SN74ALS280N

Overview

The SN74ALS280N is a universal 9-bit parity generator/checker from the Texas Instruments ALS logic family. It features nine data inputs (A through I) and complementary outputs for odd and even parity. The device operates on a single supply voltage ranging from 4.5 V to 5.5 V, with an operating temperature range of 0°C to 70°C. It utilizes advanced Schottky circuitry and is housed in a standard 14-pin plastic DIP package.

Feature Summary

• Generates or checks parity for nine data lines using complementary outputs
• Cascadable architecture allows expansion for n-bit parity applications
• Compatible with existing MSI parity circuits without expander inputs

Applications

• Data transmission systems requiring error detection
• Memory modules utilizing parity checking
• Upgrading legacy systems based on SN74ALS180 or SN74AS180

Procurement Notes

Verify the specific ordering suffix 'N' corresponds to the 14-pin Plastic DIP package. Confirm that the component status aligns with current production requirements, as availability may vary. Ensure the selected variant meets the required operating temperature range and voltage specifications for the target application environment.

Selection Notes

Select this component when a 9-bit parity solution is required within the ALS logic family. It serves as a direct functional replacement for older MSI parity generators like the SN74ALS180. Consider cascading multiple units if word lengths exceed nine bits. Verify compatibility with system voltage levels and interface requirements before integration.

Part Context

This part belongs to the Texas Instruments 74ALS series, known for high-speed performance and low power consumption compared to standard TTL. The SN74ALS280 specifically addresses parity generation needs, offering a modern alternative to legacy components while maintaining pinout compatibility for design upgrades.

Replacement Considerations

The SN74ALS280 can substitute SN74ALS180 and SN74AS180 devices in existing designs by utilizing terminal 4 as an input and leaving terminal 3 unconnected internally.