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PDF TDA9725 Data sheet ( Hoja de datos )
| Número de pieza | TDA9725 | |
| Descripción | Y/C automatic adjustment processor VHS standard | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
TDA9725
Y/C automatic adjustment
processor (VHS standard)
Product specification
Supersedes data of 1995 Dec 06
File under Integrated Circuits, IC02
1996 Oct 14
1 page  
Philips Semiconductors
Y/C automatic adjustment processor
(VHS standard)
Product specification
TDA9725
Table 1 Explanation of symbols in Figs 1 and 2
SYMBOL
AGCKP1
BGP
DOP
fH
fsc
HDL CCD
NLDE
NLEDTE
ROT
VXO
YNR
YLPF
DESCRIPTION
mode with shortened key pulse for AGC
burst gate pulse
dropout pulse
line frequency
subcarrier frequency (4.433619 MHz)
charged coupled device with 1H delay
non-linear de-emphasis
non-linear emphasis/detail enhancer
rotary pulse
voltage controlled XTAL oscillator
vertical noise reduction
luminance low-pass filter
PINNING
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
CF0E
6 capacitor for clamp 3
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)
FMO
10 FM supply voltage
11 FM output
PTR
12 switch (PB/TRICK/REC)
FMI 13 playback FM input
CFMA
ELS
14 storage capacitor for FM AGC
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
SYMBOL PIN
DESCRIPTION
ROT
LFVXO
LFVCO
n.c.
fsc
XTALI
XTALO
2fsc
fH/2
CTT
VCC(C)
CFT
GND(C)
ACCO
BMI
SNP
CDO
CFI
TP1
PBCO
PBCI
VCC(Y)
CVBSO
CHI
CVBSI
CAGC
SYNC
CSS
YNR
VFC
VTC
CCCD
GND(Y)
LPNC
19 rotary pulse input
20 loop filter VXO
21 loop filter VCO
22 not connected; note 1
23 fsc output
24 VXO input from crystal
25 VXO output to crystal
26 2fsc output
27 fH/2 output
28 chrominance output to tape
29 chrominance supply voltage
30 playback chrominance input from tape
31 chrominance ground
32 automatic chrominance control output
33 balanced mixer input
34 switch (SECAM/NTSC/PAL)
35 comb driver output
36 chrominance input from comb filter
37 test pin 1; note 1
38 playback chrominance output
39 playback chrominance input
40 luminance supply voltage
41 CVBS output
42 character insertion input (artificial
sync/black/white/through)
43 CVBS input
44 AGC detector capacitor
45 sync separator push-pull output
46 sync separator detector capacitor
47 YNR switch
48 video input from 1HDL CCD
49 video output to 1HDL CCD
50 storage capacitor for CCD AGC level
51 luminance ground
52 low-pass filter noise canceller
Note
1. It is recommended that this pin should be connected to
ground.
1996 Oct 14
5
5 Page 
Philips Semiconductors
Y/C automatic adjustment processor
(VHS standard)
Product specification
TDA9725
SYMBOL
PARAMETER
CONDITIONS
MIN.
Switch: PB/TRICK/REC (pin 12)
RI internal resistance to
ground
VPB voltage range for active
playback mode
VTR voltage range for active
trick mode
VREC
voltage range for active
record mode
40
3.5
1.75
0
Playback FM input (pin 13)
V13
Vi(p-p)
DC voltage
input voltage level
(peak-to-peak value)
FM AGC active
FM AGC not active; pin 14 HIGH
1.7
63
−
ViBO(p-p)
boundary input voltage
(peak-to-peak value)
fi = 3.8 MHz; pin 14 HIGH
10
GDOC
DOC on level
Vi = 350 mV (p-p); fi = 3.8 MHz; −18
pins 7 and 14 HIGH
∆Ghys
DOC on/off hysteresis
Vi = 350 mV (p-p); fi = 3.8 MHz; 1
pins 7 and 14 HIGH
GEon
envelope detector
switch-on level
playback mode;
0 dB = Vi = 350 mV (p-p);
fi = 3.8 MHz; pin 14 HIGH
−13
Storage capacitor for FM AGC (pin 14; playback mode)
V14 DC voltage
DC input voltage
AGC on
AGC off
2.6
4.3
Switch LP C*/LP/SP at PAL; EP/LP/SP at NTSC (pin 15)
RI internal resistance to
ground
VC input voltage for active C* PAL
(conjugated complex
chrominance signal)
VE input voltage for active EP NTSC
VL input voltage for active LP
VS input voltage for active SP
40
3.5
3.5
1.75
0
TYP.
50
−
−
−
2.2
200
350
−
−15
3
−10
3.1
−
50
−
−
−
−
MAX.
60
5
3
1.25
2.7
632
−
1 000
−12
5
−7
3.6
5.0
60
5
5
3
1.25
UNIT
kΩ
V
V
V
V
mV
mV
mV
dB
dB
dB
V
V
kΩ
V
V
V
V
1996 Oct 14
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TDA9725.PDF ] | |
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