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HYB25D512400C Datasheet, PDF (27/37 Pages) Qimonda AG – DDR SDRAM
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Internet Data Sheet
HYB25D512[400/160/800]C[E/T/F/C](L)
512-Mbit Double-Data-Rate SDRAM
TABLE 19
AC Operating Conditions
Parameter
Symbol
Min.
Values
Max.
Unit Note/ Test Note1)
Condition
Input High (Logic 1) Voltage, DQ, DQS and DM Signals VIH(AC) VREF + 0.31 —
V
2)3)
Input Low (Logic 0) Voltage, DQ, DQS and DM Signals VIL(AC) —
VREF – 0.31 V
2)3)
Input Differential Voltage, CK and CK Inputs
VID(AC)
0.7
VDDQ + 0.6 V
2)3)4)
Input Closing Point Voltage, CK and CK Inputs
VIX(AC)
0.5 × VDDQ– 0.5 × VDDQ+ V
0.2
0.2
2)3)5)
1) VDDQ = 2.5 V ± 0.2 V, VDD = +2.5 V ± 0.2 V (DDR200 - DDR333); VDDQ = 2.6 V ± 0.1 V, VDD = +2.6 V ± 0.1 V (DDR400); 0 °C ≤ TA ≤ 70 °C
2) Input slew rate = 1 V/ns.
3) Inputs are not recognized as valid until VREF stabilizes.
4) VID is the magnitude of the difference between the input level on CK and the input level on CK.
5) The value of VIX is expected to equal 0.5 × VDDQ of the transmitting device and must track variations in the DC level of the same.
Parameter
Symbol
TABLE 20
AC Timing - Absolute Specifications for PC3200 and PC2700
–5
DDR400B
–6
DDR333
Unit Note/ Test
Condition 1)
DQ output access time from
tAC
CK/CK
CK high-level width
tCH
Clock cycle time
tCK
CK low-level width
tCL
Auto precharge write recovery + tDAL
precharge time
DQ and DM input hold time
DQ and DM input pulse width
(each input)
tDH
tDIPW
DQS output access time from
CK/CK
tDQSCK
DQS input low (high) pulse width tDQSL,H
(write cycle)
DQS-DQ skew (DQS and
associated DQ signals)
tDQSQ
Min.
–0.5
Max.
+0.5
0.45
0.55
5
8
6
12
7.5
12
0.45
0.55
(tWR/tCK)+(tRP/tCK)
0.4
—
1.75
—
–0.6
+0.6
0.35
—
—
+0.40
—
+0.40
Min.
–0.7
0.45
6
6
7.5
0.45
0.45
1.75
–0.6
0.35
—
—
Write command to 1st DQS
latching transition
tDQSS
0.72
1.25
0.75
Max.
+0.7
ns
2)3)4)5)
0.55
12
12
12
0.55
—
—
tCK
2)3)4)5)
ns CL = 3.0 2)3)4)5)
ns CL = 2.5 2)3)4)5)
ns CL = 2.0 2)3)4)5)
tCK
2)3)4)5)
tCK
2)3)4)5)6)
ns
2)3)4)5)
ns
2)3)4)5)6)
+0.6
ns
2)3)4)5)
—
tCK
2)3)4)5)
+0.40 ns TFBGA
2)3)4)5)
+0.45 ns TSOPII
2)3)4)5)
1.25
tCK
2)3)4)5)
Rev. 1.31, 2006-09
27
03292006-3TFJ-HNV3
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