W632GU6NB
Publication Release Date: Aug. 20, 2018
Revision: A01
- 120 -
10.11 Input/Output Capacitance
PARAMETER
SYMBOL
DDR3L-1333 DDR3L-1600 DDR3L-1866 DDR3L-2133
UNIT
NOTES
MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX.
Input/output capacitance
(DQ, DM, DQS, DQS#)
C
IO
1.4
2.3
1.4
2.2
1.4
2.1
1.4
2.0
pF
1, 2, 3
Input capacitance
(CK and CK#)
C
CK
0.8
1.4
0.8
1.4
0.8
1.3
0.8
1.3
pF
2, 3
Delta of input capacitance
(CK and CK#)
C
DCK
0
0.15
0
0.15
0
0.15
0
0.15
pF
2, 3, 4
Delta of Input/Output capacitance
(DQS and DQS#)
C
DDQS
0
0.15
0
0.15
0
0.15
0
0.15
pF
2, 3, 5
Input capacitance
(CTRL, ADD, CMD input-only pins)
C
I
0.75
1.3
0.75
1.2
0.75
1.2
0.75
1.2
pF
2, 3, 6
Delta of input capacitance
(All CTRL input-only pins)
C
DI_CTRL
-0.4
0.2
-0.4
0.2
-0.4
0.2
-0.4
0.2
pF
2, 3, 7, 8
Delta of input capacitance
(All ADD/CMD input-only pins)
C
DI_ADD_CMD
-0.4
0.4
-0.4
0.4
-0.4
0.4
-0.4
0.4
pF
2, 3, 9, 10
Delta of Input/output capacitance
(DQ, DM, DQS, DQS#)
C
DIO
-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 signal
C
ZQ
3
3
3
3
pF
2, 3, 12
Notes:
1. Although the DM signals 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 V
DD
, V
DDQ
, V
SS
, V
SSQ
applied and all
other pins floating (except the ball under test, CKE, RESET# and ODT as necessary). V
DD
=V
DDQ
=1.35V, V
BIAS
=V
DD
/2 and on-die
termination off.
3. This parameter applies to monolithic devices only; stacked/dual-die devices are not covered here.
4. Absolute value of C
CK
-C
CK
#.
5. Absolute value of C
IO
(DQS)-C
IO
(DQS#).
6. C
I
applies to ODT, CS#, CKE, A0-A13, BA0-BA2, RAS#, CAS#, WE#.
7. C
DI_CTRL
applies to ODT, CS# and CKE.
8. C
DI_CTRL
=C
I
(CTRL)-0.5*(C
I
(CLK)+C
I
(CLK#)).
9. C
DI_ADD_CMD
applies to A0-A13, BA0-BA2, RAS#, CAS# and WE#.
10. C
DI_ADD_CMD
=C
I
(ADD_CMD) - 0.5*(C
I
(CLK)+C
I
(CLK#)).
11. C
DIO
=C
IO(DQ,DM)
- 0.5*(C
IO(DQS)
+C
IO(DQS#)
).
12. Maximum external load capacitance on ZQ
signal: 5 pF.