isp1520 NXP Semiconductors, isp1520 Datasheet - Page 37

• Manufacturer Part Number: isp1520
• Description: Hi-speed Universal Serial Bus Hub Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 45.
V
[1]
[2]
ISP1520_4
Product data sheet
Symbol
Driver characteristics
t
t
t
V
Hub timing (downstream ports configured as full-speed)
t
t
t
t
LR
LF
LRFM
LHDD
LSOP
LEOPD
LHESK
CC
Fig 10. Source differential data jitter
Fig 11. Source differential data-to-EOP transition skew and EOP width
CRS
= 3.0 V to 3.6 V; T
Excluding the first transition from Idle state.
Characterized only, not tested. Limits guaranteed by design.
T
T
Full-speed timing symbols have a subscript prefix ‘F’, low-speed timing a prefix ‘L’.
differential
data lines
PERIOD
PERIOD
3.3 V
Parameter
rise time
fall time
rise and fall time matching
output signal crossover voltage
hub differential data delay
data bit width distortion after SOP
hub EOP delay relative to t
hub EOP output width skew
3.3 V
Dynamic characteristics: low-speed source electrical characteristics
0 V
differential
data lines
0 V
is the bit duration corresponding to the USB data rate.
is the bit duration corresponding to the USB data rate.
T
PERIOD
T
PERIOD
amb
= 40 C to +70 C; test circuit
crossover point
crossover point
N
N
HDD
differential data to
consecutive
SE0/EOP skew
T
transitions
T
PERIOD
PERIOD
t
Conditions
see
see
see
see
DJ1
t
DEOP
Rev. 04 — 28 April 2006
Figure 14
Figure 14
Figure 15
Figure 15
N
T
transitions
Figure
PERIOD
paired
22; unless otherwise specified.
t
DJ2
crossover point
crossover point
extended
[1][2]
[1]
[2]
[2]
[2]
Min
75
75
80
1.3
-
0
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Hi-Speed USB hub controller
source EOP width: t
receiver EOP width: t
60
300
crossover point
Typ
-
-
-
-
-
-
-
-
ISP1520
EOPT
EOPR
Max
300
300
125
2.0
300
+60
200
+300
mgr776
mgr870
Unit
ns
ns
%
V
ns
ns
ns
ns
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