Features: ` Slope of DC characteristics adjustable by an external resistor` Gain of transmit and receive amplifiers automatically adjusted by line length control` Regulation range adjustable by the serial bus` Possibility of fixed gain (PABX)` Sidetone balancing system adjustable with line length ...
U3810BM: Features: ` Slope of DC characteristics adjustable by an external resistor` Gain of transmit and receive amplifiers automatically adjusted by line length control` Regulation range adjustable by the ...
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Parameters |
Symbol |
Value |
Unit |
DC calling voltage (pin 2) |
VRI |
35 |
V |
DC calling current (pin 2) |
IR |
30 |
mA |
Conversation line voltage (pin 10) |
VL |
15 |
V |
17 |
V pulse 20 ms | ||
Conversation line current |
IL |
150 |
mA |
Total power dissipation *) |
Ptot |
1 |
W |
Operating temperature range |
Tamb |
25 to +55 |
°C |
Storage temperature |
Tstg |
55 to +150 |
°C |
Junction temperature |
Tj |
125 |
°C |
The U3810BM multi-standard feature phone circuit isdesigned to be used with a microcontroller using a 2-wire serial bus. U3810BM performs all speech and line interface functions required in an electronic telephone set: the ringing function with switching regulator and melody generator, the DTMF dialling, the loudhearing with antilarsen and antidistortion systems, a power supply, a clock and a reset for the microcontroller. Transmit, receive and loudhearing gains control / AGC range / DTMF frequencies, pre-emphasis and level / melody generator, and mutes are programmable through the serial bus.