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Philips Semiconductors
Table 33: Dynamic characteristics: analog I/O pins (D , D ); low-speed mode
V
= 4.0 to 5.5 V; V
= 0 V; T
CC
GND
Symbol
Parameter
Driver characteristics
t
rise time
LR
t
fall time
LF
LRFM
differential rise/fall time
matching (t
V
output signal crossover voltage
CRS
Hub timing (downstream ports configured as low-speed)
t
hub differential data delay
LHDD
t
data bit width distortion after
LSOP
SOP
t
hub EOP delay relative to t
LEOPD
t
hub EOP output width skew
LHESK
[1]
Test circuit: see
Figure
22.
[2]
Excluding the first transition from Idle state.
[3]
Characterized only, not tested. Limits guaranteed by design.
Overcurrent input: OCn; power switch output: PSWn.
Reference voltage for overcurrent sensing: V
Fig 14. Overcurrent trip response timing.
9397 750 07002
Product specification
= 40 to 85 C; C
amb
Conditions
C
= 200 to 600 pF;
L
10 to 90% of V
C
= 200 to 600 pF;
L
10 to 90% of V
/t
)
LR
LF
see
Figure 19
see
Figure 19
see
Figure 20
HDD
see
Figure 20
V CC
handbook, halfpage
overcurrent
input
0 V
V CC
power switch
output
0 V
(bus-powered mode) or V
CC
Rev. 03 — 29 March 2000
= 50 pF; R
= 1.5 k on D to V
L
PU
Min
75
V
OH
OL
75
V
OH
OL
[2]
80
[2] [3]
1.3
-
[3]
60
[3]
0
[3]
300
V trip
t trip
(self-powered mode).
SP/BP
ISP1122
USB stand-alone hub
[1]
; unless otherwise specified.
TERM
Typ
Max
-
300
-
300
-
125
-
2.0
-
300
-
60
-
200
-
300
MBL032
© Philips Electronics N.V. 2000. All rights reserved.
Unit
ns
ns
%
V
ns
ns
ns
ns
34 of 48
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