SN74HCT244PWG4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCT244PWG4 is an octal buffer and line driver manufactured by Texas Instruments, utilizing HCT CMOS technology. It features eight non-inverting outputs with three-state capability, organized into two independent four-bit sections. Each section includes a separate output enable (OE) input to control data flow from A inputs to Y outputs. The device operates within a supply voltage range of 4.5 V to 5.5 V. It provides high current drive capabilities, supporting up to 15 LSTTL loads, while maintaining low power consumption with a maximum quiescent current of 80 µA. The component is housed in a 20-pin TSSOP package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Three-state outputs allow connection to bus lines without interference when disabled
• HCT logic family ensures TTL voltage compatibility for direct interface with TTL signals
• Independent output enable controls isolate specific data sections on the bus
• High drive strength supports loading requirements of multiple standard TTL loads

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address drivers for three-state bus architectures
• Clock signal distribution and buffering
• Bus-oriented receivers and transmitters
• Buffering memory address registers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the complete part number including the G4 suffix to confirm RoHS compliance and lead-free status. Ensure the TSSOP-20 package variant matches the target PCB footprint. Confirm the HCT logic family aligns with system voltage levels, as HC variants differ in switching thresholds. Validate that the operating temperature range meets environmental specifications for the intended deployment scenario.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when TTL-compatible input thresholds are required alongside CMOS noise immunity. The HCT series bridges the gap between older TTL systems and modern CMOS designs. Consider the three-state feature for shared bus applications where multiple devices must share data lines. Evaluate the 6 mA drive current against load capacitance requirements to ensure signal integrity at desired clock speeds.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SNx4HCT244 family of octal buffers. It shares functional similarities with the SN74HC244 but differs in input threshold characteristics to support TTL interfacing. The G4 suffix indicates a green/RoHS-compliant manufacturing version. It serves as a standard solution for expanding bus capacity in digital logic circuits requiring reliable signal transmission and isolation.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HCT244PWR is a compatible reel-packaged alternative from Texas Instruments. SN74HCT244DWR offers the same functionality in a SOIC package. Cross-reference pinouts and electrical parameters before substituting to ensure mechanical and electrical compatibility.