74HCT244D,652

Overview

The Nexperia 74HCT244D,652 is an octal buffer and line driver featuring three-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL input levels. The device provides non-inverting buffering for eight channels, divided into two groups controlled by separate output enable inputs (1OE and 2OE). It includes input clamp diodes for interfacing with voltages exceeding VCC. The component is specified for operation from -40 °C to +125 °C and complies with JEDEC standards JESD8C and JESD7A.

Feature Summary

• Octal bus interface with non-inverting three-state outputs
• TTL input switching levels compatible with standard logic families
• Dual independent output enables controlling four outputs each
• Input clamp diodes allow current limiting resistor usage for overvoltage interfacing

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transmissions

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status and lead times directly with authorized distributors or Nexperia sales offices prior to procurement.

Selection Notes

Select this component when designing systems requiring octal buffering with high noise immunity and low power dissipation. Ensure the application environment remains within the recommended operating temperature range of -40 °C to +125 °C. Verify that the system voltage aligns with the 4.5 V to 5.5 V supply requirement for HCT logic compatibility.

Part Context

This part belongs to the 74HCT series of CMOS logic devices manufactured by Nexperia. It serves as a digital buffer designed for general-purpose applications in computing and industrial control systems. The D package variant utilizes a plastic small outline package with 20 leads, suitable for surface-mount assembly on printed circuit boards.

Replacement Considerations

Direct functional equivalents include the 74HC244D for CMOS input levels or other 74HCT244 variants from Nexperia such as the PW or BQ package options. Cross-family replacements require verification of input threshold compatibility.