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ISP1521 Datasheet(PDF) 40 Page - NXP Semiconductors

Part # ISP1521
Description  Hi-Speed Universal Serial Bus hub controller
PDF  53 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

ISP1521 Datasheet(HTML) 40 Page - NXP Semiconductors

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Philips Semiconductors
ISP1521
Hi-Speed USB hub controller
Product data
Rev. 03 — 24 November 2004
40 of 53
9397 750 13702
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
[1]
Excluding the first transition from idle state.
[2]
Characterized only, not tested. Limits guaranteed by design.
[1]
Excluding the first transition from idle state.
[2]
Characterized only, not tested. Limits guaranteed by design.
tFSOP
data bit width distortion after SOP
see Figure 14
−5
-
+5
ns
tFEOPD
hub EOP delay relative to tHDD
see Figure 15
0
-
15
ns
tFHESK
hub EOP output width skew
see Figure 15
−15
-
+15
ns
Table 44:
Dynamic characteristics: full-speed source electrical characteristics…continued
VCC = 3.0 V to 3.6 V; Tamb = −40 °Cto+70 °C; test circuit Figure 22; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Table 45:
Dynamic characteristics: low-speed source electrical characteristics
VCC = 3.0 V to 3.6 V; Tamb = −40 °Cto+70 °C; test circuit Figure 22; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Driver characteristics
tLR
rise time
75
-
300
ns
tLF
fall time
75
-
300
ns
tLRFM
differential rise and fall time
matching
[1] 80
-
125
%
VCRS
output signal crossover voltage
[1][2] 1.3
-
2.0
V
Hub timing (downstream ports configured as full-speed)
tLHDD
hub differential data delay
see Figure 14
-
-
300
ns
tLSOP
data bit width distortion after SOP
see Figure 14
[2]
−60
-
+60
ns
tLEOPD
hub EOP delay relative to tHDD
see Figure 15
[2] 0
-
200
ns
tLHESK
hub EOP output width skew
see Figure 15
[2]
−300
-
+300
ns
TPERIOD is the bit duration corresponding with the USB data rate.
Fig 10. Source differential data jitter.
mgr870
TPERIOD
differential
data lines
crossover point
crossover point
crossover point
consecutive
transitions
N
× TPERIOD + tDJ1
paired
transitions
N
× TPERIOD + tDJ2
+3.3 V
0 V



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