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| 型号： | MAX4356ECD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 30/41页 |
| 文件大小： | 0K |
| 描述： | IC VIDEO CROSSPOINT SWIT 128TQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 250 |
| 功能： | 视频交叉点开关 |
| 电路： | 1 x 16:16 |
| 电压电源： | 单/双电源 |
| 电压 - 电源，单路/双路(±)： | 5V，± 3 V ~ 5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 128-LQFP |
| 供应商设备封装： | 128-LQFP（14x20） |
| 包装： | 带卷 (TR) |
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MAX4356
16 x 16 Nonblocking Video Crosspoint Switch
with On-Screen 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-Screen 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 OSDFILLi input to the OUTi 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
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
16
IN
16
OUT
MAX4356
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相关代理商/技术参数 |
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|---|---|
| MAX4357ECD | 功能描述:模拟和数字交叉点 IC Integrated Circuits (ICs) RoHS:否 制造商:Micrel 配置:2 x 2 封装 / 箱体:MLF-16 数据速率:10.7 Gbps 输入电平:CML, LVDS, LVPECL 输出电平:CML 电源电压-最大:3.6 V 电源电压-最小:2.375 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 产品:Digital Crosspoint 封装:Tube |
| MAX4357ECD+ | 功能描述:模拟和数字交叉点 IC 32x16 Nonblocking Video Crx Switch RoHS:否 制造商:Micrel 配置:2 x 2 封装 / 箱体:MLF-16 数据速率:10.7 Gbps 输入电平:CML, LVDS, LVPECL 输出电平:CML 电源电压-最大:3.6 V 电源电压-最小:2.375 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 产品:Digital Crosspoint 封装:Tube |
| MAX4357ECD+D | 功能描述:模拟和数字交叉点 IC 32x16 Nonblocking Video Crx Switch RoHS:否 制造商:Micrel 配置:2 x 2 封装 / 箱体:MLF-16 数据速率:10.7 Gbps 输入电平:CML, LVDS, LVPECL 输出电平:CML 电源电压-最大:3.6 V 电源电压-最小:2.375 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 产品:Digital Crosspoint 封装:Tube |
| MAX4357ECD+T | 功能描述:模拟和数字交叉点 IC 32x16 Nonblocking Video Crx Switch RoHS:否 制造商:Micrel 配置:2 x 2 封装 / 箱体:MLF-16 数据速率:10.7 Gbps 输入电平:CML, LVDS, LVPECL 输出电平:CML 电源电压-最大:3.6 V 电源电压-最小:2.375 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 产品:Digital Crosspoint 封装:Tube |
| MAX4357ECD+TD | 功能描述:模拟和数字交叉点 IC 32x16 Nonblocking Video Crx Switch RoHS:否 制造商:Micrel 配置:2 x 2 封装 / 箱体:MLF-16 数据速率:10.7 Gbps 输入电平:CML, LVDS, LVPECL 输出电平:CML 电源电压-最大:3.6 V 电源电压-最小:2.375 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 产品:Digital Crosspoint 封装:Tube |
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