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PDF FMS6502 Data sheet ( Hoja de datos )
| Número de pieza | FMS6502 | |
| Descripción | 8-Input 6-Output Video Switch Matrix | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de FMS6502 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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www.DataSheet4U.com
January 2007
FMS6502
8-Input, 6-Output Video Switch Matrix with Output Drivers,
Input Clamp, and Bias Circuitry
Features
■ 8 x 6 Crosspoint Switch Matrix
■ Supports SD, PS, and HD 1080i / 1080p Video
■ Input Clamp and Bias Circuitry
■ Doubly Terminated 75Ω Cable Drivers
■ Programmable 0dB or 6dB Gain
■ AC- or DC-Coupled Inputs
■ AC- or DC-Coupled Outputs
■ One-to-One or One-to-Many Input-to-Output
Switching
■ I2CTM-Compatible Digital Interface, Standard Mode
■ 3.3V or 5V Single Supply Operation
■ Pb-Free TSSOP-24 Package
Description
The FMS6502 provides eight inputs that can be routed to
any of six outputs. Each input can be routed to one or
more outputs, but only one input may be routed to any
output.
Each input supports an integrated clamp option to set the
output sync tip level of video with sync to ~300mV. Alter-
natively, the input may be internally biased to center out-
put signals without sync (Chroma, Pb, Pr) at ~1.25V.
All outputs are designed to drive a 150Ω DC-coupled
load. Each output can be programmed to provide either
0dB or 6dB of signal gain.
Input-to-output routing and input bias mode functions are
controlled via an I2C-compatible digital interface.
Applications
■ Cable and Satellite Set-Top Boxes
■ TV and HDTV Sets
■ A / V Switchers
■ Personal Video Recorders (PVR)
■ Security and Surveillance
■ Video Distribution
■ Automotive (In-Cabin Entertainment)
Block Diagram
IN1 C / B
IN2 C / B
IN8
SDA
SCL
ADDR0
ADDR1
VCC (2)
GND (4)
C/B
OUT1
OUT2
Figure 1. Block Diagram
OUT6
Ordering Information
Part Number
FMS6502MTC24
FMS6502MTC24X
Pb-Free
Yes
Yes
Operating
Temperature Range
-40°C to 85°C
-40°C to 85°C
Package
24-Lead Thin Shrink Small
Ouline Package
24-Lead Thin Shrink Small
Ouline Package
Packing Method
Rail
Reel
© 2006 Fairchild Semiconductor Corporation
Rev. 1.0.0
www.fairchildsemi.com
1 page  
DC Electrical Characteristics
TA = 25°C, Vcc = 5V, Vin = 1Vpp, input bias mode, one-to-one routing, 6dB gain, all inputs AC-coupled with 0.1μF,
unused inputs AC-terminated through 75Ω to GND, all outputs AC-coupled with 220μF into 150Ω, referenced to
400kHz unless otherwise noted.
Symbol
ICC
VOUT
Vclamp
Vbias
Parameter
Supply Current(1)
Video Output Range
DC Input Level(1)
DC Output Level(1)
DC Output Level(1)
DC Input Level(1)
DC Output Level(1)
DC Output Level(1)
Conditions
No Load, All Outputs Enabled
Clamp Mode, All Gain Settings
Clamp Mode, 0dB Gain Setting
Clamp Mode, 6dB Gain Setting
Bias Mode, All Gain Settings
Bias Mode, 0dB Gain Setting
Bias Mode, 6dB Gain Setting
PSRR Power Supply Rejection Ratio All Channels, DC
Min.
0.10
0.10
0.20
0.575
0.575
1.150
Typ.
55
2.8
0.15
0.15
0.30
0.625
0.625
1.250
90
Max.
75
0.20
0.20
0.40
0.675
0.700
1.400
Unit
mA
Vpp
V
V
V
V
V
V
dB
Note:
1. 100% tested at 25°C.
AC Electrical Characteristics
TA= 25°C, Vcc = 5V, Vin = 1Vpp, input bias mode, one-to-one routing, 6dB gain, all inputs AC-coupled with 0.1μF,
unused inputs AC-terminated through 75Ω to GND, all outputs AC-coupled with 220μF into 150Ω, referenced to
400kHz unless otherwise noted.
