Panasonic AN6472NFBP Datasheet

1

ICs for Telephone

■ Overview

The AN6472NFBP is a speech network IC which
includes a receiver noise reducing function and is most
suitable for quality cordless telephones. It incorporates a
cross-point switch controlled by serial input. It allows
speech path switching and mixing, and provides for
three- or four-person communication and other sophisti­cated functions. It also incorporates REC/PLAY amplifiers
with VOX circuits.

■ Features

•

The speech block can operate on line voltage, with no
external power supply, and is operational even during a
commercial power failure.

•

Incorporates a receiver noise reducing function to

improve the handset's howling margin.

•

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

multiple 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.

AN6472NFBP

Cordless Telephone Speech Network IC Incorporating
Cross-Point Switch

1

16

0.35±0.1

0.1±0.1

0.55

1.3±0.25

2.8±0.2

14.0±0.3

17.2±0.4

QFP package with 64 pins (QFH064-P-1414)

Unit : mm

0.15

1.3±0.25

0.8

14.0±0.3

17.2±0.4

17 32

64

48

33

49

+0.1

–0.05

2

ICs for Telephone

AN6472NFBP

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

64

63

62

61

60

59

58

57

56

55

54

53

52

51

50

49

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

–

+

–

+

6dB

0dB

0dB

Det.

30dB

AP
Control

AP

0dB

0dB

V

REF

0dB

+–

AP

DMC

DMC VCC

0/6/9dB

L(27)

L(

17)

L(1F)

0dB

DMC

DMC

0dB

0dB

L(OF)

VCC

+–

+–

L(3F)

DC
Control

DM
Control

+

–

V

REF

+

–

L(07)

ALC
Det.

0dB

0dB

VOX
Det.

Noise
Protection

Decoder

Latch

Power Supply

Control

INJ

P.O.R

Line Supply
Monitor

D
a1
a2
a3
a4
a5
a6

COMP

ALC

10dB

0dB

0dB

0/12
dB

20
dB

18dB18

dB

DCC

GND

GND

GND

■ Block Diagram

3

ICs for Telephone

AN6472NFBP

■ Pin Descriptions

Pin No.

Description
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

Ground
Line power (+) input
Side-tone adjustment
Line voltage control (1)
Int. ref. voltage output (2)
Int. ref. voltage output (1)
Trans. preamp. output
Noise reduction detection output
Noise reduction detection input
Noise reduction amp. output
Auto. PAD control
Rec. preamp. input
Rec. preamp. output
Rec. amp. input
Rec. amp. output (1)
Rec. amp. output (2)
BT signal input
DTMF preamp. output
DTMF signal input
MIC preamp. output
MIC preamp. input (1)
MIC preamp. input (2)
Dial mute control
Line voltage control
Line interruption detector output
Strobe signal input
Clock signal input
Data input
Ground
Logic power supply input
VOX detector output
SP link output

Pin No.

Description
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

RF2 link output
RF1 link output
Intercom link output
VOX detection control
VOX amp. input
Time stamp link output
Recording link output
ALC input
ALC detection control
Loudspeaker link input
Recording input
Recording inverse input
Recording preamp. output
Recording bias current control
To recording head
EQ amp. inverse input
EQ amp. output
REC/PLAY int. ref. voltage output
Ground
MIX preamp. output
MIX link input
AUX preamp. output
AUX link input
Intercom link input
RF1 link input
RF2 link input
Power-ON reset control
External supply voltage input
Internal supply voltage output
Circuit voltage control (2)
Line current bypass (2)
Line current bypass (1)

*1 In a free-air condition with Ta=75˚C

V

CC

I

CC

V

L

I

L

P

D

T

opr

T

stg

Supply voltage (1)
Supply current (1)
Supply voltage (2)
Supply current (2)
Power dissipation*1
Operating ambient temperature
Storage temperature

V

mA

V

mA

mW

˚C
˚C

Parameter Symbol Rating Unit

■ Absolute Maximum Ratings (Ta=25˚C)

7.0
50

12.0
135
640

–20 to+75

–55 to+150

4

ICs for Telephone

AN6472NFBP

Parameter Symbol Range

■ Recommended Operating Range

Operating supply voltage range (1)
Operating supply voltage range (2)

V

CC

V

L

4.5V to 5.5V

3.0V to 11.0V

Parameter Symbol min

4.5

1.6

1.2

1.6

0.8

1.6

1.2

0.8

0.8

0

5 5.5

250

20
20

V

CC

V

kHz

µs
µs
µs
µs
µs
µs
µs
µs
µs
µs

V

typ max Unit Condition

■ Recommended Operating Conditions (Ta =20 to +75˚C)

Supply voltage
Clock frequency

Input pulse width (high)
Input pulse width (low)
Clock pulse rise time
Clock pulse fall time
Input voltage

