BU91797MUF-ME2

Overview

The BU91797MUF-ME2 is an LCD segment driver manufactured by ROHM Semiconductor, designed for line/frame inversion driving. It supports up to 144 segments with a maximum clock frequency of 300 kHz. The device operates on a power supply voltage ranging from 2.5 V to 6 V and features a maximum power supply current of 30 uA. It utilizes an I2C interface and is housed in a VQFN-48 package. The component is qualified under AEC-Q100 standards and functions within a temperature range of -40°C to +105°C, with a power dissipation rating of 930 mW.

Feature Summary

• Supports high-precision VA LCD driving through integrated LCD voltage driving circuits and selectable line or frame inversion modes.
• Includes integrated display data RAM to reduce microcontroller load and eliminate the need for external components.
• Features wettable flanks on the QFN package to enhance soldering reliability and facilitate inspection of the mounting state.

Applications

• Automotive instrument clusters requiring AEC-Q100 Grade 2 compliance
• Vehicle interior displays utilizing VA (Vertical Alignment) liquid crystal technology
• General-purpose automotive LCD segment driver applications

Procurement Notes

Verify the specific suffix ME2 against official ROHM documentation to confirm pinout and packaging details. Ensure compatibility with the target system's I2C bus voltage levels and timing requirements. Confirm that the VQFN-48 footprint matches the PCB design, particularly noting the wettable flank specifications for automated optical inspection processes.

Selection Notes

Select this component when designing automotive displays that require support for high-contrast VA panels and robust operation across extended temperature ranges. It is suitable for systems needing reduced BOM complexity due to integrated RAM and oscillation circuits. Consider the VQFN-48 package size constraints and the necessity for AEC-Q100 qualification in safety-critical automotive environments.

Part Context

This part belongs to the BU9179x series of automotive-grade LCD drivers from ROHM. These devices are engineered specifically for vehicle applications, offering low power consumption and high reliability. The series supports various segment counts and duty cycles, catering to different display sizes and complexities found in modern automotive interiors.

Replacement Considerations

BU91797MUF-M is listed as an alias for this part number. Verify functional equivalence and package compatibility before substitution. No other direct cross-references are confirmed in the provided documentation.