DATA BULLETIN MX623 • MX•COM MiXed Signal CMOS • Custom Tone Decoder (13 Call-Progress Frequencies Recognized) • Operates to a 3.579545MHz Telephone System Clock • Operates Under Simple Logic or µProcessor System Control Line-Powered Call Progress Tone Detector PRELIMINARY INFORMATION • Measures Call Progress Tone Frequencies (‘Busy’, ‘Dial’, ‘Fax-Tone

DATA BULLETIN MX633 Features • • • • • • • • Worldwide Tone Compatibility Single and Dual Tones Detected U.S. Busy-Detect Output Voice-Detect Output Wide Dynamic Range > 40dBm Low Supply Current (0.3mA/0.5mA) Low Supply Voltage (3.3V/5.0V) Standard 3.58MHz Xtal Call Progress Tone Detector PRELIMINARY INFORMATION Applications • Automatic Calling Products XT

19-0824; Rev 2; 3/96 True RMS-to-DC Converters General Description The MX536A and MX636 are true RMS-to-DC converters. They feature low power and are designed to accept low-level input signals from 0 to 7VRMS for the MX536A and 0 to 200mVRMS for the MX636. Both devices accept complex input waveforms containing AC and DC components. They can be operated from either a single sup

MX66C1024 5V Low Power CMOS SRAM 128 x 8 Bit n FEATURES • Vcc operation voltage : 5V • Low power consumption : 45mA (Max.) write current 2mA (Max.) read current 0.6uA (Typ.) CMOS standby current • High speed access time : -70 70ns (Max.) -10 100ns (Max.) • Input levels are CMOS-compatible • Automatic power down when chip is deselected • Three state outputs • Fully

MX66C256 Very Low Power 32k x 8 CMOS SRAM FEATURES Vcc operation voltage : 5.0V Very low power consumption : 50 mA (Max.) write current 40 mA (Max.) read current 0.4uA (Typ.) CMOS standby current High speed access time : - 70 70ns (Max.) - 100 100ns (Max.) Input levels are CMOS-compatible Automatic power down when chip is deselected Three state outputs Fully static operation Da