ICS840014AGIT - Integrated Circuit Systems, Inc.

Integrated

Circuit

Systems, Inc.

840014AGI www.icst.com/products/hiperclocks.html REV. A DECEMBER 23, 2004

ICS840014I

FEMTOCLOCKS™ C RYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

PRELIMINARY

GENERAL DESCRIPTION

The ICS840014I is a 4 output LVCMOS/LVTTL

Synthesizer optimized to generate Fibre Channel

reference clock frequencies and is a member of

the HiPerClocksTM family of high performance

clock solutions from ICS. This device uses a

26.5625MHz, 18pF parallel resonant crystal to synthesize

106.25MHz. Using FemtoClock’sTM ultra-low phase noise VCO

technology, the ICS840014I can achieve 1ps or lower typical

random rms phase jitter, easily meeting Fibre Channel jitter

requirements. The ICS840014I is packaged in a small 20-pin

TSSOP package.

HiPerClockS™

ICS

BLOCK DIAGRAM

FEATURES

• Four LVCMOS/LVTTL outputs, 15Ω typical output impedance

• Selectable crystal oscillator interface

or LVCMOS single-ended input

• Output frequency: 106.25MHz or 53.125MHz

• RMS phase jitter @ 106.25MHz (637KHz - 5MHz):

0.72ps (typical)

• Output supply modes:

Core/Output

3.3V/3.3V

3.3V/2.5V

2.5V/2.5V

• -40°C to 85°C ambient operating temperature

F_SEL

nPLL_SEL

nXTAL_SEL

XTAL_IN

XTAL_OUT

TEST_CLK

OSC

Phase

Detector VCO

M = ÷24 (fixed)

F_SEL

0 ÷6

1 ÷12

26.5625MHz

Pulldown

Pullup

Pulldown

PIN ASSIGNMENT

ICS840014I

20-Lead TSSOP

6.5mm x 4.4mm x 0.92mm

package body

G Package

Top View

F_SEL

nXTAL_SEL

TEST_CLK

nPLL_SEL

VDDA

VDD

GND

VDDO

GND

XTAL_IN

XTAL_OUT

Pullup

FREQUENCY SELECT FUNCTION TABLE

stupnI tuptuO

ycneuqerF

egnaR

tupnI

ycneuqerF 1LES_F rediviDM

eulaV

rediviDN

eulaV

N/M

eulaVoitaR

5265.620426 4 52.601

526

5.62142212 521.35

The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial

product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.

Integrated

Circuit

Systems, Inc.

