参数资料
型号: ISP1520BD,557
厂商: NXP SEMICONDUCTORS
元件分类: 总线控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封装: 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64
文件页数: 32/54页
文件大小: 288K
代理商: ISP1520BD,557
ISP1520_4
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 04 — 28 April 2006
37 of 53
Philips Semiconductors
ISP1520
Hi-Speed USB hub controller
[1]
Excluding the rst transition from Idle state.
[2]
Characterized only, not tested. Limits guaranteed by design.
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 specied.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Driver characteristics
tLR
rise time
75
-
300
ns
tLF
fall time
75
-
300
ns
tLRFM
rise and fall time matching
-
125
%
VCRS
output signal crossover voltage
-
2.0
V
Hub timing (downstream ports congured as full-speed)
tLHDD
hub differential data delay
-
300
ns
tLSOP
data bit width distortion after SOP
60
-
+60
ns
tLEOPD
hub EOP delay relative to tHDD
-
200
ns
tLHESK
hub EOP output width skew
300
-
+300
ns
TPERIOD is the bit duration corresponding to the USB data rate.
Fig 10. Source differential data jitter
mgr870
TPERIOD
differential
data lines
crossover point
consecutive
transitions
N
× TPERIOD + tDJ1
paired
transitions
N
× TPERIOD + tDJ2
+3.3 V
0 V
TPERIOD is the bit duration corresponding to the USB data rate.
Full-speed timing symbols have a subscript prex ‘F’, low-speed timing a prex ‘L’.
Fig 11. Source differential data-to-EOP transition skew and EOP width
mgr776
TPERIOD
differential
data lines
crossover point
differential data to
SE0/EOP skew
N
× TPERIOD + tDEOP
source EOP width: tEOPT
receiver EOP width: tEOPR
crossover point
extended
+3.3 V
0 V
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