ICS680-01 datasheet(1/8 Pages) ICST

Part #	ICS680-01

Description	Networking Clock Synthesizer and Zero Delay Buffer

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Manufacturer	ICST [Integrated Circuit Systems]

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ICS680-01

MDS 680-01 F

1

Revision 020305

Integrated Circuit Systems, Inc.

● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com

Networking Clock Synthesizer and Zero Delay Buffer

Description

The ICS680-01 generates four high-frequency clock

outputs and a reference from a 25 MHz crystal or clock

input. The device includes a low-skew, single input to

four output zero delay clock buffer. It can replace

multiple crystals and oscillators, saving board space

and cost.

The device has a power-down tri-state (PDTS) pin that

place the clock outputs in a high-impedance state when

pulled low. The PDTS pin includes an internal pull-up

resistor.

Features

• Packaged in 24-pin TSSOP

• Available in Pb (lead) free package

• Replaces multiple crystals and oscillators

• Input crystal or clock frequency of 25 MHz

• Five output driver driven by external clock

• Duty cycle of 45/55

• Operating voltage of 3.3 V

• Advanced, low-power CMOS process

• Fixed output frequencies of 25 MHz and 48 MHz

• Selectable output frequencies of 24 MHz, 48 MHz,

50 MHz and 66.6666 MHz

• Qx outputs replace costly discrete buffer

• Low-skew buffer outputs (250 ps)

Block Diagram

Divide

Logic

and

Output

Enable

Control

External capacitors

may be required.

S0

VDD

CLK2

CLK1

48M

25M

Q0

5

Q2

Q3

GND

PDTS

2

X1/ICLK

X2

Crystal

Oscillator

25 MHz

Crystal or Clock

PLLA

PLLB

Q1

ICLK

S1

PLL/Buffer

PLLC

QFB

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ICS680-01 Datasheet(PDF) 1 Page - Integrated Circuit Systems

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