CD74HCT244M

Overview

The CD74HCT244M is an octal buffer and line driver manufactured by Texas Instruments, belonging to the HCT logic series. It features eight non-inverting inputs and outputs housed in a SOIC-20 package. 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 µA and a working power supply current of 80 µA. Output drive capabilities are specified at -6 mA for high level and 6 mA for low level. The component supports a minimum operating temperature of -55 °C.

Feature Summary

• Configured as two independent four-bit buffers with separate output enable controls
• Provides tri-state outputs to facilitate bus-oriented connections
• Compatible with TTL voltage input levels

Applications

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

Procurement Notes

Verify the specific lifecycle status before procurement, as official records indicate this part may be obsolete or subject to discontinuation. Confirm that the SOIC-20 package variant matches the design requirements. Ensure compatibility with the intended operating temperature range of -55 °C minimum. Cross-reference the manufacturer number against current Texas Instruments documentation to validate availability and final purchase suitability.

Selection Notes

Select this component when designing systems requiring octal buffering with tri-state control capabilities. The HCT technology ensures compatibility with standard TTL logic families while offering CMOS performance characteristics. Consider the wide operating temperature range if the application involves harsh environments. Verify that the package dimensions fit the available board space constraints.

Part Context

This device is part of the broader SN74HCT244 family of octal buffers. While other variants like the SN74HCT244DBR utilize SSOP-20 packages and the SN74HCT244PWR uses TSSOP-20, the CD74HCT244M specifically utilizes the SOIC-20 form factor. All variants share similar electrical specifications but differ in physical packaging and potentially thermal characteristics.

Replacement Considerations

Direct substitutes include SN74HCT244DWR and MC74HCT244ADWR2G. Verify pinout compatibility and package differences before substitution.