LX7203-XX MICROSEMI [Microsemi Corporation], LX7203-XX Datasheet - Page 3

• Manufacturer Part Number: LX7203-XX
• Description: EMI Filter & ESD Protection for Up Stream USB Ports
• Manufacturer: MICROSEMI [Microsemi Corporation]

Copyright  2002
Rev. 1.0a, 2002-10-22
specification for device termination, EMI filtering and ESD
protection. The R
termination; the C
fall slew; the TVS diodes protect the IC from ESD damage;
and the total capacitance and resistance creates a low pass
filter eliminating the high frequency energy from the circuit.
The LX7203 can configure the upstream port for either Full-
Speed or Low-Speed operation. The figures below show the
proper connection in accordance with the USB v1.1
specification.
The LX7203 meets the requirements of the USB v1.1
Transceiver
USB
I N T E G R A T E D
Host or Hub (downstream port)
EDGE
S
Transceiver
resistor provides the proper signal
capacitor controls the signal rise and
Host
USB
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
GND
4
6
5
cable
P R O D U C T S
LX7201
Figure 2 – Connection for Full Speed Operation
C
R
GND
V
C
S
A P P L I C A T I O N I N F O R M A T I O N
BUS
R
D+
D-
R
PD
R
S
PD
A P P L I C A T I O N C I R C U I T S
Figure 1 – Typical Application
V
1
3
2
BUS
Integrated Products Division
from connector
from connector
GND
Microsemi
D
D
IN
IN
1
2
EMI Filter & ESD Protection for Up Stream USB
3
F
rate known as Full-Speed which requires a 1.5 kΩ pull-up
resistor to be connected to the D+ line. Slew rate control
is accomplished with C
before the R
ULL
LX7203
The USB specification offers a 12 Mbps data transfer
Voltage Supply (Vbus) is connected to Pin 5
Ground is connected to Pin 2
D+ from the connector is routed to Pin 1 (1.5 kΩ pull-up
resistor) and Pin 6 to the D+ line of the USB
Transceiver
D- from the connector is routed to Pin 3 and Pin 4 to
the D- line of the USB Transceiver
R
PU
S
GND
PEED
3
2
1
4
6
5
S
D
to IC
V
P
D
to IC
D
.
OUT
BUS
OUT
Peripheral (upstream port)
RODUCTION
EVICE
LX7203
R
PU
(F
R
R
C
C
S
S
IGURE
Ports
EDGE
D
Transceiver
V
GND
D+
D-
Peripheral
BUS
ATA
attached to the transceiver
2)
USB
6
5
4
V
BUS
S
HEET
Transceiver
LX7203-xx
USB
Page 3