Philips Universal Serial Bus ISP1122 - Manual (Page 26)

Philips Semiconductors
ISP1122
USB stand-alone hub
Product specification Rev. 03 — 29 March 2000 26 of 48
9397 750 07002 © Philips Electronics N.V. 2000. All rights reserved.
Power switches 1 to 5 are low-ohmic PMOS devices as specified in Section 12.2 .
Fig 10. Mode 5: self-powered hub; individual port power switching; individual overcurrent detection.
MGR784
handbook, full pagewidth
INDV
OPTION
PSW1/GL1
PSW5/GL5/GPSW
PSW4/GL4
PSW3/GL3
SP/BP
OC5/GOC
PSW2/GL2
OC1
OC2
OC3
OC4
5 V
POWER SUPPLY
± 3%
1
−
+ VBUS
D
+
D −
GND
SHIELD
+
4.85 V(min)
+ 4.85 V(min)
+ 4.75 V
(min)
1
2
VBUS
D
+
D −
GND
SHIELD
+ 4.75 V
(min)
2
3
3
VBUS
D
+
D
−
GND
SHIELD
+ 4.75 V
(min)
VCC
GND
330 k
Ω
(5 × )
100 Ω
to
1 k
Ω
4
5
VBUS
D
+
D −
GND
SHIELD
+ 4.75 V
(min)
4
120
µ F
VBUS
D
+
D −
GND
SHIELD
+ 4.75 V
(min)
5
ferrite bead
downstream
ports
ISP1122
120
µ F
ferrite bead
120
µ F
ferrite bead
120
µ F
ferrite bead
120
µ F
ferrite bead
low-ohmic
PMOS switch
47 k
Ω
0.1 µ F
low-ohmic
PMOS switch
47 k
Ω
0.1
µ
F
low-ohmic
PMOS switch
47 k Ω
0.1 µ F
low-ohmic
PMOS switch
47 k Ω
0.1 µ F
low-ohmic
PMOS switch
47 k Ω
0.1 µ F