Signal-Line Overvoltage Protector
19-4168; Rev 0; 2/09
Signal-Line Overvoltage Protector for Low-Voltage Devices
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General Description...
Description
19-4168; Rev 0; 2/09
Signal-Line Overvoltage Protector for Low-Voltage Devices
www.datasheet4u.com
General Description
♦ 28V Protection on EXT ♦ Extended ESD Protection ±4kV IEC 61000-4 Contact on EXT
Features
MAX9940
The MAX9940 signal-line overvoltage protector for lowvoltage 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.
♦ +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
Applications
Notebook Computers Portable Devices Industrial Equipment
PART MAX9940AXK+
Ordering Information
TEMP RANGE -40°C to +125°C PINPACKAGE 5 SC70 TOP MARK ATC
+Denotes a lead(Pb)-free/RoHS-compliant package.
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
Block Diagram/Typical Application Circuit
NOTEBOOK VDD = 3.3V ADAPTER
LOAD
NOTEBOOK BATTERY CHARGER
ENABLE
VCC
MAX9940 MICROCONTROLLER 2kΩ + PROTECTION CIRCUIT...
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