IS43DR16640C datasheet(18/49 Pages) ISSI

18 / 49 page

Integrated Silicon Solution, Inc. — www.issi.com

Rev. 00A

6/4/2013

IS43/46DR81280C, IS43/46DR16640C

Timing Parameters by Speed Grade (DDR2-400 and DDR2-533) cont'd

(For information related to the entries in this table, refer to both the Guidelines and the Specific Notes following this Table.)

Parameter

Symbol

DDR2-400

DDR2-533

Units Notes

Min.

Max.

Min.

Max.

Active to active command period

tRRD

7.5

–

7.5

–

x16

–

Four Activate Window

tFAW

37.5

–

37.5

–

x16

–

CAS

to CAS command delay

tCCD

–

tCK

Write recovery time

tWR

–

Auto precharge write recovery + precharge

time

tDAL

WR + tRP

–

WR + tRP

–

tCK

Internal write to read command delay

tWTR

–

7.5

–

Internal read to precharge command delay tRTP

7.5

–

7.5

–

CKE minimum pulse width (HIGH and

LOW pulse width)

tCKE

–

tCK

Exit self refresh to a non-read command

tXSNR

tRFC + 10

–

tRFC + 10

–

Exit self refresh to a read command

tXSRD

200

–

200

–

tCK

Exit precharge power down to any non-

read command

tXP

–

tCK

Exit active power down to read command

tXARD

–

tCK

Exit active power down to read command

(slow exit, lower power)

tXARDS

6 - AL

–

6 - AL

–

tCK

1,2

ODT turn-on delay

tAOND

tCK

ODT turn-on

tAON

tAC(min)

tAC(max)+1

tAC(min)

tAC (max)+1

ODT turn-on (Power-Down mode)

tAONPD

tAC(min)+2

2 x tCK +

tAC(max)+1

tAC(min) + 2

2 x tCK +

tAC(max)+1

ODT turn-off delay

tAOFD

2.5

tCK

17,

ODT turn-off

tAOF

tAC(min)

tAC(max) +

0.6

tAC(min)

tAC(max) + 0.6

17,

ODT turn-off (Power-Down mode)

tAOFPD

tAC(min)+2

2.5 x tCK +

tAC(max)+1

tAC(min)+2

2.5 x tCK+

tAC(max)+1

ODT to power down entry latency

tANPD

–

tCK

ODT power down exit latency

tAXPD

–

tCK

Mode register set command cycle time

tMRD

–

tCK

MRS command to ODT update delay

tMOD

OCD drive mode output delay

tOIT

Minimum time clocks remains ON after

CKE asynchronously drops LOW

tDelay

tIS+tCK+tIH

–

tIS+tCK+tIH

–

IS43DR16640C Scheda tecnica(PDF) 18 Page - Integrated Silicon Solution, Inc

IS43DR16640C Scheda tecnica(HTML) 18 Page - Integrated Silicon Solution, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49

Scheda tecnica Scarica

Link URL