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General Description

The MAX4508/MAX4509 are 8-to-1 and dual 4-to-1 fault-

protected multiplexers that are pin-compatible with the

industry-standard DG508/DG509. The MAX4508/

MAX4509 operate with dual supplies of ±4.5V to ±20V or

a single supply of +9V to +36V. These multiplexers fea-

capability, and overvoltage clamping at 150mV beyond

the rails.

Both parts offer ±40V overvoltage protection with sup-

plies off and ±25V protection with supplies on. On-

resistance is 400

Ω max and is matched between

channels to 15

Ωmax. All digital inputs have TTL logic

thresholds, ensuring both TTL and CMOS logic com-

patibility when using a single +12V supply or dual ±15V

supplies.

Applications

Data-Acquisition Systems

Industrial and Process Control

Avionics

Signal Routing

Redundant/Backup Systems

Features

o ±40V Fault Protection with Power Off

±25V Fault Protection with ±15V Supplies

o Rail-to-Rail Signal Handling

o No Power-Supply Sequencing Required

o All Channels Off with Power Off

o Output Clamped to Appropriate Supply Voltage

During Fault Condition

o 1k

Ω Output Clamp Resistance During

Overvoltage

o 400

Ωmax On-Resistance

o 20ns Fault-Response Time

o ±4.5V to ±20V Dual Supplies

+9V to +36V Single Supply

o TTL/CMOS-Compatible Logic Inputs

Fault-Protected, High-Voltage

Single 8-to-1/Dual 4-to-1 Multiplexers

________________________________________________________________

Maxim Integrated Products

1

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

A1

A2

GND

V+

NO1

V-

EN

A0

TOP VIEW

MAX4508

NO5

NO6

NO7

NO8

COM

NO4

NO3

NO2

SSOP/SO/DIP

LOGIC

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

A1

GND

V+

NO1B

NO1A

V-

EN

A0

MAX4509

NO2B

NO3B

NO4B

COMB

COMA

NO4A

NO3A

NO2A

SSOP/SO/DIP

LOGIC

Pin Configurations/Functional Diagrams

19-1414; Rev 0; 1/99

PART

MAX4508CAE

MAX4508CSE

MAX4508CPE

0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

16 SSOP

16 Narrow SO

16 Plastic DIP

Ordering Information continued at end of data sheet.

*

Contact factory for dice specifications.

**

Contact factory for availability.

Functional Diagrams/Truth Tables appear at end of

data sheet.

Ordering Information

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

MAX4508C/D

0°C to +70°C

Dice*

MAX4508EAE

-40°C to +85°C

16 SSOP

MAX4508ESE

-40°C to +85°C

16 Narrow SO

MAX4508EPE

-40°C to +85°C

16 Plastic DIP

MAX4508MJE

-55°C to +125°C

16 CERDIP**