ICS348-22 datasheet(1/9 Pages) RENESAS

номер детали	ICS348-22

подробное описание детали	QUAD PLL CLOCK SYNTHESIZER

PDF	9 Pages

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производитель	RENESAS [Renesas Technology Corp]

домашняя страница	http://www.renesas.com

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PRELIMINARY DATASHEET

QUAD PLL CLOCK SYNTHESIZER

ICS348-22

IDT™ / ICS™ QUAD PLL CLOCK SYNTHESIZER

1

ICS348-22

REV B 012005

Description

The ICS348-22 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 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

ROM

with PLL

Values

PLL4

X2

25 MHz

crystal input

External capacitors are

required with a crystal input.

X1

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