HM5425161B Datasheet, PDF(53/65 Page) Elpida Memory – 256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword × 16-bit × 4-bank/8-Mword × 8-bit × 4-bank/ 16-Mword × 4-bit × 4-bank

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HM5425161B Datasheet, PDF (53/65 Pages) Elpida Memory – 256M SSTL_2 interface DDR SDRAM 143 MHz/133 MHz/125 MHz/100 MHz 4-Mword × 16-bit × 4-bank/8-Mword × 8-bit × 4-bank/ 16-Mword × 4-bit × 4-bank

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HM5425161B, HM5425801B, HM5425401B Series

Test Conditions

Parameter

Symbol

Input reference voltage

VREF(AC)

Termination voltage

VTT (AC)

AC input high voltage

VIH (AC)

AC input low voltage

VIL (AC)

AC differential input voltage (CLK, VID (AC)

CLK)

AC differential cross point voltage VX (AC)

(CLK, CLK)

Input signal slew rate

SLEW

Min

0.5ÃVCCQâ0.05

VREF(AC) â 0.04

VREF (AC) + 0.31

0.7

0.5 Ã VCCQ â 0.2

Typ

0.5 Ã VCCQ

VREF(AC)

0.5 Ã VCCQ

Max

Unit

0.5ÃVCCQ+0.05 V

VREF (AC) + 0.04 V

VREF (AC) â 0.31 V

VCCQ + 0.6

0.5 Ã VCCQ + 0.2 V

V/ns

CLK

VID(AC)

CLK

tCK

tCL

tCH

VCC

VX(ACV)REF (AC)

VSS

VCC

VIL

VIH

VREF

VSS

ât

SLEW = (VIH (AC) â VIL (AC))/ât

VTT

Measurement point

RT = 50 â¦

CL = 30 pF

Data Sheet E0086H20

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