SEMICONDUCTOR DEVICE AND SEMICONDUCTOR MODULE HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To perform an accurate impedance calibration operation of a data output buffer.

SOLUTION: A semiconductor device includes: a P type transistor unit 201 connected between a power line VL1 and a data terminal 24; P type transistor units 111-114 connected between the power line VL1 and a calibration terminal ZQ; and an impedance control circuit for adjusting impedances of the P type transistor units 111-114 such that a potential of the calibration terminal ZQ matches a reference potential VREF, and reflecting the impedance of one of the P type transistor units 111-114 in the matching state in the P type transistor unit 201. This can provide an accurate calibration operation even if the reference potential VREF is set at a level offset from half the level of a supply potential VDD.

COPYRIGHT: (C)2013,JPO&INPIT