MAX4618 Maxim, MAX4618 Datasheet - Page 8

• Manufacturer Part Number: MAX4618
• Description: The MAX4617/MAX4618/MAX4619 are high-speed, low-voltage, CMOS analog ICs configured as an 8-channel multiplexer (MAX4617), two 4-channel multiplexers (MAX4618), and three single-pole/double-throw (SPDT) switches (MAX4619)
• Manufacturer: Maxim

The MAX4617/MAX4618/MAX4619 construction is typi-
cal of most CMOS analog switches. They have two sup-
ply pins: V
the internal CMOS switches and set the limits of the ana-
log voltage on any switch. Reverse ESD-protection
diodes are internally connected between each analog-
signal pin and both V
exceeds V
During normal operation, these and other reverse-
biased ESD diodes leak, forming the only current drawn
from V
High-Speed, Low-Voltage, CMOS Analog
Multiplexers/Switches
Note: Input and output pins are identical and interchangeable. Any may be considered an input or output; signals pass equally well
8
__________Applications Information
12, 1, 5, 2, 4
13, 14, 15,
MAX4617
_______________________________________________________________________________________
—
—
—
—
—
—
11
10
—
—
—
—
—
16
3
6
7
8
9
CC
in both directions.
or GND.
CC
CC
and GND. V
or GND, one of these diodes conducts.
12, 14, 15, 11
MAX4618
1, 5, 2, 4
Power-Supply Considerations
PIN
—
—
13
—
—
—
—
10
—
—
—
—
16
6
7
8
9
3
CC
and GND. If any analog signal
CC
and GND are used to drive
MAX4619
—
—
—
14
13
12
11
10
—
15
16
1
2
6
7
8
9
5
3
4
X0, X1, X2, X3
Y0, Y1, Y2, Y3
Overview
ENABLE
NAME
X0–X7
GND
N.C.
V
X1
X0
Y1
Y0
Z0
Z1
C
X
X
A
B
Y
Z
CC
Analog Switch Inputs 0–7
Analog Switch Output
Analog Switch “X” Inputs 0–3
Analog Switch “X” Output
Analog Switch “X” Normally Open Input
Analog Switch “X” Normally Closed Input
Analog Switch “Y” Normally Open Input
Analog Switch “Y” Normally Closed Input
Digital Enable Input. Normally connect to GND. Can be driven
to logic high to set all switches off.
No Connection. Not Internally connected.
Ground
Digital Address “A” Input
Digital Address “B” Input
Digital Address “C” Input
Analog Switch “Y” Inputs 0–3
Analog Switch “Y” Output
Analog Switch “Z” Normally Closed Input
Analog Switch “Z” Normally Open Input
Analog Switch “Z” Output
Positive Analog and Digital Supply Voltage Input
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. Each is biased by either
V
leakages will vary as the signal varies. The difference in
the two diode leakages to the V
stitutes the analog-signal-path leakage current. All ana-
log leakage current flows between each pin and one of
the supply terminals, not to the other switch terminal.
This is why both sides of a given switch can show leak-
age currents of either the same or opposite polarity.
V
logic limits. Logic inputs have ESD-protection diodes to
ground.
CC
CC
and GND power the internal logic and set the input
or GND and the analog signal. This means their
FUNCTION
Pin Description
CC
and GND pins con-