 English |
|
|
|
|
|
|
|
| K4T1G044QF Datasheet, PDF (12/46 Pages) Samsung semiconductor – 1Gb F-die DDR2 SDRAM | |||
| |||
| ◁ |
K4T1G044QF
K4T1G084QF
K4T1G164QF
datasheet
Rev. 1.11
DDR2 SDRAM
6. Absolute Maximum Ratings
Symbol
Parameter
Rating
Units
NOTE
VDD
Voltage on VDD pin relative to VSS
- 1.0 V ~ 2.3 V
V
1
VDDQ
Voltage on VDDQ pin relative to VSS
- 0.5 V ~ 2.3 V
V
1
VDDL
Voltage on VDDL pin relative to VSS
- 0.5 V ~ 2.3 V
V
1
VIN, VOUT Voltage on any pin relative to VSS
- 0.5 V ~ 2.3 V
V
1
TSTG
Storage Temperature
-55 to +100
°C
1, 2
NOTE :
1. Stresses greater than those listed under âAbsolute Maximum Ratingsâ may cause permanent damage to the device. This is a stress rating only and functional operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions
for extended periods may affect reliability.
2. Storage Temperature is the case surface temperature on the center/top side of the DRAM. For the measurement conditions, please refer to JESD51-2 standard.
3. VDD and VDDQ must be within 300mV of each other at all times; and VREF must be not greater than 0.6 x VDDQ. When VDD and VDDQ and VDDL are less than 500mV, VREF
may be equal to or less than 300mV.
4. Voltage on any input or I/O may not exceed voltage on VDDQ.
7. AC & DC Operating Conditions
7.1 Recommended DC operating Conditions (SSTL_1.8)
Symbol
Parameter
Min.
Rating
Typ.
Max.
Units
NOTE
VDD
Supply Voltage
1.7
1.8
1.9
V
VDDL
Supply Voltage for DLL
1.7
1.8
1.9
V
4
VDDQ
Supply Voltage for Output
1.7
1.8
1.9
V
4
VREF
Input Reference Voltage
0.49*VDDQ
0.50*VDDQ
0.51*VDDQ
mV
1,2
VTT
Termination Voltage
VREF-0.04
VREF
VREF+0.04
V
3
NOTE : There is no specific device VDD supply voltage requirement for SSTL-1.8 compliance. However under all conditions VDDQ must be less than or equal to VDD.
1. The value of VREF may be selected by the user to provide optimum noise margin in the system. Typically the value of VREF is expected to be about 0.5 x VDDQ of the transmitting
device and VREF is expected to track variations in VDDQ.
2. Peak to peak AC noise on VREF may not exceed +/-2% VREF(DC).
3. VTT of transmitting device must track VREF of receiving device.
4. AC parameters are measured with VDD, VDDQ and VDDL tied together.
- 12 -
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese