k4b2g0846b Samsung Semiconductor, Inc., k4b2g0846b Datasheet - Page 18
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k4b2g0846b
Manufacturer Part Number
k4b2g0846b
Description
2gb B-die Ddr3 Sdram Specification
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.K4B2G0846B.pdf
(61 pages)
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K4B2G04(08/16)46B
[ Table 12 ] Cross point voltage for differential input signals (CK, DQS)
Note :
1. Extended range for V
8.6 Slew rate definition for Differential Input Signals
Input slew rate for differential signals (CK, CK and DQS, DQS) are defined and measured as shown in Table 13 and Figure 5.
8.4 Differential Input Cross Point Voltage
8.5 Slew Rate Definition for Single Ended Input Signals
[ Table 13 ] Differential input slew rate definition
Note : The differential signal (i.e. CK - CK and DQS - DQS) must be linear between these thresholds
To guarantee tight setup and hold times as well as output skew parameters with respect to clock and strobe, each cross point voltage of differential input
signals (CK, CK and DQS, DQS) must meet the requirements in below table. The differential input cross point voltage V
cross point of true and complement signal to the mid level between of V
See 14.3 "Address / Command Setup, Hold and Derating" for single-ended slew rate definitions for address and command signals.
See 14.4 "Data Setup, Hold and Slew Rate Derating" for single-ended slew rate definitions for data signals.tDH nominal slew rate for a falling signal is
Differential input slew rate for rising edge (CK-CK and DQS-DQS)
Differential input slew rate for falling edge (CK-CK and DQS-DQS)
Symbol
V
dard values.
SEH
V
V
IX
IX
of at least V
defined as the slew rate between the last crossing of V
Differential Input Cross Point Voltage relative to V
Differential Input Cross Point Voltage relative to V
DD
/2 =/-250 mV, and the differential slew rate of CK-CK is larger than 3 V/ ns. Refer to table 11 on page 17 for V
IX
is only allowed for clock and if single-ended clock input signals CKand CK are monotonic, have a single-ended swing V
Description
Figure 5. Differential Input Slew Rate definition for DQS, DQS and CK, CK
Parameter
V
IX
Figure 4. V
delta TFdiff
DD
DD
IH
V
/2 for CK,CK
/2 for DQS,DQS
Page 18 of 61
IX
IX
(DC)min and the first crossing of V
Definition
DD
and V
V
V
ILdiffmax
From
IHdiffmin
SS
V
Measured
IX
.
delta TRdiff
V
V
-150
-175
-150
IHdiffmin
ILdiffmax
Min
DDR3-800/1066/1333/1600
To
REF
V
CK, DQS
V
CK, DQS
V
V
0
V
DD
DD
SS
IHdiffmin
ILdiffmax
/2
2Gb DDR3 SDRAM
Rev. 1.0 December 2008
Max
V
V
150
175
150
IHdiffmin
IHdiffmin
IX
Delta TRdiff
Defined by
Delta TFdiff
is measured from the actual
- V
- V
ILdiffmax
ILdiffmax
SEL
Unit
mV
mV
mV
and V
SEH
Notes
1
stan-
SEL
/