SN74LV244ATDW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LV244ATDW is an octal buffer and line driver manufactured by Texas Instruments, featuring non-inverting logic with three-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports mixed-mode voltage operation across all ports. The device is housed in a 20-pin SOIC package and functions as two independent 4-bit buffers, each controlled by a separate output-enable input. It exhibits TTL-voltage compatible inputs and includes circuitry for partial-power-down mode via the Ioff feature. Typical propagation delay is 5.4 ns at 5 V, with latch-up performance exceeding 250 mA per JESD 17 standards.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports partial-power-down mode operation through dedicated Ioff circuitry that disables outputs to prevent damaging backflow currents during power transitions.
• Enables mixed-mode voltage operation on all ports, allowing inputs and outputs to interface with different voltage domains simultaneously.
• Features TTL-voltage compatible inputs, facilitating direct interfacing with standard TTL logic levels without additional level shifting.

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address drivers
• Clock drivers
• Bus-oriented receivers and transmitters

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'DW' corresponds to the tube packaging format rather than tape-and-reel configurations like 'DWR'. Confirm the operating temperature range is restricted to -40°C to 85°C, which differs from industrial-grade variants extending to 125°C. Ensure design compliance with RoHS and lead-free material specifications prior to procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when a 5 V-only supply environment is required, as it does not support voltages below 4.5 V. Choose this part over wider-range LV series devices if strict compatibility with TTL input thresholds is necessary. Consider the 20-pin SOIC footprint constraints and verify that the 16 mA output drive capability meets the load requirements of the target bus architecture.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74LV244A family of octal buffers designed for high-density applications. While similar to the SN74LV244ADW, the 'AT' designation indicates a specific manufacturing lot or revision optimized for the 4.5 V to 5.5 V operational window. It shares functional pinouts with other octal buffers but is distinct in its specific electrical characteristics tailored for 5 V systems.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LV244ADW

Buffers, Drivers, Receivers, Transceivers FAQ

Does the SN74LV244ATDW support 3.3 V operation?

No, the SN74LV244ATDW is strictly specified for a supply voltage range of 4.5 V to 5.5 V. Devices supporting lower voltages such as 3.3 V belong to different series like SN74LVC244.

How does the Ioff feature function?

The Ioff circuitry automatically disables the outputs when the device is powered down, preventing damaging current backflow through the device into the power supply lines.