BU9794AKV-E2

Display Drivers Overview

The BU9794AKV-E2 is an LCD driver manufactured by ROHM Semiconductor, designed for segment-based liquid crystal displays. It supports up to 200 segments and operates within a supply voltage range of 2.5 V to 5.5 V. The device features a 3-wire serial interface and supports line or frame inversion driving modes. Key electrical specifications include a maximum clock frequency of 92 Hz, a maximum power supply current of 20 uA, and a power dissipation rating of 750 mW. It is housed in a QFP-64 package and functions reliably across an operating temperature range from -40°C to +85°C.

Display Drivers Feature Summary

• Integrates display data RAM to reduce microcomputer processing load
• Supports flexible line or frame inversion driving methods
• Includes integrated oscillation circuit for LCD frame frequency generation
• Features built-in EVR function for contrast adjustment

Display Drivers Applications

• Consumer electronic devices requiring segment LCD interfaces
• Industrial control panels with simple display requirements
• Household appliances utilizing low-pin-count LCD modules

Display Drivers Procurement Notes

Verify the specific suffix E2 against the manufacturer's latest datasheet to confirm compliance with current environmental directives and material declarations. Ensure the ordering quantity aligns with the factory packaging configuration specified in the official documentation. Confirm that the QFP-64 package dimensions match the target PCB footprint design constraints before finalizing procurement.

Display Drivers Selection Notes

Select this component when a 3-wire interface is preferred over I2C for segment LCD control. It is suitable for designs requiring integrated display RAM to minimize host processor overhead. Consider the 200-segment capacity and 2.5 V to 5.5 V operating range to ensure compatibility with the target display module and system power rails.

Display Drivers Part Context

This part belongs to the BU9794AKV series of standard LCD segment drivers from ROHM Semiconductor. These drivers are engineered for consumer applications, offering low power consumption through integrated circuits that eliminate the need for external components. The series supports various bias settings and mux configurations to accommodate different display densities.

Display Drivers Replacement Considerations

Consult the official ROHM replacement guide for verified substitutes. Cross-reference pinouts and electrical characteristics with alternative models such as those in the BU9799 series if interface differences are acceptable.