1
ICs for Telephone
s
Overview
The AN6175K is a speech network IC incorporating a
hands-free function. It provides for a high-quality hands-
free telephone or handset telephone. The hands-free
telephone function(HF)includes :
MIC amplifier capable of mute and gain control
Background noise monitoring
Voice switching attenuation control
Symmetrical transmitter/receiver attenuators
Dynamic loudspeaker amplifier
The handset telephone function(HF)includes:
Automatic pad capable of detecting transmission
distance
MIC amplifier
Receiver preamplifier
Dynamic loudspeaker amplifier
s
Features
Provides all the functions required of a hands-free or
handset telephone.
Can operate on line voltage (requiring no external
power supply).
Consumes minimal current.
Provides for an external filter ensuring a wide range of
howling suppression.
Mute mode for hands-free operation
Background noise monitoring to improve transmission
quality
100 mW loudspeaker output (at I
L
=100mA)
Built-in power supply and low-voltage regulator
DIP package with 42-pins or QFH package with 44-pins
AN6175K
Hands-free Speech Network IC
3
15
Unit : mm
15.3
0.25
0.3
+
0.1
-
0.05
AN6175K
SDIP package with 42 pins (SDIP042-P-0600A)
36.8
0.3
0.9
0.25
13.7
0.3
0.5
0.1
1.778
4.76
0.25
3.3
0.25
0.96
0.25
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
2
ICs for Telephone
AN6175K
4
2
4
1
4
0
3
9
3
8
3
7
3
6
3
5
3
4
3
3
3
2
3
1
3
3
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
1
2
3
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
T
A
P
C
V
r
C
O
N
T
+
-
I
N
T
B
G
R
V
C
C
+
-
R
A
P
C
A
T
T
C
O
N
T
T
N
D
+
-
+
-
+
-
D
I
A
P
C
R
A
O
T
A
O
A
T
C
R
V
R
C
O
N
T
R
E
C
-
R
L
O
2
R
L
O
1
T
L
O
2
T
L
O
1
R
L
I
2
R
L
I
1
T
L
I
2
T
L
I
1
T
V
R
T
N
D
L
O
G
5
(
H
S
)
M
A
O
(
H
S
)
M
A
I
(
H
F
)
M
A
I
(
H
F
)
M
A
O
S
O
U
T
V
C
C
1
B
G
R
T
R
E
T
R
B
V
C
C
2
H
F
I
M
F
I
S
T
V
r
H
S
/
H
F
H
S
,
H
F
/
M
F
R
P
I
R
P
O
V
S
P
S
P
I
F
B
S
P
O
1
S
P
O
2
G
N
D
D
O
V
r
V
r
S
P
P
r
e
S
P
V
r
R
A
T
T
C
O
U
N
T
1
C
O
U
N
T
2
L
O
G
1
V
r
V
r
V
r
L
O
G
2
L
O
G
4
L
O
G
3
T
A
T
T
4
1
4
0
4
0
4
1
+
I
L
V
L
V
C
C
1
4
+
-
+
-
s
Block Diagram
3
ICs for Telephone
AN6175K
V
CC2
I
L
P
D
T
opr
T
stg
Supply voltage
Supply current
Power dissipation
Note)
Operating ambient temperature
Storage temperature
V
mA
mW
C
C
Parameter
Symbol
Rating
Unit
s
Absolute Maximum Ratings
(Ta=25
C)
12.0
120
1016
20 to + 75
55 to + 150
Note) In an open condition with Ta=25
C
s
Pin Descriptions
Pin No.
Description
Symbol
Symbol
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
Pin No.
