ICS841S01BGLF datasheet(11/16 Pages) IDT

Part #	ICS841S01BGLF

Description	PCI EXPRESS??CLOCK GENERATOR

PDF	16 Pages

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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11 / 16 page

IDT™ / ICS™ PCI EXPRESS CLOCK GENERATOR

ICS841S01BG REV. B MAY 23, 2007

ICS841S01

PCI EXPRESS™ CLOCK GENERATOR

PRELIMINARY

INPUTS:

LVCMOS CONTROL PINS

All control pins have internal pull-ups or pull-downs; additional

resistance is not required but can be added for additional

protection. A 1k

Ω resistor can be used.

RECOMMENDATIONS FOR UNUSED INPUT PINS

OUTPUT DRIVER CURRENT

The ICS841S01 outputs are HCSL current drive with the cur-

rent being set with a resistor from I

REF to ground. For a 50Ω pc

board trace, the drive current would typically be set with a R

REF

of 475

Ω which products an I

REF of 2.32mA. The IREF is multiplied

by a current mirror to an output drive of 6*2.32mA or 13.92mA.

See Figure 3 for current mirror and output drive details.

FIGURE 3. HCSL CURRENT MIRROR AND OUTPUT DRIVE

IREF

RREF

ICS841S01BGLF Datasheet(PDF) 11 Page - Integrated Device Technology