Input pulse width

Setup time

Hold time

V

CC

f

CLK

Input Duty 40% to 50%

t

W

t

su

t

h

t

wh

t

wl

t

r

t

r

V

i

CLK
STB
DATA
STB
DATA
STB

Parameter Symbol Condition min typ max

■ Electrical Characteristics (Ta=25±2˚C)

Power Supply Characteristics During Power Failure

Normal power supply characteristics

Line DC voltage (I-1)

V

L – I1

V3.5 3.83.2

Unit

V–DCC=HIGH,
IL=20mA, VCC=0V

Line DC voltage (E-1)

V

L – E1

V3.4 3.83.1

V– DCC=HIGH,
IL=20mA, VCC=5V

Line DC voltage (E-2)

V

L – E2

V4.7 5.14.3

V–DCC=HIGH,
IL=20mA, VCC=5V

V

L – E3

V6.8 7.36.3

V–DCC=HIGH,
IL=20mA, VCC=5V

Line DC voltage H (E-1)

V

LH – E1

V4.85 5.44.3

V–DCC=HIGH,
IL=20mA, VCC=5V

Line DC voltage (I-2)

V

L – I2

V4.8 5.24.5

V–DCC=HIGH,
IL=60mA, VCC= 0V

Line DC voltage (I-3)

V

L – I3

V7.0 7.56.6

V–DCC=HIGH,
IL=120mA, VCC= 0V

Line DC voltage H (I-1)

V

LH – I1

V5.0 5.54.5

V–DCC= LOW,
IL=30mA, VCC= 0V

Line DC voltage H (I-2)

V

LH – I2

V6.2 6.75.7

V–DCC= LOW,
IL= 60mA, VCC= 0V

Line DC voltage H (I-3)

V

LH – I3

V8.5 9.27.9

V–DCC= LOW,
IL=120mA, VCC= 0V

Internal supply voltage (I)

V

reg – I

V2.0 2.21.8

V– DCC=HIGH,
IL=20mA, VCC= 0V

Internal ref. supply voltage (I)

V

ref – I

V1.0 1.10.9

V–DCC=HIGH,
IL=20mA, VCC= 0V

Line DC voltage (E-3)

5

ICs for Telephone

AN6472NFBP

Parameter Symbol Condition min typ max

■ Electrical Characteristics (cont.) (Ta=25±2˚C)

Receiver During Power Failure

Line DC voltage H (E-2)

V

LH – E2

V5.95 6.65.3

Unit

V–DCC=LOW,
I

L

=60mA, VCC=5V

Rec. gain (I-1)

G

V – IR1

dB32.5 34.530.5

IL=30mA, VCC= 0V
Vin= – 42dBm

Rec. gain (I-2)

G

V – IR2

dB29 3127

IL= 80mA, VCC= 0V
Vin= –42dBm

Rec. auto. PAD width (I)*1

A

P – IR

dB3.5 52.5

IL=30mA– 80mA, VCC= 0V,
Vin= – 42dBm

Rec. max. output (I)

Rec. noise reduction (I)

V

O – IR

N

L – IR

dBm40

4

19

6

21

8

23

dB

dB

With IL=30mA, VCC= 0V, and
THD=5%

I

L

=30mA, VCC= 0V,
Vin= –42dBm
Vin–M= –65/–50dBm

I

L

=30mA, VCC= 0V,
V–DMC=LOW,
Vin= –30dBm

Line DC voltage H (E-3)

V

LH – E3

V8.2 8.97.55

V–DCC=LOW,
IL=120mA, VCC=5V

Internal supply voltage (E)

V

reg – E

V4.85 5.04.6

V–DCC=HIGH,
IL=20mA, VCC=5V

Internal ref. supply voltage (E)

V

ref – E

V2.5 2.72.25

V–DCC=HIGH,
IL=20mA, VCC=5V

Total circuit current
Power interruption detection (1)

Power interruption detection (2)

I

total

V

– HIT1

V

– HIT2

mA27 3517

0

4.4

0.1

4.95

0.6
5

V
V

V–DCC=HIGH,
IL=20mA, VCC=5V

VL=2.7V, VCC=5V
V

L

=1.5V, VCC=5V

G

V – IBT

Receiver On External Power Supply

Transmitter Amp. During Power Failure

Rec. gain (E-1)

G

V – ER1

dB32.5 34.530.5

IL=30mA, VCC=5V
Vin= –42dBm

Trans. gain (I-1)

G

V – IM1

dB30.2 32.228.2

R=27Ω(Pin3), IL=30mA,
VCC=0V, Vin= –38dBm

Trans. gain (I-2)

G

V – IM2

dB26.4 28.424.4

IL=80mA, VCC=0V,
Vin= –38dBm

A

P – IM

dB3.8 52.5

IL=30mA–80mA, VCC=0V,
Vin= –38dBm

Rec. gain (E-2)

G

V – ER2

dB28.8 30.826.8

IL=30mA, VCC=5V
Vin= –42dBm

Rec. auto. PAD width (E)*1

A

P – ER

dB3.7 52.5

IL=30mA–80mA, VCC=5V
Vin= –42dBm

Rec. max. output (E)

