Rev. 1.2 / Jul.2017

33

Input/Output Capacitance

NOTE :

1. This parameter is not subject to production test. It is verified by design and characterization. The silicon only capacitance is vali-

dated by de-embedding the package L & C parasitic. The capacitance is measured with VDD, VDDQ, VSS, VSSQ applied with all

other signal pins floating. Measurement procedure tbd.

2. DQ, DM_n, DQS_T, DQS_C, TDQS_T, TDQS_C. Although the DM, TDQS_T and TDQS_C pins have different functions, the loading

matches DQ and DQS

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

4. Absolute value CK_T-CK_C

5. Absolute value of CIO(DQS_T)-CIO(DQS_C)

6. CI applies to ODT, CS_n, CKE, A0-A17, BA0-BA1, BG0-BG1, RAS_n/A16, CAS_n/A15, WE_n/A14, ACT_n and PAR.

7. CDI CTRL applies to ODT, CS_n and CKE

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

9. CDI_ADD_ CMD applies to, A0-A17, BA0-BA1, BG0-BG1,RAS_n/A16, CAS_n/A15, WE_n/A14, ACT_n and PAR.

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

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

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

system shall verify TEN signal with Vendor specific information.

Silicon pad I/O Capacitance

Symbol

Parameter

DDR4-

1600,1866,2133

DDR4-2400,2666

Unit NOTE

min

max

min

max

Input/output capacitance

0.55

1.4

0.55

1.15

pF

1,2,3

Input/output capacitance delta

-0.1

0.1

-0.1

0.1

pF 1,2,3,11

Input/output capacitance delta

DQS_t and DQS_c

0.05

0.05

pF

1,2,3,5

Input capacitance, CK_t and

CK_c

0.2

0.8

0.2

0.7

pF

1,3

Input capacitance delta CK_t and

CK_c

0.05

0.05

pF

1,3,4

Input capacitance

(CTRL, ADD, CMD pins only)

0.2

0.8

0.2

0.7

pF

1,3,6

Input capacitance delta

(All CTRL pins only)

-0.1

0.1

-0.1

0.1

pF

1,3,7,8

Input capacitance delta

(All ADD/CMD pins only)

-0.1

0.1

-0.1

0.1

pF 1,2,9,10

Input/output capacitance of

ALERT

0.5

1.5

0.5

1.5

pF

1,3

Input/output capacitance of ZQ

-

2.3

-

2.3

pF

1,3,12

Input capacitance of TEN

0.2

2.3

0.2

2.3

pF

1,3,13