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ISP1521 Datasheet(PDF) 12 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) 12 Page - NXP Semiconductors

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Philips Semiconductors
ISP1521
Hi-Speed USB hub controller
Product data
Rev. 03 — 24 November 2004
12 of 53
9397 750 13702
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
The triggering voltage of the POR circuit is 2.03 V nominal. A POR is automatically
generated when VCC goes below the trigger voltage for a duration longer than 1 µs.
At t1: clock is running and available.
Fig 3.
Power-on reset timing.
Stable external clock is to be available at A.
Fig 4.
External clock with respect to power-on reset.
004aaa388
t1
VCC
2.03 V
0 V
≤ 683 µs
POR
POR
EXTERNAL CLOCK
A
004aaa365



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