TEA1066T Philips Semiconductors (Acquired by NXP), TEA1066T Datasheet - Page 15

• Manufacturer Part Number: TEA1066T
• Description: Versatile Telephone Transmission Circuit With Dialer Interface
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
Table 1 Values of resistor R6 for optimum line loss compensation, for various usual values of exchange supply
1996 Apr 04
handbook, full pagewidth
Versatile telephone transmission circuit
with dialler interface
Voltage gain is defined as: G
open; for measuring the DTMF input, MUTE should be HIGH. Inputs not under test should be open.
V
exch
24
36
48
60
voltage V
(V)
C1
Fig.12 Test circuit for defining voltage gain of MICL+, MICL , MICH+ and MICH DTMF inputs.
100 F
10 F
V i
V i
exch
R
and exchange feeding bridge resistance R
exch
v
= 20 log V
61.9
100
140
= 400
X
9, 10
7, 8
13
15
16
14
o
/V
MICL /MICH
MICL /MICH
DTMF
MUTE
PD
IR
i
. For measuring the gain from MICL+, MICL or MICH+ and MICH the MUTE input should be LOW or
V EE
12
V CC
C3
4.7
F
17
REG
18
R
TEA1066T
exch
620
AGC
R1
48.7
78.7
110
19
R6
= 600
X
STAB
15
11
R5
3.6
k
LN
1
SLPE
R6 (k )
GAS1
GAS2
exch
20
GAR
R9
20
QR
QR
; R9 = 20
4
6
2
3
5
R
exch
R4
100 k
R7
68 k
93.1
120
68
= 800
X
100 pF
100 F
C7 1 nF
C4
100 pF
C6
600
R L
MBH127
I line
V o
Product specification
R
exch
TEA1066T
10 to 140 mA
60.4
102
= 1000
82
X