BU8877

www.DataSheet4U.com 99W121A Call Progress Tone Decoder for Telephone BU8877/F Description The BU8877 and BU8877F are ICs that detect dial tones from a call progress signal used in the telephone lines. The ICs detect dual signals 350Hz(from 345 to 355Hz)and 440Hz(from 435 to 445Hz). Dimension(Units:mm) BU8877 Features 1) No malfunction by voice signal 2) Dual tone detection (350Hz and 440Hz) 3) Wide dynamic range 4) 3.58MHz crystal resonator BU8877F DIP8 Applications Telephone, Codeless telephone and Facsimile for the U.S. SOP16 Absolute Maximum Ratings (Ta=25˚C) Parameter Power supply voltage Power dissipation DIP8 SOP16 Symbol VCC Pd Topr Tstg Limits 7 800 300 *1 *2 Unit V mW ˚C ˚C Operating temperature range Storage temperature range -30 ~ +80 -55 ~ +125 *1 Derating:8.0mW/˚C for operation above Ta=25˚C *2 Derating:3.0mW/˚C for operation above Ta=25˚C Recommended Operating Conditions (Ta=25˚C) Parameter Power supply voltage Symbol VDD Min. 2.85 Typ. Max. 5.25 Unit V December, 1999 Electrical characteristics Parameter Supply current operation 2-1 Minimum input signal level Maximum input signal level Must not detect signal level Must detect frequency range Input Impedance (Unless otherwise noted, Ta=25˚C, VDD= 5.0V, Xtal frequency=3.58MHz) Symbol IDD2-1 VRECL VRECH VREJ 350Hz 440Hz fV350 fV440 Zin Min. -38 -50 345 435 28 28 35 Typ. 3.7 350 440 100 50 Max. 5.0 2 355 445 56 56 65 Unit mA dBm dBm dBm Hz Hz kΩ ms ms % Conditions www.DataSheet4U.com ENABLE="H"(...