Memory chip and off-chip driver

Abstract

A memory chip and an off-chip driver (OCD). The OCD includes an output driver and a bulk selector. The output driver comprises a first transistor and configured to output a memory data to a signal pad. The bulk selector is coupled to a bulk terminal of the first transistor. The bulk selector is configured to: provide a first bulk voltage to the bulk terminal of the first transistor according to an enable signal; and provide a second bulk voltage to the bulk terminal of the first transistor according to the enable signal. The first transistor has a first threshold voltage when the first bulk voltage is provided, and the first transistor has a second threshold voltage when the second bulk voltage is provided. An absolute value of the second threshold voltage is greater than an absolute value of the first threshold voltage.

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