V

O – ER

dBm124

With IL=30mA, VCC=5V, and
THD=5%

Rec. noise reduction (E)

N

L – ER

dB8106

IL=30mA, VCC=5V,
Vin= –42dBm
Vin–M= –65/–65dBm

Rec. digital volume (1)*2

G

V – DV1

dB675

IL=30mA, VCC=5V,
V

in

= –42dBm, DV–1 ON

Rec. digital volume (2)*2

G

V – DV2

dB9 10.57.5

IL=30mA, VCC=5V,
Vin= –42dBm, DV–2 ON

BT amp. gain (E)

G

V – EBT

dB21.5 23.519.5

I

L

=30mA, VCC=5V,
V–DMC=LOW,
Vin= –30dBm

Rec. gain difference

DG–R dB– 0.1 1.2–1.2

For V

CC

=0V and 5V(between

Gv–IR1 and Gv–ER1)

BT amp. gain (I)

Trans. auto. PAD width (I)*1

Note) Unless otherwise specified, input signal Fin =1kHz, control voltage V-DOC = high, and control voltage V-DMC = high.
*1 Gain decrease when line current I

L

is changed from 30 to 80 mA. If pin 11 (auto. PAD control)is connected to pin 61 (int.

supply voltage output), the gain will not change.

*2 Gain increase from receiver gain (E-1).

6

ICs for Telephone

AN6472NFBP

Parameter Symbol Condition min typ max

■ Electrical Characteristics (cont.) (Ta=25±2˚C)

Transmitter Amp. On External Power Supply

Trans. max. output (I-1)

V

O – IM1

dBm3.50

Unit

With I

L

=30mA, VCC= 0V and

HD=5%

DTMF max. output (I-1)

V

O – ID1

dBm3.80

IL=30mA, VCC=0V,
V–DMC=LOW, THD=5%

Trans. gain (E-1)

G

V – EM1

dB30.6 32.628.6

IL=30mA, VCC= 0V,
Vin= –38dBm

Trans. gain (E-2)

G

V – EM2

dB27.0 29.025.0

IL=80mA, VCC=5V,
Vin= –38dBm

Trans. auto. PAD width (E)*1

A

P – EM

dB452.5

IL=30mA–80mA, VCC=5V,
Vin= –38dBm

Trans. max. output (E-1)

V

O – EM1

dBm62

With IL=30mA, VCC=5V and
THD=5%

Trans. max. output (E-2)

V

O – EM2

dBm62

IL=30mA, VCC=5V,
THD=5%, V–DCC=LOW

Trans. max. output (I-2)

V

O – IM2

dBm3.50

With IL=30mA, VCC= 0V,
THD=5% and V–DCC=LOW

DTMF gain (I-1)

G

V – ID1

dB19.5 21.517.5

IL=30mA, VCC= 0V,
V–DMC= LOW,
Vin= –30dBm

DTMF gain (I-2)

G

V – ID2

dB15.7 17.713.7

IL=80mA, VCC= 0V,
V–DMC=LOW,
V

in

= –30dBm

DTMF max. output (I-2)

V

O – ID2

dBm3.50

IL=30mA, VCC= 0V,
THD=5%, V–DMC=LOW,
V–DCC=LOW

DTMF auto. PAD width (I)*1

A

P – IDT

dB3.8 52.5

IL=30mA–80mA, VCC= 0V,
V–DMC= LOW,
Vin= –30dBm

DTMF gain (E-1)

G

V – ED1

dB20.1 22.118.1

IL=30mA, VCC=5V,
DM=ON, Vin= –30dBm

DTMF max. output (E-1)

V

O – ED1

V

O – ED2

dBm62

IL=30mA, VCC=5V,
V–DMC=LOW, THD=5%

Trans. gain difference

DG – M dB–0.8 0.7–1.8

For V

CC

= 0V and VCC=5V

(between Gv–IM1 and Gv–EM1)

DTMF gain difference

DG – MF dB–1.3 0.2–2.3

For V

CC

= 0V and 5V

(between Gv–ID1 and Gv–ED1)

DTMF gain (E-2)

G

V – ED2

dB16.5 18.514.5

I

L

=80mA, VCC=5V,
V–DMC=LOW,
Vin= –30dBm

DTMF auto. PAD width (E)*1

A

P – EDT

dB4.1 5.52.5

IL=30mA–80mA, VCC=5V,
V–DMC=LOW,
Vin= –30dBm

DTMF max. output (E-2)

dBm62

I

L

=30mA, VCC=5V,
DM=ON, V–DMC=LOW,
THD=5%

Note) Unless otherwise specified, input signal Fin=1 kHz, control voltage V-DOC=high, and control voltage V-DMC=high.

*1 Gain decrease when line current IL is changed from 30 to 80 mA. If pin 11 (auto. PAD control) is connected to pin 61(int.

supply voltage output) , the gain will not change.