ICS291

更新时间： 2024-10-27 05:39:03

品牌	Logo	应用领域
艾迪悌 - IDT		时钟
页数	文件大小	规格书
10页	218K
描述
TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER

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中文翻译

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数据手册

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ICS291 数据手册

PRELIMINARY DATASHEET

TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER ICS291

Description

Features

The ICS291 field programmable spread spectrum clock

synthesizer generates up to six high-quality, high-frequency

clock outputs including multiple reference clocks from a

low-frequency crystal input. It is designed to replace

crystals, crystal oscillators and stand alone spread

spectrum devices in most electronic systems.

• Packaged as 20-pin TSSOP

• Eight addressable registers

• Replaces multiple crystals and oscillators

• Output frequencies up to 200 MHz at 3.3 V

• Configurable Spread Spectrum Modulation

• Input crystal frequency of 5 to 27 MHz

• Clock input frequency of 3 to 166 MHz

• Up to six reference outputs

Using ICS’ VersaClock software to configure PLLs and

outputs, the ICS291 contains a One-Time Programmable

(OTP) ROM for field programmability. Programming

features include input/output frequencies, spread spectrum

amount, eight selectable configuration registers and up to

two sets of three low-skew outputs.

• Separate 1.8 to 3.3 V VDDO output level controls for

each bank of 3 outputs

• Up to two sets of three low-skew outputs

• Operating voltages of 3.3 V

• Controllable output drive levels

Each of the two output groups are powered by a separate

VDDO voltage. VDDO may vary from 1.8 V to VDD.

• Advanced, low-power CMOS process

• Available in Pb (lead) free packaging

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.

The ICS291 is also available in factory programmed custom

versions for high-volume applications.

Block Diagram

VDDO1

VDD

PLL1 with

Spread

Spectrum

S2:S0

OTP

CLK1

CLK2

CLK3

ROM

with PLL

Values

Divide

Logic

and

Output

Enable

Control

PLL2

PLL3

CLK4

CLK5

CLK6

X1/ICLK

Crystal

Oscillator

Crystal or

Clock Input

External capacitors

are required with a crystal input.

GND

VDDO2

PDTS

IDT™ / ICS™ TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER 1

ICS291

REV D 061306

12 3 4 5 6 7...10

中文翻译

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与ICS291相关器件

型号	品牌	获取价格	描述	数据表
ICS291_10	IDT	获取价格	TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER
ICS291GI-XX	IDT	获取价格	暂无描述
ICS291GI-XXLF	IDT	获取价格	Clock Generator, 200MHz, CMOS, PDSO20, 0.173 INCH, ROHS COMPLIANT, TSSOP-20
ICS291GI-XXLFT	IDT	获取价格	Clock Generator, 200MHz, CMOS, PDSO20, 0.173 INCH, ROHS COMPLIANT, TSSOP-20
ICS291GI-XXT	IDT	获取价格	暂无描述
ICS291G-XX	IDT	获取价格	Clock Generator, 200MHz, CMOS, PDSO20, 0.173 INCH, TSSOP-20
ICS291G-XXLF	IDT	获取价格	Clock Generator, 200MHz, CMOS, PDSO20, 0.173 INCH, ROHS COMPLIANT, TSSOP-20
ICS291G-XXLFT	IDT	获取价格	暂无描述
ICS291PG	ICSI	获取价格	Triple PLL Field Prog. Spread Spectrum Clock Synthesizer
ICS291PGI	ICSI	获取价格	Triple PLL Field Prog. Spread Spectrum Clock Synthesizer