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datasheet

DDR3 SDRAM

Rev. 1.4

Unbuffered DIMM

16. Input/Output Capacitance

[ Table 14 ] Input/Output Capacitance

NOTE : This parameter is Component Input/Output Capacitance so that is different from Module level Capacitance.

1. Although the DM, TDQS and TDQS pins have different functions, the loading matches DQ and DQS

2. This parameter is not subject to production test. It is verified by design and characterization.

The capacitance is measured according to JEP147("PROCEDURE FOR MEASURING INPUT CAPACITANCE USING A VECTOR NETWORK ANALYZER( VNA)") with

termination off.

3. This parameter applies to monolithic devices only; stacked/dual-die devices are not covered here

4. Absolute value of CCK-CCK

5. Absolute value of CIO(DQS)-CIO(DQS)

6. CI applies to ODT, CS, CKE, A0-A15, BA0-BA2, RAS, CAS, WE.

7. CDI_CTRL applies to ODT, CS and CKE

8. CDI_CTRL=CI(CTRL)-0.5*(CI(CLK)+CI(CLK))

9. CDI_ADD_CMD applies to A0-A15, BA0-BA2, RAS, CAS and WE

10. CDI_ADD_CMD=CI(ADD_CMD) - 0.5*(CI(CLK)+CI(CLK))

11. CDIO=CIO(DQ,DM) - 0.5*(CIO(DQS)+CIO(DQS))

12. Maximum external load capacitance on ZQ pin: 5pF

Parameter

Symbol

DDR3-800

DDR3-1066

DDR3-1333

DDR3-1600

DDR3-1866

Units NOTE

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Input/output capacitance

(DQ, DM, DQS, DQS, TDQS, TDQS)

CIO

1.5

3.0

1.5

2.7

1.5

2.5

1.5

2.3

1.4

2.2

pF

1,2,3

Input capacitance

(CK and CK)

CCK

0.8

1.6

0.8

1.6

0.8

1.4

0.8

1.4

0.8

1.3

pF

2,3

Input capacitance delta

(CK and CK)

CDCK

0

0.15

0

0.15

0

0.15

0

0.15

0

0.15

pF

2,3,4

Input capacitance

(All other input-only pins)

CI

0.75

1.5

0.75

1.5

0.75

1.3

0.75

1.3

0.75

1.2

pF

2,3,6

Input capacitance delta

(DQS and DQS)

CDDQS

0

0.2

0

0.2

0

0.15

0

0.15

0

0.15

pF

2,3,5

Input capacitance delta

(All control input-only pins)

CDI_CTRL

-0.5

0.3

-0.5

0.3

-0.4

0.2

-0.4

0.2

-0.4

0.2

pF

2,3,7,8

Input capacitance delta

(all ADD and CMD input-only pins)

CDI_ADD_CMD

-0.5

0.5

-0.5

0.5

-0.4

0.4

-0.4

0.4

-0.4

0.4

pF

2,3,9,10

Input/output capacitance delta

(DQ, DM, DQS, DQS, TDQS, TDQS)

CDIO

-0.5

0.3

-0.5

0.3

-0.5

0.3

-0.5

0.3

-0.5

0.3

pF

2,3,11

Input/output capacitance of ZQ pin

CZQ

-

3

-

3

-

3

-

3

-

3

pF

2, 3, 12