AS2522BF austriamicrosystems AG, AS2522BF Datasheet - Page 2

• Manufacturer Part Number: AS2522BF
• Description: Telephone Line Interface and Speakerphone Circuit
• Manufacturer: austriamicrosystems AG

Data Sheet AS2522B
Pin description
Revision 3.4
Pin #
13
10
11
14
12
18
19
17
31
7
8
9
6
4
5
3
Symbol
AGND
VDD
OSC
STB
VSS
CS
M1
M2
M3
M4
RO
SS
LS
RI
CI
LI
L
Analog input for sensing the line current
L
Analog input used for power extraction and line current sensing
R
Analog input for ac-separated receive signal
S
Analog input for side tone cancellation network
C
N-channel open drain output to control the external high power shunt transistor for
synthesizing AC- and DC-impedance, modulation of line voltage and shorting the line during
make periods of pulse dialing
C
Analog input pin for the capacitor to program a complex impedance
S
N-channel open drain output to control the external high power source transistor for supplying
(Vpp) the loudspeaker amplifier in off-hook loudspeaking/handsfree mode
V
Negative Analog Power Supply
V
Positive Analog Power Supply
A
Special ground for the internal amplifiers
M
Differential input for the handset microphone (electret)
M
Differential input for the handset microphone (electret)
M
Differential input for the handsfree microphone (electret)
M
Differential input for the handsfree microphone (electret)
R
Output for driving a dynamic earpiece with an impedance from 150
O
Input for ceramic resonator 3.58MHz.
ine Current
ine
eceive
ide
urrent
omplex
upply
oltage
oltage
nalog
eceive
scillator Input
icrophone Input
icrophone Input
icrophone Input
icrophone Input
I
T
nput
one
S
G
S
S
D
I
O
ource Control Output
I
nput
round
hunt Control Output
mpedance Input
ource
rain
utput to
B
S
alance Input
D
ense Input
S
rain
1
2
3
4
ource
H
andset
Function
to 300
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