6

PS8545 06/20/01

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PI6CV855

PLL Clock Driver for 2.5V

SSTL 2 DDR SDRAM Memory

Figure2.OutputLoadTestCircuit

Figure1.IBISModelOutputLoad

–VDDQ/2

VDDQ/2

–VDDQ/2

–VDDQ/2

C=14pF

R =10

Ω

Z = 60

Ω

Z = 50

Ω

Z = 50

Ω

Z = 60

Ω

C=14pF

R =10

Ω

SCOPE

R = 50

Ω

R = 50

Ω

VDD

Z = 60

Ω

Z = 60

Ω

R =120

Ω

DDR

SDRAM

DDR

SDRAM