Low-Voltage, Single-Supply

Dual SPST/SPDT Analog Switches

6

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Applications Information

Logic Levels

The MAX4541–MAX4544 are TTL compatible when

powered from a single +5V supply. When powered

from other supply voltages, TTL compatibility is guar-

For example, with a +12V supply, IN1 and IN2 can be

driven low to 0 and high to 12V. With a +3.3V supply,

IN1 and IN2 should be driven low to 0 and high to

3.3V.

Driving IN1 and IN2 rail-to-rail minimizes power con-

sumption.

Analog Signal Levels

Analog signals that range over the entire supply voltage

(V+ to GND) can be switched with very little change in

on-resistance over the entire voltage range (see Typical

Operating Characteristics). All the switches are bidirec-

tional, so the NO_, NC_, and COM_ pins can be used

as either inputs or outputs.

Pin Description

POSITIVE SUPPLY

COM

NO

D2

D1

GND

Vg

V+

Figure 1. Overvoltage Protection Using Two External Blocking

Diodes

11 ——

11

——

NO1

Analog Switch 1—Normally Open

Digital Control Input 1

7

2

Analog Switch 2—Common

6

6

Analog Switch 2—Normally Open

—

5

Ground—Negative Supply Input

4

4

PIN

Digital Control Input 2

3

3

Analog Switch 1—Common

2

Positive Supply Voltage Input

Analog Switch 1—Normally Open

1

1

FUNCTION

8

8

7

Not Connected (open circuit)

—

—

Analog Switch—Normally Closed

—

—

Analog Switch—Normally Open

—

—

Analog Switch 2—Normally Closed

5

—

Analog Switch 1—Normally Closed

—

Digital Control Input

—

—

—

2

6

—

4

3

—

8

7

1

—

—

5

—

—

8

4

—

6

3

—

2

7

1

—

—

5

—

—

7

4

—

6

3

8

1

2

—

—

—

5

—

—

IN1

COM2

NO2

GND

IN2

COM1

NO1

NAME

V+

N.C.

NC

NO

NC2

NC1

IN

Analog Switch—Common

—

—

—

—

—

COM

8

4

5

6

3

1

2

7

—

—

—

—

—

—

—

—

—

—

4

—

—

—

8

5, 6

3

1

—

—

7

—

—

—

3

—

—

—

2

—

4

6

—

—

1

2

5

MAX4543

DIP/SO/

µMAX/

QFN

MAX4541

DIP/SO/

µMAX/

QFN

SOT23-8

DIP/SO/

µMAX/

QFN

MAX4542

SOT23-8

SOT23-8

DIP/SO/

µMAX/

QFN

MAX4544

SOT23-6

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