UTC1062
LOW VOLTAGE TELEPHONE
TRANSMISSION CIRCUIT
WITH DIALLER INTERFACE
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
The UTC1062 is a bipolar integrated circuit per-
forming all speech and line interface function required
in the fully electronic telephone sets. It performs
electronic switching between dialing speech. The
circuit is able to operate down to d.c. line voltage of
1.6v (with reduced performance) to facilitate the use
of more telephone sets in parallel.
DIP-16
FEATURES
* Low d.c. line voltage; operates down to 1.6V
(excluding polarity guard)
* Voltage regulator with adjustment static resistance
* Provides supply with limited current for external
circuitry
* Symmetrical high-impedance inputs (64kΩ f or
dynamic, magnetic or piezoelectric microphones
* Asymmetrical high-impedance inputs (32kΩ for
electric microphones
* DTMF signal input with confidence tone
* Mute input for pulse or DTMF dialing
SOP-16
* Receiving amplifier for several types of earphones
* Large amplification setting range on microphone
and ear piece amplifiers
* Line loss compensation facility , line current
dependent (microphone and ear piece amplifiers)
* Gain control adaptable to exchange supply
* Possibility to adjust the d.c. line voltage
QUICK REFERENCE DATA
Line voltage at I
line
=15mA
Line current operating range[pin1]
normal operation
with reduced performance
Internal supply current
Supply current for peripherals
at I
line
=15 mA mute input HIGH
Vcc>2.2V
Vcc>2.8V
Voltage amplification range
microphone amplifier
receiving amplifier
Line loss compensation
Amplification control range
Exchange supply voltage range
Exchange feeding bridge resistance range
Operating ambient temperature range
V
LN
I
line
I
line
I
CC
typ.
3.8 V
11 to 140 mA
1 to 11 mA
1mA
YOUWANG ELECTRONICS CO.LTD
)
)
typ.
I
p
I
p
A
VD
A
VD
A
VD
V
exch
R
exch
T
amb
typ.
typ.
1.8mA
0.7mA
44 to 52 dB
20 to 39 dB
Typ.
6 dB
36 to 60V
400 to 1000Ω
-25 to +75
°C
1
UTC-IC [ UNISONIC TECHNOLOGIES ]
