AS2524B austriamicrosystems AG, AS2524B Datasheet - Page 2

• Manufacturer Part Number: AS2524B
• Description: Telephone Line Interface and Speakerphone Circuit
• Manufacturer: austriamicrosystems AG

Data Sheet AS2523, AS2524, AS2524B
Pin description
Revision 1.12, Preliminary
Pin #
15
12
13
10
16
14
11
18
19
17
9
8
6
7
5
Symbol
AGND
VSS
VDD
STB
CS
M1
M2
M3
M4
RO
LS
SS
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
ine Current
ine
ide
upply
oltage
oltage
nalog
eceive
urrent
omplex
eceive
icrophone Input
icrophone Input
icrophone Input
icrophone Input
I
T
nput
one
S
G
S
S
D
I
O
I
ource Control Output
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
austriamicrosystems
to 300
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