STC2560C

The STC2560C pulse dialer is a CMOS IC that converts pysh-button inputs to a series of pulses suitable for telephone dialing.It requires no independent external power supply but can be driven on the power supplied from telephone lines.It has two output terminals: one for the transmission of dial pulses and the other for providing signals to mute the receiver during the dial pulsing.

Features of the STC2560C are:(1)directly operation from the telephone lines; (2)low power CMOS process; (3)inexpensive RC oscillator built-in; (4)Mark/space ratio selectable; (5)dial rate selectable; (6)20-digit memory for redial by "#"key.

The absolute maximum ratings of the STC2560C can be summarized as:(1): supply voltage(VDD) is -0.3 V to 5.0 V; (2): operating temperature(Topr) is -30 to 70; (3): storage temperature(Tstg) is -55 to +125; (4): input voltage(Vi) is Vss-0.3 V to VDD+0.3 V.