Datasheet

MC33411A/B
12
MOTOROLA RF/IF DEVICE DATA
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PIN FUNCTION DESCRIPTION (continued)
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Description
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Description
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Symbol/Type
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Pin
22 C In
(Input)
C In
22
V
CC
Audio
12.5 k
V
B
C In is the compressor input. This pin is internally
biased and has an input impedance of 12.5 kΩ.
C In must be ac–coupled.
23 V
CC
Audio
(Input)
23
Audio
Section,
Filters, A/D
Converters,
Data Slicer
V
CC
0.0110
Supply input for the audio section, filters, A/D
Converters, and Data Slicer. Allowable range is 2.7
to 5.5 V. Good bypassing is required.
24 MCO
(Output)
MCO
24
Audio
V
CC
Output of the Microphone amplifier. Maximum
output swing is ≈3.0 V
pp
for V
CC
≥ 3.0 V.
Maximum output current is >1.0 mA peak.
25 MCI
(Input)
MCI
25
V
CC
Audio
2.5 µA
V
B
Inverting input of the microphone amplifier. Gain
and frequency response are set with external
resistors and capacitors from this pin to the audio
source and to MCO.
26 VAG
(Output)
VAG
26
0.1
µF
30 k
Audio
V
CC
Analog ground for the audio section filters. VAG is
equal to VB and is buffered from VB. Maximum
current which can be sourced from this pin is
500 µA.
27 V
B
(Output)
V
B
27
4.7
µF
30 k
Audio
V
CC
240
An internal 1.5 V reference for several sections.
This voltage is adjustable with bits 3/20–17.
Maximum source current is 100 µA. PSRR, noise
and crosstalk depends on the external capacitor.
28 V
CC
PA
(Input)
28
Audio
Power
V
CC
0.0110
Supply pin for the power amplifier outputs.
Allowable range is 2.7 to 5.5 V. Good bypassing is
required.
NOTE: 1. All V
CC
pins must be within ±0.5 V of each other.
ARCHIVE INFORMATION
ARCHIVE INFORMATION
Fr
eescale S
emiconduct
or
, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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