EDE5108AESK datasheet(9/65 Pages) ELPIDA

Part #	EDE5108AESK

Description	512M bits DDR2 SDRAM

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Manufacturer	ELPIDA [Elpida Memory]

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EDE5104AESK, EDE5108AESK

Data Sheet E0562E50 (Ver. 5.0)

9

DC Characteristics 2 (TC = 0

°C to +85°C, VDD, VDDQ = 1.8V ± 0.1V)

Parameter

Symbol

Value

Unit

Notes

Input leakage current

ILI

2

µA

VDD

≥ VIN ≥ VSS

Output leakage current

ILO

5

µA

VDDQ

≥ VOUT ≥ VSS

Minimum required output pull-up under AC

test load

VOH

VTT + 0.603

V

5

Maximum required output pull-down under

AC test load

VOL

VTT

− 0.603

V

5

Output timing measurement reference level VOTR

0.5

× VDDQ

V

1

Output minimum sink DC current

IOL

+13.4

mA

3, 4, 5

Output minimum source DC current

IOH

−13.4

mA

2, 4, 5

Notes: 1. The VDDQ of the device under test is referenced.

2. VDDQ = 1.7V; VOUT = 1.42V.

3. VDDQ = 1.7V; VOUT = 0.28V.

4. The DC value of VREF applied to the receiving device is expected to be set to VTT.

5. After OCD calibration to 18

Ω at TC = 25°C, VDD = VDDQ = 1.8V.

DC Characteristics 3 (TC = 0

°C to +85°C, VDD, VDDQ = 1.8V ± 0.1V)

Parameter

Symbol

min.

max.

Unit

Notes

AC differential input voltage

VID (AC)

0.5

VDDQ

+ 0.6

V

1, 2

AC differential cross point voltage

VIX (AC)

0.5

× VDDQ − 0.175

0.5

× VDDQ + 0.175

V

2

AC differential cross point voltage

VOX (AC)

0.5

× VDDQ − 0.125

0.5

× VDDQ + 0.125

V

3

Notes: 1. VID(AC) specifies the input differential voltage |VTR -VCP| required for switching, where VTR is the true

input signal (such as CK, DQS) and VCP is the complementary input signal (such as /CK, /DQS). The

minimum value is equal to VIH(AC)

− VIL(AC).

2. The typical value of VIX(AC) is expected to be about 0.5

× VDDQ of the transmitting device and VIX(AC)

is expected to track variations in VDDQ . VIX(AC) indicates the voltage at which differential input signals

must cross.

3. The typical value of VOX(AC) is expected to be about 0.5

× VDDQ of the transmitting device and

VOX(AC) is expected to track variations in VDDQ . VOX(AC) indicates the voltage at which differential

output signals must cross.

Crossing point

VSSQ

VTR

VCP

VID

VIX or VOX

VDDQ

Differential Signal Levels*

1, 2

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