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USBDFXXW5(2000) 데이터 시트보기 (PDF) - STMicroelectronics
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USBDFXXW5
(Rev.:2000)
EMI FILTER AND LINE TERMINATION FOR USB DOWNSTREAM PORTS
STMicroelectronics
USBDFXXW5 Datasheet PDF : 9 Pages
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APPLICATION INFORMATION
USBDFxxW5
Fig. A1:
USB Standard requirements
Rt
D+
Full-speed or
Low-speed USB
Ct
Transceiver
Rt
D-
Host or
Ct 15k 15k
Hub port
Twisted pair shielded
Zo = 90ohms
5m max
+Vbus
1.5k
D+
Rt
Rt
D-
Ct
Full-speed USB
Transceiver
Ct
Hub 0 or
Full-speed function
FULL SPEED CONNECTION
Rt
D+
Full-speed or
Low-speed USB
Ct
Transceiver
Rt
D-
Host or
Ct 15k 15k
Hub port
Untwisted unshielded
3m max
+Vbus
1.5k
D+
Rt
Rt
D-
Ct
Low-speed USB
Transceiver
Ct
Hub 0 or
Low-speed function
LOW SPEED CONNECTION
APPLICATION EXAMPLE
Downstream port
Upstream port
Host/Hub USB
port transceiver
D+ (1)
D+
CABLE
D- (2)
USBDF
xxW5
+Vbus
USBUF
xxW6
D-
D- (1)
D+ (2)
(1) for a low-speed port
(2) for a full-speed port
Peripheral
transceiver
3/9
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