on upstream USB ports. It is constructed using a
and TVS diodes to be integrated in the same package.
for one upstream USB port. The STF203-
specification.
resistors on both the D+ and D- USB lines. These
impedance to that of the differential driver. The 1.5k鈩?/div>
pull-up resistor completes the termination circuit on
each line. This resistor is required by the USB specifi-
cation to identify the equipment as either a full-speed
(connected to D+ line) or low-speed (connected to D-
line) device. The 47pF capacitors are used to bypass
high frequency energy to ground and for edge rate
control of the USB signals. Finally, the STF203-22
contains TVS diodes for ESD protection of both (D+ &
D-) data lines and the voltage bus (V
BUS
). The TVS
diodes provide effective suppression of ESD voltages
in excess of 15kV (air discharge) and 8kV (contact
discharge) per IEC 61000-4-2, level 4.
The small size and integrated feature of the STF203-
22 minimizes required board space. The STF203-22 is
suitable for use in USB hubs, computers, peripherals,
and portable devices.
STF203-22
Features
u
Bidirectional EMI/RFI filtering and line termination
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
with integrated ESD protection
ESD protection for USB power (V
BUS
) and data lines
(D+ & D-) to
IEC 61000-4-2 Level 4
Filtering and termination for two USB data lines
Series resistors for impedance matching
Low TVS operating voltage (5.25V)
Low leakage current
Small SC70-6L package
Solid-state technology
Mechanical Characteristics
EIAJ SC70-6L package
Molding compound flammability rating: UL 94V-0
Marking : Marking Code
Packaging : Tape and Reel per EIA 481
Applications
USB Ports
Portable electronics
Cellular Handsets
PDA
Pagers
Digital Cameras
Peripherals
Notebook, and Handheld Computers
Circuit Diagram
Schematic & PIN Configuration
1
6
D (From Connector)
D (To IC)
5
.
2
3
4
D (From Connector)
D (To IC)
SC70-6L (Top View)
Revision 11/16/2001
1
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