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| 型號(hào)： | AS2540-ZSOW |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 無(wú)繩電話/電話 |
| 英文描述： | Remote controlled Basic Phone; Package Type: SOIC-28; Temperature Range: -15 - +60 °C; Output Interface: 2-Wire Serial; Supply Voltage: 3,60-5,00 |
| 封裝： | SOIC-28 |
| 文件頁(yè)數(shù)： | 2/18頁(yè) |
| 文件大?。?/td> | 248K |
| 代理商： | AS2540-ZSOW |
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Data Sheet AS2540
austria
micro
systems
Revision 3.1
Page 2 of 18
Pin Description
Pin #
Symbol
Function
15
RFD
R
ing
F
requency
D
iscrimination
Schmitt trigger input for ring frequency discrimination. Disabled during off-hook.
7
LS
L
ine Current
S
ense Input
Input for sensing the line current
5
LI
L
ine
I
nput
Input used for power extraction and line current sensing
6
RI
R
eceive
I
nput
Input for ac-separated receive signal
2
STB
S
ide
T
one
B
alance Input
Input for side tone cancellation network
3
CS
C
urrent
S
hunt Control Output
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
8
CI
C
omplex
I
mpedance Input
Input pin for the capacitor to program a complex impedance
16
DPn
D
ial
P
ulse Output
Open drain output pulls low during break periods of pulse dialling and flash
17
EHS
E
lectronic
H
ook
S
witch
Schmitt Trigger Input to detect an electronic off-hook.
18
MHS
M
anual
H
ook
S
witch
Schmitt Trigger Input to detect a manual off-hook.
19
MODE
D
TMF
L
evel
S
election
-4/-6dBm
-6/-8dBm
-8/-10dBm
—>
—>
—>
DLS open
DLS-r1
DLS-r2
L
ine
L
oss
C
ompensation Select Pin
45mA-75mA
20mA-50mA
None
—>
—>
—>
LLC open
LLC-r3
LLC-r4
28
MO
Ring
M
elody
O
utput
PDM output of the ring melody generator.
11
VDD
V
oltage
D
rain
D
rain
Positive Power Supply
4
VSS
V
oltage
S
ource
S
ource
Negative Power Supply
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