MC74HCT244ADT

Overview

The MC74HCT244ADT is an octal buffer and line driver manufactured by onsemi, belonging to the HCT logic series. It features eight non-inverting inputs with three-state outputs, housed in a TSSOP-20 surface-mount package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 20 ns at 5 V, high-level output current of -6 mA, and low-level output current of 6 mA. Static current is specified at 4 uA, with a maximum operating temperature of +125 C and a minimum of -55 C.

Feature Summary

• Provides octal buffering with three-state output capability for bus-oriented systems
• Ensures compatibility with TTL-driven interfaces through HCT logic family standards
• Supports wide industrial temperature ranges for robust environmental operation

Applications

• Bus-oriented memory and address drivers
• Clock distribution buffers
• Signal routing between different logic domains

Procurement Notes

Verify the specific suffix 'DT' against official onsemi documentation to confirm the exact tape-and-reel packaging configuration and moisture sensitivity level. Ensure the ordering part number matches the required package variant and compliance certifications before finalizing procurement specifications.

Selection Notes

Select this component when an octal buffer with three-state control is required for 5V CMOS applications interfacing with TTL levels. Consider the TSSOP-20 package constraints and the 4.5V to 5.5V operating voltage window. Evaluate thermal performance requirements against the specified junction-to-ambient characteristics for the chosen board layout.

Part Context

This component belongs to the MC74HCT244A series of octal buffers. It serves as a standard interface solution for digital systems requiring signal isolation or driving capacity enhancement. The HCT series ensures backward compatibility with older TTL logic families while utilizing modern CMOS technology for power efficiency.

Replacement Considerations

Compatible alternatives include MM74HCT244MTC and MC74HCT244ADWG, provided pinout and electrical specifications match the design requirements.