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ICS501A Datasheet

PLL CLOCK MULTIPLIER

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LOCO™ PLL CLOCK MULTIPLIER
DATASHEET
ICS501A
Description
The ICS501A LOCOTM is the most cost effective way to
generate a high quality, high frequency 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 200
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
Features
Packaged as 8-pin SOIC (Pb-free) or die
IDT’s lowest cost PLL clock
Zero ppm multiplication error
Input crystal frequency of up to 27 MHz
Input clock frequency of up to 50 MHz
Output clock frequencies up to 200 MHz
Extremely low jitter of 25 ps (one sigma)
Compatible with all popular CPUs
Duty cycle of 45/55 up to 200 MHz
Nine selectable frequencies
Operating voltage of 3.3 V
Tri-state output for board level testing
25 mA drive capability at TTL levels
Ideal for oscillator replacement
Optimized for output frequencies of up to 200 MHz
(166 MHz maximum for industrial temperature
version)
Industrial temperature version available
Advanced, low power CMOS process
VDD
S1:0 2
Crystal or
Clock input
X1/ICLK
X2
Crystal
O s c illa to r
Optional crystal capacitors
PLL Clock
M u ltip lie r
Circuitry
and ROM
GND
OE
CLK
IDT® LOCO™ PLL CLOCK MULTIPLIER
1
ICS501A
REV H 113011


Integrated Device Technology Electronic Components Datasheet

ICS501A Datasheet

PLL CLOCK MULTIPLIER

No Preview Available !

ICS501A
LOCO™ PLL CLOCK MULTIPLIER
CLOCK MULTIPLIER
Pin Assignment
X1/ I CLK
VDD
GND
S1
1
2
3
4
8 X2
7 OE
6 S0
5 CLK
8 Pi n ( 150 mi l ) SOI C
Clock Output Table
S1 S0
00
0M
01
M0
MM
M1
10
1M
11
CLK
4X input
5.333X input
5X input
10X input
2X input
12X input
6X input
3X input
8X input
Minimum Input (MHz)
15
12
12
6
30
5
10
20
10
0 = connect directly to ground
1 = connect directly to VDD
M = leave unconnected (floating)
Pin Descriptions
Pin Pin
Number Name
1 XI/ICLK
2 VDD
3 GND
4 S1
5 CLK
6 S0
7 OE
8 X2
Pin
Type
Input
Power
Power
Tri-level Input
Output
Tri-level Input
Input
Output
Pin Description
Crystal connection or clock input.
Connect to +3.3 V.
Connect to ground.
Select 1 for output clock. Connect to GND or VDD or float.
Clock output per table above.
Select 0 for output clock. Connect to GND or VDD or float.
Output enable. Tri-states CLK output when low. Internal pull-up
resistor.
Crystal connection. Leave unconnected for clock input.
IDT® LOCO™ PLL CLOCK MULTIPLIER
2
ICS501A
REV H 113011


Part Number ICS501A
Description PLL CLOCK MULTIPLIER
Maker IDT
Total Page 6 Pages
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