L9805E

Overview

The L9805E is a Super Smart Power device integrating an ST7 8-bit microcontroller with a DMOS H-bridge driver, designed for automotive resistive and inductive load control. It features a 64-pin HiQUAD package, operating within a 6.4V to 18V supply range and -40°C to +150°C temperature scope. Key internal resources include 16 Kbytes of user EPROM/OTP, 256 bytes of data RAM, and 128 bytes of Data EEPROM. The MCU supports up to 16 MHz oscillator frequency and includes peripherals such as two 16-bit timers, a 10-bit ADC, CAN transceiver, ISO 9141 interface, and a software watchdog.

Feature Summary

• Integrates an ST7 8-bit microcontroller with dedicated registers for direct power bridge control via software.
• Includes a low-resistance 70mΩ DMOS H-bridge for driving high-current loads.
• Provides comprehensive automotive communication interfaces including CAN and ISO 9141 transceivers.
• Features integrated analog-to-digital conversion and multiple timer modules for precise pulse generation.

Applications

• Automotive engine management systems
• Fuel injection control units
• Ignition coil drivers
• Solenoid actuation circuits

Procurement Notes

Verify the NRND (Not Recommended for New Designs) status before initiating any new development projects. Confirm that the 64-pin HiQUAD footprint matches your PCB layout requirements. Ensure compatibility with the specified 6.4V to 18V input voltage range for your target application environment. Review the latest datasheet for any pinout revisions or thermal handling guidelines specific to the SMD/SMT installation style.

Selection Notes

Select this component when a combined MCU and motor driver solution is required to reduce board space and component count. It is suitable for applications needing integrated CAN and ISO 9141 communication alongside high-side switching capabilities. Consider the 16 Kbytes program memory limit for complex control algorithms. Verify that the 70mΩ H-bridge resistance meets the thermal dissipation requirements for your specific load current and duty cycle.

Part Context

The L9805E belongs to STMicroelectronics' Super Smart Power family, which combines logic and power technologies on a single chip. This series targets automotive mechatronic applications requiring robust control and drive capabilities. The integration of the ST7 core allows for flexible software implementation of control strategies without external processing units.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the NRND status, alternative components should be evaluated based on pin compatibility, electrical specifications, and functional equivalence. Consult official STMicroelectronics channels for current portfolio recommendations.