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參數(shù)資料
| 型號： | MAX4356 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 16x16 Nonblocking Video Crosspoint Switch with On-Screen Display Insertion and I/O Buffers |
| 中文描述： | 16 x 16、無阻塞視頻交叉點(diǎn)開關(guān)，帶有屏幕顯示插入及輸入/輸出緩沖器 |
| 文件頁數(shù)： | 36/41頁 |
| 文件大小： | 853K |
| 代理商： | MAX4356 |
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M
16 x 16 Nonbloc king Video Crosspoint S witc h
with On-S c reen Display Insertion and I/O Buffers
36
______________________________________________________________________________________
crosspoint devices to reduce the number of outputs
that need to be wired together (see Figure 7).
In Figure 7, the additional devices are placed in a sec-
ond bank to multiplex the signals. This reduces the
number of wired-OR connections. Another solution is to
put a small resistor in series with the output before the
capacitive load to limit excessive ringing and oscilla-
tions. Figure 8 shows the graph of the Optimal Isolation
Resistor vs. Capacitive Load. A lowpass filter is created
from the series resistor and parasitic capacitance to
ground. A single R-C do not affect the performance at
video frequencies, but in a very large system there may
be many R-Cs cascaded in series. The cumulative
effect is a slight rolling off of the high frequencies caus-
ing a "softening" of the picture. There are two solutions
to achieve higher performance. One way is to design
the PC board traces associated with the outputs such
that they exhibit some inductance. By routing the traces
in a repeating "S" configuration, the traces that are
nearest each other will exhibit a mutual inductance
increasing the total inductance. This series inductance
causes the amplitude response to increase or peak at
higher frequencies, offsetting the rolloff from the para-
sitic capacitance. Another solution is to add a small-
value inductor to the output.
On-S c reen Display Insertion
The MAX4356 facilitates the insertion of on-screen
graphics and characters by using the built-in fast 2:1
multiplexer associated with each of the 16 outputs
(Functional Diagram). This mux switches in 40ns, much
less than the width of a single pixel. Access to this fast
mux is through 16 dedicated OSDFILL analog inputs
and 16 dedicated OSDKEY input controls. OSD timing
is externally controlled and applied to the OSDKEY
inputs (Figure 1). Pulling OSDKEYi low switches the
signal on the OSDFILL
i
input to the OUT
i
output. When
the OSDKEY signal is logic high, the signal at IN_ is
switched to the output. This switching action is repeat-
ed on a pixel-by-pixel basis for each scan line. In this
way any synchronized video signal, including arbitrary
graphics, can be inserted on the screen (Figure 9).
Figure 7. 64 x 16 Nonblocking Matrix with Reduced Capacitive
Loading
IN (0
–
15)
IN (16
–
31)
IN (32
–
47)
IN (48
–
63)
OUTPUTS (0
–
15)
OUTPUTS (16
–
32)
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
IN (64
–
79)
IN (80
–
95)
IN (96
–
111)
IN (112
–
127)
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
Figure 6. 128 x 32 Nonblocking Matrix Using 16 x 16 Crosspoint Devices
IN (0
–
15)
IN (16
–
31)
IN (32
–
47)
IN (48
–
63)
OUTPUTS (0
–
15)
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
16
IN
16
OUT
MAX4356
MAX4356
MAX4356
MAX4356
MAX4356
16
IN
16
OUT
MAX4356
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX4358ECE | 32 x 16 Nonblocking Video Crosspoint Switch with On-Screen Display Insertion and I/O Buffers |
| MAX4358 | 32 x 16 Nonblocking Video Crosspoint Switch with On-Screen Display Insertion and I/O Buffers |
| MAX4361EUA | ADSL Drivers/Receivers for Customer Premise Equipment |
| MAX4361ESA | ADSL Drivers/Receivers for Customer Premise Equipment |
| MAX4362ESD | ADSL Drivers/Receivers for Customer Premise Equipment |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4356ECD | 功能描述:模擬和數(shù)字交叉點(diǎn) IC RoHS:否 制造商:Micrel 配置:2 x 2 封裝 / 箱體:MLF-16 數(shù)據(jù)速率:10.7 Gbps 輸入電平:CML, LVDS, LVPECL 輸出電平:CML 電源電壓-最大:3.6 V 電源電壓-最小:2.375 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 產(chǎn)品:Digital Crosspoint 封裝:Tube |
| MAX4356ECD+ | 功能描述:視頻開關(guān) IC 16x16 Nonblocking Video Crx Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（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 |
| MAX4356ECD+T | 功能描述:視頻開關(guān) IC 16x16 Nonblocking Video Crx Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（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 |
| MAX4356ECD-T | 功能描述:模擬和數(shù)字交叉點(diǎn) IC RoHS:否 制造商:Micrel 配置:2 x 2 封裝 / 箱體:MLF-16 數(shù)據(jù)速率:10.7 Gbps 輸入電平:CML, LVDS, LVPECL 輸出電平:CML 電源電壓-最大:3.6 V 電源電壓-最小:2.375 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 產(chǎn)品:Digital Crosspoint 封裝:Tube |
| MAX4357ECD | 功能描述:模擬和數(shù)字交叉點(diǎn) IC Integrated Circuits (ICs) RoHS:否 制造商:Micrel 配置:2 x 2 封裝 / 箱體:MLF-16 數(shù)據(jù)速率:10.7 Gbps 輸入電平:CML, LVDS, LVPECL 輸出電平:CML 電源電壓-最大:3.6 V 電源電壓-最小:2.375 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 產(chǎn)品:Digital Crosspoint 封裝:Tube |
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