Semiconductor device having impedance calibration function to data output buffer and semiconductor module having the same

摘要

Disclosed herein is a semiconductor device that includes a first transistor unit coupled to the data terminal, and a plurality of second transistor units coupled to the calibration terminal. The first transistor unit includes a plurality of first transistors having a first conductivity type connected in parallel to each other so that an impedance of the first transistor unit is adjustable. Each of the second transistor units includes a plurality of second transistors having the first conductivity type connected in parallel to each other so that an impedance of each of the second transistor units is adjustable. The semiconductor device further includes an impedance control circuit that reflects the impedance of each of the second transistor units to the first transistor unit.

主权项

1. A semiconductor device comprising:
a data terminal; a calibration terminal; a first transistor unit coupled to the data terminal, the first transistor unit including a plurality of first transistors having a first conductivity type connected in parallel to each other so that an impedance of the first transistor unit is adjustable; a plurality of second transistor units coupled to the calibration terminal, each of the second transistor units including a plurality of second transistors having the first conductivity type connected in parallel to each other so that an impedance of each of the second transistor units is adjustable using an impedance code; and an impedance control circuit reflecting the impedance of each of the second transistor units to the first transistor unit.