ICS873990 datasheet(8/16 Pages) ICST

Part #	ICS873990

Description	LOW VOLTAGE, LVCMOS/ CRYSTAL-TO-LVPECL/ECL CLOCK GENERATOR

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Manufacturer	ICST [Integrated Circuit Systems]

Direct Link	http://www.icst.com

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8 / 16 page

873990AY

www.icst.com/products/hiperclocks.html

REV. B

JUNE 13, 2005

8

Integrated

Circuit

Systems, Inc.

ICS873990

LOW VOLTAGE, LVCMOS/

CRYSTAL-TO-LVPECL/ECL CLOCK GENERATOR

PARAMETER MEASUREMENT INFORMATION

OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD

OUTPUT SKEW

OUTPUT RISE/FALL TIME

OUTPUT LOAD AC TEST CIRCUIT

SCOPE

Qx

nQx

LVPECL

2V

V

EE

tsk(o)

nQx

Qx

nQy

Qy

Clock

Outputs

20%

80%

20%

tR

t F

VSWING

-1.3V ± -0.165V

V

CC,

V

CCA

, V

CCO

MULTIPLE FREQUENCY SKEW

➤

tjit(cc) = tcycle n –tcycle n+1

1000 Cycles

tcycle n

tcycle n+1

nQFB,

nQAx:nQDx

QFB,

QAx:QDx

t

PW

t

PERIOD

t

PW

t

PERIOD

odc =

x 100%

QFB,

QAx:QDx

nQFB,

nQAx:nQDx

STATIC PHASE OFFSET

CYCLE-TO-CYCLE JITTER

tsk(

ω)

nQxx

Qxx

nQyy

Qyy

➤ t(Ø)

V

OH

V

OL

V

OH

V

OL

TEST_CLK

QFB,

QAx:QDx

nQFB,

nQAx:nQDx

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