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ISP1521 Datasheet(PDF) 47 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) 47 Page - NXP Semiconductors

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Philips Semiconductors
ISP1521
Hi-Speed USB hub controller
Product data
Rev. 03 — 24 November 2004
47 of 53
9397 750 13702
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
18. Test information
(1) Transmitter: connected to 50
Ω inputs of a high-speed differential oscilloscope.
Receiver: connected to 50
Ω outputs of a high-speed differential data generator.
Fig 21. High-speed transmitter and receiver test circuit.
(1) CL = 50 pF for full-speed.
Fig 22. Full-speed test circuit.
mdb273
DMn
DPn
50
Ω coax
50
Ω coax
DUT
GND
VCC
143
Ω
15.8
Ω
15.8
Ω
143
Ω
(1)
D
−
D
+
CL(1)
(1)
15 k
Ω
DPn
DMn
RPU
3.3 V
1.5 k
Ω ± 5%
DUT
mdb274
CL(1)
15 k
Ω
test point
full-
speed
test point



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