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PDF U3810BM Data sheet ( Hoja de datos )
| Número de pieza | U3810BM | |
| Descripción | Multi Standard Feature Phone Integrated Circuit | |
| Fabricantes | TEMIC Semiconductors | |
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TELEFUNKEN Semiconductors
U3810BM
Multi Standard Feature Phone Integrated Circuit
Description
The U3810BM multi-standard feature phone circuit is
designed to be used with a microcontroller using a 2-wire
serial bus. It performs all speech and line interface
functions required in an electronic telephone set: the
ringing function with switching regulator and melody
generator, the DTMF dialling, the loudhearing with
antilarsen and antidistortion systems, a power supply, a
clock and a reset for the microcontroller. Transmit, receive
and loudhearing gains control / AGC range / DTMF
frequencies, pre-emphasis and level / melody generator,
and mutes are programmable through the serial bus.
Block diagramm
Speech
circuit
LH
Loudhearing
and
Tone ringing
DTMF
dialer
Tone
ringer
Figure 1
MC
with
EEPROM
93 7600 e
Applications
D Feature phones
D Answering machines
D Fax machines
Rev. A1: 19.01.1996
Benefits
D Complete system integration of analog signal
processing and digital control circuitry
D One IC for various PTT standards, e.g. programmable
specification via mC
D Only three low-cost transducers needed (instead of
four)
1 (31)
1 page  
TELEFUNKEN Semiconductors
*
U3810BM
94 9331
Rev. A1: 19.01.1996
Figure 4 Application for feature phone
5 (31)
5 Page 
TELEFUNKEN Semiconductors
U3810BM
Parameters
Transmission
Transmit gain (note 1)
on MIC1 / MIC2
Test conditions
Min. Typ. Max.
VMIC = 3 mVrms
MIS TX2 TX1 TX0
max. gain 0 1 1 1 47.0 48.0
min. gain 0 0 0 0 39.8 41.0
49.0
42.2
on MICX
VMICX = 5 mVrms
max.gain
min. gain
MIS TX2 TX1 TX0
1111
1000
43.0
35.8
44.0
37.0
45.0
38.2
Gain adjustment of micro- Gain change between two steps (both on
phone amplifier
MIC1/MIC2 and on MICX)
0.8 1.0
1.2
Transmit gain without AGC VMIC = 3 mVrms, Bit AGC=1
DDGGGT TTataa2tt8IILLm==A2208
to
to
28
60
mA
mA
TX2 TX1 TX0
0 1 1 42.6 44.0
0 1 1 –0.5 0.0
0 1 1 –0.5 0.0
45.5
ă0.5
ă0.5
Gain change between
28 and 60 mA
on MIC1 / MIC2
on MICX
VMIC = 3mVrms:
(MIS = 0)
or VMICX = 5 mVrms
(MIS = 1)
AT1 AT0
00
01
10
11
3.6
4.9
6.3
7.7
4.1
5.35
6.9
8.2
4.6
5.9
7.4
8.7
+6 dB delta transmit gain
Noise at line
psophometrically weighted
IL = 28 mA and 60 mA
VMIC = 1.5 mVrms , Bit TX6 = 1
GT = max. gain
VMIC = 0 (MIS = 0) ISQ = 0
VMIC = 0 (MIS = 0) ISQ = 1
VMICX = 0 (MIS = 1) ISQ = 1
5.4 6.0
6.6
– 79 – 75
– 73 – 70
– 64
*Max. gain is without + 6 dB function which is especially devoted for DTMF
Muted gain
on MIC1 / MIC2
on MICX
Microphone input
impedance
on MIC1/MIC 2
on MICX
VMIC = 3 mVrms (MIS = 0) or
VMIC = 5 mVrms (MIS = 1)
(at max. and min. gain)
Bit IM = 1
Bit IT = 1
VMIC = 3 mVrms (MIS = 1) or
VMIC = 5 mVrms (MIS = 0)
VMIC = 3 mVrms (MIS = 0)
VMICX = 5 mVrms (MIS = 1)
65
65
60
60
70 110
35 55
CMRR common mode
rejection ratio
GT = at maximum gain
65
Voltage step on pin 26
IL =28 mA and 60 mA
when going from transmis- VMIC = 0 (MIS = 0) or
sion to mute mode
VMICX = 0 (MIS = 1)
– 75 +75
Bit IM from 0 to 1
At maximum gain
Dynamic limiter (anti-clipping) CACL = 470 nF, RACL = 6.8 MW operational only on MIC1/MIC2
Output voltage swing
(peak to peak value)
Delta output voltage swing
TX2 TX1 TX0
111
VMIC = 4 mVrms + 10 dB
TX2 TX1 TX0
000
VMIC = 9 mVrms + 10 dB
3.3
–200 0
4.4
200
Unit Fig.
dB
dB
6
dB
dB
dB 6
dB 6
dB 6
dB 6
6
dBmp
dB 6
dB
dB
dB
kW 6
kW
dB 6
mV 6
Vpp 6
mVpp 6
Rev. A1: 19.01.1996
11 (31)
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| PDF Descargar | [ Datasheet U3810BM.PDF ] | |
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