74HCT7540N,112

Overview

The 74HCT7540N,112 is an octal Schmitt trigger buffer and line driver manufactured by Nexperia. It features inverting outputs with three-state capability controlled by two active-low output enable inputs (OE1 and OE2). The device operates within a supply voltage range of 4.5 V to 5.5 V and supports ambient temperatures from -40 °C to +125 °C. Inputs include clamp diodes for interfacing with voltages exceeding VCC. The component utilizes TTL input levels and provides high noise immunity with unlimited rise and fall times.

Feature Summary

• Octal configuration with Schmitt-trigger inputs for jitter-free signal transformation
• Three-state outputs managed by dual active-low enable controls
• TTL-compatible input levels ensuring direct interface with standard logic families
• Integrated input clamp diodes allowing safe operation with current-limiting resistors

Applications

• High-speed data bus buffering applications
• Line driving for communication interfaces
• Clock distribution networks requiring noise immunity
• Memory address and data bus drivers

Procurement Notes

Verify the specific ordering suffix '112' against the manufacturer's current production status, as availability may vary. Confirm that the package type matches the required PCB footprint, specifically checking for the PDIP-20 variant associated with this part number. Ensure design compliance with the specified operating temperature range and supply voltage limits before finalizing procurement.

Selection Notes

Select this component when designing systems requiring eight-channel buffering with significant noise rejection capabilities. The HCT series designation indicates compatibility with TTL logic thresholds, making it suitable for mixed-voltage environments. Consider the dual enable pins for complex bus arbitration schemes where independent control of output states is necessary for system stability.

Part Context

This component belongs to the 74HC/HCT7540 family of octal buffers. It shares functional similarities with other members like the 74HC7540 but differs in input threshold specifications. The NXP/Nexperia portfolio includes various package options such as SO20 and TSSOP20, though this specific part number denotes the through-hole PDIP configuration.

Replacement Considerations

Direct substitutes include the 74HC7540D,112 for CMOS-level input requirements. Verify pinout compatibility and electrical characteristics before swapping between HC and HCT variants to ensure proper logic level translation.