SG2803J-DESC

Overview

The SG2803J-DESC is a high-reliability NPN Darlington transistor array manufactured by Microchip Technology. It integrates eight driver pairs within a single component, designed for medium-current applications requiring robust performance in severe environments. The device features open collector outputs capable of handling up to 500 mA DC collector current with a minimum breakdown voltage of 50 V. It operates across an extended temperature range from -55°C to +125°C and utilizes a hermetic 18-pin ceramic dual in-line package (CDIP). This configuration ensures compatibility with standard logic families while providing the durability necessary for critical systems.

Feature Summary

• Integrates eight NPN Darlington pairs with internal suppression diodes for driving inductive loads such as relays and solenoids
• Features open collector outputs with high breakdown voltages exceeding 50 V and significant current carrying capabilities
• Designed with inputs compatible with DTL, TTL, PMOS, or CMOS drive signals for versatile interfacing
• Constructed in a hermetic ceramic package suitable for military, aerospace, and industrial applications

Applications

• Military and aerospace systems requiring high reliability and radiation tolerance
• Industrial control circuits driving lamps, relays, and solenoids in severe environments
• Interfaces requiring compatibility with DTL, TTL, PMOS, or CMOS logic families

Procurement Notes

Verify the specific DESC suffix requirements against official Microchip documentation to ensure compliance with intended environmental and reliability standards. Confirm that the hermetic CDIP-18 package meets the mechanical constraints of the target assembly. Cross-reference the JAN2803J designation if MIL-STD-883 compliance is required for the procurement process.

Selection Notes

Select this component when designing circuits that demand high current switching capabilities combined with robust thermal stability. The integrated Darlington structure simplifies driver design by eliminating external base resistors. Ensure the load voltage does not exceed the specified breakdown limits and that the operating environment remains within the defined temperature range for optimal performance.

Part Context

This part belongs to the SG2800 series of high-voltage medium-current driver arrays. The series includes variants like SG2801J, SG2802J, and SG2804J, which share similar architectural features but may differ in pin configurations or specific electrical ratings. The SG2803J-DESC specifically denotes a version processed under DESC specifications, indicating adherence to strict quality and reliability protocols for defense and space applications.

Replacement Considerations

Publicly confirmed substitute part numbers include SG2803J and SG2803J-JAN. Verify pinout compatibility and electrical parameter equivalence before substitution. The JAN variant typically implies MIL-STD-883 processing, which may offer enhanced reliability compared to the standard commercial grade.