EM422M1684LBA-75FE datasheet(8/20 Pages) EOREX

Part #	EM422M1684LBA-75FE

Description	512Mb (8M횞4Bank횞16) Double DATA RATE SDRAM

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Manufacturer	EOREX [Eorex Corporation]

Direct Link	http://www.eorex.com

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8 / 20 page

eorex

EM42BM1684LBA

Jul. 2006

www.eorex.com

AC Operating Test Characteristics (Continued)

(VDD=1.8V±0.1V, TA=0°C ~70°C)

-75

Units

Symbol

Parameter

Min.

Max.

tRPST

Read Postamble

0.4

0.6

tCK

tRAS

Active to Precharge command period

45

120k

ns

tRC

Active to Active command period

75

-

ns

tRFC

Auto Refresh Row Cycle Time

108

-

ns

tRCD

Active to Read or Write delay

30

-

ns

tRP

Precharge command period

22.5

-

ns

tRRD

Active bank A to B command period

15

-

ns

tCCD

Column address to column address

delay

1

-

tCK

tHZP

Pre-charge command to high-Z

3

-

tCK

tCDLW

Last data in to Write command

1

-

tCK

tDPL

Last data in to Precharge command

3

-

tCK

tSREX

Exit self refresh to non-col. command

16

-

tCK

tWTR

Internal Write to Read command delay

1

-

tCK

tCKE

CKE minimum pulse width

2

-

tCK

tWPD

Write to pre-charge delay(same bank)

3+BL/2

-

tCK

tRPD

Read to pre-charge delay(same bank)

BL/2

-

tCK

tWRD

Write to Read command delay

2+BL/2

-

tCK

tBSTW

Burst stop to write delay

3

-

tCK

tWRD

Write recovery

2

-

tCK

tREFI

Average periodic refresh interval

-

7.8

us

8/20

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