ICS291PGI IDT, Integrated Device Technology Inc, ICS291PGI Datasheet

ICS291PGI

Manufacturer Part Number

ICS291PGI

Description

IC CLK SYNTH TRPL PLL 20-TSSOP

Manufacturer

IDT, Integrated Device Technology Inc

Type

Clock/Frequency Synthesizerr

Datasheet

1.ICS291PGLFT.pdf (10 pages)

Specifications of ICS291PGI

Pll

Yes with Bypass

Input

Clock, Crystal

Output

CMOS

Number Of Circuits

Ratio - Input:output

1:6

Differential - Input:output

No/No

Frequency - Max

200MHz

Divider/multiplier

Yes/Yes

Voltage - Supply

3.135 V ~ 3.465 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

20-TSSOP

Frequency-max

200MHz

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Other names

291PGI

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TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER ICS291

Description

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.

Using IDT’s VersaClock

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.

Each of the two output groups are powered by a separate

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

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

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

Crystal or

Clock Input

software to configure PLLs and

External capacitors

are required with a crystal input.

S2:S0

X1/ICLK

Oscillator

with PLL

Values

Crystal

ROM

OTP

PLL1 with

Spectrum

Spread

PLL3

PLL2

GND

VDD

Features

•

Packaged as 20-pin TSSOP – Pb-free, RoHS compliant

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

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

Advanced, low-power CMOS process

Control

Output

Enable

Divide

Logic

and

PDTS

VDDO1

VDDO2

ICS291

CLK5

CLK6

CLK1

CLK2

CLK3

CLK4

DATASHEET

REV F 051310

Related parts for ICS291PGI

ICS291PGI Summary of contents

Page 1

TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER ICS291 Description 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 designed to replace ...

Page 2

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER Pin Assignment 1 GND VDD 5 VDDO1 6 CLK1 7 CLK2 8 CLK3 9 GND 10 X1/ICLK 20 pin (173 mil) TSSOP Pin Descriptions Pin Pin ...

Page 3

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER External Components The ICS291 requires a minimum number of external components for proper operation. Series Termination Resistor Clock output traces over one inch should use series termination. To series terminate a ...

Page 4

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER Spread Spectrum Modulation can be applied as either “center spread” or “down spread”. During center spread modulation, the deviation from the target frequency is equal in the positive and negative directions. ...

Page 5

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER DC Electrical Characteristics Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature -40 to +85 C Parameter Operating Voltage VDDO Voltage Operating Supply Current Input High Voltage Input Low Voltage ...

Page 6

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER AC Electrical Characteristics Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature -40 to +85 C Parameter Input Frequency Output Frequency Output Rise/Fall Time Output Rise/Fall Time Output Rise/Fall Time ...

Page 7

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER Marking Diagrams 20 ###### YYWW 291PGL 1 20 ###### YYWW 291PGIL 1 Notes: 1. ###### is the lot number. 2. YYWW is the last two digits of the year and week ...

Page 8

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER Package Outline and Package Dimensions Package dimensions are kept current with JEDEC Publication No INDEX AREA IDT™ / ICS™ TRIPLE PLL FIELD PROG. ...

Page 9

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER Ordering Information Part / Order Number Marking 291PGLF see page 7 291PGILF 291G-XXLF 291GXXL 291GI-XXLF 291GIXXL 291G-XXLFT 291GXXL 291GI-XXLFT 291GIXXL “LF” suffix to the part number denotes Pb-Free configuration, RoHS compliant. ...

Page 10

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales 800-345-7015 408-284-8200 Fax: 408-284-2775 Corporate Headquarters Integrated Device Technology, Inc. www.idt.com © 2006 Integrated Device Technology, Inc. All rights ...

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