EBD25RB4ALFA-7A

更新时间： 2024-02-25 16:02:43

品牌	Logo	应用领域
尔必达 - ELPIDA		动态存储器双倍数据速率
页数	文件大小	规格书
17页	130K
描述
256MB Registered DDR SDRAM DIMM

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数据手册

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EBD25RB4ALFA-7A 数据手册

EBD25RB4ALFA

Synchronous Characteristics Example

tCK

7.5 ns

min.

3.4

10 ns

min.

4.5

Symbol

tCH

max.

4.1

8.25

4.5

—

max.

5.5

Unit

tCL

3.4

tRPRE

tRPST

tWPRE

tWPST

tDQSS

tDQSH

tDQSL

tDSS

6.75

0.25

2.5

—

4.5

9.4

—

5.6

7.5

3.5

12.5

—

2.63

1.5

—

tDSH

1.5

—

tWTR

7.5

—

Asynchronous Characteristics

-7A

-75

-1A

Parameter

Symbol

tRC

min.

max.

min.

max.

—

min.

max.

—

Unit

ACT to REF/ACT command period

(operation)

—

REF to REF/ACT command period

(refresh)

tRFC

—

ACT to PRE command period

PRE to ACT command period

ACT to READ/WRITE delay

tRAS

tRP

120,000 45

120,000 50

120,000 ns

—

tRCD

ACT(one) to ACT(another) command

period

tRRD

tWR

—

Write recovery time

CLK

Auto precharge write recovery time

+ precharge time

tDAL

TBD

Mode register set command cycle time

Exit self refresh to command

tMRD

—

µs

tXSNR

tREF1

—

Average periodic Refresh interval

15.6

Preliminary Data Sheet E0211E11 (Ver. 1.1)

1...11 12 131415 16 17

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