MAX366 Maxim, MAX366 Datasheet
MAX366
Manufacturer Part Number
MAX366
Description
Signal-Line Circuit Protectors
Manufacturer
Maxim
Datasheet
1.MAX366.pdf
(12 pages)
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The MAX366 and MAX367 are multiple, two-terminal circuit
protectors. Placed in series with signal lines, each two-ter-
minal device guards sensitive circuit components against
voltages near and beyond the normal supply voltages.
These devices are used at interfaces where sensitive cir-
cuits are connected to the external world and could
encounter damaging voltages (up to 35V beyond the sup-
ply rails) during power-up, power-down, or fault conditions.
The MAX366 contains three independent protectors and
the MAX367 contains eight. They can protect analog sig-
nals using either unipolar (4.5V to 36V) or bipolar (±2.25V
to ±18V) power supplies. Each protector is symmetrical.
Input and output terminals may be freely interchanged.
These devices are voltage-sensitive MOSFET transistor
arrays that are normally on when power is applied and
normally open circuit when power is off. With ±10V sup-
plies, on-resistance is 100Ω max and leakage is less than
1nA at +25°C.
When signal voltages exceed or are within approximately
1.5V of either power-supply voltage (including when
power is off), the two-terminal resistance increases dra-
matically, limiting fault current as well as output voltage to
sensitive circuits. The protected side of the switch main-
tains the correct polarity and clamps approximately 1.5V
below the supply rail. There are no “glitches” or polarity
reversals going into or coming out of a fault condition.
Process Control Systems
Hot-Insertion Boards/Systems ATE Equipment
Data-Acquisition Systems
________________________Applications
19-0326; Rev 0; 12/94
Call toll free 1-800-998-8800 for free samples or literature.
___________________________________________________Typical Operating Circuit
_______________General Description
REMOTE SENSOR
________________________________________________________________ Maxim Integrated Products
Redundant/Backup Systems
Sensitive Instruments
+10V REG.
FAULT!
FAULT!
Signal-Line Circuit Protectors
(OPEN)
(SHORT)
ELECTRONICS
____________________________Features
† MAX367 available after January 1, 1995.
* Dice are tested at T
* Contact factory for availability.
Pin Configurations appear at end of data sheet.
+28V
______________Ordering Information
MAX366CPA
MAX366CSA
MAX366C/D
MAX366EPA
MAX366ESA
MAX366MJA
MAX367CPN
MAX367CWN
MAX367C/D
MAX367EPN
MAX367EWN
MAX367MJN
±40V Overvoltage Protection
Open Signal Paths with Power Off
100Ω Signal Paths with Power On
1nA Max Path Leakage at +25°C
44V Maximum Supply Voltage Rating
Automatic Protection; No Programming or
Controls
1
2
3
4
PART †
IN1
IN2
IN3
V-
PROTECTOR
MAX366
A
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
TEMP. RANGE
= +25°C only.
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
OUT1
OUT2
OUT3
V+
7
6
5
8
AMPLIFIER
SENSITIVE
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP**
18 Plastic DIP
18 Wide SO
Dice*
18 Plastic DIP
18 Wide SO
18 CERDIP**
+12V
1
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