TEA1068T Philips Semiconductors, TEA1068T Datasheet - Page 17

• Manufacturer Part Number: TEA1068T
• Description: Versatile telephone transmission circuit with dialler interface
• Manufacturer: Philips Semiconductors

Philips Semiconductors
APPLICATION INFORMATION
1996 Apr 23
handbook, full pagewidth
telephone
Versatile telephone transmission circuit
with dialler interface
Typical application of the TEA1068, shown here with a piezoelectric earpiece and DTMF dialling. The bridge to the left and R10 limit the current into
the circuit and the voltage across the circuit during line transients. Pulse dialling or register recall require a different protection arrangement.
line
BZW14
BAS11
(2x)
(2x)
R10
13
Z bal
R3
130 k
R3
3.92
k
R4
100 nF
C7
100 pF
C5
390
R8
R11
C4
1 nF
Fig.16 Application diagram.
20
R9
IR
QR
QR
GAR
MIC
MIC
SLPE
100 pF
C6
LN
GAS1 GAS2
17
R7
TEA1068
REG
620
R1
C3
4.7 F
AGC
R6
STAB
V CC
R5
3.6 k
V EE
MUTE
DTMF
100 F
PD
Product specification
MBH140
C1
TEA1068
from dial
circuits
control
and