74LVC240ADB,112

Overview

The Nexperia 74LVC240ADB,112 is an octal buffer and line driver featuring inverting logic with three-state outputs. It operates within a supply voltage range of 1.2 V to 3.6 V and supports inputs up to 5.5 V for mixed-voltage interfacing. The device includes IOFF circuitry to prevent backflow current during partial power-down states. It utilizes Schmitt-trigger inputs to tolerate slow signal transitions. The component is housed in a 20-lead SO plastic small outline package (SOT163-1) and is specified for operation across temperatures from -40 °C to +125 °C.

Feature Summary

• Provides two independent output enable controls for managing eight three-state outputs.
• Features overvoltage tolerant inputs compatible with 5 V devices while operating at lower voltages.
• Includes dedicated IOFF circuitry to disable outputs and eliminate damaging backflow currents when powered down.
• Incorporates Schmitt-trigger action on all inputs to ensure stability against slow rise and fall times.

Applications

• Mixed 3.3 V and 5 V environment translation
• Partial power-down system configurations
• Signal buffering and line driving

Procurement Notes

Verify the specific ordering suffix to confirm the package type matches the design requirements. Confirm that the required temperature range aligns with the -40 °C to +125 °C specification. Ensure input voltage levels do not exceed the 5.5 V tolerance limit. Check for any recent product change notices regarding pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when an octal inverting buffer with three-state capability is required. It is suitable for applications needing direct interface between TTL levels and CMOS logic. Consider the wide supply voltage range if the system operates across multiple voltage domains. Verify that the package dimensions fit the available PCB space constraints.

Part Context

This part belongs to the 74LVC240A family of octal buffers. The 'ADB' designation specifically identifies the 20-lead SOIC package variant. Other variants in the series include TSSOP and DHVQFN packages. The device is manufactured by Nexperia USA Inc. and complies with relevant JEDEC standards for low-voltage CMOS logic.

Replacement Considerations

Check for other 74LVC240A variants with different package options such as TSSOP or QFN if physical footprint changes are acceptable. Verify functional compatibility with other manufacturers' octal buffers offering similar voltage tolerances and three-state outputs.