BU21023GUL-E2

Overview

The BU21023GUL-E2 is a resistive touchscreen controller manufactured by ROHM Semiconductor. It features an 8-bit resolution and supports multiple interface protocols including I2C, serial, and SPI. The device operates within a supply voltage range of 2.7V to 3.6V and consumes 4mA of operating current. Designed for surface-mount installation, it utilizes a VCSP50L2 package. The component functions as a data converter IC within the broader sensors category, providing touch input digitization for embedded systems.

Feature Summary

• Supports 4-wire resistive touchscreen input with 8-bit ADC resolution
• Compatible with I2C, Serial, and SPI communication interfaces
• Operates on a single power supply between 2.7V and 3.6V
• Available in compact VCSP-50L2 surface-mount packaging

Applications

• Portable electronic devices requiring resistive touch input
• Embedded control panels with limited interface pins
• Industrial human-machine interfaces (HMIs)
• Consumer electronics utilizing low-power touch controllers

Procurement Notes

This component is classified as obsolete or not recommended for new designs. Verification of current manufacturing status and end-of-life notifications is required before procurement. Availability may be restricted to distributor surplus stocks rather than direct manufacturer production. Confirm RoHS compliance details through official documentation prior to integration.

Selection Notes

Select this part only if legacy compatibility with 8-bit resolution and specific interface requirements is necessary. Compare against newer models offering higher resolution or alternative packages if designing new hardware. Ensure the system voltage aligns with the 2.7V to 3.6V operational range. Verify that the VCSP-50L2 footprint matches the PCB layout constraints.

Part Context

The BU21023GUL-E2 belongs to the BU21023 series of touchscreen controllers from ROHM Semiconductor. It serves as a specialized integrated circuit for converting analog touch signals into digital data via supported serial protocols. The device is categorized under data converters and sensors, targeting applications where cost-effective resistive touch solutions are prioritized over capacitive alternatives.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult ROHM Semiconductor technical support for updated recommendations or cross-reference with similar 8-bit resistive touch controllers if redesigning.