U4078B
TELEFUNKEN Semiconductors
15
25
a
10 F
Tone ringing
Figure 1
2 kV
110
0.22 F
b
93 7575 e
Figure 2
Absolute Maximum Ratings
Reference point Pin 7, unless otherwise specified
Parameters
Symbol
Value
50
Unit
mA
°C
Supply current
Pin 1, 8
I
s
Ambient temperature range
T
amb
–10 to + 60
Storage temperature range
Tstg
–40 to + 125
°C
Power dissipation
Tamb = 60°C
Junction temperature
360
125
mW
Ptot
Tj
°C
Thermal Resistance
Parameters
Symbol
RthJA
Value
180
Unit
K/W
Junction ambient
Electrical Characteristics
Reference point Pin 7, T
= –10 to + 60°C, V = 15 V, unless otherwise specified
B
amb
Parameters
Test Conditions / Pin
fosc = 65 to 87 kHz
Symbol
Min
Typ
420
12.5
Max
500
15
Unit
µA
V
Supply current
Is
Pin 1, 8
Threshold voltage for
slope identification
Audio impedance
Pin 3 open
10
200
26
VTH
R
f = 300 to 3400 Hz
V1,8 = 1 5 Vrms
kΩ
V
Internal voltage limitation
Leakage current
30
32
Vz
Iz = 1 mA
100
150
1. phase
2. phase
Pin 5
i5
i5
µΑ
µΑ
7
10
38
1
13
Base current (PNP open)
Oscillator frequency range
Duty-cycle
Pin 5
Pin 6
Pin 6
IB(5)
fosc
µA
kHz
32.5
0.67
48.5
32/f
Interrupted (pause) time
of the output signal
clock
3
TEMIC [ TEMIC SEMICONDUCTORS ]
