EDD2504AKTA-6B-E datasheet(8/49 Pages) ELPIDA

Part #	EDD2504AKTA-6B-E

Description	256M bits DDR SDRAM (64M words x 4 bits)

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Manufacturer	ELPIDA [Elpida Memory]

Direct Link	http://www.elpida.com/en

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EDD2504AKTA-E

Data Sheet E0610E10 (Ver. 1.0)

8

13. tDAL = (tWR/tCK)+(tRP/tCK)

For each of the terms above, if not already an integer, round to the next highest integer.

Example: For –7A Speed at CL = 2.5, tCK = 7.5ns, tWR = 15ns and tRP= 20ns,

tDAL = (15ns/7.5ns) + (20ns/7.5ns) = (2) + (3)

tDAL = 5 clocks

Test Conditions

Parameter

Symbol

Value

Unit

Input reference voltage

VREF

VDDQ/2

V

Termination voltage

VTT

VREF

V

Input high voltage

VIH (AC)

VREF

+ 0.31

V

Input low voltage

VIL (AC)

VREF

− 0.31

V

Input differential voltage, CK and /CK

inputs

VID (AC)

0.62

V

Input differential cross point voltage,

CK and /CK inputs

VIX (AC)

VREF

V

Input signal slew rate

SLEW

1

V/ns

VTT

VREF

/CK

CK

VREF

VSS

SLEW = (VIH (AC) – VIL (AC))/

∆t

Measurement point

VIH

VIL

VDD

VSS

DQ

RT = 50

Ω

CL = 30pF

VIX

∆t

tCL

tCK

tCH

VID

Input Waveforms and Output Load

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EDD2504AKTA-6B-E Datasheet(PDF) 8 Page - Elpida Memory

EDD2504AKTA-6B-E Datasheet(HTML) 8 Page - Elpida Memory

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