U4090B Monolithic Integrated Feature Phone Circuit Description The µc controlled telephone circuit U4090B is a linear integrated circuit for use in feature phones, answering machines and fax machines. It contains the speech circuit, tone r

TELEFUNKEN Semiconductors U209B3/ U209B3–FP Phase Control Circuit – Tacho Applications Description: The integrated circuit U209B3, is designed as a phase control circuit in bipolar technology. It has also protection circuit for the su

TELEFUNKEN Semiconductors U209B3/ U209B3–FP Phase Control Circuit – Tacho Applications Description: The integrated circuit U209B3, is designed as a phase control circuit in bipolar technology. It has also protection circuit for the su