MAX4581L Maxim, MAX4581L Datasheet - Page 7
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MAX4581L
Manufacturer Part Number
MAX4581L
Description
The MAX4581L/MAX4582L/MAX4583L are low-voltage,
CMOS analog ICs configured as an 8-channel multiplexer
(MAX4581L), two 4-channel multiplexers
(MAX4582L), and three single-pole/double-throw
(SPDT) switches (MAX4583L)
Manufacturer
Maxim
Datasheet
1.MAX4581L.pdf
(16 pages)
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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.
The MAX4581L/MAX4582L/MAX4583Ls’ construction is
typical of most CMOS analog switches. The supply
input, V
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
V
goes below GND, one of these diodes conducts.
During normal operation, these reverse-biased ESD
diodes leak, causing the only current drawn from V
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
Table 1. Truth Table/Switch Programming
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.
CC
ENABLE
INPUT
H
and GND. If any analog signal exceeds V
L
L
L
L
L
L
L
L
CC
, is used to power the internal CMOS switch-
Applications Information
C*
X
H
H
H
H
L
L
L
L
Power-Supply Considerations
_______________________________________________________________________________________
SELECT INPUTS
Detailed Description
B
X
L
L
H
H
L
L
H
H
A
H
H
H
H
X
L
L
L
L
All switches open
CC
MAX4581L
Low-Voltage, CMOS Analog
CC
X–X0
X–X1
X–X2
X–X3
X–X4
X–X5
X–X6
X–X7
or
V
leakage varies as the analog signal varies. The differ-
ence in the two diodes’ leakage to V
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.
V
translators, and set both the input and output logic lim-
its. The logic-level translators convert the logic levels
into switched V
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
TTL/CMOS compatible when V
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
and analog signals.
The MAX4581L/MAX4582L/MAX4583L are pin compati-
ble with the industry-standard 74HC4051/74HC4052/
74HC4053 and the MAX4051/MAX4052/MAX4053.
CC
CC
Multiplexers/Switches
and GND power the internal logic and logic-level
or GND and the analog signal. This means that
ON SWITCHES
All switches open
MAX4582L
X–X0, Y–Y0
X–X1, Y–Y1
X–X2, Y–Y2
X–X3, Y–Y3
X–X0, Y–Y0
X–X1, Y–Y1
X–X2, Y–Y2
X–X3, Y-Y3
CC
and GND signals to drive the gates
CC
first, followed by the logic inputs
Overvoltage Protection
CC
Pin Nomenclature
is +12V.
X–X0, Y–Y0, Z–Z0
X–X1, Y–Y0, Z–Z0
X–X0, Y–Y1, Z–Z0
X–X1, Y–Y1, Z–Z0
X–X0, Y–Y0, Z–Z1
X–X1, Y–Y0, Z–Z1
X–X0, Y–Y1, Z–Z1
X–X1, Y–Y1, Z–Z1
All switches open
CC
MAX4583L
and GND con-
7