Datasheet

NAME
MAX4541–MAX4544
Low-Voltage, Single-Supply
Dual SPST/SPDT Analog Switches
6 _______________________________________________________________________________________
Applications Information
Logic Levels
The MAX4541–MAX4544 are TTL compatible when
powered from a single +5V supply. When powered
from other supply voltages, TTL compatibility is guar-
anteed and the logic inputs can be driven rail-to-rail.
For example, with a +12V supply, IN1 and IN2 can be
driven low to 0 and high to 12V. With a +3.3V supply,
IN1 and IN2 should be driven low to 0 and high to
3.3V.
Driving IN1 and IN2 rail-to-rail minimizes power con-
sumption.
Analog Signal Levels
Analog signals that range over the entire supply voltage
(V+ to GND) can be switched with very little change in
on-resistance over the entire voltage range (see the
Typical Operating Characteristics). All the switches are
bidirectional, so the NO_, NC_, and COM_ pins can be
used as either inputs or outputs.
Pin Description
POSITIVE SUPPLY
COM
NO
D2
D1
GND
V
g
V+
Figure 1. Overvoltage Protection Using Two External Blocking
Diodes
Digital Control Input 1
7
2
Analog Switch 2—Common66
Analog Switch 2—Normally Open—5
Ground—Negative Supply Input44
PIN
Digital Control Input 233
Analog Switch 1—Common2
Positive Supply Voltage Input
Analog Switch 1—Normally Open11
FUNCTION
88
7
Not Connected (Open Circuit)—
—
Analog Switch—Normally Closed——
Analog Switch—Normally Open——
Analog Switch 2—Normally Closed5—
Analog Switch 1—Normally Closed—
Digital Control Input——
—
2
6
—
4
3
—
8
7
1
—
—
5
—
—
8
4
—
6
3
—
2
7
1
—
—
5
—
—
7
4
—
6
3
8
1
2
—
—
—
5
—
—
IN1
COM2
NO2
GND
IN2
COM1
NO1
NAME
V+
N.C.
NC
NO
NC2
NC1
IN
Analog Switch—Common—— — — — COM
8
4
5
6
3
1
2
7
—
—
—
—
—
—
—
—
—
—
4
—
—
—
8
5, 6
3
1
—
—
7
—
—
—
3
—
—
—
2
—
4
6
—
—
1
2 5
MAX4543
DIP/SO/
µMAX/
TDFN
MAX4541
DIP/SO/
µMAX/
TDFN
SOT23-8
DIP/SO/
µMAX/
TDFN
MAX4542
SOT23-8 SOT23-8
DIP/SO/
µMAX/
TDFN
MAX4544
SOT23-6
Exposed Pad. Connect EP to V+.EPEP EP — — EP— EP —