Symbol
AV0dB
AV6dB
f+1dB
f-1dB
fC
dG
Parameter
Channel Gain(1)
Channel Gain(1)
+1dB Peaking Bandwidth
-1dB Bandwidth
-3dB Bandwidth
Differential Gain
dφ Differential Phase
THDSD
THDHD
XTALK1
XTALK2
XTALK3
XTALK4
XTALK5
SNRSD
SD Output Distortion
HD Output Distortion
Input Crosstalk
Input Crosstalk
Output Crosstalk
Output Crosstalk
Multi-Channel Crosstalk
Signal-to-Noise Ratio(5)
Conditions
DC, All Channels, 0dB Gain Setting
DC, All Channels, 6dB Gain Setting
VOUT = 1.4Vpp
VOUT = 1.4Vpp
VOUT = 1.4Vpp
VCC = 5.0V , 3.58MHz
VCC = 5.0V , 3.58MHz
VOUT = 1.4Vpp, 5MHz, VCC = 5.0V
VOUT = 1.4Vpp, 22MHz, VCC = 5.0V
1MHz, VOUT = 2Vpp(2)
15MHz, VOUT = 2Vpp(2)
1MHz, VOUT = 2Vpp(3)
15MHz, VOUT = 2Vpp(3)
Standard Video, VOUT = 2Vpp(4)
NTC-7 Weighting, 4.2MHz LP,
100kHz HP
Min.
-0.2
5.8
Typ.
0
6
65
90
115
0.1
0.2
0.05
0.4
-77
-62
-81
-62
-50
78
VNOISE Channel Noise
AMPON Amplifier Recovery Time
400kHz to 100MHz, Input Referred
Post I2C Programming
20
300
Notes:
1. 100% tested at 25°C.
2. Adjacent input pair to adjacent output pair. Interfering input is through an open switch.
3. Adjacent input pair to adjacent output pair. Interfering input is through a closed switch.
4. Crosstalk of eight synchronous switching outputs onto single, asynchronous switching output.
5. SNR = 20 * log (714mV / rms noise).
Max.
+0.2
6.2
Unit
dB
dB
MHz
MHz
MHz
%
°
%
%
dB
dB
dB
dB
dB
dB
nV/√Hz
ns
© 2006 Fairchild Semiconductor Corporation
FMS6502 Rev. 1.0.0
5
www.fairchildsemi.com
5 Page 
Layout Considerations
General layout and supply bypassing play a major role in
high-frequency performance and thermal characteristics.
Fairchild offers a demonstration board to guide layout
and aid device evaluation. The demo board is a four-
layer board with full power and ground planes. Following
this layout configuration provides optimum performance
and thermal characteristics for the device. For the best
results, follow the steps and recommended routing rules
listed below.
Recommended Routing/Layout Rules
• Do not run analog and digital signals in parallel.
• Use separate analog and digital power planes to sup-
ply power.
• Traces should run on top of the ground plane at all
times.
• No trace should run over ground/power splits.
• Avoid routing at 90-degree angles.
• Minimize clock and video data trace length differ-
ences.
• Include 10µF and 0.1µF ceramic power supply bypass
capacitors.
• Place the 0.1µF capacitor within 0.1 inches of the
device power pin.
• Place the 10µF capacitor within 0.75 inches of the
device power pin.
• For multilayer boards, use a large ground plane to
help dissipate heat.
• For two-layer boards, use a ground plane that extends
beyond the device body by at least 0.5 inches on all
sides. Include a metal paddle under the device on the
top layer.
• Minimize all trace lengths to reduce series inductance.
Thermal Considerations
Since the interior of most systems, such as set-top
boxes, TVs, and DVD players, are at +70ºC; consider-
ation must be given to providing an adequate heat sink
for the device package for maximum heat dissipation.
When designing a system board, determine how much
power each device dissipates. Ensure that devices of
high power are not placed in the same location, such as
directly above (top plane) or below (bottom plane) each
other on the PCB.
PCB Thermal Layout Considerations
• Understand the system power requirements and envi-
ronmental conditions.
• Maximize thermal performance of the PCB.
• Consider using 70µm of copper for high-power
designs.
• Make the PCB as thin as possible by reducing FR4
thickness.
• Use vias in power pad to tie adjacent layers together.
• Remember that baseline temperature is a function of
board area, not copper thickness.
• Modeling techniques can provide a first-order approxi-
mation.
Power Dissipation
Worst-case, additional die power due to DC loading can
be estimated at Vcc2/4Rload 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.
Applications for the FMS6502 Video Switch
Matrix
The increased demand for consumer multimedia sys-
tems has created a large challenge for system designers
to provide cost-effective solutions to capitalize on the
growth potential in graphics display technologies. These
applications require cost-effective video switching and fil-
tering 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 (such as navigation, in-cabin
entertainment, and back-up cameras). In all cases, the
advantages the 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. This is used to take multiple
inputs and route them to their appropriate signal paths
(main picture and picture-in-picture, or PiP). These are
normally routed into ADCs that are followed by decod-
ers. Technologies for HDTV include LCD, plasma, and
CRT, which have similar analog switching circuitry.
VIPDEMOTM Control Software
The FMS6502 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 FMS6502 register map. This
software is included in the FMS6502DEMO kit. A parallel
port I2C adapter and an interface cable to connect to the
demo board are also included. Besides using the full
FMS6502 interface, the VIPDEMOTM can also be used
to control single register read and writes for I2C.
© 2006 Fairchild Semiconductor Corporation
FMS6502 Rev. 1.0.0
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet FMS6502.PDF ] | |
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