BU9799KV-E2

Display Drivers Overview

The BU9799KV-E2 is a 200-segment LCD driver IC from ROHM Semiconductor, housed in a VQFP-64 package. It operates on a supply voltage range of 2.5V to 5.5V with a maximum power consumption of 750 mW and standby current under 20 uA. The device supports I2C interface communication and features an integrated display data RAM of 50 x 4 bits. It accommodates 1/4 duty driving with selectable 1/3 or 1/2 bias settings. The component functions within a temperature range of -40°C to +85°C and includes built-in oscillation circuits and EVR for contrast adjustment.

Display Drivers Feature Summary

• Integrates 50 x 4-bit display data RAM to reduce microcomputer load
• Supports line or frame inversion driving modes via two-wire serial interface
• Includes integrated LCD voltage driving circuit and oscillation circuit
• Features EVR function for adjustable LCD contrast without external components

Display Drivers Applications

• Segmented LCD displays requiring low power consumption
• Consumer electronics with space-constrained designs
• Battery-operated devices utilizing 2.5V to 5.5V logic interfaces

Display Drivers Procurement Notes

Verify the specific suffix E2 against official ROHM documentation to confirm compliance with RoHS standards and lead-free manufacturing processes. Confirm that the VQFP-64 package dimensions match the target PCB footprint requirements. Ensure the selected variant supports the required 1/4 duty and 1/3 or 1/2 bias configurations for the specific LCD panel being driven. Check humidity sensitivity handling instructions prior to assembly.

Display Drivers Selection Notes

Select this component when designing systems requiring a dedicated driver for up to 200 segments with minimal external circuitry. The integrated RAM and oscillation circuit simplify design complexity compared to non-integrated solutions. Consider the I2C interface compatibility with the host controller. Evaluate the thermal performance within the specified -40°C to +85°C operating range to ensure reliability under expected environmental conditions.

Display Drivers Part Context

This part belongs to the BU9799KV series of standard LCD segment drivers by ROHM. These drivers are engineered for applications ranging from 80 to 280 segments. The series emphasizes energy efficiency through low operating currents and reduced peripheral component counts. The BU9799KV-E2 specifically denotes the version compatible with modern environmental regulations and surface-mount assembly techniques.

Display Drivers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify cross-compatibility with other ROHM BU97xx series variants only if datasheet specifications for pinout, electrical parameters, and functionality are identical.