Low-Voltage, CMOS Analog

Multiplexers/Switches

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Detailed Description

The MAX4581L/MAX4582L/MAX4583L are low-voltage,

CMOS analog ICs that operate from a single supply of

+2V to +12V. The MAX4581L is configured as an 8-

channel multiplexer, the MAX4582L as two 4-channel

multiplexers, and the MAX4583L as three single-

pole/double-throw (SPDT) switches. These devices can

handle rail-to-rail analog signals with only 2nA of off-

leakage current at +25°C.

The MAX4581L/MAX4582L/MAX4583L are TTL/CMOS-

logic compatible with 0.8V to 2.0V logic thresholds for

all digital inputs when operating from a +12V supply.

Applications Information

Power-Supply Considerations

The MAX4581L/MAX4582L/MAX4583Ls’ construction is

typical of most CMOS analog switches. The supply

es and sets the limit of the analog voltage on any

switch. Reverse ESD protection diodes are internally

connected between each analog signal pin and both

goes below GND, one of these diodes conducts.

During normal operation, these reverse-biased ESD

or 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 by either

leakage varies as the analog signal varies. The differ-

stitutes the analog signal-path leakage current.

Because there is no connection between the analog

signal paths and GND, all analog leakage current flows

between each pin and one of the supply terminals, not

to the other switch terminal. Because of this, both sides

of a given switch can show leakage currents of either

the same or opposite polarity.

translators, and set both the input and output logic lim-

its. The logic-level translators convert the logic levels

of the analog switches. This drive signal is the only

connection between the logic supplies (and signals)

and the analog supplies. The logic-level thresholds are

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 can cause permanent damage to the devices.

and analog signals.

Pin Nomenclature

The MAX4581L/MAX4582L/MAX4583L are pin compati-

ble with the industry-standard 74HC4051/74HC4052/

74HC4053 and the MAX4051/MAX4052/MAX4053.

Table 1. Truth Table/Switch Programming

SELECT INPUTS

ON SWITCHES

ENABLE

INPUT

C*

B

A

MAX4581L

MAX4582L

MAX4583L

H

X

X

X

All switches open

All switches open

All switches open

L

L

L

L

X–X0

X–X0, Y–Y0

X–X0, Y–Y0, Z–Z0

L

L

L

H

X–X1

X–X1, Y–Y1

X–X1, Y–Y0, Z–Z0

L

L

H

L

X–X2

X–X2, Y–Y2

X–X0, Y–Y1, Z–Z0

L

L

H

H

X–X3

X–X3, Y–Y3

X–X1, Y–Y1, Z–Z0

L

H

L

L

X–X4

X–X0, Y–Y0

X–X0, Y–Y0, Z–Z1

L

H

L

H

X–X5

X–X1, Y–Y1

X–X1, Y–Y0, Z–Z1

L

H

H

L

X–X6

X–X2, Y–Y2

X–X0, Y–Y1, Z–Z1

L

H

H

H

X–X7

X–X3, Y-Y3

X–X1, Y–Y1, Z–Z1

X = Don’t care.

*C not present on MAX4582L.

Note: Input and output pins are identical and interchangeable. Either may be considered an input or output; signals pass equally

well in either direction.