The Intersil HC55140IM is a Subscriber Line Interface Concept (SLIC) IC designed for telecom applications. It operates within a voltage range of 4.75V to 5.25V.
The Intersil HC55185AIM is a Subscriber Line Interface Concept (SLIC) IC designed for telecom applications. It operates within a temperature range of -40°C to 85°C.
The Intersil HC55181DIM is a Subscriber Line Interface Concept (SLIC) with 2-4 wire conversion capabilities. It operates within a voltage range of -16V to -100V and 4.75V to 5.25V.