u4090b-fn ATMEL Corporation, u4090b-fn Datasheet - Page 6

• Manufacturer Part Number: u4090b-fn
• Description: Monolithic Integrated Feature Phone Circuit
• Manufacturer: ATMEL Corporation

U4090B
6 (34)
IMPSEL
SWOUT
VRING
TSACL
SENSE
LIDET
DTMF
MICO
COSC
RFDO
MIC2
MIC1
V MPS
GND
THA
SAO
V MP
IND
G T
PD
V L
V B
10
11
12
13
14
15
16
17
18
19
20
21
22
1
2
3
4
5
6
7
8
9
U4090B
94 7905 e
Preliminary Information
34
33
32
28
24
23
44
43
42
41
40
39
38
37
36
35
31
30
29
27
26
25
TXIN
RECIN
TTXA
G R
RECO1
RAC
STIL
STIS
RECO2
MUTR
V M
STO
IREF
AGA
TLDR
TLDT
INLDR
INLDT
ATAFS
MUTX
SAI
GSA
Pin Description
Pin
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
SWOUT
Symbol
SENSE A small resistor (fixed) connected
DTMF
MIC 2
MIC 1
MICO
COSC
V
GND
SAO
V
IND
PD
V
G
V
MPS
MP
T
L
B
A resistor from this pin to GND sets the
amplification of microphone and DTMF
signals, the input amplifier can be muted
by applying VMP to G
Input for DTMF signals,
also used for the answering machine
and handsfree input
Output of microphone preamplifier
Non-inverting input of microphone
amplifier
Inverting input of microphone
amplifier
Active high input for reducing the
current consumption of the circuit,
simultaneously V
internal switch
The internal equivalent inductance of
the circuit is proportional to the value
of the capacitor at this pin,
a resistor connected to ground may be
used to reduce the dc line voltage
Line voltage
Reference point for dc- and ac-output
signals
from this pin to V
the dc characteristic and also effects
the line length equalization
characteristics and the line current at
which the loudspeaker amplifier is
switched on
Unregulated supply voltage for
peripheral circuits (voice switch),
limited to typically 7 V
Output of loudspeaker amplifier
Unregulated supply voltage for P,
limited to 6.3 V
Regulated supply voltage 3.3 V for
peripheral circuits (especially
microprocessors),
minimum output current: 2 mA
(ringing)
4 mA (speech mode)
Output for driving external switching
transistor
40 kHz oscillator for ringing power
converter
TELEFUNKEN Semiconductors
Function
L
L
is shorted by an
sets the slope of
Rev. C1, 28-Oct-96
T
.