MAX14504 Maxim, MAX14504 Datasheet - Page 10

• Manufacturer Part Number: MAX14504
• Description: The MAX14504/MAX14505/MAX14505A/MAX14506 dual single-pole/double-throw (SPDT) audio switches feature negative signal capability that allows signals from -VCC to +VCC to pass without distortion
• Manufacturer: Maxim

Dual SPDT Negative Rail Analog Switches
with ±V
The MAX14504/MAX14505/MAX14505A/MAX14506
logic inputs accept up to +5.5V, regardless of supply
voltage. For example, with a +3.3V supply, CB and EN
can be driven low to GND and high to +5.5V, allowing
for mixed logic levels in a system. Using logic levels of
V
These devices pass signals from -V
minimal distortion and very little change in on-resistance
(see the Typical Operating Characteristics ). The switch-
es are bidirectional; therefore, the NO_, NC_, and COM_
terminals can be used as either inputs or outputs.
The MAX14505/MAX14505A have a shunt switch on
NO1 and NO2 terminals to automatically discharge any
capacitance when they are not connected to COM1
and COM2. The shunt switch reduces audible click-
10
IL
= 0 to V
______________________________________________________________________________________
IH
≥ V
CC
CC
reduces supply current.
Click-and-Pop Suppression
Capability
Digital Control Inputs
Analog Signal Levels
CC
to +V
CC
with
and-pop sounds that occur when switching between
capacitively coupled audio sources. Audible clicks and
pops are caused when a step DC voltage is switched
into the speaker. The DC step transients are reduced
by automatically discharging the side that is not con-
nected to the COM terminal, reducing any residual DC
voltage and reducing clicks and pops.
Proper power-supply sequencing is recommended for
all CMOS devices. Improper supply sequencing can
force the switch into latch-up, causing it to draw exces-
sive supply current. The only way out of latch-up is to
remove all signals and power and then reapply properly.
Connect all ground pins first, apply power to V
finally apply signals to NO_, NC_, and COM_. Follow the
reverse order upon power-down.
Applications Information
Power-Supply Sequencing
CC
, and