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參數(shù)資料
| 型號： | AN6472NFBP |
| 廠商： | PANASONIC CORP |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Cordless Telephone Speech Network IC Incorporating Cross-Point Switch |
| 中文描述： | TELEPHONE SPEECH CKT, PQFP64 |
| 封裝： | 14 X 14 MM, PLASTIC, QFP-64 |
| 文件頁數(shù)： | 11/19頁 |
| 文件大?。?/td> | 216K |
| 代理商： | AN6472NFBP |
11
ICs for Telephone
AN6472NFBP
I
Pin Descriptions (cont.)
Waveform
Description
Remarks
Pin No.
Pin name
I/O
Equivalent circuit
8
9
10
11
12
13
14
15
·
16
17
18
19
I
O
I
I
O
O
O
I
O
I
APC
RV IN
Noise reduction detection amp. out-
put : A smoothing capacitor C6 and
R5 connect to this pin to adjust the
attack and recovery times of noise
reduction.
Noise reduction detection amp. input
: Noise reduction amp. output is fed
through C7 and R6 to this pin.
Noise reduction amp. output :
Connects to the noise reduction
detection amp. input.
Auto. PAD control :
Connects through a resistance to Pin
6
1(Vreg). If the resistance increases,
the PAD operates closer to the near
end. If the resistance decreases, the
PAD operates closer to the far end.
Rec. preamp. input :
Receiver signals are input from
the side-tone circuit to this pin.
R8 and C9 connected between
Pin 1
3
and this pin determine
the f. characteristics.
Rec. preamp. output :
R8 and C9 connected between Pin
12
and this pin determine the f. charac-
teristics.
The output impedance is up to 1 k
.
Rec. amp. input :
Rec. amp. outputs (1 and 2) :
A ceramic or dynamic receiver
is connected.
The output circuit is a BTL
configuration.
The output impedance is up to
50
.
BT signal input :
BT (beep tone) signals are input
through C15 to this pin.
Input impedance is 10 k
.
DTMF preamp. output :
A C/R combination between
Pin 19 and this pin determines
the f. characteristics of the
DTMF preamp.
DTMF signal input :
DTMF
through a capacitor to this pin.
DTMF signals are enabled
when DMC is low at Pin 40.
signals
are
input
VN
DET–
IN
RV
PREOUT
BT–
IN
MF –
IN
RV
FILTER
RV
OUT
(1)
RV
OUT
(2)
MF –
OUT
VN
OUT
Vreg-R · I
IL
VN
DET
V
REF
– SN
V
REF
– SN
Signal input
V
REF
– SN
Signal input
G = 64K
This pin must be
grounded
reduction is not used.
The greater C7, the lon-
ger the attack time. The
smaller R6, the shorter
the recovery time.
Noise reduction detec-
tion amp. gain (G) is :
if
noise
1
ω
C9
1 1
ω
C10
In the application circuit,
MIC. IN (–) is input
through a capacitor. This
capacitor and R12-R14,
and C15 and C16 deter-
mine the f. characteris-
tics.
The 10
k
input impe-
dance and C12 or C13
form a HPF.
DC (with a capacitor)
Input
V
REF
V
REF
– SN
V
REF
– SN
V
REF
– SN
V
REF
– SN
–
+
8
64k
Vref–SN
–
+
10
3k
Vref–SN
9
0.1
μ
F
95k
I
I
∝
I
L
11
–
+
13
12
–
+
10k
13
–
+
30k
10k
15
16
13
–
+
17
10k
Vref–SN
–
+
18
–
+
19
18
Vref–SN
10k
V
REF
– SN
(with no capacitor)
P
8
The receiver preamplifier
gain (G) is :
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