AN6426NK Datasheet, PDF (1/9 Pages) Panasonic Semiconductor – Hands-free Speech Network IC

ICs for Telephone
AN6426NK
Hands-free Speech Network IC
s Overview
The AN6426NK incorporates both speech network and
hands-free functions. Its well designed block configura-
tion allows realization of a hands-free telephone with a
minimal number of components.
s Features
• Incorporates all the functions required of a hands-free
telephone.
• Incorporates all the functions required of a handset.
• Complies with AC and DC impedance requirements.
• Provides a wide dynamic range.
• A noise detecting circuit prevents inadvertent transmis-
sion.
• Operation on an external power supply is available.
• Each mode can be easily controlled.
• A built-in loudspeaker amplifier can operated either on
line voltage or an external power supply.
Unit : mm
1
42
21
13.7±0.3
3 to 15°
15.3±0.25
22
0.96±0.25
4.5±0.25
4.76±0.25
+0.1
0.3 – 0.05
SDIP package with 42 pins (SDIP042-P-0600A)
s Block Diagram
38 39
37 _–
Vrl
MA2
+
40
Vrl ₊
MA1
12 –
13
18
16
–
+
17
24
28 _R
VB ^Log
27
Vrl Rec
11
Pre
VB
TATT
10
19 14
AP
T
VB ^Log
+
–
Buff-
er
VL
VCC1
VCC2
15
41 42 36 34 29 6 5
Send
Power
Power
Power
Regulator
Regulator Regulator
Vr1
VCC1
GND
35 1
Matrix
Circuit
33
32
Matrix 31
Circuit
30
20
21
Attenator
Comp
Control
Vr1 –
Rec.1
AP
Buffer
+
Rec.2
Vr1
9
78
2
AGC
Vr2
S.Amp
3
4
25
22
23
VB
RATT
26
1