September 2009
FSA1211 — Low-Power, Twelve-Port, High-Speed
Isolation Switch
Features
Description
The FSA1211 is a low-power, twelve-port, high-speed
switch. This part is configured as a single-pole, single-
throw switch (SPST) and is optimized for isolating a
high-speed source, such as a cell phone camera
interface. The FSA1211 features an extremely low on
Low COFF Capacitance: 2.0pF Typical
Low On Resistance: 7.5Ω Typical
Low Power Consumption: 1μA Maximum
10μA Maximum ICCT over an Expanded Voltage
Range (VIN=2.6V, VCC=4.3V)
capacitance (CON
)
of 6pF. The wide bandwidth
(>720MHz) exceeds the bandwidth needed to pass the
third harmonic, resulting in signals with minimum edge
and phase distortion. Superior channel-to-channel
crosstalk minimizes interference.
Wide -3db Bandwidth: > 720MHz
Packaged in Space-Saving 28-Lead UMLP
5.5kV ESD Rating; >9kV Power/GND ESD Rating
Low On Capacitance: 6pF Typical
The FSA1211 contains special circuitry on pins A and B
that allows the device to withstand an over-voltage
condition. This device is designed to minimize current
consumption even when the control voltage applied to
the /OE pin is lower than the supply voltage (VCC). This
feature is especially valuable for mobile applications,
such as cell phones, allowing direct interface with the
general-purpose I/Os of the baseband processor. Other
applications include port isolation and switching in
portable cell phones, PDAs, digital cameras, printers,
and notebook computers.
Applications
Cell phone, PDA, Digital Camera, and Notebook
LCD Monitor, TV, and Set-Top Box
IMPORTANT NOTE:
For additional performance information, please contact
analogswitch@fairchildsemi.com.
Ordering Information
Top
Operating
Part Number
Package
Eco Status
Green
Mark Temperature Range
28-Lead, Quad, Ultra-thin Molded Leadless
Package (UMLP), 3.5x4mm
FSA1211UMX F1211
FSA1211UDMX F1211
-40 to +85°C
-40 to +85°C
28-Lead, Quad, Dual-Row, Ultra-thin Molded
Leadless Package (UMLP), 3.6x2.9mm
Green
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
Camera
12A11A10A 9A 8A 7A 6A 5A 4A 3A 2A 1A
/OE
VCC
12B11B10B
9B 8B 7B 6B 5B 4B 3B 2B 1B
Camera
Baseband Processor
Figure 1. Analog Symbol
© 2008 Fairchild Semiconductor Corporation
FSA1211 • Rev. 1.0.6
www.fairchildsemi.com