6

Integrated Silicon Solution, Inc. — www.issi.com

Rev.  00E

09/08/2010

IS43DR32800A, IS43/46DR32801A

ELECTRICAL SPECIFICATIONS

Absolute Maximum DC Ratings

Symbol 

Parameter 

Rating 

Units  Notes

VoltageonVDDpinrelativetoVss

-1.0V~2.3V

V

1,3

VoltageonVDDQpinrelativetoVss

-0.5V~2.3V

V

1,3

VoltageonVDDLpinrelativetoVss

-0.5V~2.3V

V

1,3

VoltageonanypinrelativetoVss

-0.5V~2.3V

V

1,4

StorageTemperature

-55to+150

°C

1,2

Notes:

1.Stressesgreaterthanthoselistedunder“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thisisastressratingonly

andfunctionaloperationofthedeviceattheseoranyotherconditionsabovethoseindicatedintheoperationalsectionsofthisspecificationis

notimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectreliability

2.StorageTemperatureisthecasesurfacetemperatureonthecenter/topsideoftheDRAM.Forthemeasurementconditions,pleasereferto

JESD51-2standard.

3.VDDandVDDQmustbewithin300mVofeachotheratalltimes;andVREFmustbenotgreaterthan0.6xVDDQ.WhenVDDandVDDQand

VDDLarelessthan500mV,Vrefmaybeequaltoorlessthan300mV.

4.VoltageonanyinputorI/OmaynotexceedvoltageonVDDQ.

AC & DC Recommended Operating Conditions

Recommended DC Operating Conditions (SSTL-1.8)

Symbol

Parameter

Rating

Units Notes

Min.

Typ.

Max.

VDD

SupplyVoltage

1.7

1.8

1.9

V

1

VDDL

SupplyVoltageforDLL

1.7

1.8

1.9

V

5

VDDQ

SupplyVoltageforOutput

1.7

1.8

1.9

V

1,5

VREF

InputReferenceVoltage

0.49xVDDQ

0.50xVDDQ

0.51xVDDQ

mV 2.3

VTT

TerminationVoltage

VREF-0.04

VREF

VREF+0.04

V

4

Notes:

1.ThereisnospecificdeviceVDDsupplyvoltagerequirementforSSTL_18compliance.HoweverunderallconditionsVDDQmustbelessthan

orequaltoVDD.

2.ThevalueofVREFmaybeselectedbytheusertoprovideoptimumnoisemargininthesystem.TypicallythevalueofVREFisexpectedtobe

about0.5xVDDQofthetransmittingdeviceandVREFisexpectedtotrackvariationsinVDDQ.

3.PeaktopeakacnoiseonVREFmaynotexceed+/-2%VREF(dc).

4.VTToftransmittingdevicemusttrackVREFofreceivingdevice.

5.VDDQtrackswithVDD,VDDLtrackswithVDD.ACparametersaremeasuredwithVDD,VDDQandVDDDLtiedtogether