MAX9940AXK+T Maxim Integrated Products, MAX9940AXK+T Datasheet

IC OVERVOLTAGE PROTECTOR SC70-5

MAX9940AXK+T

Manufacturer Part Number
MAX9940AXK+T
Description
IC OVERVOLTAGE PROTECTOR SC70-5
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX9940AXK+T

Voltage - Working
5.5V
Voltage - Clamping
28V
Technology
Mixed Technology
Power (watts)
245mW
Number Of Circuits
1
Applications
General Purpose
Package / Case
SC-70-5, SC-88A, SOT-323-5, SOT-353, 5-TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MAX9940AXK+T
MAX9940AXK+TTR
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
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.
19-4168; Rev 0; 2/09
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Notebook Computers
Portable Devices
Industrial Equipment
MICROCONTROLLER
Rx
V
Tx
DD
= 3.3V
ENABLE
________________________________________________________________ Maxim Integrated Products
DATA
General Description
2kΩ
INT
Signal-Line Overvoltage Protector
Applications
®
that cannot
NOTEBOOK
P
N
Block Diagram/Typical Application Circuit
+
-
for Low-Voltage Devices
PROTECTION
V
LOAD
CIRCUIT
CC
♦ 28V Protection on EXT
♦ Extended ESD Protection
♦ +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
+ Denotes a lead(Pb)-free/RoHS-compliant package.
MAX9940AXK+
MAX9940
GND
±4kV IEC 61000-4 Contact on EXT
PART
EXT
NOTEBOOK
CHARGER
BATTERY
-40°C to +125°C
TEMP RANGE
Ordering Information
PACKAGE
DEVICE
1-Wire
5 SC70
PIN-
ADAPTER
Tx
Features
Rx
20V
MARK
TOP
ATC
1

Related parts for MAX9940AXK+T

MAX9940AXK+T Summary of contents

Page 1

... 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. Notebook Computers Portable Devices Industrial Equipment 1-Wire is a registered trademark of Maxim Integrated Products, Inc 3.3V DD ENABLE MICROCONTROLLER 2kΩ ...

Page 2

Signal-Line Overvoltage Protector for Low-Voltage Devices ABSOLUTE MAXIMUM RATINGS (All voltages with respect to GND.) V ...........................................................................-0.3V to +6V CC INT ............................................................................-0.3V to +6V EXT .........................................................................-0.3V to +30V Continuous Input Current into Any Terminal.....................±20mA Stresses beyond those listed under “Absolute ...

Page 3

Signal-Line Overvoltage Protector (V = +3.3V 2kΩ INT_PULLUP DD ON-RESISTANCE ...

Page 4

Signal-Line Overvoltage Protector for Low-Voltage Devices (V = +3.3V 2kΩ INT_PULLUP DD FAULT TURN-ON TIME EXT 5V/div 0 INT 2V/div 0 TIME (100ns/div) FAULT TURN-ON AND RECOVERY TIME (SCHOTTKY DIODE FROM INT TO V EXT ...

Page 5

... EXT External Connector Port. Connection to a 1-Wire device. Detailed Description The MAX9940 is a signal-line overvoltage protector for low-voltage devices that provides circuit protection from high-voltage faults and ESD strikes. The device provides protection in digital communication lines such 2 as 1-Wire and I C protocols where large series resis- ...

Page 6

Signal-Line Overvoltage Protector for Low-Voltage Devices MICROCONTROLLER Rx Tx Figure 1. Recommended Scheme for Battery-Operated Devices that Need to Shut Down the MAX9940 and Prevent Power Draw During Short to GND Faults In all three schemes, the MAX9940 protects the ...

Page 7

Signal-Line Overvoltage Protector MICROCONTROLLER Rx Tx Figure 2. Recommended Scheme for Applications that Require the MAX9940 to be Put into Shutdown MICROCONTROLLER Rx Tx Figure 3. Recommended Operating Circuit for Nonbattery-Operated Applications _______________________________________________________________________________________ for Low-Voltage Devices V = 3.3V DD ...

Page 8

Signal-Line Overvoltage Protector for Low-Voltage Devices Pin Configuration TOP VIEW + MAX9940 GND 2 N.C. 3 SC70 8 _______________________________________________________________________________________ PROCESS: BiCMOS 5 EXT 4 INT Chip Information ...

Page 9

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9 © 2009 Maxim Integrated Products ...

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