74LVC244ADB,118

Overview

The Nexperia 74LVC244ADB,118 is an octal buffer and line driver featuring 3-state outputs. It operates within a supply voltage range of 1.2 V to 3.6 V. The device contains two independent 4-bit buffers controlled by separate output enable inputs (1OE and 2OE). Inputs are overvoltage tolerant up to 5.5 V, allowing direct interfacing with 3.3 V or 5 V devices. It includes IOFF circuitry for partial power-down mode operation. Propagation delay ranges from 1.5 ns to 7.5 ns depending on voltage. Operating temperature spans -40 °C to +125 °C.

Feature Summary

• Octal buffer/line driver with 3-state outputs
• Overvoltage tolerant inputs up to 5.5 V
• IOFF circuitry for partial power-down protection
• Direct interface capability with TTL levels

Applications

• Mixed voltage translation between 3.3 V and 5 V systems
• Partial power-down applications requiring backflow current prevention
• Bus driver implementations in high-speed digital circuits

Procurement Notes

Verify the specific ordering suffix '118' corresponds to the SO20 plastic small outline package (SOT163-1) as defined in the official datasheet. Confirm that the required operating temperature range extends to +125 °C, which is specified for this variant. Ensure design compliance with the absolute maximum ratings regarding supply voltage and input clamping currents to prevent permanent damage during operation.

Selection Notes

Select this component when an 8-bit buffer with 3-state control is required for low-voltage logic families. The wide input voltage tolerance makes it suitable for translating signals between different logic domains without additional level shifting components. Consider the package dimensions and thermal dissipation characteristics if deploying in high-density surface-mount layouts.

Part Context

This part belongs to the 74LVC244A series of octal buffers. It shares functional similarities with other 74-series logic drivers but is optimized for low-voltage CMOS applications. The device provides non-inverting buffering functionality with distinct enable controls for each half of the octal bus, facilitating flexible system architecture designs.

Replacement Considerations

The 74LVCH244AD variant offers identical pinout and function but includes bus hold circuitry on all data inputs. Verify if the bus hold feature is necessary for the specific application before substituting.