840014AGI www.icst.com/products/hiperclocks.html REV. A DECEMBER 23, 2004

ICS840014I

FEMTOCLOCKS™ C RYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

PRELIMINARY

TABLE 1. PIN DESCRIPTIONS

TABLE 2. PIN CHARACTERISTICS

rebmuNemaNepyTnoitpircseD

1LES_FtupnIpulluP.slevelecafretniLTTVL/SOMCVL.niptcelesycneuqerF

02,9,2cndesunU.tcennoc

3LES_LATXntupnInwodlluP

ecnereferLLPehtsastupniKLC_TSETrolatsyrcehtneewtebstceleS

LATXstceles,WOLnehW.KL

C_TSETstceles,HGIHnehW.ecruos

.slevelecafretniLTTVL/SOMCVL.supni

4KLC_TSETtupnInwodlluP.tupnikcolcLTTVL/SOM

CVLdedne-elgniS

5EOtupnIpulluP eht,WOLnehW.evitcaerastuptuoeht,HGIHnehW.nipelbanetuptuO

.slevelecafretniLTT

VL/SOMCVL.etatsecnadepmihgihanierastuptuo

6RMtupnInwodlluP

erasredividlanretnieht,HGIHcigolnehW.teseRretsa

MHGIHevitcA

lanretnieht,WOLcigolnehW.wologotstuputoehtgnisuacteser

.slevelecafretniLTTVL/SOMCVL.delbane

erastuptuoehtdnasredivid

7LES_LLPntupnInwodlluP

.tuptuoOCVehtmorfnevirdsituptuoeht,WOLnehW.ssapyBLLP

ecnere

fer=ycneuqerftuptuoehtdnadessapybsiLLPeht,HGIHnehW

.redividtuptuoN/ycneuqerfkcolc

.slevelecafretniLTTVL

/SOMCVL

ADD

rewoP.nipylppusgolanA

01V

rewoP.nipylppuseroC

,11

,TUO_LATX

NI_LATX tupnI .tuptuoehtsiTUO_LATX.ecafretnirotallicsolatsyrC

.tupniehts

iNI_LATX

91,31DNGrewoP.dnuorgylppusrewoP

51,41

81,71

,2Q,3Q

0Q,1Q tuptuO .slevelecafretniLTTVL/SOMCVL.stuptuokc

olcdedne-elgniS

51 Ω.ecnedepmituptuolacipyt

61V

ODD

rewoP.nipylppustuptuO

:ETON

pulluP

dna

nwodlluP

.seulavlacipytrof,scitsiretcarahCniP,2elbaTeeS.srotsisertupnilanretniotrefer

lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU

ecnaticapaCtupnI 4Fp

ecnaticapaCnoitapissiDrewoP

ADD

ODD

V564.3=DBTFp

ADD

V,V564.3=

ODD

V526.2=DBTFp

ADD

ODD

V526.2=DBTFp

PULLUP

rotsiseRpulluPtupnI 15KΩ

NWODLLUP

rotsiseRnwodlluPtupnI 15KΩ

TUO

ecnadepmItuptuO 51 Ω

Integrated

Circuit

Systems, Inc.

840014AGI www.icst.com/products/hiperclocks.html REV. A DECEMBER 23, 2004

ICS840014I

FEMTOCLOCKS™ C RYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

PRELIMINARY

TABLE 3A. POWER SUPPLY DC CHARACTERISTICS, VDDD = VDDA = VDDO = 3.3V±5%, TA = -40°C TO 85°C

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, V

DD 4.6V

Inputs, VI-0.5V to VDD + 0.5 V

Outputs, VO-0.5V to VDD + 0.5V

Package Thermal Impedance, θJA 73.2°C/W (0 lfpm)

Storage Temperature, T

STG -65°C to 150°C

NOTE: Stresses beyond those listed under Absolute

Maximum Ratings may cause permanent damage to the

device. These ratings are stress specifications only. Functional

operation of product at these conditions or any conditions be-

yond those listed in the

DC Characteristics

AC Character-

istics

is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect product reliability.

lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU

egatloVylppuSeroC 531.33.3564.3V

ADD

egatloVylppuSgolanA 531.33.3564.3V

ODD

egatloVylppuStuptuO 531.33.3564.3V

tnerruCylppuSrewoP 57Am

ADD

tnerruCylppuSgolanA 6Am

ODD

tnerruCylppuStuptuO 5Am

TABLE 3B. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDA = 3.3V±5%, VDDO = 2.5V±5%, TA = -40°C TO 85°C

lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU

egatloVylppuSeroC 531.33.3564.3V

ADD

egatloVylppuSgolanA 531.33.3564.3V

ODD

egatloVylppuStuptuO 573.25.2526.2V

tnerruCylppuSrewoP 57Am

ADD

tnerruCylppuSgolanA 6Am

ODD

tnerruCylppuStuptuO 4Am

TABLE 3C. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDA = VDDO = 2.5V±5%, TA = -40°C TO 85°C

lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU

egatloVylppuSeroC 573.25.2526.2V

ADD

egatloVylppuSgolanA 573.25.2526.2V

ODD

egatloVylppuStuptuO 573.25.2526.2V

tnerruCylppuSrewoP 07Am

ADD

tnerruCylppuSgolanA 6Am

ODD

tnerruCylppuStuptuO 4Am

Integrated

Circuit

Systems, Inc.

