TP5088

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Supply Voltage (V_DD-V_SS) ................12V
MUTE Voltage ......................12V
Maximum Voltage at
Any Other Pin............ V_DD +0.3V to V_SS - 0.3V
Operating Temperature, T_A......... -30°C to +70°C
Storage Temperature.......... -55°C to +150°C
Maximum Power Dissipation............ 500 mW

This CMOS TP5088 device provides low cost tone-dialing capability in microprocessor-controlled telephone applications. 4-bit binary data of TP5088 is decoded directly, without the need for conversion to simulated keyboard inputs required by standard DTMF generators. With the TONE ENABLE input low, the oscillator is inhibited and the device is in a low power idle mode. On the low-to-high transition of TONE ENABLE, data is latched into the device and the selected tone pair from the standard DTMF frequencies is generated. An open-drain N-channel transistor provides a MUTE output during tone generation.