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August 2008
FSA2859 — Dual-Voltage, 0.8Ω DPDT Analog Switch with
Power-Off Isolation
Features
Description
The FSA2859 is a high-performance Double-Pole /
Double-Throw (DPDT) analog switch for audio
applications driven by low voltage (1.8V) baseband
processors or ASICs. The device features ultra-low RON
of 0.8Ω (maximum) at 4.5V VCC and operates over the
wide VCC 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.
Power-Off Isolation (VCC=0V)
0.8Ω Maximum On Resistance (RON) for 4.5V VCC
0.25Ω Maximum RON Flatness for 4.5V VCC
Broad VCC Operating Range: 1.65V to 5.5V
Fast Turn-On and Turn-Off Times
Control Input Referenced to VIO
Break-Before-Make Enable Circuitry
0.5mm WLCSP packaging
The FSA2859 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 VIO and VCC. The VIO supply operates the
control circuitry, allowing for 1.8V (typical) signals on
the control pin (Sn).
ESD Performance
-
-
-
HBM: JESD22-A114, I/O to GND
CDM: JESD22-C101
8kV
500V
IEC61000-4-2 Contact / Air
8kV / 15kV
Applications
IMPORTANT NOTE:
Cellular Phone
Portable Media Player
PDA
For additional performance information, please contact
analogswitch@fairchildsemi.com.
Ordering Information
Operating Temperature Top
Packing
Method
Part Number
Package
Eco Status
Range
Mark
12-Ball WLCSP,
0.5mm pitch
Tape and
Reel
FSA2859UCX
-40°C to +85°C
M2
Green
For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
Analog Symbols
VCC
VIO
S0
S1
Control
1B0
1B1
1A
2A
2B0
2B1
GND
Figure 1. Analog Symbol
© 2007 Fairchild Semiconductor Corporation
FSA2859 Rev. 1.0.1
www.fairchildsemi.com