m391t2953cz3-ce7 Samsung Semiconductor, Inc., m391t2953cz3-ce7 Datasheet - Page 12

• Manufacturer Part Number: m391t2953cz3-ce7
• Description: Ddr2 Unbuffered Sdram Module 240pin Unbuffered Module Based On 512mb C-die 64/72-bit Non-ecc/ecc
• Manufacturer: Samsung Semiconductor, Inc.

Operating Temperature Condition
Note :
1. Operating Temperature is the case surface temperature on the center/top side of the DRAM. For the measurement conditions, please refer to JESD51.2
2. At 85 - 95 qC operation temperature range, doubling refresh commands in frequency to a 32ms period ( tREFI=3.9 us ) is required, and to enter to self
Input DC Logic Level
Input AC Logic Level
AC Input Test Conditions
Notes:
1. Input waveform timing is referenced to the input signal crossing through the V
2. The input signal minimum slew rate is to be maintained over the range from V
3. AC timings are referenced with input waveforms switching from V
256MB, 512MB, 1GB Unbuffered DIMMs
standard.
refresh mode at this temperature range, an EMRS command is required to change internal refresh rate.
max for falling edges as shown in the below figure.
transitions.
V
SWING(MAX)
Symbol
V
Symbol
V
V
Symbol
V
SLEW
IH
IH
IL
Symbol
IL
TOPER
V
(DC)
(AC)
(AC)
REF
(DC)
Input reference voltage
Input signal maximum peak to peak swing
Input signal minimum slew rate
AC input logic high
AC input logic low
Parameter
DC input logic high
DC input logic low
Parameter
V
Falling Slew =
SWING(MAX)
Operating Temperature
Parameter
delta TF
Condition
V
V
REF
REF
< AC Input Test Signal Waveform >
Min.
DDR2-400, DDR2-533
- V
delta TF
+ 0.250
-
IL
(AC) max
V
IL
REF
(AC) to V
Min.
- 0.3
+ 0.125
V
REF
Max.
delta TR
- 0.250
IH
-
IH/IL
REF
(AC) on the positive transitions and V
Rising Slew =
(AC) level applied to the device under test.
to V
Rating
0 to 95
IH
V
(AC) min for rising edges and the range from V
V
REF
V
0.5 * V
DDQ
REF
Max.
Value
- 0.125
1.0
1.0
Min.
+ 0.3
DDR2-667, DDR2-800
+ 0.200
V
DDQ
IH
(AC) min - V
V
V
V
V
V
V
V
delta TR
DDQ
IH
IH
REF
IL
IL
SS
(DC) max
(AC) max
(AC) min
(DC) min
V
REF
Units
REF
qC
Max.
Units
- 0.200
Units
Rev. 1.2 Aug. 2005
V/ns
V
V
IH
V
V
(AC) to V
DDR2 SDRAM
IL
Units
(AC) on the negative
V
V
Notes
1, 2, 3
REF
Notes
Notes
2, 3
1
1
to V
Notes
IL
(AC)