74HCT7540D,112

Overview

The Nexperia 74HCT7540D,112 is an octal Schmitt trigger buffer and line driver featuring inverting outputs with three-state capability. It operates within a supply voltage range of 4.5 V to 5.5 V and utilizes the SO20 plastic small outline package (SOT163-1). The device includes two active LOW output enable inputs (OE1 and OE2) that force outputs into a high-impedance state when asserted HIGH. Inputs incorporate clamp diodes for overvoltage tolerance, while Schmitt-trigger action ensures jitter-free signal conversion.

Feature Summary

• Features dual active LOW output enables for independent control of the three-state logic levels
• Incorporates Schmitt-trigger inputs to transform slowly changing signals into sharply defined outputs
• Includes input clamp diodes allowing interface to voltages exceeding the supply rail using current limiting resistors

Applications

• Memory address buffering
• Clock distribution circuits
• Bus-oriented transmissions

Procurement Notes

Verify the specific ordering suffix '112' corresponds to the tube packaging format rather than tape-and-reel variants. Confirm the HCT logic family designation matches the required 5 V TTL-compatible input thresholds for the target system design.

Selection Notes

Select this component when designing systems requiring eight-channel data buffering with noise immunity provided by Schmitt triggers. Ensure the application environment remains within the specified -40 °C to +125 °C temperature range and adheres to the 500 mW total power dissipation limits for the SO20 package.

Part Context

This part belongs to the 74HCT series of logic integrated circuits manufactured by Nexperia. It serves as the HCT-compliant variant of the 74HC7540, specifically optimized for operation at standard 5 V logic levels while maintaining CMOS low power dissipation characteristics.

Replacement Considerations

The 74HC7540D,112 is functionally compatible but requires verification of input threshold levels against the 74HCT7540D,112. Direct pin-for-pin replacements include other manufacturers' 74HCT7540 equivalents in SOIC-20 packages.