Description
MAO
(HF)
MAI
(HF)
MAI
(HS)
MAO
(HS)
MIC amp. output (hands-free mode)
MIC amp. input (hands-free mode)
MIC amp. input (handset mode)
MIC amp. output (handset mode)
Hands-free mode transmission noise detection
Noise detection reference
LOG amp. (1) input (from MIC amp. output)
LOG amp. (1) output
LOG amp. (2) output
LOG amp. (3) output
LOG amp. (4) output
Receiver switching (hands-free mode)
Receiver att. gain control
Receiver att. switching control
Transmitter att. output (hands-free mode)
Receiver att. output (hands-free mode)
Receiver amp. input ()
TND
TVR
TLI1
TLI2
RLI1
RLI2
TLO1
TLO2
RLO1
RLO2
DO
GND
SPO2
SPO1
FB
SPI
VSP
RPO
RPI
HS/HF
Vr
ST
MFI
HFI
V
CC2
TRB
TRE
BGR
V
CC1
SOUT
REC
CONT
RVR
ATC
TAO
RAO
APC
DI
Receiver amp. output
Ground
Loudspeaker amp. (2) output
Loudspeaker amp. (1) output
Loudspeaker amp. input ()
Loudspeaker amp. input (+)
Loudspeaker amp. power input
Receiver preamp. output
Receiver preamp. input
Mode switching (handset or hands-free/MF)
Mode switching (handset/hands-free)
Reference for handset or hands-free mode
To the base of the power supply transistor
MF input
From transmitter att. output (hands-free mode)
Transmission amp. AC impedance setting
To the base of the transmission transistor
To the emitter of the transmission transistor
Band-gap ref. voltage output
Hands-free control output
HS,
HF/MF
LOG amp. (2) input
(from hands-free control output)
LOG amp. (4) input
(from receiver preamp. output)
LOG amp. (3) input
(from loudspeaker amp. output)
Auto. PAD current control
(handset mode, MF)
Power output to the handset and hands-free
circuits
4
ICs for Telephone
AN6175K
Parameter
Symbol
Condition
min
typ
max
s
Electrical Characteristics
(Ta=25
2
C)
HS mode line voltage (1)
HS mode line voltage (2)
HS mode V
CC
2 voltage (1)
HS mode V
CC
2 voltage (2)
HS mode V
CC
1 voltage (1)
HS mode V
CC
1 voltage (2)
V
LS1
V
LS2
V
CS21
V
CS22
V
CS11
V
CS12
V
4.0
SW1,2 : a
I
L
= 20mA, V
L
voltage
SW1/2 : a/a
I
L
= 120mA, V
L
voltage
SW1/2 =a/a,
I
L
= 20mA, DC voltage at pin37
SW1/2 =a/a,
I
L
= 120mA, DC voltage at pin37
SW1/2 =a/a,
I
L
= 20mA, DC voltage at pin41
SW1/2 =a/a,
I
L
= 120mA, DC voltage at pin41
4.4
HS power supply
HF power supply
3.6
V
10.5
11.5
9.5
V
3.7
4.1
3.3
V
9.3
10.3
8.3
V
2.0
2.4
1.6
V
4.8
5.2
4.4
HF mode line voltage (1)
HF mode line voltage (2)
HF mode V
CC
2 voltage (1)
HF mode V
CC
2 voltage (2)
HF mode V
CC
1 voltage (1)
HF mode V
CC
1 voltage (2)
V
LF1
V
LF2
V
CF21
V
CF22
V
CF11
V
CF12
V
4.0
SW1/2=a/b,
I
L
= 20mA, V
L
voltage
SW1/2=a/b,
I
L
= 120mA, V
L
voltage
SW1/2=a/b,
I
L
= 20mA, DC voltage at pin37
SW1/2=a/b,
I
L
= 120mA, DC voltage at pin37
SW1/2=a/b,
I
L
= 20mA, DC voltage at pin41
SW1/2=a/b,
I
L
= 120mA, DC voltage at pin41
4.4
3.6
V
10.5
11.5
9.5
V
3.7
4.1
3.3
V
9.3
10.3
8.3
V
2.0
2.4
1.6
V
4.8
5.2
4.4
Unit
Trans. amp. gain
MF trans. amp. auto. PAD
GHS
APMF
dB
29
Vin1= 30dBm
Gain Difference with
Vin2= 30dBm, I
L
= 20 to 120mA
31
HS transmitter
27
Trans. amp. distortion
THS
%
0.3
Vin1= 30dBm
2.0
Trans. amp. max output
VHS
dBm
2.5
THS= 5%
0.5
Trans. amp. noise
NHS
dBm
Rg= 2k
with a CCITT filter
65
MF trans. amp. gain
GMF
dB
29
Vin2= 30dBm
31
27
MF trans. amp. distortion
TMF
%
0.3
Vin2= 30dBm
2.0
MF trans. amp. max output
VMF
dBm
3.0
TMF= 5%
0
dB
6
8
4
Trans. level auto. PAD
APS
Gain Difference with
Vin1= 30dBm, I
L
= 20 to 120mA
dB
6
8
4
HS receiver
Rec. amp. gain
GHR
dB
19
Vin3= 35dBm
21
17
Rec. amp. distortion
THR
%
1.5
Vin3= 35dBm
5
Rec. amp. max output
VHR
dBm
7
THR= 5%
10
Rec. amp. noise
NHR
dBm
Rg=2k
with a CCITT filter
75
Rec. amp. auto. PAD
APR
Gain Difference with
Vin3= 35dBm, I
L
= 20 to 120mA
dB
6
8
4
Note: Unless otherwise specified, I
L
=20 mA and f
in
=1 kHz.