840014AGI www.icst.com/products/hiperclocks.html REV. A DECEMBER 23, 2004

ICS840014I

FEMTOCLOCKS™ C RYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

PRELIMINARY

TABLE 4. CRYSTAL CHARACTERISTICS

retemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU

noitallicsOfoedoM latnemadnuF

ycneuqerF 5265.62zHM

)RSE(ecnats

iseRseireStnelaviuqE 05 Ω

ecnaticapaCtnuhS 7Fp

.latsyrctnanoserlellarapfp81nagnisudeziretcarahC:ETON

TABLE 3D. LVCMOS/LVTTL DC CHARACTERISTICS, VDD = VDDA = 3.3V±5%, VDDO = 3.3V±5% OR 2.5V±5%, TA = -40°C TO 85°C

lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU

tupnI

egatloVhgiH

,LES_LATXn,LES_LLPn

RM,EO,LES_F 2V

3.0+V

KLC_TSET2V

3.0+V

tupnI

egatloVwoL

,LES_LATXn,LES_LLPn

RM,EO,LES_F 3.0-8.0V

KLC_TSET3.0-3.1V

tupnI

tnerruChgiH

EO,LES_F V

roV564.3=

V526.2 5Aµ

,RM,LES_LLPn

KLC_TSET,LES_LATXn

roV564.3=

V526.2 051Aµ

tupnI

tnerruCwoL

EO,LES_F V

,V526.2roV564.3=

V0= 051-Aµ

,RM,LES_LLPn

KLC_TSET,LES_LATXn

,V526.2roV564.3=

V0= 5-Aµ

1ETON;egatloVhgiHtuptuO V

ODD

%5±V3.3=6.2V

ODD

%5±V5.2=8.1V

1ETON;egatloVwoLtuptuOV

ODD

%5±V5.2roV3.3=5.0V

05htiwdetanimretstuptuO:1ETON ΩVot

ODD

.tiucriCtseTdaoLtuptuO,noitamrofnItnemerusaeMretemaraPeeS.2/

Integrated

Circuit

Systems, Inc.

840014AGI www.icst.com/products/hiperclocks.html REV. A DECEMBER 23, 2004

ICS840014I

FEMTOCLOCKS™ C RYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

PRELIMINARY

TABLE 5A. AC CHARACTERISTICS, VDD = VDDA = VDDO = 3.3V±5%, TA = -40°C TO 85°C

TABLE 5B. AC CHARACTERISTICS, VDD = VDDA = 3.3V±5%, VDDO = 2.5V±5%, TA = -40°C TO 85°C

lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU

TUO

ycneuqerFtuptuO 52.601zHM

521.35zHM

)o(ks3,1ETON;wekStuptuO DBTsp

)Ø(tij ;)modnaR(rettiJesahPSMR

2ETON

)zHM5-zHK736(zHM52.60127.0sp

)zHM5-zHK736(zHM521.3536.0sp

emiTkcoLLLP 1sm

emiTllaF/esiRtuptuO%08ot%02005sp

cdoelcyCytuDtuptuO 05%

.snoitidnocdaollauqehtiwdnasegatlovylppusemasehttastu

ptuoneewtebwekssadenifeD:1ETON

VtaderusaeM

ODD

.2/

.tolPesioNesahPehtotreferesaelP:2ETON

.56dradnatSCEDEJhtiwecnadroccanidenifedsiretemarapsihT:3ETON

lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU

TUO

ycneuqerFtuptuO 52.601zHM

521.35zHM

)o(ks3,1ETON;wekStuptuO DBTsp

)Ø(tij ;)modnaR(rettiJesahPSMR

2ETON

)zHM5-zHK736(zHM52.60157.0sp

)zHM5-zHK736(zHM521.3536.0sp

emiTkcoLLLP 1sm

emiTllaF/esiRtuptuO%08ot%02055sp

cdoelcyCytuDtuptuO 05%

.snoitidnocdaollauqehtiwdnasegatlovylppusemasehttastu

ptuoneewtebwekssadenifeD:1ETON

VtaderusaeM

ODD

.2/

.tolPesioNesahPehtotreferesaelP:2ETON

.56dradnatSCEDEJhtiwecnadroccanidenifedsiretemarapsihT:3ETON

TABLE 5C. AC CHARACTERISTICS, VDD = VDDA = VDDO = 2.5V±5%, TA = -40°C TO 85°C

lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU

TUO

ycneuqerFtuptuO 52.601zHM

521.35zHM

)o(ks3,1ETON;wekStuptuO DBTsp

)Ø(tij ;)modnaR(rettiJesahPSMR

2ETON

)zHM5-zHK736(zHM52.60127.0sp

)zHM5-zHK736(zHM521.3576.0sp

emiTkcoLLLP 1sm

emiTllaF/esiRtuptuO%08ot%02005sp

cdoelcyCytuDtuptuO 05%

.snoitidnocdaollauqehtiwdnasegatlovylppusemasehttastu

ptuoneewtebwekssadenifeD:1ETON

VtaderusaeM

ODD

.2/

.tolPesioNesahPehtotreferesaelP:2ETON

.56dradnatSCEDEJhtiwecnadroccanidenifedsiretemarapsihT:3ETON

Integrated

Circuit

Systems, Inc.

