GENERAL DESCRIPTION
The NJM2105 is a Telephone Speech Network IC produced in a 9-pin single-in-line package which complies with foreign regulations such as FCC and DOC rules.
The IC incorporates adjustable transmit, receive and sidetone functions, a DC loop interface circuit, tone dialer interface and a regulated output voltage for a pulse/tone dialer. Also include is a gain control circuit to keep constant transmition/reception levels under loop current variations.