Detailed Description

The MAX4651/MAX4652/MAX4653 are low on-resis-

tance, low-voltage analog switches that operate from a

single +1.8V to +5.5V supply. CMOS switch construc-

tion allows processing analog signals that are within the

supply voltage range (GND to V+).

Applications Information

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 can cause permanent damage to the devices.

Always sequence V+ on first, followed by the logic

inputs, NO or COM. If power-supply sequencing is not

possible, add two small signal diodes (D1, D2) in series

with the supply pins for overvoltage protection (Figure

1). Adding these diodes reduces the analog signal by

one diode drop below V+ and one diode drop above

GND, but does not affect the devices’ low switch resis-

tance and low leakage characteristics. Device opera-

tion is unchanged, and the difference between V+ and

GND should not exceed 6V.

Although it is not required, power-supply bypassing

improves noise margin and prevents switching noise

from propagating from the V+ supply to other compo-

nents. A 0.1µF capacitor connected from V+ to GND is

adequate for most applications.

Low-Voltage, 4

Ω, Quad, SPST,

CMOS Analog Switches

8

________________________________________________________________________________________

COM_

GND

V+

NO_

* INTERNAL PROTECTION DIODES

D1

V+

MAX4651

MAX4652

MAX4653

*

*

*

*

D2

Figure 1. Overvoltage Protection Using External Blocking

Diodes

TRANSISTOR COUNT: 205

Chip Information