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TDA9725 Datenblatt(PDF) 5 Page - NXP Semiconductors

Teilenummer TDA9725
Bauteilbeschribung  Y/C automatic adjustment processor VHS standard
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Hersteller  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA9725 Datenblatt(HTML) 5 Page - NXP Semiconductors

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1996 Oct 14
5
Philips Semiconductors
Product specification
Y/C automatic adjustment processor
(VHS standard)
TDA9725
Table 1
Explanation of symbols in Figs 1 and 2
PINNING
SYMBOL
DESCRIPTION
AGCKP1
mode with shortened key pulse for AGC
BGP
burst gate pulse
DOP
dropout pulse
fH
line frequency
fsc
subcarrier frequency (4.433619 MHz)
HDL CCD
charged coupled device with 1H delay
NLDE
non-linear de-emphasis
NLEDTE
non-linear emphasis/detail enhancer
ROT
rotary pulse
VXO
voltage controlled XTAL oscillator
YNR
vertical noise reduction
YLPF
luminance low-pass filter
SYMBOL PIN
DESCRIPTION
PCTL
1
picture control/edit switch input
CDEV
2
deviation/playback AGC detector input
TP2
3
test pin 2/correlation detector output
NFB
4
negative feedback input of main
emphasis
MEO
5
main emphasis output/white
clip/modulator input/SQPB selector
CCLP3
6
capacitor for clamp 3
CF0E
7
storage capacitor for f0 processor
(record)/envelope detector (playback)
MDEC
8
main de-emphasis output
MDEB
9
main de-emphasis and peaking output
VCC(FM)
10
FM supply voltage
FMO
11
FM output
PTR
12
switch (PB/TRICK/REC)
FMI
13
playback FM input
CFMA
14
storage capacitor for FM AGC
ELS
15
PAL: switch (LP C*/LP/SP); NTSC:
switch (EP/LP/SP)
CK
16
colour killer terminal
FCO
17
frequency correction output
BGP
18
burst gate pulse output
Note
1. It is recommended that this pin should be connected to
ground.
ROT
19
rotary pulse input
LFVXO
20
loop filter VXO
LFVCO
21
loop filter VCO
n.c.
22
not connected; note 1
fsc
23
fsc output
XTALI
24
VXO input from crystal
XTALO
25
VXO output to crystal
2fsc
26
2fsc output
fH/2
27
fH/2 output
CTT
28
chrominance output to tape
VCC(C)
29
chrominance supply voltage
CFT
30
playback chrominance input from tape
GND(C)
31
chrominance ground
ACCO
32
automatic chrominance control output
BMI
33
balanced mixer input
SNP
34
switch (SECAM/NTSC/PAL)
CDO
35
comb driver output
CFI
36
chrominance input from comb filter
TP1
37
test pin 1; note 1
PBCO
38
playback chrominance output
PBCI
39
playback chrominance input
VCC(Y)
40
luminance supply voltage
CVBSO
41
CVBS output
CHI
42
character insertion input (artificial
sync/black/white/through)
CVBSI
43
CVBS input
CAGC
44
AGC detector capacitor
SYNC
45
sync separator push-pull output
CSS
46
sync separator detector capacitor
YNR
47
YNR switch
VFC
48
video input from 1HDL CCD
VTC
49
video output to 1HDL CCD
CCCD
50
storage capacitor for CCD AGC level
GND(Y)
51
luminance ground
LPNC
52
low-pass filter noise canceller
SYMBOL PIN
DESCRIPTION


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