MAX4507CWN

Specialized ICS Overview

The MAX4507CWN is a fault-protected, high-voltage signal-line protector from the MAX4506/MAX4507 series. It contains eight independent two-terminal protectors in an 18-pin SOIC package. The device provides overvoltage protection up to ±36V with power on and ±40V with power off. It features rail-to-rail signal handling capability and operates with unipolar (+9V to +36V) or bipolar (±8V to ±18V) supplies. Key electrical parameters include a maximum on-resistance of 100Ω, matched within 7Ω, and on-leakage current less than 0.5nA at +25°C. The component ensures no latchup during power sequencing and maintains open signal paths when power is off.

Specialized ICS Feature Summary

• Overvoltage Protection: Handles ±40V with power off and ±36V with power on.
• Rail-to-Rail Signal Handling: Supports both unipolar and bipolar analog signals.
• Low On-Resistance: Maximum 100Ω, matched within 7Ω across channels.
• Latchup Immunity: No latchup occurs during power sequencing.

Specialized ICS Applications

• Process-Control Systems
• Hot-Insertion Boards/Systems
• Data-Acquisition Systems
• Redundant/Backup Systems
• ATE Equipment

Specialized ICS Procurement Notes

Verify the specific suffix 'CWN' corresponds to the commercial temperature range (0°C to +70°C) and 18-SOIC package as documented in the official datasheet. Confirm RoHS compliance status for the specific manufacturing batch. Check for any product change notices (PCN) regarding pin compatibility with industry-standard MAX366/MAX367 devices.

Specialized ICS Selection Notes

Select the MAX4507CWN when eight independent fault-protected channels are required in an 18-pin surface-mount package. Ensure the application voltage does not exceed ±36V during operation or ±40V when powered down. Verify that the supply rails can support the required output clamp current (typically 19mA) during fault conditions to maintain rail-to-rail outputs.

Specialized ICS Part Context

The MAX4507CWN belongs to the MAX4506/MAX4507 family of fault-protected signal-line protectors. It is pin-compatible with the industry-standard MAX366/MAX367. While the MAX4506 offers three protectors in smaller packages, the MAX4507 provides eight channels, available in 20-pin SSOP, 18-pin SO/DIP, and ceramic DIP variants.

Specialized ICS Replacement Considerations

The MAX4507CWN is pin-compatible with the MAX367. Designers replacing legacy MAX367 components should verify that the MAX4507's electrical characteristics, such as on-resistance and leakage current, meet the system requirements.

Specialized ICS FAQ

How does the MAX4507 handle overvoltage faults?

During a fault condition where input voltage exceeds supply rails, the input terminal becomes an open circuit with nanoampere leakage. The output clamps to the appropriate supply rail, furnishing typically 19mA to ensure unambiguous rail-to-rail outputs.

What is the maximum overvoltage rating with power off?

The input pins are protected from overvoltage faults up to ±40V with power off.

Can the MAX4507 be used with single-supply configurations?

Yes, it can protect unipolar and bipolar analog signals using either unipolar (+9V to +36V) or bipolar (±8V to ±18V) power supplies.