mt91l61asr1 Zarlink Semiconductor, mt91l61asr1 Datasheet - Page 14

• Manufacturer Part Number: mt91l61asr1
• Description: 3 V Multi-featured Phone Codec With Programmable U/a Law Companding
• Manufacturer: Zarlink Semiconductor

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).
Microphone
Electret
10 µF
MOTOROLA
Controller
MCS-51
INTEL
+
Micro-
SPI
3V
or
+3V
+
511Ω
511Ω
330Ω
100K
0.1 µF
0.1 µF
0.1 µF
A/µ/IRQ
CS
SCLK
DATA1
DATA2
DATA2 Motorola
Mode only
+3V
0.1 µF
Differential Amplifier
0.1 µF
VBias
100K
100K
VBias
T
Av = 1 + 2R
+
-
+
-
Figure 8 - Wireless Phone Set
10
Zarlink Semiconductor Inc.
1
2
3
4
5
6
7
8
9
MT91L60/61
T
R
R
MT91L60
(
Typical External Gain
14
AV= 5-10
M+
M-
20
19
18
17
16
15
14
13
12
11
Microphone
Electret
10 µF
Baseband
Processer
+3V
Wireless
Phone
+
75Ω
)
+
75Ω
330Ω
1K
Din
Dout
Frame Pulse
Clock
Single-ended Amplifier
+3V
0.1 µF
M+
M-
VBias
T
VBias
150Ω
+
-
Data Sheet
R
M+
M-