Applications Information

Power-Supply Considerations

Overview

The MAX4617/MAX4618/MAX4619 construction is typical

of most CMOS analog switches. They have two supply

internal CMOS switches and set the limits of the analog

voltage on any switch. Reverse ESD-protection diodes

are internally connected between each analog-signal pin

normal operation, these and other reverse-biased ESD

GND.

Virtually all the analog leakage current comes from the

ESD diodes. Although the ESD diodes on a given signal

pin are identical and therefore fairly well balanced, they

are reverse biased differently. Each is biased by either

ages will vary as the signal varies. The difference in the

the analog-signal-path leakage current. All analog leak-

age current flows between each pin and one of the supply

terminals, not to the other switch terminal. This is why

both sides of a given switch can show leakage currents of

either the same or opposite polarity.

logic limits. Logic inputs have ESD-protection diodes to

ground.

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

NAME

FUNCTION

MAX4617

MAX4618

MAX4619

13, 14, 15,

12, 1, 5, 2, 4

—

—

X0–X7

Analog Switch Inputs 0–7

3

—

—

X

Analog Switch Output

—

12, 14, 15, 11

—

X0, X1, X2, X3

Analog Switch “X” Inputs 0–3

—

13

14

X

Analog Switch “X” Output

—

—

13

X1

Analog Switch “X” Normally Open Input

—

—

12

X0

Analog Switch “X” Normally Closed Input

—

—

1

Y1

Analog Switch “Y” Normally Open Input

—

—

2

Y0

Analog Switch “Y” Normally Closed Input

6

6

6

ENABLE

Digital Enable Input. Normally connect to GND. Can be driven

to logic high to set all switches off.

7

7

7

N.C.

No Connection. Not Internally connected.

8

8

8

GND

Ground

11

10

11

A

Digital Address “A” Input

10

9

10

B

Digital Address “B” Input

9

—

9

C

Digital Address “C” Input

—

1, 5, 2, 4

—

Y0, Y1, Y2, Y3

Analog Switch “Y” Inputs 0–3

—

3

15

Y

Analog Switch “Y” Output

—

—

5

Z0

Analog Switch “Z” Normally Closed Input

—

—

3

Z1

Analog Switch “Z” Normally Open Input

—

—

4

Z

Analog Switch “Z” Output

16

16

16

Positive Analog and Digital Supply Voltage Input

www.analog.com

Analog Devices │ 8

MAX4617/MAX4618/

MAX4619

High-Speed, Low-Voltage, CMOS Analog

Multiplexers/Switches

Pin Description