STF202-22T1G

STF20222T1G
http://onsemi.com
4
As previously mentioned, there are two types of
configurations for the USB port which are upstream and
downstream. If your port connects to the host either in a
direct way or through a hub, you are upstream (data flows
“up” to the host) and in the other hand, if you are the host or
your port provides access to the host then you are
downstream (data flows “down” from the host to the
device). In the case of the STF202 device, it provides
upstream termination. The Figure 7 represents the
termination for an upstream USB port.
Figure 7.
Rpu
C
C
R
S
R
S
V
CC
The USB Line termination is reached through the series
resistors placed in the D+ and D lines. These resistors
insure the proper termination to maintain the integrity of the
signal. The Pull up Resistor of 1.5 kW on either the D+ or D
data lines is used to identify the equipment as either
fullspeed or lowspeed device.
Connection for FullSpeed
and LowSpeed Devices
As mentioned before, there are two kinds of port devices:
FullSpeed devices operates in 12 Mb/s
LowSpeed devices that work in 1.5 Mb/s
The STF202 device can be shaped to be used for either
FullSpeed or LowSpeed devices which is achieved as
described below:
FullSpeed Devices
The Pull up resistor (Rpu) is connected to the D+ Line.
The terminal 1 is connected to the Voltage Supply Line
(V
BUS
) while the terminal 6 is connected to ground. The
input of the D+ line is connected in the terminal 3 which
outputs from the terminal 4. Finally, the input of the D line
is connected in the terminal 2 which outputs from the
terminal 5. The Figure 8 shows the connections of the
STF202 device for “FullSpeed devices”.
Figure 8.
GND
D
D+
STF202
6
5
4
1
2
3
USB
Controller
D
D+
5 V
Peripheral
LowSpeed Devices
The Pull up resistor (Rpu) is connected to the D Line. The
terminal 1 is connected to the Voltage Supply Line (V
BUS
)
while the terminal 6 is connected to ground. The input of the
D line is connected in the terminal 3 which outputs from the
terminal 4. Finally, the input of the D+ line is connected in
the terminal 2 which outputs from the terminal 5. The Figure
9 shows the connections of the STF202 device for
“LowSpeed devices”.
Figure 9.
GND
D+
D
STF202
6
5
4
1
2
3
USB
Controller
D+
D
5 V
Peripheral
STF20222T1G
http://onsemi.com
5
The Figure 10 describes in a simplified way what the USB
port components are. As shown in this diagram, there are
signals for upstream and downstream ports which must be
provided with Line Termination and EMI Filtering to meet
the requirements of the USB specification revision 1.1. In
addition to the Line termination and EMI Filtering, it is also
needed to protect the USB I/O Lines against ESD
conditions, so TVS devices must be added for these
purposes.
Figure 10.
XTAL1
XTAL2
DPO
DMO
V
CC
GND
DP1DP4
DM1DM4
OC1OC4
PWR1PWR4
REGULATOR
POWER
SWITCHING
GND
V
BUS
D
D+
USB Data Lines
and Power to
Downstream
Ports
To
Upstream
Ports
CLK CRISTAL
As mentioned before, the ON Semiconductor STF202
device provides “upstream termination”, EMI Filtering and
ESD Protection to IEC6100042 in an integrated solution
placed in a small and single package (TSOP6, Case 318G).
The typical application for the STF202 device is shown in
the Figure 11.
Figure 11.
D1D+
D1D
OC
PWR
DOD+
DOD
REGULATOR
TVS
V
BUS
D+
D
STF202
654
123
GND
OC
PWR
D2D+
D2D
TVS
POWER
SWITCH
V
BUS
D+
D
GND
DOWNSTREAM
TERMINATION
V
BUS
D+
D
GND
DOWNSTREAM
TERMINATION
USB CONTROLLER
STF20222T1G
http://onsemi.com
6
PACKAGE DIMENSIONS
TSOP6
CASE 318G02
ISSUE V
STYLE 8:
PIN 1. Vbus
2. D(in)-
3. D(in)+
4. D(out)+
5. D(out)-
6. GND
23
456
D
1
e
b
E1
A1
A
0.05
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH. MINIMUM
LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL.
4. DIMENSIONS D AND E1 DO NOT INCLUDE MOLD FLASH,
PROTRUSIONS, OR GATE BURRS. MOLD FLASH, PROTRUSIONS, OR
GATE BURRS SHALL NOT EXCEED 0.15 PER SIDE. DIMENSIONS D
AND E1 ARE DETERMINED AT DATUM H.
5. PIN ONE INDICATOR MUST BE LOCATED IN THE INDICATED ZONE.
c
*For additional information on our PbFree strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SOLDERING FOOTPRINT*
DIM
A
MIN NOM MAX
MILLIMETERS
0.90 1.00 1.10
A1 0.01 0.06 0.10
b 0.25 0.38 0.50
c 0.10 0.18 0.26
D 2.90 3.00 3.10
E 2.50 2.75 3.00
e 0.85 0.95 1.05
L 0.20 0.40 0.60
0.25 BSC
L2
0° 10°
1.30 1.50 1.70
E1
E
RECOMMENDED
NOTE 5
L
C
M
H
L2
SEATING
PLANE
GAUGE
PLANE
DETAIL Z
DETAIL Z
0.60
6X
3.20
0.95
6X
0.95
PITCH
DIMENSIONS: MILLIMETERS
M
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STF20222T1/D
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STF202-22T1G

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
TVS Diodes / ESD Suppressors Upstream USB Port Filter w/6V TVS
Lifecycle:
New from this manufacturer.
Delivery:
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