Low-Voltage, CMOS Analog

Multiplexers/Switches

8

_______________________________________________________________________________________

__________Applications Information

Power-Supply Considerations

Overview

The MAX4581/MAX4582/MAX4583 construction is typi-

cal of most CMOS analog switches. They have three

to drive the internal CMOS switches and set the limits of

the analog voltage on any switch. Reverse ESD-

protection diodes are internally connected between

Pin Description

Note: Input and output pins are identical and interchangeable. Any may be considered an input or output; signals pass equally well

in both directions.

PIN

MAX4581

MAX4582

MAX4583

DIP, SO,

TSSOP

QFN

DIP, SO,

TSSOP

QFN

DIP, SO,

TSSOP

QFN

NAME

FUNCTION

13, 14,

15, 12,

1, 5, 2, 4

11, 12,

13, 10,

15, 3,

16, 2

—

———

X0–X7

Analog Switch Inputs 0–7

31

13

11

14

12

X

Analog Switch “X” Output

——

12, 14,

15, 11

10, 12,

13, 9

——

X0, X1,

X2, X3

Analog Switch “X” Inputs 0–3

——

1, 5, 2,

4

15, 3,

16, 2

——

Y0, Y1,

Y2, Y3

Analog Switch “Y” Inputs 0–3

——

31

15

13

Y

Analog Switch “Y” Output

———

—1311X1

Analog Switch “X” Normally Open Input

———

—1210X0

Analog Switch “X” Normally Closed Input

———

—1

15

Y1

Analog Switch “Y” Normally Open Input

———

—2

16

Y0

Analog Switch “Y” Normally Open Input

———

—3

1Z1

Analog Switch “Z” Normally Open Input

———

—5

3Z0

Analog Switch “Z” Normally Open Input

———

—4

2Z

Analog Switch “Z” Output

16

14

16

14

16

14

Positive Analog and Digital Supply-Voltage

Input

11

9

10

8

11

9

A

Digital Address “A” Input

10

8

9

7

10

8

B

Digital Address “B” Input

97

——

97

CDigital Address “C” Input

868

686

GND

Ground. Connect to digital ground. (Analog

signals have no ground reference; they are

757

575

Negative Analog Supply-Voltage Input.

Connect to GND for

single-supply operation.

646

464

ENABLE

Digital Enable Input. Normally connected to

GND.