ICS270PGI Datasheet

IC型号：
ICS270PGI
PDF描述：
Triple PLL Field Programmable VCXO Clock Synthesizer
文件大小：
163.56KB
PDF页数：
8页
芯片厂家：
ICS

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PRELIMINARY INFORMATION

ICS270

Triple PLL Field Programmable VCXO Clock Synthesizer

Description

The ICS270 field programmable VCXO clock

synthesizer generates up to eight high-quality,

high-frequency clock outputs including multiple

reference clocks from a low-frequency crystal input. It

is designed to replace crystals and crystal oscillators in

most electronic systems.

Using ICS鈥?/div>

software to configure PLLs

and outputs, the ICS270 contains a One-Time

Programmable (OTP) ROM for field programmability.

Programming features include VCXO, eight selectable

configuration registers and 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 VCXOs,

multiple crystals and oscillators, saving board space

and cost.

The ICS270 is also available in factory programmed

custom versions for high-volume applications.

VersaClock

Features

鈥?/div>

Packaged as 20-pin TSSOP

Eight addressable registers

Replaces multiple crystals and oscillators

Output frequencies up to 200 MHz at 3.3 V

Input crystal frequency of 5 to 27 MHz

Up to eight reference outputs

Up to two sets of four low-skew outputs

Operating voltages of 3.3 V

Controllable output drive levels

Advanced, low-power CMOS process

Available in Pb (lead) free packaging

Block Diagram

VDD

S2:S0

OTP

ROM

with

PLL

Values

CLK1

PLL1

CLK2

Divide

Logic

and

Output

Enable

Control

CLK3

CLK4

CLK5

CLK6

CLK7

CLK8

PLL2

VIN

PLL3

Crystal

External capacitors

are required.

Voltage

Controlled

Crystal

Oscillator

GND

PDTS

MDS 270 B

Integrated Circuit Systems, Inc.

鈼?/div>

525 Race Street, San Jose, CA 95126

鈼?/div>

Revision 040705

tel (408) 297-1201

鈼?/div>

www.icst.com

产品变化通告
Product Discontinuation 13/May/2009
标准包装
72
类别
集成电路 (IC)
家庭
时钟/计时 - 时钟发生器，PLL，频率合成器
系列
VersaClock™
类型
时钟/频率合成器，扇出缓冲器（分配）
PLL
带旁路
输入
晶体
输出
CMOS
电路数
1
比率 - 输入:输出
1:8
差分 - 输入:输出
无/无
频率 - 最大
200MHz
除法器/乘法器
是/是
电源电压
3.135 V ~ 3.465 V
工作温度
-40°C ~ 85°C
安装类型
表面贴装
封装/外壳
20-TSSOP（0.173"，4.40mm 宽）
供应商设备封装
20-TSSOP
包装
管件
其它名称
270PGI

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