MUX Switch for USB Type-C Audio Adapter Accessories

Description

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The MAX20328/MAX20328A/MAX20328B are USB Type-C audio interface ICs for use in portable devices. As USB Type-C and USB power delivery (PD) make a high-voltage charging solution readily available, the data and SBU lines are at risk of shorting to a high bus voltage, risking permanent damage to the portable device. USB 2.0 data lines also need protection when multiplexed with analog audio signals that vary from positive to negative voltages. The devices can detect a CC pin connection event to disable the microphone bias and eliminate pop up noise when an audio accessory is attached.

The MAX20328/MAX20328A/MAX20328B come in a 5 x 5 array, 25-bump, 0.4mm pitch, 2.31mm x 2.31mm wafer-level package (WLP).

Key Features

• Versatile and Flexible Switch Configurations
  • High-Speed USB Data or Audio Switch Paths
  • Automatic Impedance Detection in Audio Configurations
  • Full Manual Switch Control
  • Beyond-the-Rails™ Signal Capability
• Overvoltage Protected Data and Audio Channels
  • Two Separate OVLO Blocks
  • OVLO Threshold Programmable to 3.37V, 4.00V, 4.70V, or 5.00V
• Negative Voltage Capable Audio Channel
  • ±5V Audio Signals (Limited by Positive OVLO Threshold)
  • -100dB THD+N
  • -100dB PSRR at 217Hz
• High ESD and Surge-Protected USB Type-C Contacts
  • ±12kV HBM
  • ±25V Surge Capable on USB Type-C Pins
• Minimal Solution size
  • 5 x 5 Array, 0.4mm Pitch 2.31mm x 2.31mm WLP

Applications/Uses

• Phablets
• Smart Phones
• Tablet PCs