EDE5108GBSA datasheet(5/56 Pages) ELPIDA

Part #	EDE5108GBSA

Description	512M bits DDR-II SDRAM

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Manufacturer	ELPIDA [Elpida Memory]

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EDE5104GBSA, EDE5108GBSA, EDE5116GBSA

Preliminary Data Sheet E0249E30 (Ver. 3.0)

5

Electrical Specifications

• All voltages are referenced to VSS (GND)

• Execute power-up and Initialization sequence before proper device operation is achieved.

Absolute Maximum Ratings

Parameter

Symbol

Rating

Unit

Note

Power supply voltage

VDD

–0.5 to +2.3

V

1

Power supply voltage for output

VDDQ

–0.5 to +2.3

V

1

Input voltage

VIN

–0.5 to +2.3

V

1

Output voltage

VOUT

–0.5 to +2.3

V

1

Operating temperature (ambient)

TA

0 to +70

°C

1

Storage temperature

TSTG

–55 to +150

°C

1

Power dissipation

PD

1.0

W

1

Short circuit output current

IOUT

50

mA

1

Note: 1. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to

the device.

This is a stress rating only and functional operation of the device at these or any other

conditions above those indicated in the operational sections of this specification is not implied. Exposure

to absolute maximum rating conditions for extended periods may affect reliability.

Caution

Exposing the device to stress above those listed in Absolute Maximum Ratings could cause

permanent damage.

The device is not meant to be operated under conditions outside the limits

described in the operational section of this specification.

Exposure to Absolute Maximum Rating

conditions for extended periods may affect device reliability.

Recommended DC Operating Conditions (SSTL_18)

• There is no specific device VDD supply voltage requirement for SSTL_18 compliance. However under all

conditions VDDQ must be less than or equal to VDD.

Parameter

Symbol

min.

Typ.

max.

Unit

Notes

Supply voltage

VDD

1.7

1.8

1.9

V

4

Supply voltage for output

VDDQ

1.7

1.8

1.9

V

4

Input reference voltage

VREF

0.49

× VDDQ

0.50

× VDDQ 0.51 × VDDQ

V

1, 2

Termination voltage

VTT

VREF – 0.04

VREF

VREF + 0.04

V

3

DC input logic high

VIH (dc)

VREF + 0.125



VDDQ + 0.3V

V

DC input low

VIL (dc)

–0.3



VREF – 0.125

V

AC input logic high

VIH (ac)

VREF + 0.250



V

AC input low

VIL (ac)



VREF – 0.250

V

Notes: 1. The value of VREF may be selected by the user to provide optimum noise margin in the system. Typically

the value of VREF is expected to be about 0.5

× VDDQ of the transmitting device and VREF are expected

to track variations in VDDQ.

2. Peak to peak AC noise on VREF may not exceed

±2% VREF (dc).

3. VTT of transmitting device must track VREF of receiving device.

4. VDDQ tracks with VDD, VDDL tracks with VDD. AC parameters are measured with VDD, VDDQ and

VDDL tied together.

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