74HC244D,653

Overview

The Nexperia 74HC244D,653 is an octal buffer and line driver featuring non-inverting 3-state outputs. It operates within a supply voltage range of 2.0 V to 6.0 V and utilizes CMOS technology for low power dissipation. The device contains two output enables (1OE and 2OE), each controlling four outputs. It includes input clamp diodes for interfacing with voltages exceeding VCC. The component is housed in a SOIC-20 package (SOT163-1) and supports an operating temperature range from -40 °C to +125 °C.

Feature Summary

• Features two independent output enable inputs to control eight 3-state outputs
• Includes input clamp diodes allowing interface to voltages higher than the supply rail
• Provides high noise immunity and low power consumption typical of CMOS logic
• Complies with JEDEC JESD7A standards for operation across the full voltage range

Applications

• Octal bus interface systems
• Clock drivers and buffer circuits
• Memory address and data register buffering

Procurement Notes

Verify the specific ordering suffix matches the required package type, as the 74HC244 family is available in multiple configurations including TSSOP and DHVQFN. Confirm that the D suffix corresponds to the SOIC-20 package variant required for your PCB layout. Ensure compliance with RoHS directives and check REACH status if restricted substances are a concern for your manufacturing process.

Selection Notes

Select this component when an octal buffer with tri-state capability is required for bus applications. The wide supply voltage range allows compatibility with various logic families. Consider the 74HCT244 variant if TTL-level input thresholds are necessary instead of standard CMOS levels. Verify that the thermal performance of the SOIC-20 package meets the power dissipation requirements of the target application.

Part Context

This part belongs to the Nexperia 74HC/HCT244 series of octal buffers. The 'D' suffix indicates the SOIC-20 plastic small outline package. The '653' suffix typically denotes tape and reel packaging. This series is designed for general-purpose digital logic applications requiring signal buffering and isolation on high-speed buses.

Replacement Considerations

The 74HC244PW is a pin-compatible alternative using the TSSOP20 package. The 74HC244BQ offers a leadless DHVQFN option. For TTL-compatible inputs, the 74HCT244D provides equivalent functionality with different input threshold characteristics.