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MAX20328, MAX20328A, MAX20328B

MUX Switch for USB Type-C Audio Adapter Accessories

OVP and Surge Protected Audio Accessory Switch for USB Type-C

Product Details

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
Parametric specs for Overvoltage Protection Controllers
VIN (V) (min) 2.7
VIN (V) (max) 5.5
Over Voltage Trip Level (V) Adjustable
Under Voltage Lockout (V) 2.4
Oper. Temp. (°C) -40 to +85
Package/Pins WLP/25
Budgetary
Price (See Notes)
$1.44 @1k
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Simplified Block Diagram

MAX20328, MAX20328A: Block Diagram MAX20328, MAX20328A: Block Diagram Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX20328A evaluation kit (EV kit) is a fully assembled and tested circuit for evaluating theMAX20328/ MAX20328A/MAX20328B MUX switch for USB-C audio adapter applications. The device features automatic MIC-GND orientation and headphone impedance detection, Beyond-the-Rails™ signal capability, and surge protection on pins attached to the USB-C connector. This EV kit enables fast and easy evaluation of the MAX20328/ MAX20328A/MAX20328B switches in USB-C audio applications.

The EV kit is populated with MAX20328A. The MAX20328, MAX20328A, and MAX20328B are pin-to-pin and register compatible. Users can install their own MAX20328 for evaluation.

View Details

Features

  • Automatic MIC/GND Orientation Detection
    • MIC Line Bias Check Safeguards Against Shorting MIC to GND
  • 3.5mm Audio Jack for Testing with Audio Signals
  • Onboard USB Receptacles for Passing and Measuring Data Signals
  • Proven PCB Layout
  • Fully Assembled and Tested

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Support & Training

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Parameters

Parametric specs for Overvoltage Protection Controllers
VIN (V) (min) 2.7
VIN (V) (max) 5.5
Over Voltage Trip Level (V) Adjustable
Under Voltage Lockout (V) 2.4
Oper. Temp. (°C) -40 to +85
Package/Pins WLP/25
Budgetary
Price (See Notes)
$1.44 @1k

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

Description

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).

Simplified Block Diagram

MAX20328, MAX20328A: Block Diagram MAX20328, MAX20328A: Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal