SN74HCT244PWE4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCT244PWE4 is an octal buffer and line driver manufactured by Texas Instruments, belonging to the HCT logic series. It features a TSSOP-20 package with surface mount installation. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a maximum static current of 8 uA and a typical propagation delay of 13 ns. Output drive capabilities are specified at ±6 mA. The component supports a wide operating temperature range from -40 °C to +85 °C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Configured as two independent 4-bit buffers or drivers with separate output enable inputs for flexible bus management.
• Provides three-state outputs that facilitate direct connection to bus lines and memory address registers without external resistors.
• Features TTL-compatible input levels, allowing seamless interfacing with standard TTL logic systems.

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address drivers in computer systems
• Clock signal distribution networks
• Bus-oriented receivers and transmitters

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance and RoHS status during procurement. Confirm the package type matches the required PCB footprint. Ensure the supply voltage aligns with the 4.5 V to 5.5 V operational range. Check for automotive qualification requirements if used in vehicle electronics, as standard versions differ from Q1 variants.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when TTL-level compatibility is required alongside CMOS low power consumption. It serves as a suitable replacement for older LS or ALS series devices where higher speed and lower power are needed. Consider the TSSOP-20 package constraints for board space. Evaluate the ±6 mA drive strength against load requirements to ensure signal integrity on long traces.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74HCT244 family of octal buffers. The 'E4' suffix typically denotes environmental compliance, specifically lead-free manufacturing and RoHS adherence, distinguishing it from standard commercial versions while maintaining identical functional specifications.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HCT244PWR is a direct functional substitute with identical electrical characteristics. SN74HCT244DW offers the same functionality in a SOIC-20 package. SN74HC244PWR provides similar buffering but operates on a wider voltage range (2V–6V) with different input thresholds.