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www.onsemi.com
Please note: As part of the Fairchild Semiconductor integration, some of the Fairchild orderable part numbers
will need to change in order to meet ON Semiconductor’s system requirements. Since the ON Semiconductor
product management systems do not have the ability to manage part nomenclature that utilizes an underscore
(_), the underscore (_) in the Fairchild part numbers will be changed to a dash (-). This document may contain
device numbers with an underscore (_). Please check the ON Semiconductor website to verify the updated
device numbers. The most current and up-to-date ordering information can be found at
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Please
email any questions regarding the system integration to
Fairchild_questions@onsemi.com.
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FSA859 — Dual-Voltage, 0.8 SPDT Analog Switch with Power-Off Isolation
March 2013
FSA859
—
Dual-Voltage, 0.8Ω SPDT Analog Switch with
Power-Off Isolation
Features
Power-Off Isolation (V
CC=
0V)
0.8Ω Maximum On Resistance (R
ON
) for 4.5V V
CC
0.25Ω Maximum R
ON
Flatness for 4.5V V
CC
Broad V
CC
Operating Range: 1.65V to 5.5V
Fast Turn-On and Turn-Off Times
Control Input Referenced to V
IO
Break-Before-Make Enable Circuitry
0.5mm WLCSP packaging
ESD Performance
Description
The FSA859 is a high-performance Single-Pole /
Double-Throw (SPDT) analog switch for audio
applications driven by low voltage (1.8V) baseband
processors or ASICs. The device features ultra-low R
ON
of 0.8 (maximum) at 4.5V V
CC
and operates over the
wide V
CC
range of 1.65V to 5.5V. The device is
fabricated with sub-micron CMOS technology to achieve
fast switching speeds and is designed for break-before-
make operation.
The FSA859 interfaces between the low-voltage ASIC
and regular audio amplifiers and CODECs operating up
to the supply range of 5.5V through the dual-voltage
supplies of V
IO
and V
CC
. The V
IO
supply operates the
control circuitry, allowing for 1.8V (typical) signals on the
control pin (Sel).
-
-
-
HBM: JESD22-A114, I/O to GND
CDM: JESD22-C101
IEC61000-4-2 Contact / Air
8kV
500V
8kV / 15kV
Applications
Cellular Phone
Portable Media Player
PDA
IMPORTANT NOTE:
For additional performance information, please contact
analogswitch@fairchildsemi.com.
Ordering Information
Part
Number
FSA859UCX
Operating
Top Mark
Temperature Range
-40°C to +85°C
N2
Eco Status
Green
Package
8-Ball WLCSP, 0.5mm pitch
Packing
Method
Tape and
Reel
For Fairchild’s definition of “green” Eco Status, please visit:
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