MAX4910 Maxim, MAX4910 Datasheet - Page 7

• Manufacturer Part Number: MAX4910
• Description: The MAX4910/MAX4911/MAX4912 quad, singlepole/double-throw (SPDT), clickless audio switches feature negative signal capability that allows signals as low as VCC -5
• Manufacturer: Maxim

The MAX4910/MAX4911/MAX4912 quad SPDT audio
switches are low on-resistance, low supply current,
high power-supply rejection ratio (PSRR) devices that
operate from a +1.8V to +5.5V single supply. These
devices feature a negative signal capability that allows
signals below GND to pass through without distortion
and break-before-make switching.
The MAX4910/MAX4912 have two digital control inputs
CB1 and CB2 where each bit controls a pair of switch-
es (see Table 1). The MAX4911 has an active-low
enable EN and a digital control bit CB. Driving EN low
takes the switches out of high impedance and CB con-
trols all four switches (see Table 2). The MAX4910/
MAX4911 have shunt resistors on all their NO and NC
terminals to suppress click-and-pop sounds that may
occur from switching to a precharged terminal. The
MAX4912 does not have click-and-pop suppression
resistors on NC2 and NC4 for applications that do not
require predischarge switching.
MAX4910/
MAX4912
10
11
12
13
14
15
16
—
—
—
1
2
3
4
5
6
7
8
9
PIN
MAX4911
10
11
12
13
14
15
16
—
—
—
1
2
3
4
5
6
7
8
9
_______________________________________________________________________________________
Detailed Description
Quad-SPDT, Clickless Audio Switches
NAME
COM2
COM3
COM4
COM1
GND
NC1
NO2
NC2
NO3
NC3
NO4
NC4
NO1
CB1
CB2
V
CB
EN
EP
CC
Analog Switch 1—Normally Closed Terminal
Digital Control Input for Analog Switch 1 and Analog Switch 3
Digital Control Input for All Analog Switches
Analog Switch 2—Normally Open Terminal
Analog Switch 2—Common Terminal
Analog Switch 2—Normally Closed Terminal
Ground
Analog Switch 3—Normally Open Terminal
Analog Switch 3—Common Terminal
Analog Switch 3—Normally Closed Terminal
Digital Control Input for Analog Switch 2 and Analog Switch 4.
Enable Input. Driving EN high causes all switches to be high impedance. Pull EN low for
normal operation.
Analog Switch 4—Normally Open Terminal
Analog Switch 4—Common Terminal
Analog Switch 4—Normally Closed Terminal
Positive Supply Voltage Input
Analog Switch 1—Normally Open Terminal
Analog Switch 1—Common Terminal
Exposed Pad. Connect to Ground
with Negative Signal Handling
Table 1. MAX4910/MAX4912 Truth Tables
Table 2. MAX4911 Truth Table
X = Don’t care.
CB1
CB2
0
1
0
1
EN
1
0
0
FUNCTION
NC1
NC2
On
Off
On
Off
CB
X
1
0
NO1
NO2
Off
On
Off
On
Pin Description
NC_
Off
Off
On
NC3
NC4
On
Off
On
Off
NO_
Off
On
Off
NO3
NO4
Off
On
Off
On
7