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Analog Devices Inc./Maxim Integrated MAX20331EWL+
- Part No.:
- MAX20331EWL+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized ICs
- Package:
- 9-WFBGA, WLBGA
- Description:
- IC OVERVOLTAGE PROT CTRL 9WLP
- Quantity:
Unit Price:$0
Ext Price:$0
- Payment:
- Shipping:
Product Details
MAX20331EWL+ - Audio-Line Overvoltage Protection IC
Two-channel overvoltage protection for 3.5 mm audio paths in a 9-bump wafer-level package.
Technical values and bump functions are based on Analog Devices' MAX20331/MAX20331A Rev. 0 data sheet and the MAX20331 product page. Verify the current controlled documents before design release.
Overview
The MAX20331EWL+ is the MAX20331 variant of a two-channel audio-line overvoltage protection device. It is placed between an external 3.5 mm audio connection and sensitive codec circuitry. Under an overvoltage condition, the device opens the affected COM-to-NC signal path. Its COM inputs tolerate voltages up to ±40 V, while the MAX20331 version uses nominal positive and negative trip thresholds of ±3.45 V.
Key Advantages
High-voltage input tolerance
COM audio inputs are specified for protection against external high-voltage events up to ±40 V.
Audio-path protection
Disconnects codec-side NC outputs from the external lines when the overvoltage threshold is crossed.
Compact footprint
9-bump, 3 × 3 WLP measures approximately 1.23 mm × 1.23 mm with 0.4 mm bump pitch.
Portable-device fit
Designed for smartphone and tablet audio connector protection.
Feature Summary
Two protected channels
COM1-to-NC1 and COM2-to-NC2 paths serve two external audio lines.
Supply range
The MAX20331 operates from 1.6 V to 5.5 V.
Operating temperature
Specified from −40 °C to +85 °C.
Package option
The EWL+ ordering code identifies the lead-free 9-bump WLP version.
Package & Footprint
The manufacturer specifies a 9-bump, 0.4 mm-pitch wafer-level package measuring approximately 1.23 mm × 1.23 mm. The catalog's “9-WFBGA, WLBGA” label is a generic description; use the manufacturer WLP drawing for land-pattern and assembly decisions.
- Verify the 3 × 3 bump orientation against the official top-view drawing.
- Place VCC decoupling and the VN capacitor close to the device.
- Confirm land pattern, solder mask, and assembly rules from the controlled package drawing.
The local package JPG is missing. This content is not cleared for publication until the resource is supplied and checked.
Pin Functions
The following bump assignments follow the official 9-bump top-view description.
Verify bump numbering and the board-view mirror before routing.
Key Specifications
| Function | Two-channel audio-line overvoltage protection |
|---|---|
| COM input tolerance | ±40 V |
| Nominal trip threshold | ±3.45 V (MAX20331) |
| Supply voltage | 1.6 V to 5.5 V |
| Operating temperature | −40 °C to +85 °C |
| Package | 9-bump WLP, 0.4 mm pitch, approximately 1.23 mm × 1.23 mm |
Typical values are not guaranteed limits. Consult the official electrical-characteristics table for design margins.
Replacement Considerations
No internal replacement is asserted here. Before substituting any part, compare protection thresholds, supply range, audio-path performance, bump map, package geometry, and qualification requirements. The MAX20331A family has a different protection threshold and is not automatically interchangeable.
Manufacturer Information
MAX20331EWL+ is a Maxim Integrated ordering code presented by Analog Devices. The manufacturer lists this exact code as a 9-WLP option.
Official references: MAX20331 product page and MAX20331/MAX20331A Rev. 0 data sheet.
Applications
Smartphones
Protection between a 3.5 mm headset connector and audio codec inputs.
Tablets
Compact two-line overvoltage protection in portable audio interfaces.
Quality & Authenticity
Confirm the full ordering code, package marking, lot traceability, and packaging against the manufacturer's controlled documentation and the received material. The “+” suffix denotes a lead-free/RoHS-compliant package in the manufacturer data sheet.
FAQ
What does MAX20331EWL+ protect?
It isolates two codec-side audio lines from an overvoltage applied at the external connector.
Is MAX20331A a drop-in equivalent?
Not by assumption. Its nominal overvoltage threshold and minimum supply differ; verify the complete design requirements.
Can the generic catalog package name define the land pattern?
No. Use the manufacturer's package drawing for the exact WLP footprint.
Engineering Notice
Check absolute maximum ratings, electrical limits, ESD strategy, connector topology, and package drawing in the current manufacturer documents. The local package image is currently unavailable; do not treat this draft as publication-ready.
MAX20331EWL+ Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 9-WFBGA, WLBGA
- Packaging:
- Strip
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Overvoltage Protection Controller
- Applications:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-WLP (1.23x1.23)
- Grade:
- -
- Qualification:
- -
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