Ver.4
NJW1303
-1-
SYNCHRONOUS SEPARATOR WITH COUNT DOWN
T
TT
TGENERAL DESCRIPTION T
TT
TPACKAGE OUTLINE
The NJW1303 is a synchronous separator performs
Horizontal and Vertical synchronous signal from composit video
signals. It contains count down circuit for H,V keeping high sync
separation in the weak signal. It is suitable for car navigation and
LCD TV.
T
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TFEATURES
§Operating Voltage V+ =2.7V to 5.3V
§Operating Current 5mA typ. at V+ =5V
§Output for HD,VD,C sync
§unnecessary adjustment of oscillation frequency for internal count down circuit
§Internal BGP
§Bi-CMOS Technology
§Package Outline SSOP14
T
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TPIN FUNCTION, BLOCK DIAGLAM
32fH VCO
V count down
Phase Det
V Sync Sep
VS
Sync IN
GND DIGREF
C Sync OUT
VD
HD
LPF
H count down
BGP Generator BGP
Vcc
Vcc
VCO Out VCO
Filter 2
VCO
Filter 1
14
12
+
++
+
Sync Sep
Reg
1
2
910 11
3 13 6
4
8
5
SW
7
NJW1303V
NJW1303
Ver.4
-2-
T
TT
T ABSOL UTE MAXIMUM RATINGS (Ta=25°
°°
°C)
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage V+ 8.0 V
Power Dissipation PD 300 mW
Operating Temperature Range Topr -40 to +85 °C
Storage Temperature Tstg -40 to +125 °C
T
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T RECOMMENDED OPERATING CONDITION
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage Vopr 2.7 to 5.3 V
T
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T ELECTRICAL CHARACTERISTICS ( V
+=5V, Ta=25°C)
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Operating Current ICC No input signal 3.3 5.0 7.5 mA
AFC Free Run Frequency fOH
Measure the Input connect to GND
under 300ohm 15.654 15.734 15.814 kHz
∆fHL1 Miss lock to high frequency +600 +700 -
AFC Lock Range ∆fHL2 Miss lock to Low frequency - -700 -600 Hz
∆fHP1 Capture from high frequency +600 +700 -
AFC Capture Range ∆fHP2 Capture from Low frequency - -700 -600 Hz
Horizontal Output
Pulse Width
PwHD
3.5 3.9 4.3 us
Horizontal Output Delay TpDH 0.48 0.64 0.8 us
Horizontal Output
Saturation Level VoLH
-0.2 0.1 0.3 V
Horizontal AFC Keep
Limit Input VINGM
Input is Color Bar of 1Vpp,and
Horizontal signal of 4.8 uS pulth width.
ATT less of miss lock Sync at valuable
of input signal level.
- - -20 dB
BGP Pulse Width PwGP 3.1 3.6 4.1 us
BGP Delay TpDG
0.35 0.6 0.85 us
BGP Limit Input VMINBGP
Input is Color Bar of 1Vpp,and
Horizontal signal of 4.8 uS pulth width.
A
TT less of changeable BGP output a
t
less of input signal level.
- - -17 dB
0V
4.8us 286mVpp
Input Signal
TpDG
PwGP
Output Signal
*point1
Input Signal
4.8us 286mVpp
TpDH
PwHD
Output Signal
VoLH
0V
*point1
Ver.4
NJW1303
-3-
T ELECTRICAL CHARACTERISTICS ( V
+=5V, Ta=25°C)
PARAMETER SYMBOLS TEST CONDITIONS MIN. TYP. MAX. UNIT
Vertical Output
Pulse Width PwVD 2.5 3.0 3.5 H
Vertical Output Delay TpVD
*point
0.47 0.66 0.85 H
Vertical Output
Saturation Level VLVD Low level of Vertical output - 0.2 0.5 V
C.SYNC Output Delay TpCS 0.32 0.5 0.64 us
C.SYNC Output
Saturation Voltage VLCS - 0.2 0.5 V
*point
*When measure of pulse timing
50% 50%
50% 50%
Signal
Equivalent Palse
VD Output
Input Signal
TpVD
Vertical Sync.Pulse Equivalent Palse
NJW1303
Ver.4
-4-
TTEST CIRCUIT
*1: CSBLA503KE5ZF10 at MURATA
*2: NTSC/PAL SW
NTSC : GND
PAL :Vcc,and 9 to10pin is 360 ohm, 10 to 11pin is 2 k ohm
■
■■
■APPLICATION NOTES
• The ratio of the vertical synchronous pulse term and the vertical synchronous signal cycle
Please adjust following expression.
The vertical synchronous signal cycle / The vertical synchronous pulse term ≥ 75 (see following figure)
• The pulse width of horizontal synchronous signal shall be set 3.7 to 5.7µ.s
1kΩ
TPV
( V CC)
1
2
3
4
5
6
78
9
10
11
12
13
14
*1
390Ω
1.8kΩ
3kΩ4.7u
F
15000p
F
1u
F
1u
F
150p
F
1000p
F
CSY NCOU
T
SY NCIN
VC
C
V
D
H
D
DIGRE
F
S
W
VS
GN
D
LP
F
VCOFIL1
VCOFIL2
VCOOU
T
BG
P
330p
F
360Ω
910kΩ
*2
100u
F
68000p
F
Vertical S
y
nchronous Si
g
nal c
y
cle
Vertical S
y
nchronous Pulse term Vertical S
y
nchronous Pulse term
Ver.4
NJW1303
-5-
T EQUIVALENT CIRCUIT
No. NAME INSIDE EQUIVALENT CIRCUIT No. NAME INSIDE EQUIVALENT CIRCUIT
1 Csync.
Out
10 VCO
Filter 2
2 Sync.
In
11 VCO
Filter 1
3 Vcc
12 LPF
4
5
7
8
VD
HD
SW
BGP
6
13
DIGREF
GND
9 VCO
Out
14 VS
VCC
GND
3k
3k20k
VCC
GND
200
VCC
GND
VCC
GND
10k
VCC
GND
DIGREF
VCC
200
VCC
200
GND
VCC
GND
200
NJW1303
Ver.4
-6-
MEMO
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
