Philips Semiconductors
Low voltage telephone transmission circuit with
dialler interface and regulated strong supply
Product specification
TEA1114A
handbook, full pagewidth
100
µF
Iline
VO
Zline
600
Ω
Iline
VLN
RCC
619 Ω
ICC
IDD
LN
IR
VCC
VDD
QR
VMIC
3
mA
MIC−
MIC+
DTMF
TEA1114A
220
nF
VDTMF
REG AGC SLPE VEE
CREG
4.7 µF
RSLPE
20 Ω
GAR
RX
MUTE
S1
CVDD
220 µF
CVCC
100 µF
10 µF RL1
RE2 CGAR
CGARS
RE1
100 kΩ
100
nF
RL2
10 kΩ
MGK809
Voltage gain defined as Gv = 20 log V--V---O-I- ; VI = VMIC or VDTMF.
Microphone gain: S1 = open.
DTMF gain and confidence tone: S1 = closed.
Inputs not being tested should be open-circuit.
Fig.15 Test figure for defining transmit gains.
2000 Mar 21
19