Rev. 1.3 Aug. 2005

256MB, 512MB Unbuffered DIMMs

DDR2 SDRAM

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 standard.

2. At 0 - 85

°C, operation temperature range are the temperature which all DRAM specification will be supported.

3. At 85 - 95

°C operation temperature range, doubling refresh commands in frequency to a 32ms period ( tREFI=3.9 us ) is required, and to enter to self

refresh mode at this temperature range, an EMRS command is required to change internal refresh rate.

Input DC Logic Level

Input AC Logic Level

AC Input Test Conditions

Notes:

max for falling edges as shown in the below figure.

transitions.

Symbol

Parameter

Rating

Units

Notes

TOPER

Operating Temperature

0 to 95

°C

1, 2, 3

Symbol

Parameter

Min.

Max.

Units

Notes

DC input logic high

V

DC input logic low

V

Symbol

Parameter

DDR2-400, DDR2-533

DDR2-667

Units

Notes

Min.

Max.

Min.

Max.

AC input logic high

-

V

AC input logic low

-

V

Symbol

Condition

Value

Units

Notes

Input reference voltage

V1

Input signal maximum peak to peak swing

1.0

V

1

SLEW

Input signal minimum slew rate

1.0

V/ns

2, 3

< AC Input Test Signal Waveform >

delta TR

delta TF

delta TF

Falling Slew =

Rising Slew =

delta TR