MC33219A Datasheet, PDF (10/28 Pages) Motorola, Inc – Voice Switched Speakerphone

Freescale SMeCm33i2c1o9Anductor, Inc.
Figure 15. Microphone Amplifier Muting
versus Feedback Resistor
100
80
60
40
2.7 V ≤ VCC ≤ 6.5 V
20
0
1.0 k
10 k
100 k 300 k
RF, FEEDBACK RESISTOR (Ω)
Figure 16. VLC Input Current (Pin 19)
0
–2.0
–4.0
–6.0
–8.0
2.7 V ≤ VCC ≤ 6.5 V
–10
– 1.4 –1.2 –1.0 – 0.8 – 0.6 – 0.4 – 0.2
0
VLC VOLTAGE, WITH RESPECT TO VB (V)
Figure 17. Idle
TAI
Input
TAO
Output
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ₂₀ÎÎÎÎÎÎÎÎÎ_0mVÎÎÎÎÎÎÎÎÎ_r1m.0s,sÎÎÎÎÎÎÎÎÎ_1.0kÎÎÎÎÎÎÎÎÎ_Hz ÎÎÎÎÎÎÎÎÎ₃₇ÎÎÎÎÎÎÎÎÎ_mVrmÎÎÎÎÎÎÎÎÎ_s ÎÎÎÎÎÎÎÎÎ
420 mVrms
30 ms
36 mV
CPT
360 ms
Idle
CT
Tx
100 mV
225 ms Time Constant
170 mV
TLO
Transmit Timing
5.0 mVrms
85 ms
270 mV
120 mV
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
NOTE: Refer to Figure 2 for component values. Timing and output amplitudes shown are nominal, and are for the indicated input signal and
component values. Actual timing and outputs will vary with the application.
10
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