K4T56043QF datasheet(19/27 Pages) SAMSUNG

Part #	K4T56043QF

Description	256Mb F-die DDR2 SDRAM

Download	27 Pages

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Manufacturer	SAMSUNG [Samsung semiconductor]

Direct Link	http://www.samsung.com/Products/Semiconductor

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Page 19 of 27

256Mb F-die DDR2 SDRAM

Rev. 1.5 Feb. 2005

DDR2 SDRAM

Parameter

Symbol

DDR2-667

DDR2-533

DDR2-400

Units

Notes

min

max

min

max

min

max

Exit active power down

to read command

(slow exit, lower

power)

tXARDS

7 - AL

6 - AL

tCK

9, 10

CKE minimum pulse

width

(high and low pulse

width)

tCKE

3

33

tCK

36

ODT turn-on delay

tAOND

22

2

tCK

ODT turn-on

tAON

tAC(mi

n)

tAC(m

ax)+0.

7

tAC(mi

n)

tAC(m

ax)+1

tAC(mi

n)

tAC(ma

x)+1

ns

13, 25

ODT turn-on(Power-

Down mode)

tAONPD

tAC(mi

n)+2

2tCK+t

AC(ma

x)+1

tAC(mi

n)+2

2tCK+t

AC(ma

x)+1

tAC(mi

n)+2

2tCK+t

AC

(max)+

1

ns

ODT turn-off delay

tAOFD

2.5

tCK

ODT turn-off

tAOF

tAC(mi

n)

tAC(m

ax)+

0.6

tAC(min)

tAC(ma

x)+ 0.6

tAC(mi

n)

tAC(max

)+ 0.6

ns

26

ODT turn-off (Power-

Down mode)

tAOFPD

tAC(mi

n)+2

2.5tCK

+tAC(

max)+

1

tAC(mi

n)+2

2.5tCK

+

tAC(m

ax)+1

tAC(mi

n)+2

2.5tCK

+

tAC(ma

x)+1

ns

ODT to power down

entry latency

tANPD

3

tCK

ODT power down exit

latency

tAXPD

8

tCK

OCD drive mode

output delay

tOIT

0

12

0

12

0

12

ns

Minimum time clocks

remains ON after CKE

asynchronously drops

LOW

tDelay

tIS+tCK

+tIH

tIS+tCK

+tIH

tIS+tCK

+tIH

ns

24

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K4T56043QF Datasheet(PDF) 19 Page - Samsung semiconductor

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