PROTECTION PRODUCTS
1www.semtech.com
PROTECTION PRODUCTS
STF203-15 THRU STF203-33
USB Upstream Port Filter and TVS
For EMI Filtering and ESD Protection
Description Features
Schematic and PIN Configuration
Revision 03/22/2006
The STF203 is a combination EMI filter and line
termination device with integrated TVS diodes for use
on upstream USB ports. It is constructed using a
proprietary technology that allows passive components
and TVS diodes to be integrated in the same package.
Each device will provide termination, filtering, and ESD
protection for one upstream USB port. The STF203 is
an easily implemented solution for meeting the
requirements of revision 1.1 of the Universal Serial Bus
specification.
Line termination is achieved with series resistors on
both the D+ and D- USB lines. The value of series
resistance added to the output impedance of the USB
driver must be as close to possible to the 45Ω
characteristic impedance of the cable (90Ω balanced)
to minimize transmission line reflections. They are
available with resistor values of 15Ω (STF203-15),
22Ω (STF203-22), and 33Ω (STF203-33). The 1.5kΩ
pull-up resistor is required by the USB specification 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 required to
bypass high frequency energy to ground and to control
the edge rate of the USB signals. The TVS diodes
provide ESD protection of both (D+ and D-) data lines
and the voltage bus (VBUS). The TVS diodes on the
input/output pins provide suppression of ESD voltages
in excess of ±15kV (air discharge) and ±8kV (contact
discharge) per IEC 61000-4-2, level 4. The TVS diode
on the VBUS pin will suppress ESD discharges in excess
of 25kV per IEC 61000-4-2.
Applications
Mechanical Characteristics
USB Ports
Cellular Handsets
PDAs
Pagers
Digital Cameras
PC Peripherals
MP3 Players
Bidirectional EMI/RFI filtering and line termination
with integrated ESD protection
ESD protection for USB power (VBUS) and data lines
(D+ and D-) to
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
Filtering and termination for one USB port
Series resistors: 15Ω, 22Ω, and 33Ω
Low TVS operating voltage (5.25V)
Low leakage current
Small SC70-6L package
Solid-state technology
EIAJ SC70-6L package
RoHS/WEEE Compliant
Molding compound flammability rating: UL 94V-0
Marking : Marking Code
Packaging : Tape and Reel per EIA 481
SC70-6L (Top View)
Circuit Diagram
.
1
5
3
6
2
4D In/Out
D In/Out D In/Out
D In/Out
22006 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
STF203-15 THRU STF203-33
Absolute Maximum Rating
Electrical Characteristics
gnitaRlobmySeulaVstinU
rewoPetatS-ydaetSP
SS
001Wm
2-4-00016CEIrepegrahcsiDriADSE
2-4-00016CEIrepegrahcsiDtcatnoCDSE V
DSE
61
01
Vk
erutarepmeTgniredloSdaeLT
L
).ces01(062C°
erutarepmeTgnitarepOT
J
521+ot04-C°
erutarepmeTegarotST
GTS
051+ot55-C°
XX-302FTS
retemaraPlobmySsnoitidnoCmuminiMlacipyTmumixaMstinU
egatloVffO-dnatSesreveRSVTV
MWR
52.5V
egatloVnwodkaerBesreveRSVTV
RB
I
t
Am1=6 V
tnerruCegakaeLesreveRSVTI
R
V
MWR
C°52=T,V52.5=
ataddnaneewteB
dnuorGdnanip)-D,+D(
5Aµ
tnerruCegakaeLesreveRSVTI
R
eniLhcaE1Aµ
)51-302FTS(ecnatsiseRseireSR
S
eniLhcaE5.31515.61smhO
)22-302FTS(ecnatsiseRseireSR
S
eniLhcaE022242smhO
)33-302FTS(ecnatsiseRseireSR
S
eniLhcaE033363smhO
ecnatsiseRpUlluPR
UP
53.15.156.1smhOk
roticapaCCeniLhcaE74Fp
ecnaticapaClatoTC
TOT
rotupnIneewteB
dnuorGrotuptuO
V
R
zHM1=f,V0=
06Fp
32006 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
STF203-15 THRU STF203-33
Typical Characteristics
ESD Clamping (8kV Contact)
Typical Insertion Loss
ESD Clamping (15kV Air)
Analog Crosstalk (D+ to D-)
CH1 S21 log MAG 20 dB/ REF 0 dB
START .030 000 MHz STOP 3 000.000 000 MHz
PRm
1
2
3
START
.
030 MHz 3
STOP 000
.
000 000 MHz
CH1 S21 LOG 3 dB / REF 0 dB
1: -20.394 dB
800 MHz
2: -15.035 dB
1.8 GHz
3: -14.781 dB
2.5 GHz
0 dB
-3 dB
-6 dB
-9 dB
-12 dB
-15 dB
-18 dB
-21 dB
-24 dB 1
GHz
100
MHz
3
GHz
10
MHz
1
MHz
42006 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
STF203-15 THRU STF203-33
Device Connection
The STF203 is designed to provide termination, EMI
filtering and ESD protection for one USB port. The
device is connected as follows:
1.1.
1.1.
