Shivaki STV-24LEDGR7, Service Manual

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K4T51163QI
datasheet
DDR2 SDRAM
Rev. 1.0
K4T51083QI
K4T51043QI
6. Absolute Maximum Ratings
NOTE :
1. Stresses greater than those listed under “Absolute Maximum Ratings” 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. V
DD
and V
DDQ
must be within 300mV of each other at all times; and V
REF
must be not greater than 0.6 x V
DDQ
. When V
DD
and V
DDQ
and V
DDL
are less than 500mV, V
REF
may be equal to or less than 300mV.
4. Voltage on any input or I/O may not exceed voltage on V
DDQ
.
7. AC & DC Operating Conditions
7.1 Recommended DC operating Conditions (SSTL_1.8)
NOTE : There is no specific device V
DD
supply voltage requirement for SSTL-1.8 compliance. However under all conditions V
DDQ
must be less than or equal to V
DD
.
1. The value of V
REF
may be selected by the user to provide optimum noise margin in the system. Typically the value of V
REF
is expected to be about 0.5 x V
DDQ
of the transmitting
device and V
REF
is expected to track variations in V
DDQ
.
2. Peak to peak AC noise on V
REF
may not /-2% V
REF
(DC).
3. V
TT
of transmitting device must track V
REF
of receiving device.
4. AC parameters are measured with V
DD
, V
DDQ
and V
DDL
tied together.
Symbol Parameter Rating Units NOTE
V
DD
Voltage on V
DD
pin relative to V
SS
- 1.0 V ~ 2.3 V V 1
V
DDQ
Voltage on V
DDQ
pin relative to V
SS
- 0.5 V ~ 2.3 V V 1
V
DDL
Voltage on V
DDL
pin relative to V
SS
- 0.5 V ~ 2.3 V V 1
V
IN,
V
OUT
Voltage on any pin relative to V
SS
- 0.5 V ~ 2.3 V V 1
T
STG
Storage Temperature -55 to +100
°
C 1, 2
Symbol Parameter
Rating
Units NOTE
Min. Typ. Max.
V
DD
Supply Voltage 1.7 1.8 1.9 V
V
DDL
Supply Voltage for DLL 1.7 1.8 1.9 V 4
V
DDQ
Supply Voltage for Output 1.7 1.8 1.9 V 4
V
REF
Input Reference Voltage 0.49*V
DDQ
0.50*V
DDQ
0.51*V
DDQ
mV 1,2
V
TT
Termination Voltage V
REF
-0.04 V
REF
V
REF
+0.04 V 3
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