Philips Semiconductors
Versatile telephone transmission circuit
with dialler interface
Product specification
TEA1068
PINNING
SYMBOL
LN
GAS1
GAS2
QR−
QR+
GAR
MIC−
n.c.
MIC+
STAB
VEE
IR
n.c.
PD
DTMF
MUTE
VCC
REG
AGC
SLPE
PIN
TEA1068 TEA1068T
1
1
2
2
3
3
4
4
5
5
6
6
7
7
−
8
8
9
9
10
10
11
11
12
−
13
12
14
13
15
14
16
15
17
16
18
17
19
18
20
DESCRIPTION
positive line terminal
gain adjustment transmitting amplifier
gain adjustment transmitting amplifier
inverting output receiving amplifier
non-inverting output receiving amplifier
gain adjustment receiving amplifier
inverting microphone input
not connected
non-inverting microphone input
current stabilizer
negative line terminal
receiving amplifier input
not connected
power-down input
dual-tone multi-frequency input
mute input
positive supply decoupling
voltage regulator decoupling
automatic gain control input
slope (DC resistance) adjustment
handbook, halfpage
LN 1
18 SLPE
GAS1 2
17 AGC
GAS2 3
16 REG
QR− 4
QR+ 5
15 VCC
TEA1068 14 MUTE
GAR 6
13 DTMF
MIC− 7
12 PD
MIC+ 8
11 IR
STAB 9
10 VEE
MBH132
Fig.2 Pin configuration TEA1068.
1996 Apr 23
handbook, halfpage
LN 1
20 SLPE
GAS1 2
19 AGC
GAS2 3
18 REG
QR− 4
17 VCC
QR+ 5
16 MUTE
TEA1068T
GAR 6
15 DTMF
MIC− 7
14 PD
n.c. 8
13 n.c.
MIC+ 9
12 IR
STAB 10
11 VEE
MBH131
Fig.3 Pin configuration TEA1068T.
4