MT91L61 Datasheet, PDF (14/33 Pages) Mitel Networks Corporation – ISO2-CMOS 3 Volt Multi-Featured Codec (MFC)

MT91L60/61
Data Sheet
Applications
Figure 8 shows an application in a wireless phone set. Figure 9 shows an MT9161B’s delayed frame pulse driving
a second MT9161B. This configuration would be used where multiple CODEC’s were using a data bus (an example
being Zarlink’s ST-BUS).
+
10 µF
330Ω
+3V
511Ω 0.1 µF _100K
+
-
R
+
Electret
Microphone
511Ω
VBias
0.1 µF
100K
T ^{Av = 1 + 2R}
T
R
-
+
Differential Amplifier
330Ω
VBias ₊
M+
+
+3V
M+
-
T
10 µF
1K 0.1 µF
R
+
Electret
Microphone
VBias
M-
Single-ended Amplifier
M-
0.1 µF
VBias
( ) Typical External Gain
AV= 5-10
M+
M-
0.1 µF
0.1 µF
100K
+3V
3V
INTEL
MCS-51
or
MOTOROLA
SPI
Micro-
Controller
A/µ/IRQ
CS
SCLK
DATA1
DATA2
DATA2 Motorola
Mode only
1
20
2
19
3
18
4
17
5 ^MT91L60 ₁₆
6
15
7
14
8
13
9
12
10
11
75Ω
+3V _75Ω
150Ω
Wireless
Phone
Baseband
Processer
Din
Dout
Frame Pulse
Clock
Figure 8 - Wireless Phone Set
14
Zarlink Semiconductor Inc.