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BL1062/BL1062A
Low voltage transmission circuits with dialer interface
GENERAL DESCRIPTION
The BL1062 and BL1062A are Bipolar integrated circuits that
perform all speech and line interface functions required in fully
electronic telephone sets. They perform electronic switching
between dialing and speech. The ICs operate at line voltage
down to 1.6V DC to facilitate the use of more telephone sets
connected in parallel.
16
FEATURES
Low DC line voltage; operates down to 1.6V
Voltage regulator with adjustable static resistance
Provides a supply for external circuits
Symmetrical hign-impedance input(64k )for dynamic, magnetic or piezoelectric microphones
Asymmetrical hign-impedance input(32 )for electret microphones
DTMF signal input with confidence tone
Mute input for pulse or DTMF dialing
BL1062: active HIGN (MUTE)
BL1062A: active LOW ( MUTE )
Receiving amplifier for dynamic, magnetic or piezoelectric earpieces
Large gain setting ranges by external resistance on receiving and transition amplifiers
Line loss compensation (line current dependent) for microphone and earpiece amplifiers
Compatible with TEA1062/1062A
Process with 3um Bipolar technics
PARAMETERS
LIMITING VALUES
Positive continuous line voltage Vln
12V
Repetitive line voltage during switch-on
or line interruption Vln(r)
13.2V
Repetive peak line voltage for a 1 ms
pulse per 5 s Vln(rm)
28V
Line current Iline
140mA
Input voltage on all other pins Vi
-0.7 Vcc+0.7V
Total power dissipation Ptot
666mW
Storage temperature Tstg
-40 +125
Operating ambient temperature Tamb
-25 +75
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