TP5088 Datasheet | National Semiconductor

Description This CMOS device provides low cost tone-dialing capability in microprocessor-controlled telephone applications 4-bit binary data 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 Features Y Y Y Y Y Y Y Y Y Y Direct microprocessor interface Binary data inputs with latches Generates 16 standard tone pairs On-chip 3 579545 MHz crystal-controlled oscillator Better than 0 64% frequency accuracy High group pre-emphasis Low harmonic distortion MUTE output interfaces to speech network Low power idle mode 3 5V - 8V operation Block Diagram TL H 5004 - 1 Crystal Specification Parallel Resonant 3 579545 MHz RS s 150X L e 100 m H C0 e 5 p F C1 e 0 02 p F C1995 National Semiconductor Corporation TL H 5004 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage (VDDb VSS) MUTE Voltage Maximum Voltage at Any Other Pin 12V 12V VDD a 0 3V to VSS b 0 3V Operating Temperature TA Storage Temperature Maximum Power Dissipation b 30 C to a 70 C b 55 C to a 150 C 500 m W Electrical Characteristics Unless otherwise noted limits printed in BOLD characters are guaranteed for VDD e 3 5V to 8V TA e 0 C to a 70 C by correlation with 100% electrical testing at TA e 25 C All other limits are assured by correlation with other production tests and or product design and characterization Parameter Minimum Supply Voltage VDD (min) Minimum Supply Voltage for Data Input TONE ENABLE and MUTE Logic Functions Operating Current...