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MAX9940AXKT,MAX9940AXKT,MAX9940AXKT,MAX9940EVKIT,规格书,Datasheet资料
General Description
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 communica-
tion 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
Notebook Computers
Portable Devices
Industrial Equipment
Features
? 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
M
A
X
9
9
4
0
Signal-Line Overvoltage Protector
for Low-Voltage Devices
________________________________________________________________ Maxim Integrated Products 1
19-4168; Rev 0; 2/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at .
NOTEBOOK ADAPTER
MICROCONTROLLER
EXT
GND
INT
1-Wire
DEVICE
2kΩ
20V
+
-
N
PROTECTION
CIRCUIT
ENABLE
VCC
DATA
P
NOTEBOOK
BATTERY
CHARGER
LOAD
VDD = 3.3V
MAX9940
Rx
Tx
Rx
Tx
Block Diagram/Typical Application Circuit
Ordering Information
PART TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX9940AXK+ -40°C to +125°C 5 SC70 ATC
+Denotes a lead(Pb)-free/RoHS-compliant package.
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
芯天下--/
M
A
X
9
9
4
0
Signal-Line Overvoltage Protector
for Low-Voltage Devices
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Rati
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