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TEA7091 Datasheet(PDF) 3 Page - STMicroelectronics

Part # TEA7091
Description  TELEPHONE ANALOG FRONT END
PDF  7 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TEA7091 Datasheet(HTML) 3 Page - STMicroelectronics

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PIN DESCRIPTIONS
PQFP44
N
o Pins
PLCC44
N
o Pins
Names
Functions
1
7
VLS
Loudspeaker power supply.
2
8
VMC
Unregulated microcontroller supply.
3
9
VL
Line voltage.
4
10
VREFL
Loudspeaker reference voltage.
5
11
LSIN
Loudspeaker input.
6
12
LSSOF
Loudspeaker softclipping time constatnt.
7
13
DTMF
DTMF filter.
8
14
VRMC
Stabilized microcontroller supply.
9
15
OSC
Oscillator input.
10
16
RI/VI
Ring indicator / Line current variation indicator.
11
17
RESET
Microcontroller reset.
12
18
PON
Power on output.
13
19
CLK
Clock data input.
14
20
DATA
Data Input.
15
21
SNSL
Short line sidetone input.
16
22
SNLL
Long line sidetone input.
17
23
ACFSL
Anti-acoustic feedback and squelch peak voltage.
18
24
ACFFI
Anti-acoustic feedback and squelch filter.
19
25
RECIN
Receiving Input.
20
26
REOUT
Receive output.
21
27
GTR
Transmit gain adjustment.
22
28
HFIN
Handsfree microphone input.
23
29
MIC1
Microphone input.
24
30
MIC2
Microphone input.
25
31
VREF
Transmit and receive reference voltage (VCC/2).
26
32
VCC
Transmit and receive power supply.
27
33
TSOFT
Transmit soft-clipping time constant.
28
34
SOFTL
Maximum AC signal (Softclipping threshold).
29
35
IREF
Internal reference current.
30
36
VS
Shunt regulator capacitor.
31
37
SLP
DC mask slope.
32
38
GNDA
Analog Ground (signal).
33
39
ILL
Line current regulation start up.
34
40
ISL
Line current regulation stop.
35
41
EAR+
Positive earphone output.
36
42
EAR–
Negative earphone output.
37
43
GREC
Receive gain adjustment.
38
44
VZP
Switch mode power supply internal zener.
39
1
SWP
Switch mode power supply output.
40
2
RSU
Ring start up level.
41
3
RCO
Ring capacitor optimization (output power).
42
4
N.C.
Not Connected.
43
5
GNDP
Power Ground.
44
6
LSOUT
Loudspeaker Output.
TEA7091
3/7



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