as2504 austriamicrosystems, as2504 Datasheet - Page 2

• Manufacturer Part Number: as2504
• Description: Cordless Telephone, Answering Machine Line Interface
• Manufacturer: austriamicrosystems

Preliminary Data Sheet
Pin description
Pin #
13
14
25
26
11
12
28
27
24
23
7
5
6
3
4
2
1
Symbol
AGND
MASK
VDD
VSS
ATI1
ATI2
STB
LLC
CS
M1
M2
M3
M4
LS
RI
CI
LI
L
Input for sensing the line current
L
Input used for power extraction and line current sensing
R
Input for ac-separated receive signal
S
Input for side tone cancellation network
C
N-channel open drain output to control the external high power shunt transistor
for synthesising AC- and DC-impedance, modulation of line voltage and shorting
the line during make periods of pulse dialling
C
Input pin for the capacitor to program a complex impedance
MASK
Input pin to set circuit into power down mode during e.g. LD-dialling. During
MASK=HIGH, CS-pin is internally shorted to ground.
L
45mA-75mA
20mA-50mA
None
V
Positive Power Supply, for external circuitry t.m. 4.0mA@I
4.0mA@I
V
Negative Power Supply
A
Special ground for the internal amplifiers
M
Differential input for the microphone (electret)
M
Differential input for the microphone (electret)
M
Differential input for the microphone (electret)
M
Differential input for the microphone (electret)
A
R
A
R
ine Current
ine
ine
I
I
ide
oltage
oltage
eceive
urrent
omplex
nalogue
uxiliary
uxiliary
icrophone Input
icrophone Input
icrophone Input
icrophone Input
>= 25k
>= 100k
I
L
T
nput
oss
one
S
D
S
I
L
T
T
nput
I
hunt Control Output
=20mA
ource
rain
mpedance Input
G
C
ransmit
ransmit
B
round
ompensation Select Pin
S
alance Input
D
ense Input
S
rain
—> VDD
—> AGND
—> VSS
ource
1
2
3
4
I
I
nput
nput
1
2
2/12
Function
L
=20mA and
August 1998
AS2504