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參數(shù)資料
| 型號： | LA7642N |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | SECAM Format Color TV Chrominance Circuit |
| 中文描述： | SECAM格式彩色電視色度電路 |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 64K |
| 代理商： | LA7642N |
No. 5693-4/6
LA7642N
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Input a signal to which a 63-kHz modulation
has been applied to pin 14 and measure the
pin 6 R-Y amplitude Vron (V p-p) when pre-
emphasis is on. Next, turn off preemphasis,
measure the pin 6 R-Y amplitude Vroff
(V p-p), and calculate DE63R from the
following formula.
DE63R = 20
×
log (Vroff/Vron) (dB)
Input a signal to which a 250-kHz modulation
has been applied to pin 14 and measure the
pin 7 B-Y amplitude Vbon (V p-p) when pre-
emphasis is on. Next, turn off preemphasis,
measure the pin 7 B-Y amplitude Vboff
(V p-p), and calculate DE250B from the
following formula.
DE250B = 20
×
log (Vboff/Vbon) (dB)
Input a signal to which a 250-kHz modulation
has been applied to pin 14 and measure the
pin 6 R-Y amplitude Vron (V p-p) when pre-
emphasis is on. Next, turn off preemphasis,
measure the pin 6 R-Y amplitude Vroff
(V p-p), and calculate DE250R from the
following formula.
DE250R = 20
×
log (Vroff/Vron) (dB)
De-emphasis 63k R-Y
DE63R
–1.0
–2.6
–4.0
dB
De-emphasis 250k B-Y
DE250B
–4.5
–7.0
–9.5
dB
De-emphasis 250k R-Y
DE250R
–6.5
–9.0
–11.5
dB
[Sandcastle Pulse]
Apply at least 16 pulses with an amplitude of
0 V to V
CC
and then take the following
measurement. Apply a DC voltage to pin 10
and slowly increase this voltage starting at
0 V. Measure the DC voltage applied to pin
at the point the pin 3 DC voltage exceeds 3 V.
V threshold voltage
VBLK
1.0
1.3
1.6
V
Apply at least 16 pulses with an amplitude of
0 V to V
CC
and then take the following
measurement. Apply a pulse signal with a
12-μs high period and a 52-μs low period
(for a 64-μs cycle) and slowly increase the
amplitude of that signal starting at 0. Measure
the wave height of that pulse signal at the
point the pin 7 (B-Y) DC voltage exceeds
VBYBLK + 100 mV.
H threshold voltage
HBLK
2.5
3.0
3.5
V
Apply at least 16 pulses with an amplitude of
0 V to V
CC
and then take the following
measurement. Apply a pulse signal with a
12-μs high period and a 52-μs low period
(for a 64-μs cycle) and slowly increase the
amplitude of that signal starting at 0. Measure
the wave height of that pulse signal at the
point the pin 4 (IDF) DC voltage becomes
higher than it was at the point the pulse signal
wave height was 0.
BGP threshold voltage
BGP
4.5
5.0
5.5
V
[System Switching]
Slowly increase the pin 12 DC voltage from
SESWLO 0 V and measure that voltage at the point
the mode switches to a non-SECAM mode.
SECAM threshold voltage 1
1.0
1.3
1.6
V
Slowly increase the pin 12 DC voltage from
3 V and measure that voltage at the point
the mode switches to SECAM mode.
SECAM threshold voltage 2
SESWHI
3.6
3.9
4.3
V
[Killer Output: Pin 13]
Killer on output level
VKILON
Measure the pin 13 voltage when the killer
circuit is on.
0.0
0.2
0.5
V
Killer off output level
VKILOF
Measure the pin 13 voltage when the killer
circuit is off.
7.3
7.8
7.8
V
[Reference Frequency Input Block]
Measure the variation in the pin 5 DC voltage
when the 4.00-MHz input level is changed
from 200 mV p-p to 100 mV p-p.
4.00-MHz input level variations 1
V5DS4
–50
0
+50
mV
Continued from preceding page.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA7655N | 1-Chip IC for Color TV Signal Processing |
| LA76600M | Monolithic Linear IC Video Signal Y/C Separator IC |
| LA7668N | Video Signal Auto-White Processing IC |
| LA7668 | Video Signal Auto-White Processing IC |
| LA7670 | PLL type video detector for the high picture & sound quality |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA7655N | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:1-Chip IC for Color TV Signal Processing |
| LA76600M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Monolithic Linear IC Video Signal Y/C Separator IC |
| LA7668 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Video Signal Auto-White Processing IC |
| LA7668N | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Video Signal Auto-White Processing IC |
| LA7670 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL type video detector for the high picture & sound quality |
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