ICS501-DWF ICST [Integrated Circuit Systems], ICS501-DWF Datasheet

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ICS501-DWF

Manufacturer Part Number
ICS501-DWF
Description
Manufacturer
ICST [Integrated Circuit Systems]
Datasheet
MDS 501B C
I n t e gra te d C i r c u i t S y s t e m s
Description
The ICS501B LOCO
generate a high-quality clock output from a lower
frequency crystal or clock input. The name LOCO
stands for Low Cost Oscillator, as it is designed to
replace crystal oscillators in most electronic systems.
Using Phase-Locked Loop (PLL) techniques, the
device uses a standard fundamental mode,
inexpensive crystal to produce output clocks up to 20
MHz.
Stored in the chip’s ROM is the ability to generate nine
different multiplication factors, allowing one chip to
output many common frequencies (see table on page
2).
The device also has an output enable pin which
tri-states the clock output when the OE pin is taken low.
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 or guaranteed.
For applications which require defined input to output
skew, use the ICS570B.
Block Diagram
Clock input
Crystal or
Optional crystal capacitors
TM
X1/ICLK
X2
is the most cost effective way to
S1:0
5 25 Race Stre et, San Jo se, CA 9 5126
2
Oscillator
Crystal
1
LOCO™ PLL C
Features
PLL Clock
and ROM
Multiplier
GND
VDD
Circuitry
Packaged as 8 pin SOIC or die
Available in Pb (lead) free package
ICS’ lowest cost PLL clock
Zero ppm multiplication error
Input crystal frequency of 5 MHz
Input clock frequency of 5 MHz
Output clock frequencies up to 15 MHz
Extremely low jitter of 25 ps (one sigma)
Compatible with popular CPUs
Duty cycle of 45/55 up to 20 MHz
Nine selectable frequencies
Operating voltage of 3.3 V or 5.5 V
Tri-state output for board level testing
25 mA drive capability at TTL levels
Ideal for oscillator replacement
Industrial temperature version available
Advanced, low-power CMOS process
te l (40 8) 2 97-12 01
OE
LOCK
ICS501B
M
CLK
ULTIPLIER
w w w. i c st . c o m
Revision 120704

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ICS501-DWF Summary of contents

Page 1

... Description TM The ICS501B LOCO is the most cost effective way to generate a high-quality clock output from a lower frequency crystal or clock input. The name LOCO stands for Low Cost Oscillator designed to replace crystal oscillators in most electronic systems. Using Phase-Locked Loop (PLL) techniques, the ...

Page 2

... Clock output per table above. Select 0 for output clock. Connect to GND or VDD or float. Input Output enable. Tri-states CLK output when low. Internal pull-up. Output Crystal connection. Leave unconnected for clock input. 2 ICS501B LOCO™ PLL Clock Multiplier CLK Minimum Input 4X input 0.5 MHz 5 ...

Page 3

... ICS501B must be isolated from system power supply noise to perform optimally. A decoupling capacitor of 0.01µF must be connected between VDD and the GND. It must be connected close to the ICS501B to minimize lead inductance. No external power supply filtering is required for the ICS501B. Series Termination Resistor A 33Ω terminating resistor can be used next to the CLK pin for trace lengths over one inch ...

Page 4

... Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS501B. These ratings, which are standard values for ICS 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 5

... V, Note 2.0 to 8.0 V, Note 1 MHz OD t Deviation from ja mean, Note 1 t Note 08) 297 -1 201 ● ICS501B PLL Clock Multiplier Typ. Max. Units 7.5 MHz 0.5 7.5 MHz 4 15 MHz 4 15 MHz 4 15 MHz 4 ...

Page 6

... ICS501BMLFT 501BML ICS501BMILF 501BMIL ICS501BMILFT 501BMIL ICS501-DWF - ICS501-DPK - “LF” denotes Pb (lead) free package. While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (ICS) 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 ...

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