MC33219A Datasheet, PDF (7/28 Pages) Motorola, Inc – Voice Switched Speakerphone

Freescale SMeCm33i2c1o9Anductor, Inc.
Figure 2. MC33219A Block Diagram and Test Circuit
From
Microphone
0.47
3.0 k
300 k
MCO
21
Transmit Output
To 2–4 Wire Converter
5.1 k
0.1
TAI
TAO
22
23
4.7 k 0.1
47
R1
1.0
VCC
100 k
XDI
CP2 CPT TLI
2
1
3
4
Normal
20
MCI
VB
Mute ₁₈
Mute
Volume ^VB
Control
VLC 19
(See
Figure 28)
0.1
MC33219A
VB
Tx Attenuator
VCC _VB
AGC
Tx
BNM
VB
5 TLO
1.0
Attenuator Control Circuit
Tx–Rx Comp.
7 ^CT
15 k ¹⁵
Disable ₈
Normal
VCC
CD
24
Bias
100
13
GND
VCC
VB
Rx
BNM
10
12
11 14
47
CPR RLO RLI RAO
1.0
100 k
Dial Tone
Detector
VTH
Rx Attenuator
15
16
RAI
RXO
5.1 k 0.1
R2
MC34119
Speaker
Amplifier
6 VB
100
17 RXI
VB
10 k
10 k
0.1
Receive Input
From 2–4 Wire
Converter
NOTES: 1. All capacitors are in µF unless otherwise noted.
2. Values shown are suggested initial values only. See Applications Information for circuit adjustments.
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