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CXA2557 Datasheet(PDF) 8 Page - Sony Corporation

Part # CXA2557
Description  RF Amplifier for CD Player/CD-ROM
Download  35 Pages
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Manufacturer  SONY [Sony Corporation]
Direct Link  http://www.sony.co.jp
Logo SONY - Sony Corporation

CXA2557 Datasheet(HTML) 8 Page - Sony Corporation

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– 8 –
CXA2557R
34
MODE 1
Double-speed mode switching
pins.
n is determined by the external
resistor connected to Pin 44.
N is determined by the external
resistor connected to Pin 45
and the Pin 43 input voltage.
Pin 34 also serves as switching
pin for the tracking error
amplifier cut-off frequency and
RFO2 output ON/OFF switching
pin.
I
15k
40k
124
34
80k
15k
15k
15k
40k
80k
15k
15k
40k
80k
15k
15k
40k
80k
35
MODE 1
MODE 2
fc
L
M
H
X
L
M
H
X
× n
× 2n
× 4n
× 6n
× N
∗ X = L or M or H
MODE 1
MODE 2
fc
L
M
H
20kHz
250kHz
ON
OFF
∗ L = GND, M = VC, H = V
CC
35
MODE 2
I
33
AGC
SW
AGC/VCA switching input.
AGC when connected to VCC,
VCA when connected to GND.
I
15k
15k
20k
60k
33
32
RW SW
I
CD-ROM/RW switching input.
RW when connected to VCC,
ROM when connected to GND.
15k
15k
40k
20k
20k
20k
60k
80k
124
32
15k
15k
40k
80k
Pin
No.
Symbol
I/O
Equivalent circuit
Description


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