Datasheet

MAX4581/MAX4582/MAX4583
Low-Voltage, CMOS Analog
Multiplexers/Switches
_______________________________________________________________________________________ 9
XH
Table 1. Truth Table/Switch Programming
X X All switches open All switches open All switches open
L L X–X0
X–X0,
Y–Y0
X–X0,
Y–Y0,
Z–Z0
LL
L H X–X1
X–X1,
Y–Y1
X–X1,
Y–Y0,
Z–Z0
LL
H H X–X3
X–X3,
Y–Y3
X–X1,
Y–Y1,
Z–Z0
H L X–X2
X–X2,
Y–Y2
X–X0,
Y–Y1,
Z–Z0
LL
LL
L H X–X5
X–X1,
Y–Y1
X–X1,
Y–Y0,
Z–Z1
L L X–X4
X–X0,
Y–Y0
X–X0,
Y–Y0,
Z–Z1
HL
HL
H H X–X7
X–X3,
Y–Y3
X–X1,
Y–Y1,
Z–Z1
H L X–X6
X–X2,
Y–Y2
X–X0,
Y–Y1,
Z–Z1
HL
HL
X = Don’t care
* C not present on MAX4582.
Note: Input and output pins are identical and interchangeable. Either may be considered an input or output; signals pass equally
well in either direction.
ON SWITCHESSELECT INPUTS
B A MAX4581 MAX4582 MAX4583C*
ENABLE
INPUT
will conduct. During normal operation, these and other
reverse-biased ESD diodes leak, forming the only cur-
rent drawn from V
CC
or V
EE
.
Virtually all the analog leakage current comes from the
ESD diodes. Although the ESD diodes on a given sig-
nal pin are identical and therefore fairly well balanced,
they are reverse biased differently. Each is biased by
either V
CC
or V
EE
and the analog signal. This means
their leakages will vary as the signal varies. The differ-
ence in the two diode leakages to the V
CC
and V
EE
pins constitutes the analog-signal-path leakage current.
All analog leakage current flows between each pin and
one of the supply terminals, not to the other switch ter-
minal. This is why both sides of a given switch can
show leakage currents of either the same or opposite
polarity.
There is no connection between the analog-signal
paths and GND.
V
CC
and GND power the internal logic and logic-level
translators, and set the input logic limits. The logic-level
translators convert the logic levels into switched V
CC
and V
EE
signals to drive the gates of the analog sig-
nals. This drive signal is the only connection between
the logic supplies and signals and the analog supplies.
V
CC
and V
EE
have ESD-protection diodes to GND.
The logic-level thresholds are TTL/CMOS compatible
when V
CC
is +5V. As V
CC
rises, the threshold increases