SN74AS286D

Overview

The SN74AS286D is a parity generator and checker integrated circuit manufactured by Texas Instruments. It belongs to the 74AS logic series and supports 9-bit data processing within a single circuit configuration. The device operates on a single power supply ranging from 4.5 V to 5.5 V. It features a high-level output current of -400 uA and a low-level output current of 48 mA. Propagation delay is specified at 10 ns. The component functions across an operating temperature range of 0°C to +70°C and is housed in a 14-SOIC package.

Feature Summary

• Performs parity generation and checking for 9-bit data streams
• Utilizes AS logic series technology for defined switching speeds
• Provides standard TTL-compatible voltage operation levels

Applications

• Data transmission error detection systems
• Memory unit parity verification circuits
• Digital communication interface integrity checks

Procurement Notes

Verify the specific manufacturer part number against official Texas Instruments documentation to confirm availability status. Ensure the 14-SOIC package dimensions match the target PCB footprint requirements. Confirm that the 4.5 V to 5.5 V supply voltage aligns with the system design specifications before finalizing procurement decisions.

Selection Notes

Select this component when a dedicated 9-bit parity solution is required within the AS logic family. Consider the 10 ns propagation delay relative to system clock speeds. Evaluate the 48 mA low-level sink capability against load requirements. Verify compatibility with existing 74AS series logic levels in the design architecture.

Part Context

This device is part of the broader 74AS (Advanced Schottky) logic family, which offers improved speed over standard TTL while maintaining similar pinouts. The SN74AS286D specifically addresses parity functions, distinct from other family members like NAND gates or multiplexers. It serves as a specialized digital logic block for data integrity applications.

Replacement Considerations

The DM74AS286M from onsemi is documented as a direct substitute. Verify pinout compatibility and electrical characteristics between the TI and onsemi versions before implementation.