19-1415; Rev 2; 2/03
Fault-Protected, High-Voltage
Signal-Line Protectors
The MAX4506 contains three independent protectors
while the MAX4507 contains eight independent protectors. They can protect both unipolar and bipolar analog
signals using either unipolar (+9V to +36V) or bipolar
(±8V to ±18V) power supplies.
These devices have no logic control inputs; the protectors are designed to be always-on when the supplies
are on. On-resistance is 100Ω max and matched within
7Ω, and on-leakage is less than 0.5nA at TA = +25°C.
The MAX4506 is available in 8-pin SO/DIP packages.
The MAX4507 is available in 20-pin SSOP and 18-pin
SO/DIP packages.
Features
o Overvoltage Protection
±40V with Power Off
±36V with Power On
o Open Signal Paths with Power Off
o Output Clamps to Either Rail with an Input
Overvoltage
o Any On Channel Output is Not Affected
by an Overvoltage to Any Other Channel
o 100Ω max On-Resistance
o 10ns Overvoltage Turn-On Delay
o No Latchup During Power Sequencing
o Rail-to-Rail Signal Handling
o 500Ω Output Clamp Resistance During
Overvoltage
Ordering Information
PART
TEMP RANGE
MAX4506CSA
0°C to +70°C
8 SO
MAX4506CPA
0°C to +70°C
8 Plastic DIP
MAX4506C/D
0°C to +70°C
Dice*
Process-Control Systems
MAX4506ESA
-40°C to +85°C
8 SO
Hot-Insertion Boards/Systems
MAX4506EPA
MAX4506MJA
-40°C to +85°C
-55°C to +125°C
8 Plastic DIP
8 CERDIP**
Applications
Data-Acquisition Systems
PIN-PACKAGE
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
**Contact factory for availability.
Redundant/Backup Systems
ATE Equipment
Sensitive Instruments
Pin Configurations
Typical Operating Circuit
SWITCHED +15V
TOP VIEW
P
MAX4506
V+
+15V
8
1 IN1
OUT2 6
3 IN3
OUT3 5
4
8
V+
7
OUT1
3
6
OUT2
V- 4
5
OUT3
IN2 2
OUT1 7
2 IN2
IN1 1
MAX4506
100k
IN3
OP AMP
V-
SO/DIP
-15V
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX4506/MAX4507
General Description
The MAX4506/MAX4507 multiple, two-terminal signal-line
protectors are pin-compatible with the industry-standard
MAX366/MAX367. These new circuit protectors feature
fault-protected inputs and Rail-to-Rail® signal handling
capability. The input pins are protected from overvoltage
faults up to ±36V with power on or ±40V with power off.
During a fault condition, the input terminal becomes an
open circuit and only nanoamperes of leakage current
flow from the source; but the switch output (OUT_) furnishes typically 19mA from the appropriate polarity supply to the load. This ensures unambiguous rail-to-rail
outputs when a fault begins and ends.
