74LVC240AD,118

Overview

The Nexperia 74LVC240AD,118 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 includes IOFF circuitry for partial power-down mode operation. The device utilizes Schmitt-trigger inputs to tolerate slow rise and fall times. It is housed in a 20-lead SO plastic small outline package (SOT163-1) with a body width of 7.5 mm.

Feature Summary

• Features two independent output enable inputs controlling four 3-state outputs each
• Includes IOFF circuitry to disable outputs and prevent backflow current during power-down
• Inputs are tolerant to voltages up to 5.5 V, allowing direct interfacing with 5 V devices

Applications

• Translating signals between mixed 3.3 V and 5 V environments
• Driving capacitive loads on buses or transmission lines
• Providing isolated buffering for microprocessor address and data lines

Procurement Notes

Verify the ordering suffix matches the required package type, as the AD suffix specifically denotes the SO20 variant. Confirm that the application environment remains within the specified temperature range of -40 °C to +125 °C. Ensure input voltage limits do not exceed the absolute maximum ratings to prevent permanent damage to the semiconductor junctions.

Selection Notes

Select this component when an octal inverting buffer with high noise immunity via Schmitt triggers is required. The 5 V tolerance feature makes it suitable for bridging different logic families without additional level shifting components. Consider the specific thermal derating requirements associated with the SO20 package if operating near maximum ambient temperatures.

Part Context

This part belongs to the 74LVC240A family of octal buffers. While other variants like the APW exist in TSSOP packages, the AD suffix identifies the standard SO20 form factor. The device shares functional characteristics with non-inverting counterparts but provides logical inversion for signal routing applications requiring phase reversal.

Replacement Considerations

The 74LVC240APW,118 serves as a functional substitute utilizing a TSSOP20 package instead of the SO20 configuration.