74HC27D,653

Overview

The Nexperia 74HC27D,653 is a triple 3-input NOR gate manufactured by Nexperia USA Inc. It operates within a supply voltage range of 2.0 V to 6.0 V and features CMOS low power dissipation with high noise immunity. The device includes input clamp diodes for interfacing with voltages exceeding VCC. It provides latch-up performance exceeding 100 mA per JESD 78 Class II Level B and complies with JEDEC standards JESD8C and JESD7A. ESD protection exceeds 2000 V (HBM) and 1000 V (CDM). The component is specified for an ambient temperature range of -40 °C to +125 °C and is housed in a 14-lead SO plastic small outline package (SOT108-1).

Feature Summary

• Triple 3-input NOR logic function with push-pull outputs.
• Wide supply voltage operation from 2.0 V to 6.0 V.
• Input clamp diodes enable current limiting resistor usage for over-voltage interfacing.
• High noise immunity and robust latch-up performance.

Applications

• General digital logic processing requiring NOR functions.
• Mixed voltage environments utilizing input clamp diodes.
• Industrial applications operating within extended temperature ranges.

Procurement Notes

Verify the specific ordering suffix matches the required package type, as the 74HC27 family includes multiple options such as TSSOP and DHVQFN. Confirm that the procurement channel sources directly from authorized distributors to ensure compliance with RoHS and REACH regulations. Check the latest product data sheet revision for any updates to pinning or electrical characteristics before finalizing design-in specifications.

Selection Notes

Select the 74HC27D variant when a standard SO14 package is required for surface-mount assembly. Ensure the system supply voltage falls within the 2.0 V to 6.0 V range to maintain valid logic levels. Consider the 74HCT27 variant if TTL-compatible input levels are necessary for the application interface. Verify that the load capacitance requirements align with the dynamic propagation delay specifications provided in the datasheet.

Part Context

This component belongs to the 74HC series of high-speed CMOS logic devices produced by Nexperia. The 74HC27 specifically implements the triple 3-input NOR gate functionality. It is part of a broader family that includes variants like the 74HC27PW and 74HC27BQ, which offer alternative packaging solutions while maintaining identical logical operations and electrical performance profiles.

Replacement Considerations

Direct functional substitutes include the 74HCT27D,653 for TTL-level compatibility and other manufacturers' equivalents such as the MC74HC27ADG. Verify pinout compatibility and package dimensions when substituting with non-Nexperia parts to ensure mechanical fit on existing PCB layouts.

FAQ

What is the purpose of the input clamp diodes in the 74HC27?

The input clamp diodes allow the use of current-limiting resistors to interface inputs to voltages that exceed the supply voltage (VCC).

Does the 74HC27D support automotive applications?

No, unless explicitly stated otherwise in the data sheet, this product is not automotive qualified and is not suitable for automotive equipment or applications.