ics525-03 Integrated Device Technology, ics525-03 Datasheet

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ics525-03

Manufacturer Part Number
ics525-03
Description
Pecl Input Oscar-tm User Configurable Clock
Manufacturer
Integrated Device Technology
Datasheet
PECL INPUT OSCAR™ USER CONFIGURABLE CLOCK
IDT™ / ICS™ PECL INPUT OSCAR™ USER CONFIGURABLE CLOCK
Description
The ICS525-03 are the most flexible way to generate a
high-quality, high-accuracy, high-frequency clock
output from a PECL input. The name OSCaR stands
for OSCillator Replacement, as they are designed to
replace crystal oscillators in almost any electronic
system. The user can configure the device to produce
nearly any output frequency from any input frequency
by grounding or floating the select pins. Neither
microcontroller, software, nor device programmer are
needed to set the frequency. Using Phase-Locked
Loop (PLL) techniques, the device accepts a PECL
clock to produce output clocks up to 250 MHz, keeping
them frequency locked together. Resistors are for
PECL outputs only.
For simple multipliers to produce common frequencies,
refer to the LOCO
and more cost effective.
This product is intended for clock generation. It has low
output jitter (variation in the output period), but input to
output skew and jitter are not defined nor guaranteed.
Block Diagram
PECLIN
PECLIN
TM
family of parts, which are smaller
Reference
R6:R0
Divider
7
2
GND
Phase Comparator,
Charge Pump, and
Loop Filter
Divider
V8:V0
9
VCO
2
VDD
1
Features
NOTE: EOL for non-green parts to occur on
5/13/10 per PDN U-09-01
Packaged as 28-pin SSOP (150 mil body)
Highly accurate frequency generation
User determines the output frequency by setting all
internal dividers
Eliminates need for custom oscillators
No software needed
Pull-ups on all select inputs
PECL input clock frequency of 0.5 to 250 MHz
Output clock frequencies up to 250 MHz
Very low jitter
Operating voltage of 3.0 V or 5.5 V
25 mA drive capability at TTL levels
Ideal for oscillator replacement
Industrial temperature
Available in Pb (lead) free package
Advanced, low-power CMOS process
VCO
Divider
S2:S0
Output
3
RES
ICS525-03
DATASHEET
ICS525-03
VDD
270 Ohm
VDD
270 Ohm
62 Ohm
62 Ohm
REV J 092209
CLK1
CLK2

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ics525-03 Summary of contents

Page 1

... PECL INPUT OSCAR™ USER CONFIGURABLE CLOCK Description The ICS525-03 are the most flexible way to generate a high-quality, high-accuracy, high-frequency clock output from a PECL input. The name OSCaR stands for OSCillator Replacement, as they are designed to replace crystal oscillators in almost any electronic system. The user can configure the device to produce nearly any output frequency from any input frequency by grounding or floating the select pins ...

Page 2

... PECL MULTIPLIER RES CLK1 CLK2 Pre-divide (P) 0 CMOS CMOS PECL PECL to VDD VDD = 3.3 V RES = 0 RES = 1 120 200 125 80 40 ICS525- REV J 092209 ...

Page 3

... Connect to ground. VCO divider word input pins determined by user. Forms a binary number from 0 to 511. Select eithe PECL or CMOS outputs. See table above. Output clock. Either PECL or CMOS determined by RES. Output clock. Either PECL or CMOS determined by RES. 3 PECL MULTIPLIER ICS525-03 REV J 092209 ...

Page 4

... I/O ports to switch frequencies. By choosing divides carefully, the number of inputs which need to be changed can be minimized. Observe the restrictions on allowed values of VDW and RDW. The output of the ICS525-03 can be determined by the following simple equation: Frequency = Input Frequency CLK ...

Page 5

... PECL INPUT OSCAR™ USER CONFIGURABLE CLOCK Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS525-03. These ratings, which are standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied ...

Page 6

... Symbol Conditions F Clock input OUT OUT 0.8 to 2.0 V 2 VDD/2 at VDD/2 t Deviation from mean ja t One Sigma js 6 PECL MULTIPLIER Min. Typ. Max. Units 0.5 250 MHz 1 250 MHz 1 200 MHz ±350 ps 125 ps ICS525-03 REV J 092209 ...

Page 7

... Basic 0.025 Basic L 0.40 1.27 .016 aaa -- 0. Package Temperature 28-pin SSOP -40 to +85 C 28-pin SSOP -40 to +85 C 28-pin SSOP -40 to +85 C 28-pin SSOP -40 to +85 C ICS525-03 Inches Max .069 .010 .059 .012 .010 .394 .244 .157 .050 8 0.004 c REV J 092209 ...

Page 8

... ICS525-03 PECL INPUT OSCAR™ USER CONFIGURABLE CLOCK 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 reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device Technology, Inc ...

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