AS2525F AMSCO [austriamicrosystems AG], AS2525F Datasheet - Page 2

• Manufacturer Part Number: AS2525F
• Description: Single-Chip Handsfree Phone CMOS Integrated Circuit
• Manufacturer: AMSCO [austriamicrosystems AG]

Datasheet AS2525
Pin Description
Revision 2.1
Pin #
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
Symbol
CS2
DPn
STB
FT1
FT2
V
HF
HS
M4
M2
M3
M1
CS
SS
LS
RI
CI
LI
SS
Supply
Type
DO
DO
AO
AO
DI
DI
AI
AI
AI
AI
AI
AI
AI
AI
AI
AI
AI
C
Chip select signal for external LCD driver circuit or 2 mA LED
If signal is not activated, a pull down resistor (100 k ) is inserted.
D
Digital output that holds the line during off-hook operation or pulls low during break periods
of pulse dialing and flash.
H
This is a Schmitt-trigger input that is pulled high to enable handsfree operation.
H
This is a Schmitt-trigger input that is pulled high by the hook switch to enable handset or
headset operation.
Analogue input pin for connecting a capacitor for offset cancellation.
Analogue input pin for connecting a capacitor for offset cancellation.
M
Differential input for the handsfree microphone (electret).
M
Differential input for the handset microphone (electret).
M
Differential input for the handsfree microphone (electret).
M
Differential input for the handset microphone (electret).
S
Analogue 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.
V
Negative Power Supply.
L
Analogue input used for power extraction and line current sensing.
R
Analogue input for ac-separated receive signal.
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.
L
Analogue input for sensing the line current.
C
Analogue input pin for the capacitor to program a complex impedance.
ine
ine Current
ide
oltage
upply
hip
ial
ands
and
urrent
eceive
omplex
icrophone Input
icrophone Input
icrophone Input
icrophone Input
P
I
T
S
S
nput
F
ulse Output
one
et Switch Input
elect
S
ree Switch Input
S
S
I
ource Control Output
I
nput
hunt Control Output
ource
mpedance Input
B
2
S
alance Input
ense Input
S
4
2
3
1
ource
Description
austriamicrosystems
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