ICS281PG

ICS281PG Datasheet

TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER ICS281

Part	Datasheet
ICS281PG	ICS281PG (pdf)

Related Parts	Information
ICS281PGT	ICS281PGT
ICS281PGI	ICS281PGI
ICS281PGIT	ICS281PGIT

PDF Datasheet Preview
DATASHEET TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER ICS281 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. Using IDT’s VersaClockTM 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. • Packaged as 16-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 • Input clock frequency of 3 to 166 MHz • Up to three reference outputs • Operating voltages of V • VDDO output control from V to 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 Crystal or clock input X1/ICLK Crystal Oscillator External capacitors are required with a crystal input. VDD 3 PLL1 with Spread Spectrum PLL2 PLL3 VDDO Divide Logic and Output Enable Control GND 3 PDTS CLK1 CLK2 CLK3 IDT / ICS TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER 1 ICS281 ICS281 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER Pin Assignment GND 1 S0 2 S1 3 VDD 4 VDDO 5 CLK1 6 GND 7 X1/ICLK 8 16 S2 15 VDD 14 PDTS 13 GND 12 CLK3 11 CLK2 10 VDD 9 X2 16 pin 173 mil TSSOP EPROM CLOCK SYNTHESIZER Pin Descriptions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 15 16 Pin Name GND S0 S1 VDD VDDO CLK1 GND X1 X2 VDD CLK2 CLK3 GND PDTS VDD S2 Pin Type Power Input Power Output Power Ordering Information Part / Order Number 281PG* 281PGI* 281PGLF 281PGILF 281G-XX* 281GI-XX* 281G-XXLF 281GI-XXLF 281G-XXT* 281GI-XXT* 281G-XXLFT 281GI-XXLFT Marking See page 7 Shipping Packaging Tubes Tape and Reel Tape and Reel Tape and Reel Tape and Reel Package 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-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 281G-XX, 281G-XXLF, 281GI-XX, and 281GI-XXLF are factory programmed versions of the 281PG, 281PGLF, 281PGI, and 281PGILF. 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 ICS281 ICS281 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

PDF Datasheet Preview

DATASHEET

TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER ICS281

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.

Using IDT’s VersaClockTM 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.
• Packaged as 16-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
• Input clock frequency of 3 to 166 MHz
• Up to three reference outputs
• Operating voltages of V
• VDDO output control from V to 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

Crystal or clock input X1/ICLK

Crystal Oscillator

External capacitors are required with a crystal input.

VDD 3 PLL1 with Spread Spectrum

PLL2

PLL3

VDDO

Divide Logic and Output Enable Control

GND 3

PDTS

CLK1 CLK2 CLK3

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

ICS281

ICS281 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER

Pin Assignment

GND 1 S0 2 S1 3

VDD 4 VDDO 5 CLK1 6

GND 7 X1/ICLK 8
16 S2 15 VDD 14 PDTS 13 GND 12 CLK3 11 CLK2 10 VDD 9 X2
16 pin 173 mil TSSOP

EPROM CLOCK SYNTHESIZER

Pin Descriptions

Pin Number
1 2 3 4 5 6 7 8 9 10 11 12 13
15 16

Pin Name GND

S0 S1 VDD VDDO CLK1 GND X1 X2 VDD CLK2 CLK3 GND

PDTS

VDD S2

Pin Type Power Input Power Output Power
Ordering Information

Part / Order Number
281PG* 281PGI* 281PGLF 281PGILF 281G-XX* 281GI-XX* 281G-XXLF 281GI-XXLF 281G-XXT* 281GI-XXT* 281G-XXLFT 281GI-XXLFT

Marking

See page 7

Shipping Packaging

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

Package
16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-pin TSSOP 16-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 281G-XX, 281G-XXLF, 281GI-XX, and 281GI-XXLF are factory programmed versions of the 281PG, 281PGLF, 281PGI, and 281PGILF. 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

ICS281

ICS281 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

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 ICS281PG Datasheet file may be downloaded here without warranties.

Datasheet ID: ICS281PG 636972