BU97981GU-ZE2

Display Drivers Overview

The BU97981GU-ZE2 is an LCD driver IC manufactured by ROHM Semiconductor, designed for segment-based liquid crystal displays. It supports up to 196 segments with selectable duty ratios of 1/4, 1/3, or static driving modes. The device operates on a low voltage interface ranging from 1.8V to 3.6V and powers the LCD at 3.3V to 5.5V. Key electrical specifications include a maximum clock frequency of 4 MHz, a maximum supply current of 130 uA, and power dissipation of 800 mW. It utilizes a 3-wire serial interface and is housed in a VBGA-64 package (VBGA064T050A). The component functions within a temperature range of -30°C to +75°C.

Display Drivers Feature Summary

• Supports flexible driving modes including 1/4, 1/3 duty, and static configurations for varying segment counts.
• Integrates dedicated blink RAM to support individual segment blinking functions without external memory.
• Includes integrated oscillation circuits for LCD frame frequency generation and internal LCD voltage driving.
• Features combined general-purpose outputs and LED drivers capable of supporting PWM illumination control.

Display Drivers Applications

• Segmented LCD modules requiring line or frame inversion driving
• Portable electronic devices utilizing low-power display interfaces
• Systems integrating LED backlighting with LCD segments

Display Drivers Procurement Notes

Verify the specific suffix ZE2 against the manufacturer's datasheet to confirm pinout compatibility and RoHS status. Ensure the VBGA-064T050A package dimensions align with your PCB footprint design. Confirm that the 3-wire interface timing requirements match your microcontroller's SPI or custom serial configuration. Check for any moisture sensitivity labeling if storage conditions are critical.

Display Drivers Selection Notes

Select this component when a compact VBGA package is required for high-density segment displays. It is suitable for applications needing integrated LED driver capabilities alongside LCD control. Consider the 1.8V to 3.6V interface voltage for compatibility with low-voltage logic systems. Evaluate the 130 uA supply current against total system power budgets for battery-operated devices.

Display Drivers Part Context

This part belongs to the BU97981 series of LCD drivers from ROHM Semiconductor. The series offers various package options such as VQFP and BGA variants to suit different board space constraints. The BU97981GU-ZE2 specifically denotes the VBGA package variant with the ZE2 suffix indicating specific manufacturing or compliance attributes defined by the manufacturer.

Display Drivers Replacement Considerations

The BU97981KV-E2 is a documented alternative in the same family, offering identical functional specifications but in a VQFP-64 package. Verify package footprint differences before substitution. Other BU9798GUW variants exist but may have different packaging or status classifications.