L9680TR

Specialized Overview

The L9680TR is a specialized interface integrated circuit designed for advanced airbag systems and cut-off battery applications in safety markets. It features family compatibility with the L9678 and L9679 devices, enabling high-power supply currents and an integrated active wheel speed sensor interface shared with the PSI-5 satellite interface. The device incorporates a boost regulator operating at 1.882 MHz with a maximum load current of 70 mA. The output voltage is user-selectable between 23 V and 33 V with ±5% tolerance. It supports ECU logic voltages of 3.3 V or 5.0 V and limits deployment voltage to a maximum of 25 V.

Specialized Feature Summary

• Integrated active wheel speed sensor interface compatible with PSI-5 satellite systems
• High-frequency switching regulators at 1.882 MHz reduce external component costs
• Built-in circuits for ER capacitor charge control, discharge, and ESR measurement
• Direct battery connection capability managed by internal state machine

Specialized Applications

• Advanced airbag systems for mature automotive markets
• Cut-off battery systems for integrated safety applications
• Remote safety sensor interfaces compliant with multiple protocols

Specialized Procurement Notes

Verify the specific suffix TR indicates reel packaging when sourcing. Confirm AEC-Q100 qualification status aligns with project requirements. Check for recent product change notifications regarding the L9660 series compatibility. Ensure design reviews account for the specified 23 V or 33 V energy reserve outputs.

Specialized Selection Notes

Select this component for designs requiring integration of wheel speed sensing with airbag deployment logic. Consider the 1.882 MHz operation for minimizing passive component size. Evaluate the need for 3.3 V versus 5.0 V ECU logic levels during system architecture planning. Verify that the 25 V maximum deployment voltage meets safety constraints.

Specialized Part Context

The L9680 belongs to the STMicroelectronics L9660 family of smart power interface ICs. It shares functional similarities with the L9678 and L9679, focusing on safety-critical automotive applications. The device integrates power management and sensor interfacing to simplify system architecture for airbag controllers.

Specialized Replacement Considerations

The L9678 and L9679 are documented as family-compatible alternatives. Verify pinout and feature parity before substitution. No other public substitute part numbers are confirmed.