840014AGI www.icst.com/products/hiperclocks.html REV. A DECEMBER 23, 2004

ICS840014I

FEMTOCLOCKS™ C RYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

PRELIMINARY

TYPICAL PHASE NOISE AT 53.125MHZ (3.3V)

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

-110

-120

-130

-140

-150

-160

-170

-180

-190

100 1k 10k 100k 1M 10M 100M

53.125MHz

RMS Phase Jitter (Random)

637KHz to 5MHz = 0.63ps (typical)

OFFSET FREQUENCY (HZ)

NOISE POWER dBc

Phase Noise Result by adding

Fibre Channel Filter to raw data

Raw Phase Noise Data

Fibre ChannelFilter Filter

➤

TYPICAL PHASE NOISE AT 106.25MHZ (3.3V)

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

-110

-120

-130

-140

-150

-160

-170

-180

-190

100 1k 10k 100k 1M 10M 100M

106.25MHz

RMS Phase Jitter (Random)

637KHz to 5MHz = 0.75ps (typical)

OFFSET FREQUENCY (HZ)

NOISE POWER dBc

Phase Noise Result by adding

Fibre Channel Filter to raw data

Raw Phase Noise Data

Fibre ChannelFilter

➤

Integrated

Circuit

Systems, Inc.

840014AGI www.icst.com/products/hiperclocks.html REV. A DECEMBER 23, 2004

ICS840014I

FEMTOCLOCKS™ C RYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

PRELIMINARY

PARAMETER MEASUREMENT INFORMATION

Pulse Width

tPERIOD

tPW

tPERIOD

odc =

DDO

Q0:Q3

RMS PHASE JITTER

OUTPUT SKEW

3.3V CORE/3.3V OUTPUT LOAD AC TEST CIRCUIT

SCOPE

LVCMOS

1.65V±5%

-1.65V±5%

OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD

Clock

Outputs

20%

80% 80%

20%

tRtF

VDD,

VDDA, VDDO

GND

Phase Noise Mas

Offset Frequency

f1f2

Phase Noise Plot

RMS Jitter = Area Under the Masked Phase Noise Plot

Noise Power

sk(o)

DDO

OUTPUT RISE/FALL TIME

SCOPE

LVCMOS

2.05V±5%

-1.25V±5%

VDD,

VDDA

GND

1.25V±5%

VDDO

3.3V CORE/2.5V OUTPUT LOAD AC TEST CIRCUIT

2.5V CORE/2.5V OUTPUT LOAD AC TEST CIRCUIT

SCOPE

LVCMOS

1.25V±5%

-1.25V±5%

VDD,

VDDA, VDDO

GND

Integrated

Circuit

Systems, Inc.

840014AGI www.icst.com/products/hiperclocks.html REV. A DECEMBER 23, 2004

ICS840014I

FEMTOCLOCKS™ C RYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

PRELIMINARY

APPLICATION INFORMATION

As in any high speed analog circuitry, the power supply pins

are vulnerable to random noise. The ICS840014I provides

separate power supplies to isolate any high switching

noise from the outputs to the internal PLL. VDD, VDDA, and VDDO

should be individually connected to the power supply

plane through vias, and bypass capacitors should be

used for each pin. To achieve optimum jitter performance,

power supply isolation is required.

Figure 1

illustrates how

a 10Ω resistor along with a 10µF and a .01µF bypass

capacitor should be connected to each VDDA.

POWER SUPPLY FILTERING TECHNIQUES

FIGURE 1. POWER SUPPLY FILTERING

10Ω

VDDA

10µF

.01µF

3.3V

.01µF

VDD

CRYSTAL INPUT INTERFACE

The ICS840014I has been characterized with 18pF parallel reso-

nant crystals. The capacitor values shown in

Figure 2

below were

Figure 2. CRYSTAL INPUt INTERFACE

determined using a 26.5625MHz 18pF parallel resonant crystal and

were chosen to minimize the ppm error.

