Internet Data Sheet
HY[B/I]25D256[16/40/80]0C[E/C/F/T](L)
256 Mbit Double-Data-Rate SDRAM
TABLE 18
Electrical Characteristics and DC Operating Conditions
Parameter
Symbol
Values
Unit Note/Test Condition1)
Min.
Typ.
Max.
Device Supply Voltage
Device Supply Voltage
Output Supply Voltage
Output Supply Voltage
VDD
2.3
2.5
2.3
2.5
0
2.5
2.6
2.5
2.6
—
2.7
2.7
2.7
2.7
0
V
V
V
V
V
fCK ≤ 166 MHz
f
CK > 166 MHz2)
fCK ≤ 166 MHz3)
VDD
VDDQ
VDDQ
fCK > 166 MHz 2)3)
Supply Voltage, I/O Supply VSS, VSSQ
Voltage
4)
5)
Input Reference Voltage
VREF
VTT
0.49 × VDDQ 0.5 × VDDQ 0.51 × VDDQ
V
V
I/O Termination Voltage
(System)
VREF – 0.04
—
VREF + 0.04
6)
6)
6)
Input High (Logic1) Voltage VIH(DC)
Input Low (Logic0) Voltage VIL(DC)
VREF + 0.15
–0.3
—
—
—
VDDQ + 0.3
VREF – 0.15
VDDQ + 0.3
V
V
V
Input Voltage Level, CK and VIN(DC)
–0.3
CK Inputs
6)7)
8)
Input Differential Voltage,
CK and CK Inputs
VID(DC)
0.36
0.71
–2
—
—
—
—
—
—
VDDQ + 0.6
V
VI-Matching Pull-up Current VRatio
to Pull-down Current
1.4
2
—
µA
µA
Input Leakage Current
Output Leakage Current
II
Any input 0 V ≤ VIN ≤ VDD; All
other pins not under test = 0 V9)
IOZ
–5
5
DQs are disabled; 0 V ≤ VOUT
VDDQ
≤
9)
Output High Current, Normal IOH
Strength Driver
—
–16.2
—
mA VOUT = 1.95 V
mA VOUT = 0.35 V
Output Low Current, Normal IOL
16.2
Strength Driver
1) 0 °C ≤ TA ≤ 70 °C; VDDQ = 2.5 V ± 0.2 V, VDD = +2.5 V ± 0.2 V;
2) DDR400 conditions apply for all clock frequencies above 166 MHz
3) Under all conditions, VDDQ must be less than or equal to VDD
4) Peak to peak AC noise on VREF may not exceed ± 2% VREF.DC. VREF is also expected to track noise variations in VDDQ
5) TT is not applied directly to the device. VTT is a system supply for signal termination resistors, is expected to be set equal to VREF, and
must track variations in the DC level of VREF
6) Inputs are not recognized as valid until VREF stabilizes.
7) ID is the magnitude of the difference between the input level on CK and the input level on CK.
.
.
V
.
V
8) The ratio of the pull-up current to the pull-down current is specified for the same temperature and voltage, over the entire temperature and
voltage range, for device drain to source voltage from 0.25 to 1.0 V. For a given output, it represents the maximum difference between
pull-up and pull-down drivers due to process variation.
9) Values are shown per pin.
Rev. 2.3, 2007-03
24
03062006-8CCM-VPUW
QIMONDA [ QIMONDA AG ]
