MT9092AP Zarlink, MT9092AP Datasheet - Page 34

• Manufacturer Part Number: MT9092AP
• Description: Digital Telephone 44-Pin PLCC Tube
• Manufacturer: Zarlink

Specifications of MT9092AP

• Package: 44PLCC
• Power Supply Type: Analog
• Typical Supply Current: 8 mA
• Typical Operating Supply Voltage: 5 V
• Minimum Operating Supply Voltage: 4.75 V
• Maximum Operating Supply Voltage: 5.25 V

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 Zarlink 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.
Transmission
Microport
MCS-51
ST-BUS
INTEL
Serial
Device
Port
to
+5V
DATA2
DATA1
SCLK
DSTo
Av = 1+
DSTi
IRQ
WD
C4i
F0i
CS
10
11
12
13
14
15
16
17
7
8
9
2R
T
18 19 20 21 22 23 24 25 26 27 28
Figure 8 - Application Circuit - Fully Differential Audio Input
R
R
6
0.1µF
5
+
-
-
+
4
T
3
0.1µF
VBias
2
100K
100K
MT9092
VBias
1
Zarlink Semiconductor Inc.
44
0.1µF
0.1µF
+5V
MT9092
43 42
LCD
34
330Ω
511Ω
511Ω
41 40
Av = 1+
+
2R
T
+
Electret
Microphone
10µF
R
39
38
37
36
35
34
33
32
31
30
29
R
LCD
+
-
+
-
.1µF 1000pF
75Ω
+5V
Note: Single-ended configurations reduce
T
dynamic range by a factor of two.
75Ω
100K
100K
VBias
0.1µF
0.1µF
1000pF
+5V
1000pF caps
are optional
+
330Ω
511Ω
511Ω
Data Sheet
Electret
Microphone
150Ω
40Ω nom.
32Ω min.
+
+
10µF