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USBUF01P6のメーカーはSTMicroelectronicsです、この部品の機能は「EMI FILTER AND LINE TERMINATION FOR USB UPSTREAM PORTS」です。 |
部品番号 | USBUF01P6 |
| |
部品説明 | EMI FILTER AND LINE TERMINATION FOR USB UPSTREAM PORTS | ||
メーカ | STMicroelectronics | ||
ロゴ | |||
このページの下部にプレビューとUSBUF01P6ダウンロード(pdfファイル)リンクがあります。 Total 7 pages
®
IPAD™
USBUF01P6
EMI FILTER AND LINE TERMINATION
FOR USB UPSTREAM PORTS
APPLICATIONS
EMI Filter and line termination for USB upstream
ports on:
■ USB Hubs
■ PC peripherals
FEATURES
■ Monolithic device with recommended line
termination for USB upstream ports
■ Integrated Rt series termination and Ct
bypassing capacitors.
■ Integrated ESD protection
■ Small package size
DESCRIPTION
The USB specification requires upstream ports to
be terminated with pull-up resistors from the D+
and D- lines to Vbus. On the implementation of
USB systems, the radiated and conducted EMI
should be kept within the required levels as stated
by the FCC regulations. In addition to the
requirements of termination and EMC
compatibility, the computing devices are required
to be tested for ESD susceptibility.
The USBUF01P6 provides the recommended line
termination while implementing a low pass filter to
limit EMI levels and providing ESD protection
which exceeds IEC61000-4-2 level 4 standard.
The device is packaged in a SOT-666 which is the
smallest available lead frame package (45%
smaller than the standard SOT323).
BENEFITS
■ EMI / RFI noise suppression
■ Required line termination for USB upstream
ports
■ ESD protection exceeding IEC61000-4-2 level 4
■ High flexibility in the design of high density
boards
■ Tailored to meet USB 2.0 standard (low speed
and high speed data transmission)
SOT-666IP
(Internal Pad)
FUNCTIONAL DIAGRAM
3.3 V
Rt Rp
D1 D4
Ct
Grd 3.3 V
Rt
D2
Ct
D3
COMPLIES WITH THE FOLLOWING STANDARDS:
■ IEC61000-4-2 level4:
15kV (air discharge)
8kV (contact discharge)
■ MIL STD 883E-Method 3015-7:
Class 3 C = 100 pF R = 1500 Ω
3 positive strikes and 3 negative strikes (F = 1 Hz)
Order Codes
Part Number
USBUF01P6
Marking
U
May 2004
REV. 2
1/7
1 Page TECHNICAL INFORMATION
Fig. A1: USB Standard requirements.
Full-speed or
Low-speed USB
Transceiver
Ct
Host or
Hub port
Ct
Rt
Rt
15k 15k
D+
D-
Twisted pair shielded
Zo = 90ohms
5m max
3.3V
1.5k
D+ Rt
Rt
D-
Ct Full-speed USB
Transceiver
Ct Hub 0 or
Full-speed function
FULL SPEED CONNECTION
Full-speed or
Low-speed USB
Transceiver
Ct
Host or
Hub port
Ct
Rt
Rt
15k 15k
D+
D-
Untwisted unshielded
3m max
3.3V
1.5k
D+ Rt
Rt
D-
Ct Low-speed USB
Transceiver
Ct Hub 0 or
Low-speed function
LOW SPEED CONNECTION
USBUF01P6
APPLICATION EXAMPLE
Fig. A2: Implementation of ST' solutions for USB ports.
Downstream port
D+
Gnd
D-
USBDF01W5
D+ in
Rt
Ct Rd
CABLE
D+ out D+
D+
Gnd
D- in
Ct Rd
Rt
D- out
D-
D-
USBUF01W6
D2 Gnd D1
Upstream port
D+
Ct
Rt
D3
Ct
Rt
3.3 V
Rp
3.3V D4
D-
FULL SPEED CONNECTION
Downstream port
D+
Gnd
D-
USBDF01W5
D+ in
Rt
Ct Rd
CABLE
D+ out D+
D+
Gnd
D- in
Ct Rd
Rt
D- out
D-
D-
USBUF01W6
D2 Gnd D1
Ct
Rt
D3
Ct
Rt
3.3 V
Rp
3.3V D4
Upstream port
D+
D-
LOW SPEED CONNECTION
3/7
®
3Pages USBUF01P6
Fig. A7: Remaining voltage at both stages S1 (Vinput) and S2 (Voutput) during ESD surge.
a: Positive surge
b: Negative surge
Please note that the USBUF01P6 is not only acting for positive ESD surges but also for negative ones.
For these kinds of disturbances it clamps close to ground voltage as shown in fig. A7b.
ORDERING INFORMATION
Part Number
USBUF01P6
Marking
U
Package
SOT-666IP
Weight
2.9 mg
Base qty
3000
Delivery
mode
Tape & reel
REVISION HISTORY
Table 1: Revision history
Date
September-2003
01-Juin-2004
Revision
1
2
Description of Changes
First issue
SOT-666 Internal Pad version package change
6/7
®
6 Page | |||
ページ | 合計 : 7 ページ | ||
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部品番号 | 部品説明 | メーカ |
USBUF01P6 | EMI FILTER AND LINE TERMINATION FOR USB UPSTREAM PORTS | STMicroelectronics |