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MT9092AP Datasheet(PDF) 30 Page - Mitel Networks Corporation

Part # MT9092AP
Description  ISO2-CMOS ST-BUS??FAMILY Digital Telephone with HDLC (HPhone-II)
PDF  42 Pages
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Manufacturer  MITEL [Mitel Networks Corporation]
Direct Link  http://www.mitel.com
Logo MITEL - Mitel Networks Corporation

MT9092AP Datasheet(HTML) 30 Page - Mitel Networks Corporation

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MT9092
7-32
Applications
To maintain a fully differential topology in the
transmit path the suggested connection scheme for
the transmit microphones is shown in Figure 8.
However, it is possible to use a single-ended
arrangement as shown in Figure 9 for the transmit
interface. In this case the dynamic range of the
MT9092 is reduced by half. In both figures the output
drivers are connected in a fully differential manner.
The MT9092 is a member of the Mitel family of digital
terminal equipment components. There are two
transmisssion devices which connect directly with
the MT9092 to complete an application; the MT8930
(SNIC) and the MT8971/72 (DSIC/DNIC). An ISDN
4-wire
"TE"
function
is
implemented
with
the
MT8930/MT9092 combination. A 2-wire digital phone
for
PABX,
key-systems
and
other
proprietary
applications is implemented with the MT8971/72/
MT9092 combination.
Figures 10 and 11 show the 4-wire and 2-wire
applications, respectively.
Figure 8 - Application Circuit - fully differential audio input
ST-BUS
Port
to
Transmission
Device
Serial
Microport
INTEL
MCS-51
DSTi
DSTo
C4i
F0i
IRQ
SCLK
DATA2
DATA1
CS
WD
6
5
4
3
2
1
44
43 42
41 40
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22 23
24 25
26 27
28
29
30
31
32
33
34
35
36
37
38
39
LCD
MT9092
+5V
0.1
µF
0.1
µF
VBias
2R
T
Av = 1+
R
R
+
-
-
+
T
100K
VBias
100K
0.1
µF
+5V
330
Ω
511
Ω
+
10
µF
+
Electret
Microphone
511
Ω
+
-
R
2R
T
Av = 1+
R
+
-
T
100K
VBias
100K
0.1
µF
+5V
330
Ω
511
Ω
+
10
µF
+
Electret
Microphone
511
Ω
0.1
µF
+40
Ω nom.
32
Ω min.
150
Ω
75
Ω
+5V
75
Ω
.1
µF 1000pF
1000pF
1000pF caps
are optional
LCD
Note: Single-ended configurations reduce
dynamic range by a factor of two.
0.1
µF



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