ICS348R-22LF datasheet(1/8 Pages) ICST

Part #	ICS348R-22LF

Description	Quad PLL Field Programmable VersaClock Synthesizer

PDF	8 Pages

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Manufacturer	ICST [Integrated Circuit Systems]

Direct Link	http://www.icst.com

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ICS348-22

MDS 348-22 A

1

Revision 120704

Integrated Circuit Systems, Inc.

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

Quad PLL Field Programmable VersaClock Synthesizer

PRELIMINARY INFORMATION

Description

The ICS348-22 field programmable clock synthesizer

generates up to 9 high-quality, high-frequency clock

outputs including multiple reference clocks from a low

frequency crystal or clock input. The ICS348-22 has

four independent on-chip PLLs and is designed to

replace crystals and crystal oscillators in most

electronic systems.

Using ICS’ VersaClockTM software to configure PLLs

and outputs, the ICS348-22 contains a One-Time

Programmable (OTP) ROM to allow field

programmability. Programming features include eight

selectable configuration registers, up to two sets of four

low-skew outputs.

Using Phase-Locked Loop (PLL) techniques, the

device runs from a standard fundamental mode,

inexpensive crystal, or clock. It can replace multiple

crystals and oscillators, saving board space and cost.

Features

• Packaged as 20-pin SSOP (QSOP)

• Eight addressable registers

• Replaces multiple crystals and oscillators

• Output frequencies up to 189 MHz at 3.3 V

• Input crystal frequency of 25 MHz

• Up to nine reference outputs

• Up to two sets of four low-skew outputs

• Operating voltages of 3.3 V

• Advanced, low power CMOS process

• Available in Pb (lead) free packaging

Block Diagram

Crystal

Oscillator

PLL1

GND

2

3

VDD

PDTS

PLL2

PLL3

Divide

Logic

and

Output

Enable

Control

S2:S0

CLK1

CLK9

CLK8

CLK7

CLK6

CLK5

CLK4

CLK3

CLK2

3

OTP

ROM

with PLL

Values

PLL4

X2

25 MHz

crystal input

External capacitors are

required with a crystal input.

X1

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ICS348R-22LF Datasheet(PDF) 1 Page - Integrated Circuit Systems

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