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-

ture fault-protected inputs, rail-to-rail signal handling

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

Ω max. 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

♦ ±40V Fault Protection with Power Off

±25V Fault Protection with ±15V Supplies

♦ Rail-to-Rail Signal Handling

♦ No Power-Supply Sequencing Required

♦ All Channels Off with Power Off

♦ Output Clamped to Appropriate Supply Voltage

During Fault Condition

♦ 1kΩ Output Clamp Resistance During

Overvoltage

♦ 400Ω

Ω max On-Resistance

♦ 20ns Fault-Response Time

♦ ±4.5V to ±20V Dual Supplies

+9V to +36V Single Supply

♦ TTL/CMOS-Compatible Logic Inputs

Fault-Protected, High-Voltage Single 8-to-1/

Dual 4-to-1 Multiplexers with Output Clamps

________________________________________________________________ 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

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

SO/DIP

LOGIC

Pin Configurations/Functional Diagrams

19-1414; Rev 5; 10/07

Ordering Information continued at end of data sheet.

*Contact factory for dice specifications.

**Contact factory for availability.

+Denotes a lead-free package.

Functional Diagrams/Truth Tables appear at end of

data sheet.

Ordering Information

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP

RANGE

PIN-

PACKAGE

PKG

CODE

MAX4508CSE+

0°C to +70°C

16 Narrow SO

S16-8

MAX4508CPE+

0°C to +70°C

16 Plastic DIP

P16-4

MAX4508C/D

0°C to +70°C

Dice*

—

MAX4508ESE+

-40°C to +85°C 16 Narrow SO

S16-8

MAX4508EPE+

-40°C to +85°C 16 Plastic DIP

P16-4

MAX4508MJE

-40°C to +85°C 16 CERDIP**

J16-3