DIO4483BWL25

Overview

The DIO4483BWL25 is a USB Type-C analog audio switch IC manufactured by DIOO Microcircuits. It operates within a supply voltage range of 2.55 V to 5.5 V and features a 25-ball WLCSP package. The device supports OMTP, CTIA, and 3-pole headset standards with automatic pinout configuration. Key electrical parameters include a typical on-resistance of 1.2 Ω for the audio path and 4.6 Ω for the USB path. The USB switch provides a -3dB bandwidth of 950 MHz, while the audio switch offers 800 MHz bandwidth with a THD+N of -110 dB at 1 VRMS into a 32 Ω load. It includes overvoltage protection with configurable thresholds from 4.4 V to 5.0 V.

Feature Summary

• Integrates high-speed switches for USB 2.0 signals, analog audio, and UART data sharing common Type-C pins.
• Supports automatic detection and configuration of OMTP, CTIA, and 3-pole audio jack pinouts.
• Features built-in overvoltage protection with configurable trip points and ±20V DC tolerance on receptacle pins.
• Includes an ultra-low power comparator and I2C interface for control and status monitoring.

Applications

• Mobile phones
• Tablets
• Notebook PCs
• Media players

Procurement Notes

Verify the specific ordering suffix WL25 corresponds to the tape and reel packaging format containing 3000 units per reel. Confirm that the B variant default state matches the required DP_R and DN_L connection logic for your design. Ensure the WLCSP-25 footprint aligns with your PCB layout constraints before finalizing procurement orders.

Selection Notes

Select the DIO4483B version if the default configuration requires DP_R to connect to DP and DN_L to connect to DN without additional sideband connections. Verify that the 2.55 V minimum supply voltage meets your system's lowest operating condition. Consider the 1.2 Ω audio switch resistance and 950 MHz USB bandwidth when designing for high-fidelity audio and USB 2.0 compliance.

Part Context

This component belongs to the DIO4483 series of USB Type-C analog switches. The DIO4483B variant differs from the standard DIO4483 by its default switch configuration, specifically regarding the connection of DP_R and DN_L pins. Both variants share the same package, protection features, and core switching capabilities designed for portable multimedia devices.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin compatibility and electrical specifications against alternative USB Type-C switches if substitution is required.

FAQ

What is the default switch configuration for the DIO4483B compared to the DIO4483?

For the DIO4483B, the default configuration connects DP_R to DP and DN_L to DN. In contrast, the standard DIO4483 defaults to connecting DP_R to DP, DN_L to DN, SBU1 to SBU1_H, and SBU2 to SBU2_H.

How is the overvoltage protection threshold configured?

The OVP threshold is configurable via the I2C interface using register 0x12h. The threshold can be set to 4.4 V, 4.6 V, 4.8 V, or 5.0 V in 0.2 V steps.

Does the device support negative voltage rails for audio signals?

Yes, the audio switch supports a negative rail capability ranging from -3.6 V to +3.6 V, allowing it to handle bipolar analog audio signals without distortion.