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Product Detailed Parameters
- Description：IC SCREEN CNTRL 12BIT 24VCSP50L2
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Touchscreen：4 Wire Resistive
- Resolution (Bits)：12 b
- Interface：I2C, SPI
- Voltage Reference：-
- Voltage - Supply：2.7V ~ 3.6V
- Operating Temperature：-20°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：24-UFBGA, CSPBGA
- Supplier Device Package：24-VCSP50L2 (2.6x2.6)
- Current - Supply：120 µA
- Grade：-
- Qualification：-
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Overview
The BU21021GUL-E2 is a resistive touch screen controller manufactured by ROHM Semiconductor. It operates within a supply voltage range of 2.7 V to 3.6 V and consumes 4 mA of operating current. The device features a 12-bit resolution ADC with one input channel. Communication interfaces include I2C, SPI, 2-Wire, and 4-Wire serial protocols. It is housed in a VCSP-50L2 surface-mount package and functions within an ambient temperature range of -20°C to +85°C.
Feature Summary
- 12-bit resolution analog-to-digital conversion for precise touch coordinate detection
- Supports multiple interface modes including I2C, SPI, 2-Wire, and 4-Wire configurations
- Low power consumption with 4 mA operating current draw
- Compact VCSP-50L2 SMD/SMT packaging suitable for space-constrained designs
Applications
- Resistive touch screen systems in portable electronic devices
- Industrial control panels requiring reliable touch input
- Embedded human-machine interface (HMI) applications
Procurement Notes
The BU21021GUL-E2 carries an NRND (Not Recommended for New Designs) lifecycle status. Engineers should verify component availability and lead times through authorized distributors before initiating new projects. Existing designs may continue production, but future sourcing requires careful inventory management due to potential discontinuation risks.
Selection Notes
Select this component when a resistive touch solution with 12-bit accuracy is required. Ensure the host system supports the necessary I2C or SPI communication protocols. Verify that the 2.7 V to 3.6 V supply voltage aligns with the target application's power rails. The VCSP-50L2 package dimensions must fit the PCB layout constraints.
Part Context
This part belongs to the BU21021GUL series of touch screen controllers from ROHM Semiconductor. It is designed specifically for resistive touch applications, distinguishing it from capacitive touch controllers in the same product family. The E2 suffix typically indicates specific manufacturing or compliance variations within the series.
Replacement Considerations
Due to the NRND status, alternative components should be evaluated for long-term supply stability. Potential substitutes must match the 12-bit resolution, compatible interface protocols (I2C/SPI), and similar operating voltage ranges. Package compatibility with VCSP-50L2 footprint is essential for direct replacement.
