Features: ` An electronic circuit replaces the microphone hybrid transformer` Symmetrical input for dynamic or piezo microphone`High performance through the use of dynamic transducers as the earphone (non-linear distortion 2%)` Automatic line loss compensation` DTMF interface with muting` Supply ...
U4055B1: Features: ` An electronic circuit replaces the microphone hybrid transformer` Symmetrical input for dynamic or piezo microphone`High performance through the use of dynamic transducers as the earphon...
SeekIC Buyer Protection PLUS - newly updated for 2013!
268 Transactions
All payment methods are secure and covered by SeekIC Buyer Protection PLUS.
` An electronic circuit replaces the microphone hybrid transformer
` Symmetrical input for dynamic or piezo microphone
`High performance through the use of dynamic transducers as the earphone (non-linear distortion 2%)
` Automatic line loss compensation
` DTMF interface with muting
` Supply voltage for dialer
` High range of line feeding current
` Input resistance independent of line current and sidetone suppression circuit.
` Built-in ear protection by earphone voltage limiter
` Operation possible from 8 mA
Parameters |
Symbol |
Value |
Unit |
Line current |
IL |
200 |
mA |
DC line voltage, tp = 3 ms Pin 13 |
VL |
20 |
V |
Power dissipation, IL = 100 mA |
Ptot |
560 |
mW |
Junction temperature |
Tj |
150 |
|
Ambient temperature |
Tamb |
28 to +80 |
|
Storage temperature |
Tstg |
55 to +150 |
The U4055B electronic speech circuit is a linear integrated circuit for use in telephone and other line fed terminal equipment. It replaces the common speech circuit with carbon microphone, hybrid transformer, sidetone equivalent and ear protection rectifiers. A low-cost electrodynamic transducer is used as the earphone. U4055B contains all components necessary for amplification of signals and adaption to the line.