FSUSB42_12 Datasheet, PDF (1/10 Pages) Fairchild Semiconductor – Low-Power, Two-Port, Hi-Speed, USB2.0 (480Mbps) UART Switch

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February 2012
FSUSB42 — Low-Power, Two-Port, Hi-Speed,
USB2.0 (480Mbps) UART Switch
Features
 Low On Capacitance: 3.7pF Typical
 Low On Resistance: 3.9Ω Typical
 Low Power Consumption: 1μA Maximum
- 15μA Maximum I_CCT over an Expanded Voltage
Range (V_IN=1.8V, V_CC=4.4V)
 Wide -3db Bandwidth: > 720MHz
 Packaged in:
- 10-Lead UMLP (1.4 x 1.8mm)
- 10-Lead MSOP
 8kV ESD Rating, >16kV Power/GND ESD Rating
 Over-Voltage Tolerance (OVT) on all USB Ports
Up to 5.25V without External Components
Applications
 Cell phone, PDA, Digital Camera, and Notebook
 LCD Monitor, TV, and Set-Top Box
IMPORTANT NOTE:
For additional performance information, please contact
[e-mail].
Description
The FSUSB42 is a bi-directional, low-power, two-port,
Hi-Speed, USB2.0 switch. Configured as a double-pole,
double-throw switch (DPDT) switch, it is optimized for
switching between two Hi-Speed (480Mbps) sources or
a Hi-Speed and Full-Speed (12Mbps) source.
The FSUSB42 is compatible with the requirements of
USB2.0 and features an extremely low on capacitance
(C_ON) of 3.7pF. The wide bandwidth of this device
(720MHz) exceeds the bandwidth needed to pass the
third harmonic, resulting in signals with minimum edge
and phase distortion. Superior channel-to-channel
crosstalk also minimizes interference.
The FSUSB42 contains special circuitry on the switch
I/O pins for applications where the V_CC supply is
powered-off (V_CC=0), which 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 SEL pin is lower than
the supply voltage (V_CC). This feature is especially
valuable to ultra-portable applications, such as cell
phones, allowing for direct interface with the general-
purpose I/Os of the baseband processor. Other
applications include switching and connector sharing in
portable cell phones, PDAs, digital cameras, printers,
and notebook computers.
Ordering Information
Part Number
FSUSB42UMX
FSUSB42MUX
Top Mark
Operating Temperature
Range
Package
HE
-40 to +85°C
10-Lead, Quad, Ultrathin Molded Leadless Package
(UMLP), 1.4 x 1.8mm
FSUSB42
-40 to +85°C
10-Lead, Molded Small Outline Package (MSOP)
JEDEC MO-187, 3.0mm Wide
MicroPak™ is a trademark of Fairchild Semiconductor Corporation.
HSD1+
D+
HSD2+
HSD1-
D-
HSD2-
Sel Control /OE
© 2007 Fairchild Semiconductor Corporation
FSUSB42 • Rev. 1.1.5
Figure 1. Analog Symbol
www.fairchildsemi.com