74HC7540D,118

Overview

The Nexperia 74HC7540D,118 is an octal Schmitt trigger buffer and line driver featuring inverting outputs with three-state capability. It operates within a supply voltage range of 2.0 V to 6.0 V and utilizes the SO-20 (SOT163-1) surface-mount package. The device incorporates two active-low output enable inputs (OE1 and OE2) to control high-impedance states. Propagation delay ranges from 20 ns at 6.0 V to 120 ns at 2.0 V under standard load conditions.

Feature Summary

• Schmitt-trigger inputs convert slowly changing signals into sharply defined jitter-free outputs
• Dual active-low output enables allow independent control of high-impedance OFF-states
• Input clamp diodes permit interfacing with voltages exceeding the supply rail using current limiting resistors

Applications

• High-noise immunity signal buffering in industrial environments
• Line driving for data transmission systems requiring inverting logic
• Bus interface circuits utilizing controlled three-state output management

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package type and temperature rating. Confirm RoHS compliance status and ensure the component matches the required JEDEC standards for your specific application environment before finalizing procurement orders.

Selection Notes

Select this component when designing circuits that require robust noise immunity through Schmitt-trigger action on eight parallel channels. Ensure the design accommodates the specified wide supply voltage range and verify that the SO-20 package dimensions fit the available PCB space constraints for the target assembly process.

Part Context

This part belongs to the 74HC series of CMOS logic devices manufactured by Nexperia. It functions as an octal buffer within the broader family of digital logic integrated circuits designed for general-purpose computing and signal processing applications across various electronic systems.

Replacement Considerations

The 74HCT7540D variant serves as a compatible alternative offering TTL-compatible input levels while maintaining identical pinout and functional characteristics.