ICS291PGIT

ICS291PGIT Datasheet

TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER ICS291

Part	Datasheet
ICS291PGIT	ICS291PGIT (pdf)

Related Parts	Information
ICS291PGT	ICS291PGT
ICS291PG	ICS291PG
ICS291PGI	ICS291PGI

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DATASHEET TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER ICS291 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 VersaClockTM 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. Each of the two output groups are powered by a separate VDDO voltage. VDDO may vary from 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. • Packaged as 20-pin TSSOP • Eight addressable registers • Replaces multiple crystals and oscillators • Output frequencies up to 200 MHz at 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 to V VDDO output level controls for each bank of 3 outputs • Up to two sets of three low-skew outputs • Operating voltages of 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 Block Diagram 3 S2:S0 OTP ROM with PLL Values X1/ICLK Crystal or Clock Input Crystal Oscillator External capacitors are required with a crystal input. VDD 3 PLL1 with Spread Spectrum PLL2 PLL3 Divide Logic and Output Enable Control VDDO1 CLK1 CLK2 CLK3 CLK4 CLK5 CLK6 3 GND PDTS VDDO2 IDT / ICS TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER 1 ICS291 ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER Pin Assignment EPROM CLOCK SYNTHESIZER GND 1 S0 2 S1 3 VDD 4 VDDO1 5 CLK1 6 CLK2 7 CLK3 8 GND 9 X1/ICLK 10 20 S2 19 VDD 18 PDTS 17 GND 16 CLK6 15 CLK5 14 CLK4 13 VDDO2 12 VDD 11 X2 20 pin 173 mil TSSOP Pin Descriptions Ordering Information Part / Order Number 291PG* 291PGI* 291PGLF 291PGILF 291G-XX* 291GI-XX* 291G-XXLF 291GI-XXLF 291G-XXT* 291GI-XXT* 291G-XXLFT 291GI-XXLFT Marking See page 7 291G-XX 291GIXX 291GXXL 291GIXXL 291G-XX 291GIXX 291GXXL 291GIXXL Shipping Packaging Tubes Tape and Reel Tape and Reel Tape and Reel Tape and Reel Package 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP Temperature 0 to +70° C -40 to +85° C 0 to +70° C -40 to +85° C 0 to +70° C -40 to +85° C 0 to +70° C -40 to +85° C 0 to +70° C -40 to +85° C 0 to +70° C -40 to +85° C *NOTE EOL for non-green parts to occur on 5/13/10 per PDN U-09-01 Parts that are ordered with a “LF” suffix to the part number are the Pb-Free configuration and are RoHS compliant. The 291G-XX, 291G-XXLF, 291GI-XX, and 291GI-XXLF are factory programmed versions of the 291PG, 291PGLF, 291PGI, and 291PGILF. A unique “-XX” suffix is assigned by the factory for each custom configuration, and a separate data sheet is kept on file. For more information on custom part numbers programmed at the factory, please contact your local IDT sales and marketing representative. While the information presented herein has been checked for both accuracy and reliability, IDT assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments. VersaClockTM is a trademark of IDT, Inc. All rights reserved. IDT / ICS TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER 9 ICS291 ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER EPROM CLOCK SYNTHESIZER Innovate with IDT and accelerate your future networks. Contact: For Sales 800-345-7015 408-284-8200 Fax 408-284-2775 For Tech Support Corporate Headquarters Integrated Device Technology, Inc. 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. Printed in USA ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER EPROM CLOCK SYNTHESIZER IDT / ICS TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER 11 ICS291

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DATASHEET

TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER ICS291

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 VersaClockTM 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.

Each of the two output groups are powered by a separate VDDO voltage. VDDO may vary from 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.
• Packaged as 20-pin TSSOP
• Eight addressable registers
• Replaces multiple crystals and oscillators
• Output frequencies up to 200 MHz at 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 to V VDDO output level controls for
each bank of 3 outputs
• Up to two sets of three low-skew outputs
• Operating voltages of 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

Block Diagram
3 S2:S0

OTP ROM with PLL Values

X1/ICLK

Crystal or Clock Input

Crystal Oscillator

External capacitors are required with a crystal input.

VDD 3 PLL1 with

Spread Spectrum

PLL2

PLL3

Divide Logic and Output Enable Control

VDDO1

CLK1 CLK2 CLK3

CLK4 CLK5 CLK6
3 GND

PDTS

VDDO2

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

ICS291

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER

Pin Assignment

EPROM CLOCK SYNTHESIZER

GND 1 S0 2 S1 3

VDD 4 VDDO1 5

CLK1 6 CLK2 7 CLK3 8 GND 9 X1/ICLK 10
20 S2 19 VDD 18 PDTS 17 GND 16 CLK6 15 CLK5 14 CLK4 13 VDDO2 12 VDD 11 X2
20 pin 173 mil TSSOP

Pin Descriptions
Ordering Information

Part / Order Number
291PG* 291PGI* 291PGLF 291PGILF 291G-XX* 291GI-XX* 291G-XXLF 291GI-XXLF 291G-XXT* 291GI-XXT* 291G-XXLFT 291GI-XXLFT

Marking

See page 7
291G-XX 291GIXX 291GXXL 291GIXXL 291G-XX 291GIXX 291GXXL 291GIXXL

Shipping Packaging

Tubes Tape and Reel Tape and Reel Tape and Reel Tape and Reel

Package
20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP 20-pin TSSOP

Temperature
0 to +70° C -40 to +85° C 0 to +70° C -40 to +85° C 0 to +70° C -40 to +85° C 0 to +70° C -40 to +85° C 0 to +70° C -40 to +85° C 0 to +70° C -40 to +85° C
*NOTE EOL for non-green parts to occur on 5/13/10 per PDN U-09-01

Parts that are ordered with a “LF” suffix to the part number are the Pb-Free configuration and are RoHS compliant.

The 291G-XX, 291G-XXLF, 291GI-XX, and 291GI-XXLF are factory programmed versions of the 291PG, 291PGLF, 291PGI, and 291PGILF. A unique “-XX” suffix is assigned by the factory for each custom configuration, and a separate data sheet is kept on file. For more information on custom part numbers programmed at the factory, please contact your local IDT sales and marketing representative.

While the information presented herein has been checked for both accuracy and reliability, IDT assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments. VersaClockTM is a trademark of IDT, Inc. All rights reserved.

IDT / ICS TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER 9

ICS291

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER

EPROM CLOCK SYNTHESIZER

Innovate with IDT and accelerate your future networks. Contact:

For Sales
800-345-7015 408-284-8200 Fax 408-284-2775

For Tech Support

Corporate Headquarters

Integrated Device Technology, Inc.
2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. Printed in USA

ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER

EPROM CLOCK SYNTHESIZER

IDT / ICS TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER 11

ICS291

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived ICS291PGIT Datasheet file may be downloaded here without warranties.

Datasheet ID: ICS291PGIT 636974