EDE5104GBSA Ver la hoja de datos (PDF) - Elpida Memory, Inc

Número de pieza

componentes Descripción

Fabricante

EDE5104GBSA

512M bits DDR-II SDRAM

Elpida Memory, Inc 

EDE5104GBSA, EDE5108GBSA, EDE5116GBSA

AC Electrical Characteristics and Operating Conditions

Parameter

Symbol

min

max

Unit Notes

ODT turn-on delay

tAOND

2

2

tCK

ODT turn-on

tAON

tAC(min)

tAC(max) + 1000

ps 1

ODT turn-on (power - down mode)

tAONPD

tAC(min) + 2000 2tCK + tAC(max) + 1000

ps

ODT turn-off delay

tAOFD

2.5

2.5

tCK

ODT turn-off

tAOF

tAC(min)

tAC(max) + 600

ps 2

ODT turn-off (power - down mode)

tAOFPD

tAC(min) + 2000 2.5tCK + tAC(max) + 1000

ns

Notes: 1. ODT turn on time min is when the device leaves high impedance and ODT resistance begins to turn on.

ODT turn on time max is when the ODT resistance is fully on. Both are measured from tAOND.

2. ODT turn off time min is when the device starts to turn off ODT resistance.

ODT turn off time max is when the bus is in high impedance. Both are measured from tAOFD.

Test Conditions

CLK

VSWING

/CLK

tCK

tCL

tCH

VDD

VREF

VX

VSS

VDD

VIH

VREF

VIL

VSS

∆t

SLEW = (VIH (ac) – VIL (ac))/∆t

Measurement point

DQ

VTT

RT =25 Ω

Preliminary Data Sheet E0249E30 (Ver. 3.0)

9

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