74HC280D,652

Overview

The Nexperia 74HC280D,652 is a 9-bit odd/even parity generator and checker housed in an SO14 (SOT108-1) plastic small outline package. It operates within a supply voltage range of 2.0 V to 6.0 V for the HC variant. The device provides complementary even (PE) and odd (PO) parity outputs based on nine data inputs (I0 to I8). Static characteristics include input leakage currents up to ±1.0 μA at maximum voltage and supply currents up to 160 μA. Propagation delays from input to output range from 34 ns to 60 ns depending on voltage and temperature conditions.

Feature Summary

• Generates or checks both even and odd parity simultaneously for nine data bits
• Word length expansion capability through cascading parallel devices
• Input clamp diodes enable interfacing with voltages exceeding VCC using current limiting resistors
• High noise immunity and latch-up performance compliant with JESD 78 Class II Level B

Applications

• Data transmission systems requiring parity verification
• Memory modules utilizing error detection logic
• Digital communication interfaces needing word-length expansion

Procurement Notes

Verify the specific suffix '652' corresponds to the SO14 package configuration as defined in the ordering information table. Confirm that the required logic family matches the HC specifications rather than HCT, as electrical thresholds differ significantly between the two series. Ensure the design accounts for the specified operating temperature range and power dissipation derating curves provided in the datasheet.

Selection Notes

Select this component when a single IC must handle nine-bit parity generation or checking without external logic. Consider the wide supply voltage range suitable for various digital environments. Verify that the SO14 package dimensions fit the available PCB footprint. Compare propagation delay requirements against the specific voltage and load capacitance conditions listed in the dynamic characteristics table.

Part Context

This part belongs to the 74HC/HCT logic family, widely used for general-purpose digital applications. The 74HC280 specifically addresses parity functions, distinguishing it from standard buffers or gates. It complements other Nexperia logic components by providing dedicated error-checking capabilities in a compact surface-mount package suitable for modern electronic assemblies.

Replacement Considerations

The 74HCT280D,652 serves as a TTL-compatible alternative within the same package. Other variants like the 74HC280PW utilize a TSSOP14 package instead of SO14.