L9660TR

Specialized ICS Overview

The L9660TR is a specialized interface IC manufactured by STMicroelectronics, designed as a quad squib driver ASIC for automotive safety applications. It deploys up to four squibs with SPI-selectable firing currents and times, supporting deployment of 1.2 A (min)/2 ms, 1.75 A (min)/1.0 ms, and 1.75 A (min)/0.65 ms between VRES of 7 V to 37 V. The device features a 5.5 MHz SPI interface, two fire enable inputs, and independent high-side/low-side MOS control for diagnostics. It operates within a voltage range of 4.9 V to 5.1 V, consumes 35 mA typical supply current, and withstands 2 kV ESD on all pins. Packaged in a 64-LQFP tape and reel.

Specialized ICS Feature Summary

• Quad deployment drivers with SPI selectable firing current and times
• Capability to deploy squibs with specified currents (1.2 A min/2 ms, 1.75 A min/1.0 ms, 1.75 A min/0.65 ms) between VRES of 7 V to 37 V
• Full diagnostic capabilities including squib short to ground/battery and MOS status via SPI register
• 2 kV ESD capability on all pins and 5.5 MHz SPI interface

Specialized ICS Applications

• Automotive safety systems requiring squib deployment
• Airbag control units
• Seatbelt pretensioner circuits

Specialized ICS Procurement Notes

Verify the L9660TR datasheet for complete electrical specifications and thermal characteristics before integration. Confirm that the 64-LQFP tape and reel packaging aligns with automated assembly requirements. Ensure design compliance with AEC-Q100 qualification standards if applicable to the target automotive environment. Check for any specific handling instructions related to moisture sensitivity level.

Specialized ICS Selection Notes

Select the L9660TR when a quad channel squib driver with precise SPI-controlled firing parameters is required. It supports simultaneous deployment of all channels and offers flexible firing profiles for different load conditions. The device includes analog output for resistance measurement and low-voltage internal reset. Consider the 64-LQFP package size and surface mount mounting type for board layout constraints.

Specialized ICS Part Context

The L9660 is part of STMicroelectronics' specialized interface IC portfolio, utilizing proprietary BCD5 (0.65μm) technology. It is designed for robust performance in harsh automotive environments, featuring full diagnostic coverage for the squib interface. The TR suffix indicates the component is supplied in a tape and reel format, suitable for high-volume surface mount manufacturing processes.

Specialized ICS Replacement Considerations

The L9660 is functionally similar to the L9662, which adds sensor interface capabilities. For direct replacement, verify pin compatibility and firmware configuration. No other public substitute part numbers are confirmed.