SN75468N-A

Overview

The SN75468N-A is a high-voltage Darlington transistor array manufactured by Texas Instruments. It integrates seven independent NPN Darlington pairs within a single package, designed for driving inductive loads such as relays and solenoids. The device supports a maximum collector-emitter voltage of 100V and a continuous collector current of 500mA per channel. It features built-in clamp diodes across each output to suppress voltage spikes during switching. The component is available in a 16-pin PDIP package and operates with a junction temperature rating up to 150°C.

Feature Summary

• Integrates seven independent NPN Darlington transistor pairs for multi-channel load control
• Includes internal clamp diodes on all outputs to protect against inductive kickback
• Supports high-voltage operation suitable for driving relays, solenoids, and lamps
• Designed for robust performance with a high junction temperature capability

Applications

• Driving automotive relays and solenoids
• Industrial control systems requiring multiple isolated load switches
• General-purpose high-voltage switching applications

Procurement Notes

Verify the specific suffix 'A' against the official Texas Instruments datasheet to confirm pinout compatibility and electrical specifications. Ensure the selected package variant matches the target PCB footprint requirements. Cross-reference the manufacturer part number with authorized distributors to confirm availability and authenticity before procurement.

Selection Notes

Select this component when designing circuits that require multiple high-voltage switches with integrated flyback protection. Consider the 500mA per channel limit and the total power dissipation capabilities of the 16-pin package. Evaluate thermal management needs if operating near maximum current ratings. Compare with similar arrays like the ULN2003 if lower voltage requirements suffice.

Part Context

The SN75468 belongs to the SN7546x series of Darlington transistor arrays from Texas Instruments. This series provides a compact solution for controlling inductive loads without external clamping components. The SN75468 specifically offers seven channels, distinguishing it from eight-channel variants or lower-density arrays in the same family.

Replacement Considerations

The ULN2003 is listed as a similar alternative. Verify voltage and current ratings carefully, as the ULN2003 typically has a lower maximum collector-emitter voltage compared to the 100V rating of the SN75468.