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參數(shù)資料
| 型號： | BH7236AF |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | Color TV Signal Encoder |
| 中文描述： | 彩色電視信號編碼器 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 71K |
| 代理商： | BH7236AF |
5
Multimedia ICs
Measurement circuit
BH7236AF
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
CLAMP
75
CLAMP
CLAMP
75
75
F
P
S
MATRIX
B
R
F
75
Y
M
B
D
75
75
S
M
BFP GEN.
BFP
B
Analog R signal
Color subcarrier
SYNC
OUT
measurement
point
R
OUT
measurement
point
220
μ
+
75
75
+
220
μ
+
220
μ
+
220
μ
75
75
75
75
75
75
V
CC
220
μ
75
75
+
75
75
0.47
μ
G
OUT
measurement
point
B
OUT
measurement
point
V
OUT
measurement
point
Y
OUT
measurement
point
C
OUT
measurement
point
Analog G signal
Analog B signal
SYNC
V
CC
Composite SYNCH
V
CC
SYNC
SYNC
SYNC
NT / PAL selector
BGPOUT
N.C.
N.C.
N.C.
N.C.
0.1
μ
0.1
μ
0.1
μ
Circuit operation
(1) SYNCIN is for composite synch input. During low
input, the synchronization signal is output to YOUT,
V
OUT
and SYNC
OUT
. This signal also controls the timing
of the pedestal clamps of R
IN
, GIN and B
IN
. (The
pedestal levels of R
IN
, G
IN
and B
IN
are kept constant by
charging an attached capacitor.)
(2) SCIN is for color subcarrier input. Set input to a
pulse wave or sine wave (3.579545MHz for NTSC and
4.433619MHz for PAL).
(3) NT / PAL is the NTSC / PAL selector pin, and con-
nects to Vcc when set to NTSC and to GND when set
to PAL. Chroma phase is switched for each line when
the IC is set to PAL.
(4) Using the composite synch and subcarrier inputs,
the IC generates a burst flag signal, according to which
a burst signal is output to C
OUT
and V
OUT
. The half-H
killer presents the burst signal from being output at the
wrong points.
(5) PAL chroma phases are also switched at a regular
cycle (1H) during vertical synchronization.
(6) C
OUT
and Y
OUT
are for output of chroma signals and
luminosity signals, respectively. Because the chroma
signal and luminosity signals can be output separately,
the IC can be adapted for S pins. Each has a 75
dri-
ver.
(7) V
OUT
is for color TV signal output, and has an inter-
nal 75
driver.
(8) R
OUT
, G
OUT
and B
OUT
are for analog RGB signal out-
put, and have an internal 75
driver.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BH7236AF_1 | 制造商:ROHM 制造商全稱:Rohm 功能描述:Color TV signal encoder |
| BH7236AF-E2 | 功能描述:視頻 IC ENCODER RGB FOR NTSC RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| BH7240 | 制造商:ROHM 制造商全稱:Rohm 功能描述:Color TV signal encoder |
| BH7240AKV | 制造商:ROHM 制造商全稱:Rohm 功能描述:Color TV signal encoder |
| BH7240AKV_1 | 制造商:ROHM 制造商全稱:Rohm 功能描述:Color TV signal encoder |
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