ISP1122 datasheet(45/48 Pages) PHILIPS

45 / 48 page

Philips Semiconductors

ISP1122

USB stand-alone hub

Product speciﬁcation

Rev. 03 — 29 March 2000

45 of 48

9397 750 07002

19. Revision history

Table 36: Revision history

Rev

Date

CPCN

Description

20000329

Product speciﬁcation, third version; supersedes ISP1122-02 of 4 October 1999

(9397 750 06389). Modiﬁcations:

• Table 1 “Ordering information”: table note on LQFP32 availability removed

• Table 23 “Conﬁguration bits”: values of bits C7 and C6 exchanged

• Section 12.4 “Reference circuits”: resistor value for soft turn-on RC-circuit changed from

10 k

Ω to 47 kΩ; see also Figure 10 to 13.

19991004

Product speciﬁcation, second version; supersedes initial version ISP1122-01 of

3 June 1999 (9397 750 05154). Modiﬁcations:

• Terminology made consistent: ganged power switching, global overcurrent detection

• Added note on availability of LQFP32 to Table 1 “Ordering information”

• Updated reference circuits in Section 12.4 “Reference circuits”: pull-up resistors changed

to 330 k

Ω, soft turn-on RC network: capacitor moved and changed to 0.1 µF

• Updated Figure 22 “Load impedance for D+ and D- pins.”: VCC -> Vreg(3.3).

19990603

Product speciﬁcation; initial version.

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