-layer metal wiring C2MOS technology. It operates within a supply voltage range of 2V to 6V. At VCC = 5V, the typical propagation delay (tPD) is 3.8ns, with maximum values reaching 9.5ns across the -55°C to 125°C temperature range. The device provides symmetrical output impedance with minimum drive currents of |IOH| = IOL = 24mA at VCC = 5V. Quiescent supply current (ICC) is maximized at 80μA at 125°C. Input capacitance is 4pF, output capacitance is 8pF, and power dissipation capacitance is 21pF.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus buffer architecture with two independent groups of four buffers controlled by separate enable inputs.
• Advanced high-speed CMOS fabrication ensuring balanced propagation delays and low power dissipation.
• Enhanced noise immunity with input thresholds defined as a percentage of the supply voltage.
• Robust protection circuits against static discharge providing ESD immunity.

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transmissions

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify component status carefully, as this specific part number may be classified as obsolete. Confirm availability through authorized distributors or secondary markets if active stock is required. Ensure that any replacement components maintain pin compatibility and electrical specifications suitable for the original design requirements.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring high-speed data buffering in mixed-voltage environments. The wide operating voltage range supports interfaces between different logic families. Consider the 3-state capability for efficient bus management. Evaluate thermal performance given the specified leakage and dynamic current parameters under varying load conditions.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the 74AC series of advanced CMOS logic devices. It is functionally and pin-compatible with standard 74-series equivalents but offers superior speed and lower power consumption. The MTR suffix indicates a tape and reel packaging format suitable for automated surface-mount assembly processes.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check for direct replacements from other manufacturers offering the same 74AC244 specification. Verify that alternative sources provide identical package dimensions and pin configurations to ensure seamless integration without PCB redesign.

Buffers, Drivers, Receivers, Transceivers FAQ

What controls the state of the outputs?

The outputs are controlled by two separate Output Enable inputs (G), which manage two distinct groups of four buffers each.

Is the device compatible with TTL levels?

Yes, the device features high noise immunity and input thresholds that allow it to interface effectively with various logic standards, including TTL-compatible signals.