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General Description

The MAX4631/MAX4632/MAX4633 high-voltage, dual

analog switches are pin compatible with the industry-stan-

dard DG401/DG403/DG405. They upgrade the existing

handling capabilities. The MAX4631/MAX4632/MAX4633’s

normally open (NO) and normally closed (NC) terminals

are protected from overvoltage faults up to 36V during

power-up or power-down. During a fault condition, these

terminals become open circuit and only nanoamperes of

leakage current flow from the source, yet the switch output

(COM_) continues to furnish up to 18mA of the appropri-

ate polarity supply voltage to the load. This ensures unam-

biguous rail-to-rail outputs when a fault begins and ends.

On-resistance is 85

Ω (max) at +25°C and is matched

between switches to 6

Ω (max). Off-leakage current is only

0.5nA at +25°C and 5nA at +85°C.

The MAX4631 has two NO single-pole/single-throw (SPST)

switches. The MAX4632 has two NO/NC single-pole/

double-throw (SPDT) switches. The MAX4633 has two NO

double-pole/single-throw (DPST) switches.

These CMOS switches operate with dual power supplies

ranging from ±4.5V to ±18V or a single supply between

+9V and +36V. All digital inputs have +0.8V and +2.4V

logic thresholds, ensuring both TTL- and CMOS-logic

compatibility when using ±15V or a single +12V supply.

Applications

ATE Equipment

Data Acquisition

Industrial and Process Control Systems

Avionics

Redundant/Backup Systems

Features

o Fault Protection

±40V with Power Off

±36V with ±15V Supplies (MAX4631/MAX4633)

±25V with ±15V Supplies (MAX4632)

o Rail-to-Rail Signal Handling

o No Power-Supply Sequencing Required

o All Switches Off with Power Off

o Output Clamped to Appropriate Supply Voltage

During Fault Condition; No Transition Glitch

o 85

Ω (max) Signal Paths with ±15V Supplies

o ±4.5V to ±18V Dual Supplies

+9V to +36V Single Supply

o Low Power Consumption: <6mW

o Pin Compatible with Industry-Standard

DG401/DG403/DG405

o TTL- and CMOS-Logic Compatible Inputs with

Single +9V to +15V, or ±15V Supplies

Fault-Protected, High-Voltage,

Dual Analog Switches

________________________________________________________________

Maxim Integrated Products

1

19-1515; Rev 0; 7/99

Ordering Information

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

Pin Configurations appear at end of data sheet.

PART

MAX4631CSE

MAX4631CPE

MAX4631ESE

-40°C to +85°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

16 Narrow SO

16 Plastic DIP

16 Narrow SO

MAX4631EPE

MAX4631MJE

MAX4632CSE

0°C to +70°C

-55°C to +125°C

-40°C to +85°C

16 Plastic DIP

16 CERDIP

16 Narrow SO

MAX4632CPE

MAX4632ESE

MAX4632EPE

-40°C to +85°C

-40°C to +85°C

0°C to +70°C

16 Plastic DIP

16 Narrow SO

16 Plastic DIP

MAX4632MJE

MAX4633CSE

MAX4633CPE

0°C to +70°C

0°C to +70°C

-55°C to +125°C

16 CERDIP

16 Narrow SO

16 Plastic DIP

MAX4633ESE

MAX4633EPE

MAX4633MJE

-55°C to +125°C

-40°C to +85°C

-40°C to +85°C

16 Narrow SO

16 Plastic DIP

16 CERDIP