This is information on a product in full production.
March 2014 DocID026023 Rev 1 1/23
AS21P2THB
Low voltage high bandwidth dual single-pole double-throw analog
switch
Datasheet - production data
Features
Ultra low power dissipation:
–I
CC
= 1 A (max.) at T
A
= 85 °C
Low “ON” resistance:
–R
ON
= 4.8 (T
A
= 25 °C) at V
CC
= 4.3 V
–R
ON
= 5.9 (T
A
= 25 °C) at V
CC
= 3.0 V
Wide operating voltage range:
–V
CC
(opr.) = 1.65 V to 4.3 V
4.3 V tolerant and 1.8 V compatible threshold
on digital control input at V
CC
= 2.3 V to 3.0 V
Typical bandwidth (-3 dB) at 800 MHz on all
channels
USB (2.0) high speed (480 Mbps) signal
switching compliant
Integrated fail safe function
Interrupt function to indicate to the processor
that the device is in dedicated port charging
mode
Latch-up performance exceeds 500 mA per
JESD 78, Class II
ESD performance exceeds JESD22:
– Dn pins: 4000-V human body model (A114-
A)
– All other pins: 2000-V human body model
(A114-A)
Applications
Wearable
Sport and fitness
Portable equipment
Description
The AS21P2THB is a high-speed CMOS low
voltage dual analog SPDT (single pole double
throw) switch or 2:1 multiplexer/demultiplexer
switch fabricated in silicon gate C²MOS
technology. It is designed to operate from 1.65 V
to 4.3 V, thus making this device the ideal
selection for portable applications.
The SEL input is provided to control the switch.
The switch nS1 is ON (connected to common
ports Dn) when the SEL input is held high and
OFF (high impedance state exists between the
two ports) when SEL is held low, the switch nS2 is
ON (it is connected to common port Dn) when the
SEL input is held low and OFF (high impedance
state exists between the two ports) when SEL is
held high. AS21P2THB has an integrated fail safe
function to withstand over-voltage condition when
the device is powered off.
The AS21P2THB also has an interrupt pin which
sends a signal to the processor when the device
is in dedicated port charging mode. Additional key
features are fast switching speed, break-before-
make-delay time and ultralow power
consumption. All inputs and outputs are equipped
with protection circuits against static discharge,
giving them ESD immunity and transient excess
voltage.
Table 1. Device summary
Order code Package Packaging
AS21P2THB
QFN10 (1.8 x 1.4 mm) Tape and reel
www.st.com
