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參數(shù)資料
| 型號： | MAX4455 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Triple Differential Transceivers 20-SOIC -40 to 85 |
| 中文描述： | 任意圖形隨屏顯示視頻發(fā)生器 |
| 文件頁數(shù)： | 17/30頁 |
| 文件大小： | 663K |
| 代理商： | MAX4455 |
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M
Arbitrary Graphics On-Screen Display
Video Generator
______________________________________________________________________________________
17
The result of writing OSD over the vertical blanking
interval is a rolling picture that the display monitor can-
not sync to, and the MAX4455 loss-of-sync flag is set
for that channel. Reestablish sync by blanking the
channel
’
s OSD for at least one full video frame period,
allowing the MAX4455
’
s sync timing circuitry to correct-
ly sense the new video source
’
s timing, and reset the
LOS flag.
Optimizing OSDFILL Load Termination
and R
RSET
The MAX4455 provides standard 100 IRE (0.714V) full-
scale OSDFILL_ output levels with R
RSET
= 11.75k
and
OSDFILL_ terminated with R
OSDFILL_
= 75
to AGND.
The MAX4455 OSDFILL_ outputs can drive as high as
1.5V by selecting a lower R
RSET
value, or increasing the
value of R
OSDFILL
, or a combination of both. OSDFILL
output levels higher than 0.714V can have increased dis-
tortion and degraded linearity (see the
OSDFILL_
Reference Voltage (RSET)
section).
SDRAM Memory Selection
The MAX4455 EV kit uses the Micron MT48LC1M16TG-
7S SDRAM. The MAX4455 has not been tested with, but
is designed to operate with the following SDRAMS:
Micron MT48LC1M16A1-8 or faster, VIS VG3617161DT-8
or faster, Hyundai HY57V161610D or HY57V161610C,
Mitsubishi M2V64S40DTP, Micron MT48LC4M16A2, and
Hitachi HM5264165F.
Anti-Aliasing and Flicker
The MAX4455 is a high-resolution graphics system
capable of accurately displaying a single pixel line. A
line with the height of one pixel, by definition, occurs
only on one of the two interlaced fields that make up the
standard interlaced video signal. Since the interlaced
system has a frame rate of about 60Hz, the field rate is
half of this (30Hz). Any object occurring only on one
field is displayed at a 30Hz rate, resulting in a flickering
image. Any signal displayed at less than a 50Hz rate is
perceived to visibly flicker. The slower the display rate
is, the higher the perceived flicker.
The amount of flicker in a one-pixel-high horizontal line
is dependent on the length of the line. The flicker asso-
ciated with very short lines that are part of another
shape are typically very minimal. For example, the flick-
er of the legs of the letter F is almost imperceptible. At
the other extreme, a one-pixel horizontal line that spans
the width of a display exhibits flicker that can be very
noticeable.
The perceived flicker due to thin horizontal lines can be
minimized by making the line thicker or by using anti-
aliasing techniques. For the best results, these two
MAX4258
FB
TO MAX4455
VIDIN_ INPUT
OSDFILL_
(FROM MAX4455)
SWITCH
MATRIX
+1
IN0
OUT1
IN1
+1
+5V
510
510
75
-5V
AO
OSDKEY_
(FROM MAX4455)
CAMERA
Figure 8. Interfacing MAX4455 with a Fast Mux Switch
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX4455ECQ | Triple Differential Transceivers 20-SOIC -40 to 85 |
| MAX445CPG | Triple Differential Transceivers 20-SSOP -40 to 85 |
| MAX4504EPA | Low-Voltage, Dual-Supply, SPST, CMOS Analog Switches |
| MAX4504ESA | Low-Voltage, Dual-Supply, SPST, CMOS Analog Switches |
| MAX4504EUK | Low-Voltage, Dual-Supply, SPST, CMOS Analog Switches |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4455ECQ | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX4455ECQ+D | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX4455ECQ+TD | 功能描述:視頻開關(guān) IC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX4455ECQ-T | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX4455EVKIT | 制造商:Maxim Integrated Products 功能描述:ARBITRARY GRAPHICS ON-SCREEN DISPLAY VIDEO GE - Bulk |
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