Semiconductor device for driving thermal print heads

摘要

A semiconductor device is used, for example, for controlling and driving thermal heads of a facsimile apparatus and includes a first circuit activated when power is supplied to the semiconductor device and a second circuit activated only when both power and a power control signal are applied to the semiconductor device. The semiconductor device further includes a power switch circuit which includes a semiconductor electronic circuit and which supplies power to the second circuit only when the power control signal is applied thereto.