Datasheet > ICS281PGT

ICS281PGT

更新时间： 2025-07-17 19:17:59

品牌	Logo	应用领域
瑞萨 - RENESAS		时钟晶体
页数	文件大小	规格书
10页	223K
描述
输入信号类型:时钟，晶体;输出信号类型:CMOS;元器件封装:16-TSSOP;

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中文翻译

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数据手册

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ICS281PGT 数据手册

DATASHEET

TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER ICS281

Description

Features

The ICS281 field programmable spread spectrum clock

synthesizer generates up to three 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 16-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

• Input clock frequency of 3 to 166 MHz

• Up to three reference outputs

• Operating voltages of 3.3 V

• VDDO output control from 1.8 V to 3.3 V

• Controllable output drive levels

• Advanced, low-power CMOS process

• Available in Pb (lead) free packaging

NOTE: EOL for non-green parts to occur on 5/13/10

per PDN U-09-01

Using IDT’s VersaClock software to configure PLLs and

outputs, the ICS281 contains a One-Time Programmable

(OTP) ROM for field programmability. Programming

features include input/output frequencies, spread spectrum

amount and eight selectable configuration registers.

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 ICS281 is also available in factory programmed custom

versions for high-volume applications.

Block Diagram

VDDO

VDD

PLL1 with

Spread

Spectrum

S2:S0

OTP

ROM

CLK1

CLK2

CLK3

with PLL

Values

Divide

Logic

and

Output

Enable

Control

PLL2

PLL3

Crystal or

clock input

X1/ICLK

Crystal

Oscillator

GND

External capacitors

are required with a crystal input.

PDTS

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

ICS281

REV E 083109

12 3 4 5 6 7...10

中文翻译

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