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MFG:ROHM  Package Cooled:DIP  

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Part Number: BU8877

 

MFG: ROHM

Package Cooled: DIP

 

Description: The BU8877 and BU8877F are ICs that detect dial tones from a call progress signal used in the telephone lines.&nb...


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BU8877 General 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).

BU8877 Maximum Ratings

Parameter Symbol Limits Unit
Power supply voltage  VCC  7  V 
 Power
dissipation		  DIP8  Pd  800 *1  mW
 SOP16  300 *2
 Operating temperature range  Topr  -30 ~ +80  
 Storage temperature range  Tstg  -55 ~ +125  

*1 Derating:8.0mW/ for operation above Ta=25
*2 Derating:3.0mW/ for operation above Ta=25

BU8877 Features

1) No malfunction by voice signal
2) Dual tone detection (350Hz and 440Hz)
3) Wide dynamic range
4) 3.58MHz crystal resonator

BU8877 Typical Application

Telephone, Codeless telephone and Facsimile for the U.S.

BU8877 datasheet

bu8877
PDF/DataSheet Download

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