W632GU8KB Datasheet, PDF (119/160 Pages) Winbond – 32M X 8 BANKS X 8 BIT DDR3L SDRAM

W632GU8KB
10.11 Input/Output Capacitance
PARAMETER
DDR3L-1333 DDR3L-1600 DDR3L-1866
SYMBOL
UNIT NOTES
MIN. MAX. MIN. MAX. MIN. MAX.
Input/output capacitance
(DQ, DM, DQS, DQS#, TDQS, TDQS#)
CIO
1.4 2.3 1.4 2.2 1.4 2.1 pF 1,2,3
Input capacitance
(CK and CK#)
CCK
0.8 1.4 0.8 1.4 0.8 1.3 pF
2,3
Delta of input capacitance
(CK and CK#)
CDCK
0
0.15
0
0.15
0
0.15 pF 2,3,4
Delta of Input/Output capacitance
(DQS and DQS#)
CDDQS
0
0.15
0
0.15
0
0.15 pF 2,3,5
Input capacitance
(CTRL, ADD, CMD input-only pins)
CI
0.75 1.3 0.75 1.2 0.75 1.2 pF 2,3,6
Delta of input capacitance
(All CTRL input-only pins)
CDI_CTRL -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)
CDI_ADD_CMD -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#, TDQS, TDQS#)
CDIO
-0.5 0.3 -0.5 0.3 -0.5 0.3 pF 2,3,11
Input/output capacitance of ZQ signal
CZQ

3

3

3
pF 2,3,12
Notes:
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 VDD, VDDQ,
VSS, VSSQ applied and all other pins floating (except the ball under test, CKE, RESET# and ODT as necessary).
VDD=VDDQ=1.35V, VBIAS=VDD/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 CCK-CCK#.
5. Absolute value of CIO(DQS)-CIO(DQS#).
6. CI applies to ODT, CS#, CKE, A0-A14, 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-A14, 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 signal: 5 pF.
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Publication Release Date: Jan. 20, 2015
Revision: A05