Detailed Description

The MAX4699/MAX4701 are low-voltage CMOS analog

switches that operate from a single +1.8V to +5.5V

power supply. The MAX4702 requires an additional

logic supply that allows for setting lower logic thresh-

olds. The MAX4699/MAX4701 are double-pole/double-

throw (DPDT) devices. The MAX4702 is a quad

single-pole/double-throw (SPDT) device. These devices

feature a break-before-make switching, fast switching

signal handling. A logic input on the MAX4702 allows

for logic thresholds as low as 1.0V.

Applications Information

Analog Signal Levels

Analog signals that range over the entire supply voltage

(V+ to GND) can be passed with very little change in on-

resistance (see

Typical Operating Characteristics). The

switches are bidirectional, so the NO, NC, and COM pins

can be used as either inputs or outputs.

_______________________________________________________________________________________

7

Low-Voltage, Dual DPDT/Quad SPDT

Analog Switches in QFN

Pin Description

TQFN-EP PIN

TSSOP PIN

MAX4699/

MAX4701

MAX4702

MAX4701

MAX4702

NAME

FUNCTION

1

1

3

3

NC1

Analog Switch 1—Normally Closed Terminal

—

2

—

4

IN

Digital Control Input Switch 1, 2, 3, and 4

2

—

4

—

IN1, IN2

Digital Control Input Switch 1 and 2

3

3

5

5

NO2

Analog Switch 2—Normally Open Terminal

4

4

6

6

COM2

Analog Switch 2—Common Terminal

5

5

7

7

NC2

Analog Switch 2—Normally Closed Terminal

6

6

8

8

GND

Ground

7

7

9

9

NO3

Analog Switch 3—Normally Open Terminal

8

8

10

10

COM3

Analog Switch 3—Common Terminal

9

9

11

11

NC3

Analog Switch 3—Normally Closed Terminal

—

10

—

12

Logic Power-Supply Input

10

—

12

—

IN3, IN4

Digital Control Input Switch 3 and 4

11

11

13

13

NO4

Analog Switch 4—Normally Open Terminal

12

12

14

14

COM4

Analog Switch 4—Common Terminal

13

13

15

15

NC4

Analog Switch 4—Normally Closed Terminal

14

14

16

16

V+

Positive Supply Voltage Input

15

15

1

1

NO1

Analog Switch 1—Normally Open Terminal

16

16

2

2

COM1

Analog Switch 1—Common Terminal

—

—

—

—

EP

Exposed Pad (TQFN Only). Connect EP to GND.

POSITIVE SUPPLY

COM

NO

D2

D1

GND

Vg

V+

MAX4699

MAX4701

MAX4702

Figure 1. Overvoltage Protection Using Two External Blocking

Diodes