BT1062A Kodenshi Korea Corp., BT1062A Datasheet - Page 4

• Manufacturer Part Number: BT1062A
• Description: Telephone Speech Network With Dialer Int`erface
• Manufacturer: Kodenshi Korea Corp.

Positive Continuous Line Voltage
Repetitive Line Voltage During Switch-on
or Line Interruption
Repetitive Peak Line Voltage for a 1ms
Pulse per 5s
Line Current
Input Voltage on all other Pins
Total Power
Dissipation
Operating Ambient Temperature
Storage Temperature
Junction Temperature
Automatic line loss compensation is achieved by connecting a
resistor (R6) between AGC and V
The automatic gain control varies the gain of the microphone
amplifier and the receiving amplifier in accordance with the DC line
current. The control range is 5.8 dB which corresponds to a line
length of 5 km for a
0.5mm diameter twisted-pair copper cable with a DC resistance of
176 " /km and average attenuation of
1.2dB/km. Resistor R6 should be chosen in accordance with the
exchange supply voltage and its feeding bridge resistance. The ratio
of start and stop currents of the AGC curve is independent of the
value of R6. If no automatic
line-loss compensation is required the AGC pin may be left open-
circuit. The amplifiers, in this condition, will give their maximum
specified gain.
Sidetone suppression
The anti-sidetone network, R1//Z
suppresses the transmitted signal in the earpiece. Maximum
compensation is obtained when the following conditions are fulfilled:
R9 x R2 = R1 x R 3
ABSOLUTE MAXIMUM RATING
Notes
1. Mostly dependent on the maximum required T
2. Calculated for the maximum ambient temperature specified and a maximum junction temperature of 125
(1)
(2) T
(3) T
(4) T
(Thermal Resistance R
T
A
A
A
A
= 55
= 65
= 75
= 45
o
o
o
C; P
C; P
C; P
Characteristic
o
C; P
tot
tot
tot
Standard DIP
DIP with heatsink
tot
= 0.82 W
= 0.71 W
= 0.58 W

= 0.94 W
§
¨
©
JA
R 8
R 8
= 85
Fig.3a Safe operating area
x

o
C/W for standard DIP and R
Z
line
EE
Z
(Standard DIP)
bal
bal
, R2, R3, R8, R9 and Z
.
·
¸
¹
I
LN
(mA)
150
130
110
90
70
30
50
2
A
Symbol
V
and on the voltage between LN and SLPE.
V
4
(1)
V
LN(RM)
T
I
P
T
LN(R)
V
T
line
LN
tot
stg
A
I
j
6
bal
JA
V
= 75
8
LN
- V
o
SLPE
C/W for special DIP with heatsink).
10
(1)
(2)
(V)
(3)
R9 = 20 : ; R10 = 13 : ;
(4)
12
R9 = 20 : ; note 1
R9 = 20 : ; note 2
Test Condition
see Fig.6
(1)
(2) T
(3) T
(4) T
If fixed values are chosen for R1, R2, R3 and R9, then condition (1)
will always be fulfilled when
To obtain optimum sidetone suppression, condition (2) has to be
fulfilled which results in:
Z
Where k is scale factor; k =
The scale factor k, dependent on the value of R8, is chosen to meet
the following criteria:
- compatibility with a standard capacitor from the E6 or
- _ Z
- _ Z
In practise Z
value chosen for Z
giving optimum setting for short or long lines.
Z
E12 range for Z
bal
ensuring correct
anti-sidetone bridge operation
bal
bal
bal
Z
=
T
A
A
A

//R8 _ <<R8 fulfilling condition (a) and thus
bal
+ R8 _ >>R9 to avoid influencing the transmit gain.
A
Fig.3b Safe operating area
= 55
= 65
= 75
R 8
R 1
R 8
= 45
(DIP with HS)
o
o
o
C; P
C; P
C; P
x Z
=
line
o
C; P
Z
line
varies considerably with the line type and length. The
line
bal
tot
tot
tot
tot
Z
= k x Z
bal
= 0.93 W
= 0.80 W
= 0.67 W
line
= 1.07 W

should therefore be for an average line thus
R 1
line
o
C.
Min
-0.7
-25
-40
R 8
R 1
I
LN
KKA1062/1062A
(mA)
Typ
130
150
110
90
70
30
50
2
(2)
4
V
+125
+125
Max
CC
13.2
0.58
0.67
+75
140
12
28
+0.7
6
V
8
LN
- V
Unit
mA
W
o
o
o
V
V
V
V
C
C
C
SLPE
(1)
10
(2)
(3)
(V)
(4)
12