BU8877 Call Progress Tone Decoder

BU8877 Call Progress Tone Decoder

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 4.

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) Pa.