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參數(shù)資料
| 型號(hào)： | TEA1066T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Versatile telephone transmission circuit with dialler interface |
| 中文描述： | TELEPHONE SPEECH CKT, PDSO20 |
| 封裝： | PLASTIC, SO-20 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 133K |
| 代理商： | TEA1066T |
1996 Apr 04
4
Philips Semiconductors
Product specification
Versatile telephone transmission circuit
with dialler interface
TEA1066T
PINNING
SYMBOL
PIN
DESCRIPTION
LN
GAS1
1
2
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, low
impedance
inverting microphone input, high
impedance
non-inverting microphone input, low
impedance
non-inverting microphone input,
high impedance
current stabilizer
negative line terminal
receiving amplifier input
power-down input
dual-tone multi-frequency input
mute input
supply voltage decoupling
voltage regulator decoupling
automatic gain control input
slope (DC resistance) adjustment
GAS2
3
QR
QR+
4
5
GAR
MICL
6
7
MICH
8
MICL+
9
MICH+
10
STAB
V
EE
IR
PD
DTMF
MUTE
V
CC
REG
AGC
SLPE
11
12
13
14
15
16
17
18
19
20
Fig.2 Pin configuration.
handbook, halfpage
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
MBH120
TEA1066T
LN
GAS1
GAS2
QR
QR
+
GAR
MICL
MICH
MICL
+
SLPE
AGC
REG
VCC
IR
DTMF
VEE
MUTE
PD
STAB
MICH
+
FUNCTIONAL DESCRIPTION
Supplies: V
CC
, LN, SLPE, REG and STAB
Power for the TEA1066T and its peripheral circuits is
usually obtained from the telephone line. The TEA1066T
develops its own supply voltage at V
CC
and regulates its
voltage drop. The supply voltage V
CC
may also be used to
supply external peripheral circuits, e.g. dialling and control
circuits.
The supply has to be decoupled by connecting a
smoothing capacitor between V
CC
and V
EE
; the internal
voltage regulator has to be decoupled by a capacitor from
REG to V
EE
. An internal current stabilizer is set by a
resistor of 3.6 k
between STAB and V
EE
.
The DC current flowing into the set is determined by the
exchange supply voltage (V
exch
), the feeding bridge
resistance (R
exch
), the DC resistance of the telephone line
(R
line
) and the DC voltage on the subscriber set
(see Fig.7).
If the line current I
line
exceeds the current I
CC
+ 0.5 mA
required by the circuit itself (approximately 1 mA) plus the
current I
p
required by the peripheral circuits connected to
V
CC
, then the voltage regulator diverts the excess current
via LN.
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