K4B1G0446C Datasheet, PDF (19/63 Pages) Samsung semiconductor – 1Gb C-die DDR3 SDRAM Specification

K4B1G04(08/16)46C
1Gb DDR3 SDRAM
8.5 Slew rate definition for Single Ended Input Signals
8.5.1 Input Slew Rate for Input Setup Time (tIS) and Data Setup Time (tDS)
Setup (tIS and tDS) nominal slew rate for a rising signal is defined as the slew rate between the last crossing of VRef and the first crossing of
VIH(AC)min. Setup (tIS and tDS) nominal slew rate for a falling signal is defined as the slew rate between the last crossing of VRef and the first crossing
of VIL(AC)max.
8.5.2 Input Slew Rate for Input Hold Time (tIH) and Data Hold Time (tDH)
Hold nominal slew rate for a rising signal is defined as the slew rate between the last crossing of VIL(DC)max and the first crossing of VRef. Hold (tIH &
tDH) nominal slew rate for a falling signal is defined as the slew rate between the last crossing of VIH(DC)min and the first crossing of VRef
Description
Input slew rate for rising edge
Input slew rate for falling edge
Input slew rate for rising edge
Input slew rate for falling edge
Measured
From
To
Vref
Vih(AC)min
Vref
Vil(AC)max
Vil(DC)max Vref
Vih(DC)min Vref
Defined by
Vih(AC)min-Vref
Delta TRS
Vref-Vil(AC)max
Delta TFS
Vref-Vil(DC)max
Delta TFH
Vih(DC)min-Vref
Delta TRH
Applicable for
Setup
(tIS,tDS)
Hold
(tIH,tDH)
[ Table 12 ] Single Ended Input Slew Rate definition
Notes: This nominal slew rate applies for linear signal waveforms.
V_SWING(MAX)
delta TFS
delta TRS
< Figure : Input slew rate for setup>
V_DDQ
V_IH(ac) min
V_IH(dc) min
V_REF
V_IL(dc) max
V_IL(ac) max
V_SSQ
V_SWING(MAX)
delta TFH
delta TRH
< Figure : Input slew rate for Hold>
Figure 5. Input Nominal Slew Rate definition for Singel ended Signals
V_DDQ
V_IH(ac) min
V_IH(dc) min
V_REF
V_IL(dc) max
V_IL(ac) max
V_SSQ
8.6 Slew rate definition for Differential Input Signals
Description
Measured
From
To
Differential input slew rate for rising edge (CK-
CK and DQS-DQS)
VILdiffmax
VIHdiffmin
Differential input slew rate for falling edge (CK-
CK and DQS-DQS)
VIHdiffmin
VILdiffmax
[ Table 13 ] Differential input slew rate definition
Defined by
VIHdiffmin - VILdiffmax
Delta TRdiff
VIHdiffmin - VILdiffmax
Delta TFdiff
Note : The differential signal (i.e. CK - CK and DQS - DQS) must be linear between these thresholds
VDDQ
VIHdiffmin
V_SWING(MAX)
V_REF
delta TFdiff
delta TRdiff
VILdiffmax
VSSQ
Figure 6. Differential Input Slew Rate definition for DQS, DQS and CK, CK
Page 19 of 63
Rev. 1.0 June 2007