This part is a kind of semiconductor called SC9102.

Function of this product has T/P SWITCHABLE DIALER WITH REDIA FUNCTION.

Manufacturers : SL

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Some of the text within the PDF file :

SC9102C/D T/P SWITCHABLE DIALER WITH REDIA FUNCTION DESCRIPTION The SC9102C/D are Tone/Pulse switchable dialer which are fabricated in COMS technology with wide operating voltage for both tone and pulse mode, and consumes very low memory retention current in on hook state. FEATURES * Tone/Pulse switchable dialer * One 32-digit last number redial memory * Pulse-to-tone (P→T) is provided for PBX operation * Flash key is available * Minimum tone duration is 100ms * Minimum intertone pause is 106ms * Uses 3.579549MHz crystal or ceramic resonator * Redial Pause time (0ms) * Mixed dialing * Power on reset circuit is provided * Many options can be selected Mode (10PPS; 20PPS; Tone) M/B ratio (40:60;33:66) Pause time (3.6ms) * Flash function (RESET) (P→T) pause time (3.6ms) Flash time (600/ [ ... ]

SC9102 PDF Datasheet Download