la9247t Sanyo Semiconductor Corporation, la9247t Datasheet - Page 4

• Manufacturer Part Number: la9247t
• Description: Cd-rom Digital Servo Rf Ic
• Manufacturer: Sanyo Semiconductor Corporation

Pin Functions
Usage Notes
The signal levels of the inputs to the A (pin 7), B (pin 8), C (pin 9), D (pin 10), E (pin 13), and F (pin 14) pins must be set
up to be above the reference voltage (VREF).
Pin No.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
1
2
3
4
5
6
7
8
9
Symbol
VREF2
REFI2
RFSM
RFAO
GND1
V CC 3
VREF
LDON
V CC 2
GND2
RHLD
V CC 1
TBAL
FBAL
REFL
RFIN
REFI
SGC
GHS
BHC
PHC
LDD
CSS
EQS
LDS
BH
PH
TS
TE
FE
C
D
A
B
E
F
I/O
O
O
O
O
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
RF AGC detection bottom hold capacitor connection
RF AGC detection peak hold capacitor connection
RF amplifier output
RF signal system ground
Pickup voltage output connection. Inputs the RF addition signal from the pickup.
3.3V system V CC
Pickup voltage output connection. Generates the FE, REFL, and CSS signals.
Pickup voltage output connection. Generates the FE, REFL, and CSS signals.
Pickup voltage output connection. Generates the FE, REFL, and CSS signals.
Pickup voltage output connection. Generates the FE, REFL, and CSS signals.
Reference voltage bypass capacitor connection
Reference voltage output (Vref1 = 2.5V)
Pickup voltage output connection. Generates the TE and TS signals.
Pickup voltage output connection. Generates the TE and TS signals.
APC circuit output
APC circuit input
Reference voltage output (Vref2 = 1.65V)
Reference voltage bypass capacitor connection
Servo gain control (FE, TE, TS, and REFL signals)
TE balance adjustment (TE and TS signals)
FE balance adjustment (FE signal)
Laser on/off, laser power increase control
Servo signal system V CC (5V)
RF and servo signal gain switch (0dB or +14dB)
TS signal (used for the TES signal) output (to the DSP)
TE signal output (to the DSP)
Center servo signal output (to the DSP)
FE signal output (to the DSP)
Reflection signal output (to the DSP)
RF equalizer and PH detection time constant control
Servo signal system ground
RF hold control
EFM signal output (to the DSP)
RF signal system V CC (5V)
RF bottom hold signal output (to the DSP)
RF peak hold signal output (to the DSP)
LA9247T
Description
No.N8219-4/6