TEA6880 データシートの表示（PDF） - Philips Electronics
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TEA6880 Datasheet PDF : 88 Pages
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Philips Semiconductors
Up-level Car radio Analog Signal
Processor (CASP)
Product specification
TEA6880H
5 BLOCK DIAGRAM
handbook, full pagewidth
fref
(75.4 kHz)
audio
from
processing hold
NICE 100 nF
(for RDS update) (AFSAMPLE)
10 nF
470 kΩ
68 kΩ
100 nF
6.8 nF
6.8 nF
100 100
nF kΩ
22
nF
AM 33 nF 220 kΩ 52
mono
input
AMNBIN
53
220 nF 54
10 nF
55
MPXRDS
10 µF
56
RIN 182 kΩ
220 nF 100 kΩ 82 kΩ 57
MPX
input
33 pF
10 nF 58
3.3 nF 59
3.3 nF 60
2.7 nF 61
2.7 nF 62
4.7 nF 63
4.7 nF 64
51
50
49 48 47
46
120 kHz
HIGH-PASS
AMPLIFIER
AGC
PULSE
SEPARATOR
trigger sensitivity
NOISE
&
INTERFERENCE
DETECTOR
FM
PULSE
FORMER
60 kHz
HIGH-PASS
&
USN
DETECTOR
sensitivity
pilot
STEREO
ind.
DECODER
PLL
19 kHz
38 kHz
INPUT BUFFER
&
80 kHz
LOW-PASS
sep.adj.
mute slope
mute start
V/I
CONVERTER
start/
slope
TEA6880H
MATRIX
&
SOFT-MUTE
38 kHz
SNC
FM BUFFER
&
FM NB-GATES
HCC
50/75 µs
DE-EMPHASIS
&
AM STEREO INPUT
de-emphasis
switch
STEREO
DECODER
OUTPUT
start/
slope
BUS
LEVEL
ADC
(6-BIT)
bus controls
I2C-BUS
&
CONTROL LOGIC
detector hold
detector reset
test
12
3
45 6
22 kΩ
22 kΩ
I2C-bus
to NICE
from AM/FM
level detector
I2C-bus
VDD(I2C-bus)
LEVEL
INPUT
BUFFER
20 kHz
BAND-PASS
&
AMWB
DETECTOR
sensitivity
45
44
AM
GATE
test
AVERAGE
DETECTOR
(MUTE/HCC)
43
A
B
PEAK
DETECTOR
(SNC)
detector
hold
PEAK
DETECTOR
(WBAM2)
PEAK
DETECTOR
(USN2)
AVERAGE
DETECTOR
(WBAM1)
C
D
detector
reset
E
detector
hold
AVERAGE
DETECTOR
(USN1)
7
10 nF
F
G
H
MHB427
Fig.1 Block diagram (continued in Fig.2).
2000 May 08
5
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