Test device for on die termination

Details Test device for on die termination Test device for on die termination

2008-01-08

2008-01-08

Le, Don (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S087000, C326S083000

Reexamination Certificate

active

07317328

ABSTRACT:
An on die termination (ODT) test device includes: a control unit for selectively activating a plurality of pull-up signals and a plurality of pull-down signals by performing a logic operation to an ODT control signal for controlling a resistor of a termination terminal, an off chip driver (OCD) control signal for adjusting an impedance of an output terminal, a plurality of ODT test signals for measuring a termination resistance of the termination terminal and a plurality of ODT signals having a different resistance; and a pull-up/pull-down unit for selectively driving a plurality of pull-up drivers and a plurality of pull-down drivers according to the pull-up signals and the pull-down signals in order to output a corresponding resistance of the output terminal at a read operation mode.

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