S2559E

The S2559E is designed as a DTMF generator specifically to implement a dual tone telephone dialing system. The device can interface directly to a standard pushbutton.

S2559E has ten features. (1)Wide operating supply voltage range which would be 2.5V to 10V. (2)Low power CMOS circuitry allows device power to be derived directly from the telephone lines or from small batteries, 9V. (3)Uses TV crystal standard 3.58MHz to derive all frequencies thus providing bery high accuracy and stability. (4)Mute drivers on-chip. (5)Interfaces directly to a standard telephone push-button or calculator type X-Y beyboard. (6)The total harmonic distortion is below undustry specification. (7)Its oscillator resistor on chip. (8)On-chip generation of a reference voltage to assure amplitude stability of the dual tones over the operating voltage and temerature range. (9)Single tone as well as dual tone capability. (10)Mode select. Those are all the main features.

Some absolute maximum ratings of S2559E have been concluded into several points as follow. (1)Its DC supply voltage Vdd-Vss would be 10.5V. (2)Its operating temperature range would be from 0°C to 70°C commerical and -45°C to 85°C industrial. (3)Its storage temperature range would be from -30°C to 125°C. (4)Its power dissipation would be 25°C. (5)Its input voltage would be from Vss-0.3V to Vdd+0.3V. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to S2559E.

Also some electrical characteristics of S2559E are concluded as follow. (1)Its supply voltage would be min 2.5V and max 10V for tone out mode (valid key depressed) and min 1.6V and max 10V for non-tone out mode (no key depressed). (2)Its supply current would be typ 0.3uA and max 30uA at Vdd-Vss=3V and would be typ 1uA and max 100uA at Vdd-Vss=10V. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!