ICS84332

XTA L_I N

XTA L_ OU T

18pF Parallel Cry stal

22p

ICS840014I

Integrated

Circuit

Systems, Inc.

840014AGI www.icst.com/products/hiperclocks.html REV. A DECEMBER 23, 2004

ICS840014I

FEMTOCLOCKS™ C RYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

PRELIMINARY

RELIABILITY INFORMATION

TRANSISTOR COUNT

The transistor count for ICS840014I is: 3085

TABLE 6. θJAVS. AIR FLOW TABLE FOR 20 LEAD TSSOP

θθ

θJA by Velocity (Linear Feet per Minute)

0 200 500

Single-Layer PCB, JEDEC Standard Test Boards 114.5°C/W 98.0°C/W 88.0°C/W

Multi-Layer PCB, JEDEC Standard Test Boards 73.2°C/W 66.6°C/W 63.5°C/W

NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.

LAYOUT GUIDELINE

Figure 3

shows a schematic example of the ICS840014I. An

example of LVCMOS termination is shown in this schematic.

Additional LVCMOS termination approaches are shown in

the LVCMOS Termination Application Note. In this example,

an 18pF parallel resonant 26.5625MHz crystal is used. The

FIGURE 3. ICS840014I SCHEMATIC EXAMPLE

C1=22pF and C2=22pF are recommended for frequency ac-

curacy. For different board layout, the C1 and C2 may be

slightly adjusted for optimizing frequency accuracy. 1KΩ

pullup or pulldown resistors can be used for the logic control

input pins.

22pF

Logic Control Input Examples

RU2

Not Install

3.3V

Set Logic

Input to

'1'

3.3V

0.01u

To Logic

Input

pins

0.1u

ICS840014

10 11

F_SEL

nXTAL_SEL

TEST_C LK

nPLL_SEL

VDDA

VDD XTAL_OUT

XTAL_IN

GND

VDDO

GND

Q1 R4

22pF

Zo = 50 Ohm

LVCMOS

3.3V

0.1u

VDDA

XTA L _O U T

3.3V

RD1

Not Install

10uF

RU1

RD2

Zo = 50 Ohm

To Logic

Input

pins

LVCMOS

3.3V

XTA L _I N

Set Logic

Input to

'0'

ICS80014I

Integrated

Circuit

Systems, Inc.

840014AGI www.icst.com/products/hiperclocks.html REV. A DECEMBER 23, 2004

ICS840014I

FEMTOCLOCKS™ C RYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

PRELIMINARY

PACKAGE OUTLINE - G SUFFIX FOR 20 LEAD TSSOP

TABLE 7. PACKAGE DIMENSIONS

LOBMYS sretemilliM

NIMXAM

N02

A--02.1

1A50.051.0

2A08.050.1

b91.003.0

c90.002.0

D04.606.6

ECISAB04.6

1E03.405.4

eCISAB56.0

L54.057.0

α°

0°8

aaa--01.0

Reference Document: JEDEC Publication 95, MO-153

Integrated

Circuit

Systems, Inc.

840014AGI www.icst.com/products/hiperclocks.html REV. A DECEMBER 23, 2004

ICS840014I

FEMTOCLOCKS™ C RYSTAL-TO-

LVCMOS/LVTTL FREQUENCY SYNTHESIZER

PRELIMINARY

TABLE 8. ORDERING INFORMATION

While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) assumes no responsibility for either its use

or for 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 and industrial applications. Any other applications such as those requiring high reliability or other extraordinary environmental requirements are not

recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product

for use in life support devices or critical medical instruments.

The aforementioned trademarks, HiPerClockS™ and FEMTOCLOCKS™ are a trademark of Integrated Circuit Systems, Inc. or its subsidiaries in the United States and/or other countries.

rebmuNredrO/traPgnikraMegakcaPtnuoCerutarepmeT

IGA410048SCIDBTPOSSTdaeL02ebutrep27C°58otC°04-

TIGA410048SCIDBTlee

RdnaepaTnoPOSSTdaeL020052C°58otC°04-