DATASHEETICS512

LOCO™ PLL CLOCK MULTIPLIER
DescriptionFeatures

The ICS512 is the most cost effective way to generatea high-quality, high frequency clock output and areference clock 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 mostelectronic systems. Using Phase-Locked-Loop (PLL)
techniques, the device uses a standard fundamental
mode, inexpensive crystal to produce output clocks up
to 200 MHz. With a reference output, this chip plus aninexpensive crystal can replace two oscillators• Packaged as 8-pin SOIC or die• Pb (lead ) free package• Upgrade of popular ICS502 with:— changed multiplier table— higher operating frequncies• Zero ppm multiplication error• Easy to cascade with other 5xx series• Input crystal frequency of 5 - 27 MHz• Input clock frequency of 2 - 50 MHz• Output clock frequencies up to 200 MHz• Compatible with all popular CPUs
• Duty cycle of 45/55 up to 200 MHz• Mask option for nine selectable frequencies• Operating voltages of 3.0 to 5.5 V• Industrial temperature version available• Advanced, low power CMOS process

Stored in the chip’s ROM is the ability to generate ninedifferent multiplication factors, allowing one chip tooutput many common frequencies (see table on page2).
This product is intended for clock generation. It has low
output jitter (variation in the output period), but input tooutput skew and jitter are not defined or guaranteed.
For applications which require defined input to output
skew, use the ICS570B.

Block Diagram
VDD

S1, S0X1/ICLK
Crystal or
Clock input
X2
Optional crystal
capacitors

IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER

2PLL ClockSynthesis
and ControlCircuitry

CrystalOscillator

CLKREF

GND

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LOCO™ PLL CLOCK MULTIPLIER

CLOCK MULTIPLIER

Pin Assignment

Clock Output Table

X1/ I CLK

18X2VDD

27S1GND

36S0REF

45CLK

8 - p i n ( 1 5 0 mi l ) S OI C

S1S0

CLK

000MMM
1110M
10M
10M
14X input
5.333X input
5X input2.5X input
2X input
3.333X input
6X input
3X input
8X input

0 = connect directly to ground
1 = connect directly to VDD
M = leave unconnected (floating)Common Output Frequencies Example (MHz)Output

20

2430

32

33.33

37.5

40

48

50

60

64

Input

10

12

10

16

16.66

15101220

1016

Selection (S1, S0)

M,M

M,M

1, M

M,M

M,M

M,0

0,00,0M,01,00,0

Output

66.66

72

75

80

83.33

90

100

120

125

133.3

150Input

20

1225

1025

1520

15252525

Selection (S1, S0)

M,11,01,M

1,1M,11,00,11,10,10,M

1,0Note that all of the above are achieved using a common, inexpensive 10 MHz to 25 MHz crystal. Consult
IDT on how to achieve other output frequncies.

IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER

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LOCO™ PLL CLOCK MULTIPLIER

CLOCK MULTIPLIER

Pin Descriptions
Pin
Number

PinNamePin Type

1XI/ICLK

Input

Crystal connection or clock input.

2VDD

PowerConnect to +3.3 V or +5 V.

3GND

PowerConnect to ground.

4NC

REF

Buffered crystal oscillator output clock.

5CLKOutput

Clock output per table above.

6S0

Tri-level Input

Mulitplier select pin 0. Connect to GND or VDD or float.

7

S1

Tri-level Input

Mulitplier select pin 1. Connect to GND or VDD or float.

8X2Output

Crystal connection. Leave unconnected for clock input.

IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER

Pin Description

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LOCO™ PLL CLOCK MULTIPLIER

CLOCK MULTIPLIER

External Components

Crystal Load Capacitors
The device crystal connections should include pads forsmall capacitors from X1 to ground and from X2 toground. These capacitors are used to adjust the stray
capacitance of the board to match the nominallyrequired crystal load capacitance. Because load
capacitance can only be increased in this trimming
process, it is important to keep stray capacitance to aminimum by using very short PCB traces (and no vias)
between the crystal and device. Crystal capacitors, if
needed, must be connected from each of the pins X1and X2 to ground.

Decoupling Capacitor
As with any high-performance mixed-signal IC, theICS512 must be isolated from system power supply
noise to perform optimally.
A decoupling capacitor of 0.01µF must be connected
between VDD and GND. It must be connected close tothe ICS512 to minimize lead inductance. No external
power supply filtering is required for the ICS512.

Series Termination Resistor
The value (in pF) of these crystal caps should equal (CL-12 pF)*2. In this equation, CL= crystal load capacitancein pF. Example: For a crystal with a 16 pF loadcapacitance, each crystal capacitor would be 8 pF[(16-12) x 2] = 8.

