Patent ID: 7038486

Claim:
A semiconductor integrated circuit device, comprising: a plurality of sets of output circuits each of which varies an output impedance in accordance with a first impedance code; and a first impedance control circuit that generates the first impedance code in association with a first resistive element connected to an external terminal, comprising: a first impedance comparator having replica circuits with an impedence equivalent to at least the first resistive element, and which performs an impedance comparison with each of the replica circuits to form at least one of a first signal that increases the output impedance and a second signal that decreases the output impedance; and a first counter which increases a count value in response to the first signal and decreases the count value in response to the second signal to generate the impedance code, wherein a plurality of the first counters are each arranged substantially adjacent to individuals of the plurality of sets of output circuits, and wherein the first signal and the second signal formed by the first impedance comparator are supplied to the plurality of the first counters.