5
ICs for Telephone
AN6175K
Parameter
Symbol
Condition
min
typ
max
s
Electrical Characteristics (cont.)
(Ta=25
2
C)
Unit
Trans. gain (1)
G
FS1
Vin4= 65dBm
I
L
=20mA
HF transmitter
dB
60
63
57
Trans. gain (2)
G
FS2
Vin4= 65dBm
I
L
=120mA
dB
66
69
63
Trans. noise
N
FS
Rg=2k
,
I
L
=20mA with a CCITT filter
dBm
58
Trans. att. gain (1)
G
TA MAX1
Vin4= 60dBm
I
L
=20mA
dB
31
34
28
Trans. att. gain range (1)
Trans. att. idling gain (1)
G
TA MIN1
Vin4= 60dBm
I
L
=20mA
dB
48
45
G
TA IDL1
Vin4= 60dBm
I
L
=20mA
dB
4
7
1
Trans. att. gain (2)
G
TA MAX2
Vin4= 60dBm
I
L
=20mA
dB
36
39
33
Trans. att. gain range (2)
Trans. att. idling gain (2)
G
TA MIN2
Vin4= 60dBm
I
L
=20mA
dB
50
47
G
TA IDL2
Vin4= 60dBm
I
L
=20mA
dB
6
9
3
Rec.gain (1)
G
FR1
Vin3= 50dBm
I
L
=20mA
HF receiver
dB
37
40
34
Rec. gain (2)
G
FR2
Vin3= 50dBm
I
L
=120mA
dB
43
46
40
Rec. distortion
TSP
Vin3= 50dBm
I
L
=20mA
%
1.5
5.0
Rec. max output (1)
V
SP1
TSP=5%, I
L
=20mA
dBm
7
10
Rec. max output (2)
Rec. noise
V
SP2
TSP=5%, I
L
=120mA
dBm
7
4
N
FR
Rg=2k
,
I
L
=20mA with a CCITT filter
dBm
60
Rec. att. gain (1)
G
RA MAX1
Vin3= 40dBm
I
L
=20mA
dB
12
15
9
Rec. att. gain range (1)
Rec. att. idling gain (1)
Rec. att. gain (2)
Rec. att. gain range (2)
Rec. att. idling gain (2)
Rec. att. volume characteristics
G
RA MIN1
Vin3= 40dBm
I
L
=20mA
dB
52
49
G
RA IDL1
Vin3= 40dBm
I
L
=20mA
dB
12
9
15
G
RA MAX2
Vin3= 40dBm
I
L
=120mA
dB
17
20
14
G
RA MIN2
Vin3= 40dBm
I
L
=120mA
dB
56
53
G
RA IDL2
Vin3= 40dBm
I
L
=120mA
dB
10
7
13
G
RA VRM
Vin3= 40dBm
I
L
=20mA
dB
2
0
4
1.0
2.0
1.17
610
HS mode internal reference voltage (1)
V
rs
Pin31 high, Pin32 high,
I
L
=20mA
HS power supply
V
HS mode internal reference voltage (2)
V
SPS
Pin31 high, Pin32 high,
I
L
=20mA
V
HS mode internal reference voltage (3)
V
BGS
Pin31 high, Pin32 high,
I
L
=20mA
Pin31 high, Pin32 high,
I
L
=20mA
V
HS mode AC impedance
Z
ACS
Parameter
Symbol
Condition
Design value
s
Electrical Characteristics (Design Values for Reference)
(Ta=25
2
C)
Unit
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