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HYB25D256400BT Datasheet, PDF (52/77 Pages) Infineon Technologies AG – 256-Mbit Double Data Rate SDRAM, Die Rev. B
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HYB25D256[400/800/160]B[T/C](L)
256-Mbit Double Data Rate SDRAM, Die Rev. B
Electrical Characteristics and DC Operating Conditions
(0°C £ TA £ 70°C; VDDQ = 2.5V ± 0.2V, VDD = + 2.5V ± 0.2V )
Symbol
Parameter
VDD Supply Voltage
VDDQ I/O Supply Voltage
VSS, VSSQ Supply Voltage, I/O Supply Voltage
VREF I/O Reference Voltage
VTT
I/O Termination Voltage (System)
VIH(DC) Input High (Logic1) Voltage
VIL(DC) Input Low (Logic0) Voltage
VIN(DC) Input Voltage Level, CK and CK Inputs
VID(DC) Input Differential Voltage, CK and CK Inputs
VIRatio VI-Matching Pullup Current to Pulldown Current
II
Input Leakage Current. Any input 0V
(All other pins not under test = 0V)
£
VIN
£
VDD
IOZ
Output Leakage Current
(DQs are disabled; 0V £ Vout £ VDDQ
IOH
Output High Current, Normal Strength Driver
(VOUT = 1.95 V, VTT = 1.13 V)
IOL
Output Low Current, Normal Strength Driver
(VOUT = 0.35 V, VTT = 1.17 V)
Min
2.3
2.3
0
0.49 x VDDQ
VREF - 0.04
VREF + 0.15
- 0.3
- 0.3
0.36
0.71
-2
Max
2.7
2.7
0
0.51 x VDDQ
VREF + 0.04
VDDQ + 0.3
VREF - 0.15
VDDQ + 0.3
VDDQ + 0.6
1.4
2
-5
5
- 16.2
16.2
Units
V
V
V
V
V
V
V
V
V
mA
mA
mA
mA
Notes
1
1
1, 2
1, 3
1
1
1
1, 4
5
1
1
1
1
1. Inputs are not recognized as valid until VREF stabilizes.
2. VREF is expected to be equal to 0.5 VDDQ of the transmitting device, and to track variations in the DC level of the
same. Peak-to-peak noise on VREF may not exceed ± 2% of the DC value.
3. VTT 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.
4. VID is the magnitude of the difference between the input level on CK and the input level on CK
5. The ration of the pullup current to the pulldown 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 1.0V. For a given output, it rep-
resents the maximum difference between pullup and pulldown drivers due to process variation.
Page 52 of 77
2003-01-09, V1.1
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