USBUF01P6 Datasheet, PDF (1/7 Pages) STMicroelectronics – EMI FILTER AND LINE TERMINATION FOR USB UPSTREAM PORTS

®
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
D3
Ct
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