isp1521 NXP Semiconductors, isp1521 Datasheet - Page 11

• Manufacturer Part Number: isp1521
• Description: Hi-speed Universal Serial Bus Hub Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
ISP1521_4
Product data sheet
The triggering voltage of the POR circuit is 2.03 V nominal. A POR is automatically
generated when V
Fig 3. Power-on reset timing
Fig 4. External clock with respect to power-on reset
At t
Stable external clock is to be available at A.
1
: clock is running and available.
CC
goes below the trigger voltage for a duration longer than 1 s.
EXTERNAL CLOCK
Rev. 04 — 30 March 2006
2.03 V
V
0 V
CC
POR
POR
A
683 s
004aaa388
t
1
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Hi-Speed USB hub controller
004aaa365
ISP1521
11 of 55