BU97931FV-E2

Display Drivers Overview

The BU97931FV-E2 is an LCD segment driver manufactured by ROHM Semiconductor, designed for industrial applications. It supports up to 112 segments with selectable duty ratios of 1/4, 1/3, or static bias. The device operates on a supply voltage range of 1.8 V to 3.6 V for the interface and 2.7 V to 5.5 V for the LCD power supply. It features a 3-wire serial interface and integrates an oscillation circuit for frame frequencies up to 73 Hz. The component is housed in an SSOP-B40 package and functions within a temperature range of -40°C to +85°C.

Display Drivers Feature Summary

• Supports selectable driving modes including 1/4 duty (max 112 segments), 1/3 duty (max 84 segments), and static bias (max 28 segments).
• Integrates dedicated blink RAM to support individual segment blinking functions without microcontroller intervention.
• Includes an integrated LCD voltage driving circuit and internal oscillation circuit for frame frequency generation.
• Provides five general-purpose outputs and one LED driver channel capable of supporting 256-step PWM illumination.

Display Drivers Applications

• Industrial equipment displays requiring long-term product support
• TN/STN liquid crystal display panels
• Automotive and AV device instrumentation

Display Drivers Procurement Notes

Verify the specific suffix against official documentation to confirm functional variations. Confirm that the SSOP-B40 package dimensions align with PCB layout requirements. Ensure the operating temperature range meets the environmental specifications of the target application. Cross-reference the 3-wire interface timing parameters with the host controller capabilities before integration.

Display Drivers Selection Notes

Select this component when designing systems requiring high segment counts with low microcontroller overhead. The integrated blink RAM and internal oscillator reduce external component count. Verify compatibility between the 1.8 V to 3.6 V interface voltage and the host logic levels. Consider the 2.7 V to 5.5 V LCD supply requirement for power budget calculations.

Display Drivers Part Context

This part belongs to the BU97931FV series of LCD segment drivers from ROHM Semiconductor. It is categorized as a standard-grade driver IC suitable for general-purpose and industrial use. The series is known for low current consumption and strong electromagnetic interference immunity, addressing common requirements in compact display modules.

Display Drivers Replacement Considerations

BU97931FV-LB is listed as a related variant within the same family. Verify pinout and electrical parameter equivalence before substitution. Note that some variants may have different status classifications regarding new design recommendations.