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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

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_) fur-

nishes typically 19mA from the appropriate polarity sup-

ply to the load. This ensures unambiguous rail-to-rail

outputs when a fault begins and ends.

The MAX4506 contains three independent protectors

while the MAX4507 contains eight independent protec-

tors. 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 protec-

tors are designed to be always-on when the supplies

are on. On-resistance is 100

Ω max and matched within

7

The MAX4506 is available in 8-pin SO/DIP packages.

The MAX4507 is available in 20-pin SSOP and 18-pin

SO/DIP packages.

Applications

Process-Control Systems

Hot-Insertion Boards/Systems

Data-Acquisition Systems

Redundant/Backup Systems

ATE Equipment

Sensitive Instruments

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 100

Ω max On-Resistance

o 10ns Overvoltage Turn-On Delay

o No Latchup During Power Sequencing

o Rail-to-Rail Signal Handling

o 500

Ω Output Clamp Resistance During

Overvoltage

Fault-Protected, High-Voltage

Signal-Line Protectors

________________________________________________________________

Maxim Integrated Products

1

OUT2

OUT3

V-

1

2

8

7

V+

OUT1

IN2

IN3

IN1

SO/DIP

3

4

6

5

MAX4506

TOP VIEW

SWITCHED +15V

MAX4506

IN3

V-

-15V

V+

+15V

3

4

5

OUT3

IN2

26

OUT2

IN1

17

OUT1

8

P

100k

OP AMP

Typical Operating Circuit

19-1415; Rev 1; 8/99

PART

MAX4506ESA

MAX4506EPA

MAX4506MJA

-55°C to +125°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-PACKAGE

8 SO

8 Plastic DIP

8 CERDIP**

Ordering Information continued at end of data sheet.

*

Contact factory for dice specifications.

**

Contact factory for availability.

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

Pin Configurations continued at end of data sheet.

Pin Configurations

Ordering Information

MAX4506CPA

0°C to +70°C

8 Plastic DIP

MAX4506C/D

0°C to +70°C

Dice*

MAX4506CSA

0°C to +70°C

8 SO