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参数资料
| 型号： | FMS6501MSA28X |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 4/14页 |
| 文件大小： | 0K |
| 描述： | IC VIDEO SW MATRIX 12X9 28SSOP |
| 标准包装： | 1 |
| 类型： | 视频开关，12 输入，9 输出 |
| 应用： | 机顶盒 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 1214 (CN2011-ZH PDF) |
| 其它名称： | FMS6501MSA28XDKR |
FMS6501
—
12
Input
/
9
Output
V
ideo
Switch
Matrix
with
I
nput
Clamp,
Input
Bias
Circ
uitry
,and
Output
Drivers
2004 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FMS6501 Rev. 1.0.4
12
Layout Considerations
General layout and supply bypassing play major roles in
high-frequency performance and thermal characteristics.
Fairchild offers a demonstration board, FMS6501DEMO,
to use as a guide for layout and to aid in device testing
and characterization. The FMS6501DEMO is a 4-layer
board with a full power and ground plane. For optimum
results, follow the steps below as a basis for high fre-
quency layout.
■ Include 10F and 0.1F bypass capacitors.
■ Place the 10F capacitor within 0.75 inches of the
power pin.
■ Place the 0.1F capacitor within 0.1 inches of the
power pin.
■ Connect all external ground pins as tightly as possible,
preferably with a large ground plane under the
package.
■ Layout channel connections to reduce mutual trace
inductance.
■ Minimize all trace lengths to reduce series induc-
tances. If routing across a board, place device such
that longer traces are at the inputs rather than the
outputs.
If using multiple, low-impedance, DC-coupled outputs,
special layout techniques may be employed to help dissi-
pate heat.
If a multilayer board is used, a large ground plane
directly under the device helps reduce package case
temperature.
For dual-layer boards, an extended plane can be used.
Worst-case, additional die power due to DC loading can
be estimated at (Vcc
2/4R
load) per output channel. This
assumes a constant DC output voltage of Vcc/2. For 5V
Vcc with a dual-DC video load, add 25/(4*75) = 83mW,
per channel.
FMS6501 Video Switch Matrix Applications
The increased demand for consumer multimedia sys-
tems has created a challenge for system designers to
provide cost-effective solutions to capitalize on the
growth potential in graphics display technologies. These
applications requires cost-effective video switching and
filtering solutions to deploy high-quality display technolo-
gies rapidly and effectively to the target audience. Areas
of specific interest include HDTV, media centers, and
automotive “infotainment” (includes navigation, in-cabin
entertainment, and back-up camera). In all cases, the
advantages an integrated video switch matrix provides
are high quality video switching specific to the applica-
tion, as well as video input clamps and on-chip, low-
impedance output cable drivers with switchable gain.
Generally the largest application for a video switch is for
the front end of an HDTV, where it takes multiple inputs
and routes them to appropriate signal paths (main pic-
ture and picture in picture - PiP). These are normally
routed into ADCs followed by decoders. There are many
different technologies for HDTV; including LCD, Plasma,
and CRT, with similar analog switching circuitry.
An example of a HDTV application is shown in Figure 14.
This system combines a video switch matrix and two
three-channel switchable anti-aliasing filters. There are
two three-channel signal paths in the system; one for the
main picture, the other for “Picture in Picture” (PiP).
VIPDEMOTM Control Software
The FMS6501 is configured via an I2C-compatible digital
interface. To facilitate demonstration, Fairchild Semicon-
ductor had developed the VIPDEMOTM GUI-based con-
trol software to write to the FMS6501 register map. This
software is included in the FMS6501DEMO kit. Also
included is a parallel port I2C adapter and an interface
cable to connect to the demo board. Besides using the
full FMS6501 interface, the VIPDEMOTM can also be
used to control single-register read and writes for I2C.
Figure 14. HDTV Application using the FMS6501 Video Switch Matrix
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