Products
MAX9940
PRODUCTIONSignal-Line Overvoltage Protector for Low-Voltage Devices
Protects Low-Voltage Devices Using Sensitive Communication Protocols
- Part Models
- 2
- 1ku List Price
- Starting From $0.80
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Overview
- 28V Protection on EXT
- Extended ESD Protection
- ±4kV IEC 61000-4 Contact on EXT
- +2.2V to +5.5V Supply Voltage Range
- 13µA Quiescent Supply Current
- 60ns Fault Reaction Time
- Small, 5-Pin SC70
- -40°C to +125°C Temperature Range
The MAX9940 signal-line overvoltage protector for low-voltage digital communication ports provides protection against high-voltage faults and ESD strikes. The MAX9940 is especially useful for sensitive communication protocols such as Maxim 1-Wire® that cannot afford standard means of fault protection, such as large series resistors or large line capacitances.
The MAX9940 operates from a single supply voltage of +2.2V to +5.5V and consumes only 13µA of quiescent supply current. The EXT port is protected up to 28V. The device features a reaction time of 60ns for fast action during fault conditions and operates over the -40°C to +125°C automotive temperature range.
Applications
- Industrial Equipment
- Notebook Computers
- Portable Devices
Documentation
Data Sheet 1
Design Note 1
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX9940AXK+ | SC70 | ||
| MAX9940AXK+T | SC70 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571 PIN/ERRATA |
||
| MAX9940AXK+ | PRODUCTION | |
| MAX9940AXK+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
Evaluation Kits
Evaluation Kit for the MAX9940
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