__________Applications Information

Operation with Supplies Other than ±15V

The main limitation of supply voltages other than

±15V is reduced analog-signal range. The MAX351/

MAX352/MAX353 operate with ±5V to ±20V bipolar

supplies. The

Typical Operating Characteristics graphs

±5V supplies. (Switching times increase by a factor of

two or more for operation at ±5V.) The MAX351/

MAX352/MAX353 can operate from +10V to +30V

unipolar supplies. Each device can also be powered

from unbalanced supplies such as +24V and -5V.

Connect V- to 0V when operating with a single supply.

VL must be connected to +5V to be TTL compatible or

to V+ for CMOS-logic input levels.

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+ first, followed by VL, V-, and logic

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

two small signal diodes in series with the supply pins

for overvoltage protection (Figure 1). Adding diodes

reduces the analog signal range to 1V below V+ and

1V below V-, but low switch resistance and low-leakage

characteristics are unaffected. Device operation is

unchanged, and the difference between V+ to V-

should not exceed +44V.

Precision, Quad, SPST Analog Switches

6

_______________________________________________________________________________________

NAME

FUNCTION

1, 8, 9, 16

IN1-IN4

Inputs

2, 7, 10, 15

COM1-COM4

Analog Switch Common Terminal

3, 6, 11, 14

NO or NC

Switch Inputs

PIN

4

V-

Negative Supply-Voltage Input

5

GND

Ground

12

VL

Logic Supply Voltage

13

V+

Positive Supply-Voltage Input—connected to substrate

______________________________________________________________Pin Description

V+

COM_

V-

NO_

Vg

V+

V-

Figure 1. Overvoltage Protection Using External Blocking

Diodes