TEA1067/C2 Philips Semiconductors (Acquired by NXP), TEA1067/C2 Datasheet - Page 19

• Manufacturer Part Number: TEA1067/C2
• Description: TEA1067; Low Voltage Versatile Telephone Transmission Circuit With Dialler Interface;; Package: SOT102-1 (DIP18), SOT163 (SO20)
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
APPLICATION INFORMATION
June 1990
handbook, full pagewidth
Low voltage versatile telephone
transmission circuit with dialler interface
telephone
The bridge to the left, the zener diode 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.
The DC line voltage can be set to a higher value by the resistor R
SLPE).
line
Fig.16 Typical application of the TEA1067, shown here with a piezoelectric earpiece and DTMF dialling.
BAS11
BZW14
(2 )
(2 )
R10
13
BZX79-
C12
R2
130 k
R3
3.92
k
Z bal
R4
C7
100 nF
C5
390
R8
R11
1 nF
100
C4
pF
20
R9
VA
IR
QR
QR
GAR
MIC
MIC
SLPE
(REG to
100 pF
19
C6
GAS1
LN
R VA
R7
GAS2
TEA1067
620
R1
REG
C3
4.7
F
AGC STAB V EE
R6
V CC
3.6
R5
k
MUTE
DTMF
PD
Product specification
MGR090
C1
100
F
TEA1067
control circuits
from dial
and