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TA2157FN Datasheet(PDF) 3 Page - Toshiba Semiconductor

Part # TA2157FN
Description  Digital Servo Head Amp for CD System
PDF  14 Pages
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Manufacturer  TOSHIBA [Toshiba Semiconductor]
Direct Link  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TA2157FN Datasheet(HTML) 3 Page - Toshiba Semiconductor

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TA2157F/FN
2002-11-21
3
Pin Function
Pin
No.
Symbol
I/O
Function Description
Internal Circuit
1
VCC
¾ 3.3 V power supply pin
¾
2
FNI
I
Main-beam amp input pin
3
FPI
I
Main-beam amp input pin
4
TPI
I
Sub-beam amp input pin
5
TNI
I
Sub-beam amp input pin
6
MDI
I
Monitor photo diode amp input pin
7
LDO
O
Laser diode amp output pin
8
SEL
I
APC circuit ON/OFF control signal, laser diode
(LDO) control signal input or bottom/peak
detection frequency change pin.
SEL
APC
Circuit
LDO
GND
OFF
Connected to VCC
through 1 k
W resistor
HiZ
ON
Control signal output
VCC
ON
Control signal output
2
3
22 k
W
1 k
W
VC
4
5
100
W
VC
6
1.75 k
W
14 k
W
7
1 k
W
50 k
W
ON/OFF
ON: LD-OFF
OFF: LD-ON
8
30 k
W



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