74HCT244BQ,115

Overview

The Nexperia 74HCT244BQ,115 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 an ambient temperature range from -40 °C to +125 °C. The device contains two independent four-bit buffers controlled by separate active-low output enable inputs (1OE and 2OE). It utilizes TTL input logic levels and provides non-inverting signal transmission with high-impedance OFF-states when disabled.

Feature Summary

• Features two independent output enables for controlling eight three-state outputs
• Accepts TTL-level input signals for compatibility with standard logic families
• Includes clamp diodes on inputs to allow interfacing with voltages exceeding VCC

Applications

• Octal bus interface systems
• Memory and memory address buffering
• Clock drivers and bus-oriented transmissions

Procurement Notes

Verify the specific suffix 'BQ' corresponds to the DHVQFN20 package variant during procurement. Confirm that the ordering code includes ',115' to ensure correct reel packaging specifications. Cross-reference the manufacturer part number against official Nexperia documentation to validate production status and current datasheet revision before finalizing orders.

Selection Notes

Select this component when TTL-compatible input thresholds are required for 5 V applications. Choose this part over HC variants if strict TTL logic level compatibility is necessary. Ensure the design accommodates the thermal requirements of the DHVQFN20 package for operation up to +125 °C. Verify that the dual-enable architecture fits the system's bus control requirements.

Part Context

This component belongs to the 74HCT series of CMOS logic devices manufactured by Nexperia. It is functionally similar to the 74HC244 but differs in input threshold characteristics to support TTL logic levels. The BQ suffix indicates the use of the leadless DHVQFN20 package, which is designed for surface-mount applications requiring compact board space.

Replacement Considerations

Direct replacements include other 74HCT244 variants in different packages such as the SO20 or TSSOP20 versions. Verify pinout compatibility and electrical specifications when substituting with equivalent parts from other manufacturers.