CXA1518Q/S
EIAJ Sound Multiplexing Decoder
Description
The CXA1518Q/S are bipolar ICs designed for
EIAJ TV sound multiplexing decoders. These ICs
provide various functions including sound
multiplexing demodulation, broadcast mode
discrimination (stereo/bilingual discrimination
display), mode display, and muting.
Features
•
External parts greatly reduced with a built-in active
filter.
•
Count down can be used for broadcast mode
discrimination so that adjustment for discrimination
system (Q-OSC) is not required.
•
Output level of 380 mVrms (1 kHz, MONO, 100 %)
•
Forced monaural operates with both stereo and
bilingual broadcasts.
•
Built-in digital facsimile interference elimination
filter.
•
Low supply voltage (V
CC
=5 V)
•
The pin configuration of the CXA1518S is identical
to that of the CXA1138AS.
Applications
•
Color TVs
•
Hi-Fi VCRs
•
Liquid crystal TVs
Structure
Bipolar silicon monolithic IC
CXA1518Q
32 pin QFP (Plastic)
CXA1518S
22 pin SDIP (Plastic)
Absolute Maximum Ratings
(Ta=25 °C)
[Pin numbers shown are for the CXA1518S.]
•
Supply voltage
•
Input signal
(Pin 6)
•
Control voltage
(Pins 12, 13, 14)
V
CC
V
IS
V
IC
10
0.6
V
CC
–20 to +75
–65 to +150
900
470
•
LED drive current
Operating Voltage
6.0 to 4.5
V
Iled
10
V
Vp-p
V
°C
°C
•
Operating temperature Topr
•
Storage temperature
Tstg
•
Allowable power dissipation
P
D
mW
(SDIP)
mW
(QFP)
mA
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
—1—
E92604A79-TE
CXA1518Q/S
Pin Description
Pin No.
Symbol
SDIP QFP
1
29
GND
(Ta=25 °C, V
CC
=5 V)
Pin
voltage
0
Equivalent circuit
Pin numbers in brackets are for the CXA1518Q.
Description
GND
V
CC
V
CC
10k
2
30
FLAJ
2.4 V
147
2
(30)
40µ
GND
80k
Filter adjustment pin
V
CC
54k
1.5k
V
CC
14k
14k
3
3
31
REFL
2.5 V
(31)
Connects noise elimination filter of internal
reference power supply.
20k
4
32
V
CC
—
V
CC
147
90k
30k
80µ
2.5V
GND
Power supply pin
6
3
MPXIN
2.5 V
6
(3)
25k
Sound multiplexing signal input.
Standard input level=70 mVrms
(MONO 100 %)
V
CC
1k
147
8
(7)
40k
40k
V
CC
8
7
CUBI
2.4 V
11k
2k
2.5V
Connects bias capacitor for Cue pulse
generator.
—3—
CXA1518Q/S
Pin No.
Symbol
SDIP QFP
9
9
LEDST
Pin
voltage
Equivalent circuit
V
CC
V
CC
V
CC
147
9
147
10
Description
10
10
LEDSU
—
147
11
Connects the LEDs to display each mode.
Pin 9: Stereo
Pin 10: Sub
Pin 11: Main
64k
16k
GND
64k
64k
16k
11
11
LEDM
16k
V
CC
147 16k
12
(14)
2.4V
8k
16k
V
CC
20µA
12
14
MODE
—
Switches the output mode with the DC
voltage during bilingual broadcasting.
GND
V
CC
8k
V
CC
13
15
MUTE
—
13
(15)
147 32k
160k
GND
Output mute pin.
When set to high, only DC is output from
Pins 15, 16 and 17 (Pins 17, 18 and 20).
V
CC
147 1k
14
(16)
80k
V
CC
40µ
14
16
FOMO
—
GND
Forced monaural pin.
When set to high, monaural function
(main) is forcibly set regardless of stereo
and bilingual broadcasts and LEDs are
extinguished.
V
CC
V
CC
147
14k
15
17
MOUT
2.4 V
15
(17)
32k
32k
GND
Main signal output pin.
Always outputs the main signal component
regardless of the broadcast mode.
—4—
CXA1518Q/S
Pin No.
Symbol
SDIP QFP
Pin
voltage
Equivalent circuit
Description
V
CC
V
CC
147
14k
16
18
ROUT
2.4 V
16
(18)
R-ch output pin
32k
32k
GND
V
CC
V
CC
147
14k
L-ch output pin.
32k
32k
GND
17
20
LOUT
2.4 V
17
(20)
During “TEST”, outputs the Cue signal
component passed through the Cue BPF.
V
CC
V
CC
V
CC
147
18
22
MCIN
2.5 V
19
(24)
18
147
20P
147
147
16k
160µ
80µ
GND
Connects DC cut capacitor of the main
signal.
19
24
MCOUT
1.7 V
(22)
2.5V 80µ
20
25
SCIN
2.5 V
21
(26)
20
(25)
V
CC
V
CC
147
147
V
CC
18p
147
5k
147
12k
2.5V
160µA
80µA
80µA
GND
Connects DC cut capacitor of the sub
signal.
21
26
SCOUT
1.7 V
V
CC
80µ
V
CC
20µ
16k
15k
1k
2.5V
8k
1.4V
64k
8k
147
22
28
SUBI
2.4 V
22
(28)
147
Connects bias capacitor of the sub FM
detector.
Grounding this pin enables the TEST
mode for filter adjustment.
—5—
京公网安备 11010802033920号
EEWORLD
