Datasheet > ICS291

ICS291

更新时间： 2024-10-27 11:14:23

品牌	Logo	应用领域
矽成 - ICSI		时钟
页数	文件大小	规格书
8页	170K
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 INFORMATION

ICS291

Triple PLL Field Prog. Spread Spectrum Clock Synthesizer

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

Each of the two output groups are powered by a

separate VDDO voltage. VDDO may vary from 1.8 V to

VDD.

• Controllable output drive levels

• 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

MDS 291 C

Revision 062205

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

12 3 4 5 6 7 8

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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
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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