73M1866B-IMR/F Maxim Integrated Products, 73M1866B-IMR/F Datasheet - Page 21

• Manufacturer Part Number: 73M1866B-IMR/F
• Description: MICRODAA SGL PCM HIGHWAY 42-QFN
• Manufacturer: Maxim Integrated Products
• Series: MicroDAA™r

Specifications of 73M1866B-IMR/F

• Includes: PCM Highway
• Function: Data Access Arrangement (DAA)
• Interface: PCM, Serial, SPI
• Number Of Circuits: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 42-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Power (watts): -

DS_1x66B_001
3.4.2 Call Progress Monitor
The Call Progress Monitor monitors activities on the line. The audio output contains both transmit and
receive data with a configurable level individually set by Register 10h.
Figure 10 shows the frequency response of the Call Progress Monitor Filter based upon the
characteristics of the device plus the external circuitry as shown.
All measurements are at the AOUT pin with CMVSEL=0. Note that when CMVSEL=1, the peak signal at
AOUT is increased to approximately 1.11 Vpk.
Rev. 1.6
Quantity
1
1
2
1
3
1
Figure 10: Frequency Response of the Call Progress Monitor Filter
Figure 11: Demo Board Circuit Connecting AOUT to a Speaker
AOUT
C1
C2
C3, C4
LS1
R1, R2, R3
U1
Reference
Table 14: Component Values for the Speaker Driver
C1 0.1uF
Ceramic capacitor
Ceramic capacitor
Ceramic capacitor
Sound transducer
1/8 W resistor 0603
Audio amplifier
VCC
C2
2.2uF
R1 120K
R3 120K
+
Part Description
C4
1uF
4
1
2
3
-VIN
CD
VREF1
VREF2
R2
U1
VOUT1
VOUT2
120K
NJM2135
GND
V+
5
8
6
7
0.1 μF
2.2 μF (optional)
1 μF
Speaker (Intervox)
120 kΩ
NJM2135 (New Japan Radio)
73M1866B/73M1966B Data Sheet
AT-2308
INTERVOX
VCC
LS1
C3
1uF
Part
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