A 33Ω terminating resistor can be used next to the CLK
pin. The total on-chip capacitance is approximately 12
pF. A parallel resonant, fundamental mode crystal
should be used.

Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS512. These ratings, which
are standard values for IDT commercially rated parts, are stress ratings only. Functional operation of thedevice at these or any other conditions above those indicated in the operational sections of thespecifications is not implied. Exposure to absolute maximum rating conditions for extended periods canaffect product reliability. Electrical parameters are guaranteed only over the recommended operating
temperature range.

Item

RatingSupply Voltage, VDD

7VAll Inputs and Outputs-0.5 V to VDD+0.5 V

Ambient Operating Temperature (commercial)

0 to +70° C

Ambient Operating Temperature (industrial)-40 to +85° C

Storage Temperature-65 to +150° C

Soldering Temperature

260° C

Recommended Operation Conditions
Parameter

Min.

Typ.

Max.

Units

Ambient Operating Temperature (commercial)

0+70°C

Ambient Operating Temperature (industrial)-40+85°C

Power Supply Voltage (measured in respect to GND)

+3.0+5.0VICS512

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IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER

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LOCO™ PLL CLOCK MULTIPLIER

CLOCK MULTIPLIERDC Electrical Characteristics
VDD=3.3 V ±5% , Ambient temperature 0 to +70° C, unless stated otherwise

Parameter

SymbolConditions

Min.

Typ.

3Max.

Units

5.5V

Operating Voltage

VDD

Input High Voltage, ICLK only

VIH

ICLK (pin 1)(VDD/2)+1 VDD/2

Input Low Voltage, ICLK only

VIL

ICLK (pin 1)

VDD/2

Input High Voltage

VIHS0, S1

Input Low Voltage

VILS0, S1

Output High Voltage, CMOS high

VOH

IOH = -8 mA

VDD-0.4

VOutput High Voltage

VOH

IOH = -12 mA

2.4

VOutput Low Voltage

VOL

IOL = 12 mA

V(VDD/2)-1

VDD-0.5

VV

0.5

V

0.4

V

IDD Operating Supply Current,
20 MHz crystal

No load, 100 MHz

9mA

Short Circuit Current

CLK output+70mA

Input Capacitance, S1, S0Pins 6, 74

pF

AC Electrical Characteristics
VDD=3.3 V ±5%, Ambient Temperature 0 to +70° C, unless stated otherwise

Parameter

SymbolConditions

Min.

Typ.

Max.

Units

Input Frequency, crystal input

FIN527MHz

Input Frequency, clock input

FIN

250MHzOutput Frequency, VDD = 4.5 to 5.5 V

FOUT

0 to +70°C

14200

MHz

-40 to +85°C

14160

MHz

0 to +70°C

14160

MHz

-40 to +85°C

14145

MHz

Output Frequency, VDD = 3.0 to 3.6 V

FOUT

Output Clock Rise TimetOR

0.8 to 2.0 V

1ns

Output Clock Fall TimetOF

2.0 to 8.0V

1ns

Output Clock Duty CycletOD

at VDD/2Absolute Clock Period Jittertja

Deviation frommean

One Sigma Clock Period Jittertjs

4549-5155%+200ps80ps

Note: The phase relationship between intput and output clocks can change at power up. For a fixed phaserelationship, see the ICS570 or the ICS527.

IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER

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LOCO™ PLL CLOCK MULTIPLIER

CLOCK MULTIPLIER

Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Narrow Body)
Package dimensions are kept current with JEDEC Publication No. 95
Millimeters

8SymbolEMinA
A1BCDEeHhL
αH

INDEX
AREA

1 2DInches*Max

Min

1.35
1.75
0.10
0.25
0.33
0.51
0.19
0.25
4.80
5.00
3.80
4.00
1.27 BASIC
5.80
6.20
0.25
0.50
0.40
1.27
0°
8°

Max

.0532
.0688
.0040
.0098
.013
.020
.0075
.0098
.1890
.1968
.1497
.1574
0.050 BASIC
.2284
.2440
.010
.020
.016
.050
0°
8°

*For reference only. Controlling dimensions in mm.
Ah x 45

A1C-CeSEATING
PLANE

BL.10 (.004)

C

Ordering Information
Part / Order Number

Marking

Shipping packaging

Package

Temperature

512MLF
512MLFT512MILF
512MILFT

512MLF
512MLF
512MILF
512MILF

Tubes
Tape and Reel
Tubes
Tape and Reel

8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC

0 to +70° C
0 to +70° C-40 to +85° C-40 to +85° C

Parts that are ordered with a "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant.
While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (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.

IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER

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LOCO™ PLL CLOCK MULTIPLIER

CLOCK MULTIPLIER

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