1. Full-Speed Devices: For full-speed devices the
pull-up resistor is connected to the D+ line. Route
the D+ line from the connector to pin 1 of the
STF203. Pin 6 is connected to the D+ line of the
IC. Route the D- line from the connector to pin 3.
Pin 4 is connected to the D- line of the IC. Pin 5 is
connected to the voltage supply line (VBUS). Pin 2 is
connected to ground. Note that the input and
output connections may be reversed if necessary
(See Figure 3).
2.2.
2.2.
2. Low-Speed Devices::
::
: For low speed devices the
pull-up resistor is connected to the D- line. Route
the D- line from the connector to pin 1 of the
STF203. Pin 6 is connected to the D- line of the IC.
Route the D+ line from the connector to pin 3. Pin
4 is connected to the D+ line of the IC. Pin 5 is
connected to the voltage supply line (VBUS). Pin 2 is
connected to ground. Note that the input and
output connections may be reversed if necessary
(See Figure 4).
USB Port Design Considerations
The Universal Serial Bus (USB) specification requires
termination and filtering components for proper opera-
tion. In addition, an open USB socket is vulnerable to
hazardous ESD discharges in excess of 15kV. These
discharges can occur on the data lines or the voltage
bus. The STF203 is an easily implemented solution
that is designed to meet the termination and EMI filter
requirements of the USB specification revision 1.1. It
also provides ESD protection to IEC 61000-4-2,
level 4.
USB line termination is achieved with series resistors
on both the D+ and D- lines. These resistors preserve
signal integrity by matching the cable impedance to
that of the differential driver. A 1.5kΩ pull-up resistor
is used to identify an upstream port on either the D+
(full speed devices) or the D- (low speed devices) data
line. Capacitors are used for EMI suppression. TVS
diodes provide ESD protection of both (D+ and D-)
data lines and the voltage bus (VBUS). The STF203
integrates all of these components in a small SC-70
package. This integrated solution simplifies design and
requires minimal board space.
Figure 1 - Preferred Connection Diagram
(Full Speed Devices)
Applications Information
Figure 2 - Preferred Connection Diagram
(Low Speed Devices)
1
2
34
5
6
STF203
From Connector
1
2
34
5
6
STF203
From Connector
Figure 4 - Alternate Connection Diagram
(Low Speed Devices)
Figure 3 - Alternate Connection Diagram
(Full Speed Devices)
1
2
34
5
6
STF203
From Connector
1
2
34
5
6
STF203
From Connector
52006 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
STF203-15 THRU STF203-33
Outline Drawing - SC70 6L
Land Pattern - SC70 6L
ccc C
2X N/2 TIPS
2X E/2
12
N
EI E
.083 BSC
.026 BSC
6
.004
.045
.079
.049
.083
.006 -
6
0.10
1.25
2.10
2.10 BSC
0.65 BSC
.053 1.15
2.00
.012 0.15
1.35
0.30
-
1.90.075
DIM
bbb
ccc
e
L1
aaa
01
N
e1
L
c
E1
E
D
A2
A1
b
A
NOM
MILLIMETERS
DIMENSIONS
INCHES
MIN NOM MAX MIN MAX
0°
.012
-
.004
.010
.003
(.017)
.014
-
.028
.000
-
-
-
.035
0.10
0.30
8° 0° -8°
0.90
(0.42)
0.36.018
.009
0.26
0.08
.043
.039
.004 0.00
0.70
-
0.22
0.46
-
0.10
1.10
1.00
-
-
1.30 BSC.051
SEATING
aaa C
bbb C A-B D
A
bxN
A2
A1
D
A
e1 D
e
B
C
PLANE
DETAIL
L
(L1)
01
0.15
PLANE
GAGE c
A
H
SEE DETAIL A
SIDE VIEW
REFERENCE JEDEC STD MO-203, VARIATION AB.
4.
3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS
OR GATE BURRS.
-B-
CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
DATUMS AND TO BE DETERMINED AT DATUM PLANE
NOTES:
1.
2. -A- -H-
THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
NOTES:
1.
Z
X
.033
.039
(.073)
DIMENSIONS
INCHES
Y
Z
DIM
G
P
X
C
MILLIMETERS
.016
.026
.106
DIMENSIONS
INCHES
Y
Z
DIM
G
P
X
C
MILLIMETERS
(1.85)
0.40
0.85
2.70
1.00
0.65
C
P
G
Y
62006 Semtech Corp. www.semtech.com
PROTECTION PRODUCTS
STF203-15 THRU STF203-33
Contact Information
Semtech Corporation
Protection Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
Marking Ordering Information
123
456
XXX
rebmuNtraP seireS
rotsiseR
gnikraM
edoC
51-302FTS51Ω513
22-302FTS22Ω223
33-302FTS33Ω333
Note: XXX = Marking Code
rebmuNtraPhsiniFdaeL repytQ
leeR eziSleeR
CT.51-302FTSbPnS000,3”7
CT.22-302FTSbPnS000,3”7
CT.33-302FTSbPnS000,3”7
TCT.51-302FTSeerfbP000,3”7
TCT.22-302FTSeerfbP000,3”7
TCT.33-302FTSeerfbP000,3”7
Note: Pb free finish is matte tin