74HCT240PW,118

Overview

The Nexperia 74HCT240PW,118 is an octal buffer and line driver featuring inverting 3-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V and accepts TTL-level inputs. The device contains two independent output enable inputs (1OE and 2OE), each controlling four outputs. It is housed in a 20-lead TSSOP plastic thin shrink small outline package (SOT360-1) and is specified for ambient temperatures from -40 °C to +125 °C.

Feature Summary

• Features inverting 3-state outputs controlled by dedicated active LOW enable signals.
• Accepts TTL logic level inputs for compatibility with standard digital systems.
• Includes input clamp diodes to facilitate interfacing with voltages exceeding the supply rail.

Applications

• Bus-oriented memory and address drivers
• Clock drivers and buffer circuits
• Multiplexer receivers

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature rating. Confirm compliance with RoHS directives and REACH regulations before integration. Ensure the design accounts for the absolute maximum ratings to prevent permanent damage during operation or storage.

Selection Notes

Select this component when TTL-compatible inputs are required alongside high-noise immunity and low power dissipation. The dual enable structure allows flexible partitioning of the eight outputs. Verify that the TSSOP20 package dimensions align with the target PCB layout constraints.

Part Context

This part belongs to the 74HCT series, which bridges CMOS technology with TTL input levels. It shares functional similarities with the 74HC240 but differs in input threshold specifications. The PW suffix indicates the TSSOP20 package variant, distinct from SO20 or leadless QFN options available in the same family.

Replacement Considerations

The 74HC240PW,118 serves as a compatible alternative if CMOS input thresholds are acceptable. Other manufacturers producing JEDEC-compliant octal buffers may offer pin-compatible substitutes, provided electrical characteristics meet the system requirements.