TDA8808T View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
TDA8808T Datasheet PDF : 22 Pages
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Philips Semiconductors
Photo diode signal processor for compact
disc players
Product specification
TDA8808T
TDA8808AT
Pin functions
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
23, 22
24, 25
26
27
28
MNEMONIC
DESCRIPTION
GCHF
Gain control input of HF amplifier. Current output from HF amplitude detector
VP
HFout
Positive supply voltage
HF amplifier and equalizer voltage output
DET
HF detector voltage input
Sc
Starting up capacitor input
Si/RD
On/off control (start input); ready signal output (starting up procedure successful)
Beq
Equalizer reference current input
Bgc
DC and LF gain control reference current input
FOC START Focus normalizing circuit starting current
PLLH
PLL on hold output
TL
Track loss output
DODS
Drop out detector suppression input
Vext
TDA8808T
Negative supply connection for FE and FElag output stage; also
substrate connection
TDA8808AT
Positive supply connection for FE and FElag output stage
LPF
Low pass filter for Iret, used in track loss (TL) detector and LF gain control
FE
Current output of normalized, switched focus error signal
FElag
Current output of switched focus error signal, intended for lag network.
LO
Laser amplifier current output
LM
Laser monitor diode input
GCLF
Gain control input for AC and LF amplifiers. Current output from LF amplitude detector
Re2
Summation of amplified currents from D3 and D4
Re1
Summation of amplified currents from D1 and D2
D1, D2
Current inputs to DC and LF photo diode amplifier
D3, D4
Current inputs to DC and LF photo diode amplifier
HFin
Current input to HF amplifier
GND
Ground connection of device: also substrate connection for TDA8808AT
DEC
Decoupling input (internal bypass)
November 1987
5
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