MAX366CSA+ Datasheet MAX367EWN+T, MAX366ESA+, MAX366CSA+ | P1-P3

_______________General Description

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.

________________________Applications

Process Control Systems Redundant/Backup Systems

Hot-Insertion Boards/Systems ATE Equipment

Data-Acquisition Systems Sensitive Instruments

____________________________Features

♦ ±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

______________Ordering Information

MAX366/MAX367

Signal-Line Circuit Protectors

________________________________________________________________

Maxim Integrated Products

MAX366

OUT1

SENSITIVE

AMPLIFIER

FAULT!

IN1

(SHORT)

(OPEN)

REMOTE SENSOR

ELECTRONICS

+28V

+12V

OUT22 IN2 6

OUT33 IN3 5

V+

V-

PROTECTOR

+10V REG.

___________________________________________________Typical Operating Circuit

Call toll free 1-800-998-8800 for free samples or literature.

19-0326; Rev 0; 12/94

PART

†

MAX366CPA

MAX366CSA

MAX366C/D 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

8 Plastic DIP

8 SO

Dice*

MAX366EPA

MAX366ESA

MAX366MJA -55°C to +125°C

-40°C to +85°C

-40°C to +85°C 8 Plastic DIP

8 SO

8 CERDIP**

MAX367CPN

MAX367CWN

MAX367C/D 0°C to +70°C

0°C to +70°C

0°C to +70°C 18 Plastic DIP

18 Wide SO

Dice*

MAX367EPN

MAX367EWN

MAX367MJN -55°C to +125°C

-40°C to +85°C

-40°C to +85°C 18 Plastic DIP

18 Wide SO

18 CERDIP**

Pin Configurations appear at end of data sheet.

†

MAX367 available after January 1, 1995.

* Dice are tested at T

= +25°C only.

* Contact factory for availability.

MAX366/MAX367

Signal-Line Circuit Protectors

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V+ = +15V, V- = -15V, T

= T

MIN

to T

MAX

, unless otherwise noted.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Note 1: Guaranteed, but not tested.

Note 2: See

Typical Operating Characteristics

curves for fault-free analog signal range at various supply voltages.

V+ to V-......................................................................-0.3V, +44V

IN_, OUT_..................................................(V- + 44V), (V+ - 44V)

Continuous Current into Any Terminal..............................±30mA

Peak Current into Any Terminal

(pulsed at 1ms, 10% duty cycle)...................................±70mA

Continuous Power Dissipation (T

= +70°C)

8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ....727mW

8-Pin SO (derate 5.88mW/°C above +70°C).................471mW

8-Pin CERDIP (derate 8.00mW/°C above +70°C).........640mW

18-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ...889mW

18-Pin Wide SO (derate 9.52mW/°C above +70°C) .....762mW

18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW

Operating Temperature Ranges

MAX36_C_ _ ........................................................0°C to +70°C

MAX36_E_ _......................................................-40°C to +85°C

MAX36_M_ _...................................................-55°C to +125°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

V+ = V- = 0V, V

OUT

= 0V,

= ±35V

V+ = 15V, V- = -15V (Note 2)

(Note 1)

V+ = 10V, V- = -10V, V

= ±5V,

OUT

= 1mA

= ±10V, I

OUT

= 1mA

= V+ or V-,

100kΩ < R

OUT

< 1000MΩ (Note 1)

V+ = 15V, V- = -15V, V

= ±10V,

OUT

= 1mA

V+ = 5V, V- = -5V, V

= ±2V,

OUT

= 1mA

CONDITIONS

-10 10

IN(OFF)

Signal-Path Leakage

(with Overvoltage)

Ω

∆R

(IN-OUT)

Signal-Path Resistance Match

Ω

400

(IN-OUT)

Analog-Signal-Path Resistance

V-11 11V

, V

OUT

V(V+ - 40) (V- + 40)V

, V

OUT

Analog Signal Range

Fault-Free Analog Signal Range

140 350

150

125

62 100

V(V- + 3) (V+ - 1.5)V

OUT

Analog-Signal Output

Range (Fault)

62 85

100

125

UNITSMIN TYP MAXSYMBOLPARAMETER

+25°C

All

+25°C

C, E, M

C, E

+25°C

All

+25°C

C, E

+25°C

C, E, M

TEMP.

RANGE

V+ = V- = 0V, V

= ±35V,

OUT

= open circuit

-1000 1000

IN(OFF)

Signal-Path Leakage

(Power Off)

-10 10

C, E, M

+25°C

= ±25V, V

OUT

= open circuit nA

-1000 1000

IN(ON)

Signal-Path Leakage

(with Fault Condition)

-10 10

C, E, M

+25°C

= V

OUT

= ±10V nA

-100 100

OUT(ON)

Signal-Path Leakage

(without Fault Condition)

-1 1

C, E, M

+25°C

-1 1+25°C

(IN-OUT)

< 1000Ω (Note 2) V±2.25 ±18V+, V-

Power-Supply Range

(without Fault Condition)

+25°C,

C, E, M

µA

-10 10

I+, I-Power-Supply Current

C, E, M

V0 ±18V+, V-Power-Supply Range

+25°C,

C, E, M

C, E, M -1000 1000

POWER SUPPLY

MAX366/MAX367

Signal-Line Circuit Protectors

_______________________________________________________________________________________

-25-35 15 25 35

TRANSFER CHARACTERISTICS

(BIPOLAR SUPPLIES)

MAX366/7-02

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V),

INPUT & OUTPUT CURRENT (µA)

0-15 -5 5

-15

-10

-5

V+ = +3V,

V- = -3V

V+ = +5V,

V- = -5V

V+ = +15V, V- = -15V

V+ = +10V, V- = -10V

OUTPUT

LOAD = 1MΩ

15 25 3520 30

TRANSFER CHARACTERISTICS

(SINGLE SUPPLY)

MAX366/7-03

INPUT VOLTAGE (V)

> (V+ - 35V)

OUTPUT VOLTAGE (V),

INPUT & OUTPUT CURRENT (µA)

0 105

V+ = 25V

V+ = 15V

V+ = 10V

V+ = 5V

OUTPUT LOAD = 1MΩ

V- = 0V

1E+01

1E+02

1E+03

1E+04

1E+05

1E+06

1E+07

1E+08

-15 15

PATH RESISTANCE vs. INPUT VOLTAGE

(BIPOLAR SUPPLIES)

MAX366/7-04

INPUT VOLTAGE (V)

PATH RESISTANCE (Ω)

0-10 -5 105

V± = ±15V

Circuit of Fig. 6

V± = ±10V

V± = ±5V

V± = ±3V

500

-15 15

PATH RESISTANCE vs. INPUT VOLTAGE

(BIPOLAR SUPPLIES)

400

MAX366/7-05

INPUT VOLTAGE (V)

PATH RESISTANCE (Ω)

200

100

-10 -5 10

300

450

250

150

350

V± = ±15V

V± = ±10V

V± = ±5V

V± = ±3V



Circuit of Fig. 6

__________________________________________Typical Operating Characteristics

(V+ = +15V, V- = -15V, T

= +25°C, unless otherwise noted.)

P1-P3 P4-P6 P7-P9 P10-P12

MAX366CSA+

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MAX366CSA+

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