SN74LS280DR

Overview

The SN74LS280DR is a 9-bit odd/even parity generator/checker from the Texas Instruments SN54LS280 family. It operates with a supply voltage range of 4.5 V to 5.5 V and features complementary outputs for both odd and even parity states. The device utilizes buffered inputs to reduce drive requirements. It is housed in a 14-pin SOIC package designed for surface-mount applications.

Feature Summary

• Generates or checks odd and even parity for nine data lines simultaneously
• Provides complementary outputs to facilitate either odd or even parity selection
• Features buffered inputs to lower drive requirements to one LS unit load

Applications

• Data transmission systems requiring error detection
• Memory systems utilizing parity checking
• Cascadable configurations for expanded word length parity generation

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status and ensure the component meets the required operating temperature range for the intended application environment before finalizing procurement.

Selection Notes

Select this component when a 9-bit parity solution is required within standard TTL logic families. Ensure the design accommodates the specified supply voltage limits and output drive capabilities. Consider cascading options if bit widths exceeding nine bits are necessary for the system architecture.

Part Context

This part belongs to the SN54/74LS280 series of universal 9-bit parity generators/checkers. It serves as a direct functional replacement for older MSI parity circuits like the LS180, offering improved performance characteristics while maintaining compatibility with standard low-power Schottky logic interfaces.

Replacement Considerations

The SN74LS280 can substitute for the SN74LS180 due to its compatible pinout and function. Verify that any alternative parity generator/checker maintains the 9-bit input capacity and complementary output structure required by the existing circuit design.