AN6448NFBP Datasheet, PDF (1/11 Pages) Panasonic Semiconductor – Speech Network IC Incorporating Cross-Point Switch

AN6448NFBP
Speech Network IC Incorporating Cross-Point Switch
s Overview
The AN6448NFBP is a speech network IC suitable for multi-
function cordless telephones. It incorporates a cross-point
switch controlled by serial input. It allows speech path switch-
ing and mixing, and provides for three- or four-person commu-
nication and other sophisticated functions. It also incorporates
REC/PLAY amplifiers with VOX circuits.
s Features
• The speech block can operate on line voltage, with no exter-
nal power supply, and is operational even during a commer-
cial power failure.
• Incorporates auto. PAD, dial mute, DC voltage regulation,
and other basic speech functions.
• The cross-point switch can be operated independently.
• Each output of the cross-point switch can correspond to mul-
tiple inputs, allowing three-or four-person communication.
• The REC/PLAY amplifiers incorporate ALC and VOX circuits.
• Receiver volume can be increased by 6 dB or 9 dB.
48
49
17.2±0.4
14.0±0.3
Unit : mm
33
32
64
1
17
16
(0.8)
0.8
0.35^+-00..105
SEATING PLANE
QFP package with 64 pins (QFH064-P-1414A)
s Block Diagram
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
49
–
+
50
V_REF
51
52
53
–
+
ACL
ACL
VOX
Det
Det.
0dB 0dB
Comp
0dB
10dB
18
0/12
20
dB
18
dB
dB
dB
32
31
I
N 30
J
29
28
54
55
56 0dB
57 0dB
58 0dB
27
D
a₁
26
a₂
25
a₃
a₄
24
a₅
a₆
23
59
P.O.R
22
60
61
Line
Supply
AP
Monitor
62
63
V_REF
64
AP
Cont.
0dB
AP
0dB
DC
Cont.
21
DM
Cont.
20
0dB 19
0dB 18
20
dB
–
17
+
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16