EM47FM3288SBB Datasheet, PDF (11/41 Pages) Eorex Corporation – 16Gb (64M×8Bank×32) Double DATA RATE 3 Stack SDRAM

EM47FM3288SBB
AC and DC Output Measurement Levels
Symbol Parameter
Specification Units ^Note
VOH(DC) DC output high measurement level (for IV curve linearity)
0.8*V_DDQ
V
VOM(DC) DC output middle measurement level (for IV curve linearity)
0.5*V_DDQ
V
VOL(DC) DC output low measurement level (for IV curve linearity)
0.2*V_DDQ
V
VOH(AC) AC output high measurement level (for output slew rate)
VTT+0.1*V_DDQ V
1
VOL(AC) AC output low measurement level (for output slew rate)
VTT-0.1*V_DDQ V
1
VOHdiff(DC) AC differential output high measurement level (for output
slew rate)
0.2*V_DDQ
V
2
VOLdiff(DC) AC differential output low measurement level (for output
slew rate)
-0.2*V_DDQ
V
2
Notes1. The swing of ±0.1 × VDDQ is based on approximately 50% of the static single-ended output high or
low swing with a driver impedance of 34Ω and an effective test load of 25Ω to VTT = VDDQ/2 at each of the
differential outputs.
Notes2. The swing of ±0.2 × VDDQ is based on approximately 50% of the static single-ended output high or
low swing with a driver impedance of 34Ω and an effective test load of 25Ω to VTT = VDDQ/2 at each of the
differential outputs.
DQS Output Crossing Voltage - VOX (DDR3-1600 or Higher Speed Bin)
Symbol
Parameters
DQS, /DQS differential slew rate
5V/ns 6V/ns 7V/ns 8V/ns 9V/ns
10V/ns
11V/ns
12V/ns
Unit
V_OX
max.
(AC) ^{Deviation of DQS,}
/DQS output
cross point
+100
+120
+140
+160
+180
+200
+200
+200 mV
V_OX (AC) min.
voltage from
0.5*V _DDQ
-100 -120 -140 -160 -180 -200 -200 -200 mV
DQS Output Crossing Voltage - VOX (DDR3-1333 or Lower Speed Bin)
Symbol
Parameters
DQS, /DQS differential slew rate
5V/ns 6V/ns 7V/ns 8V/ns 9V/ns
10V/ns
11V/ns
12V/ns
Unit
V_OX
max.
(AC) ^{Deviation of DQS,}
/DQS output
cross point
+125
+150
+175
+200
+225
+225
+225
+225 mV
V_OX (AC) min.
voltage from
0.5*V _DDQ
-125 -150 -175 -200 -225 -225 -225 -225 mV
Notes1. Measured using an effective test load of 25Ω to 0.5* V_DDQ at each of the differential outputs.
Notes2. For a differential slew rate in between the listed values, the V_OX value may be obtained by linear
interpolation.
Notes3. The DQS, /DQS pins under test are not required to be able to drive each of the slew rates listed in the
table; the pins under test will provide one V_OX value when tested with specified test condition. The DQS and
/DQS differential slew rate when measuring V_OX determines which V_OX limits to use.
Jul. 2012
11/41
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