High-Speed, Single-Supply,

Quad, SPST Analog Switches

6

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

__________Applications Information

Overvoltage Protection

Proper power-supply sequencing is recommended for

all CMOS devices. Do not exceed the absolute maxi-

mum ratings because stresses beyond the listed rat-

ings may cause permanent damage to the devices.

Always sequence V+ on first, followed by the logic

inputs. If power-supply sequencing is not possible, add

a small signal diode in series with V+ for overvoltage

protection (Figure 1). Adding a diode reduces the ana-

log signal range to 1V below V+, but low switch resis-

tance and low leakage characteristics are unaffected.

Device operation is unchanged, and the difference

between V+ and V- should not exceed 17V.

______________________________________________________________Pin Description

POSITIVE SUPPLY

COM

NO

Vg

V+

V-

GND

Figure 1. Overvoltage Protection Using Two External Blocking

Diodes

0

40

20

80

60

100

120

10

12

13

11

14

15

16

TURN-ON/OFF TIME

vs. POWER-SUPPLY VOLTAGE

POWER-SUPPLY VOLTAGE (V)

10

-90

0.1

10

100

1

1000

FREQUENCY RESPONSE

FREQUENCY (MHz)

-80

-70

-60

-50

-40

-30

-20

-10

0

V+ = 15V

ON-RESPONSE

OFF-ISOLATION

Positive Supply Voltage Input. Connected to substrate.

V+

13

No Connection. Not internally connected.

N.C.

12

Ground

GND

5

Negative Supply Voltage Input. Normally connected to ground.

V-

4

PIN

Switch Inputs

NO1–NO4

or

NC1–NC4

3, 14, 11, 6

Analog Switch Common Terminal

COM1–COM4

2, 15, 10, 7

Switch Input Terminals. Drive

≤ 0.8V for logic “0”; drive ≥ 5V for logic “1”.

IN1–IN4

1, 16, 9, 8

FUNCTION

NAME