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PDF MAX4399CTK Data sheet ( Hoja de datos )
| Número de pieza | MAX4399CTK | |
| Descripción | Audio/Video Switch for Three SCART Connectors | |
| Fabricantes | Maxim Integrated | |
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19-2925; Rev 0; 8/03
EVAALVUAAILTAIOBNLEKIT
Audio/Video Switch for Three SCART
Connectors
General Description
The MAX4399 audio/video switch is ideal for digital set-
top box applications. The MAX4399 provides video and
audio routing from the MPEG decoder source to the TV,
VCR, and AUX SCART (peritelevision) connectors. In
addition, the TV audio channel features clickless
switching and programmable volume control from
-56dB to +6dB in 2dB steps. The device can mix an
auxiliary audio tone into the TV audio channel and can
mix the stereo audio signal into a mono audio signal.
The MAX4399 directly drives an external RF modulator
with a composite video with blanking and sound
(CVBS) signal created by an on-chip luma/chroma
(Y/C) mixer and external RLC trap filter. The MAX4399
features a fast-mode I2C™-compatible 2-wire interface
allowing communication at data rates up to 400kbps.
The MAX4399 operates with standard +5V and +12V
single supplies and supports slow and fast switching.
All video and audio inputs are AC-coupled. The DC
biases of all input and output signals are set to pre-
defined levels. All video outputs, including the RF mod-
ulator, drive standard 150Ω loads. Red, green, and
blue (RGB) outputs feature a programmable gain of
+6dB ±1dB. All other video outputs have a fixed +6dB
gain. The VCR and AUX audio output gains are pro-
grammable for -6dB, 0dB, and +6dB.
The MAX4399 is available in a compact 68-pin thin
QFN package and is specified for the 0°C to +70°C
commercial temperature range. The MAX4399 evalua-
tion kit is available to help speed designs.
Satellite Receivers
Satellite Set-Top Boxes
Cable Set-Top Boxes
Terrestrial Set-Top Boxes
Game Consoles
TVs
Digital Television (DTV)
VCRs
DVD Players
DVD+R/W Players
Applications
Purchase of I2C components of Maxim Integrated Products,
Inc. or one of its sublicensed Associated Companies, conveys
a license under the Philips I2C Patent Rights to use these com-
ponents in an I2C system, provided that the system conforms
to the I2C Standard Specification as defined by Philips.
Features
o Low -86dB Video Signal-to-Noise Ratio
o 150Ω Driver on All Video Outputs, Including the
RF Modulator
o Full CVBS Loop-Through on AUX SCART
o Programmable Audio Gain Control of -56dB to
+6dB (TV Audio Outputs)
o Clickless Audio Switching (TV Audio Outputs)
o Programmable Clamp or Bias on Red/Chroma
Video Inputs
o Programmable Video Gain of +6dB, ±1dB on RGB
Outputs
o +5V and +12V Standard Supply Voltages
o 27MHz -3dB Large-Signal Bandwidth on All Video
Drivers
o Supports Three SCART Connectors
Ordering Information
PART
MAX4399CTK
TEMP RANGE
0°C to +70°C
PIN-PACKAGE
68 Thin QFN
Typical Operating Circuit
VIDEO DIGITAL AUDIO
+5V +5V +12V
RGB CVBS
S-VHS
S-VHS
STB
ENCODER
CVBS
R/L AUDIO
RGB
R/L AUDIO
TV SCART
CONNECTOR
FAST SWITCHING
I2C-COMPATIBLE
2-WIRE INTERFACE
SATELLITE DISH
TONE INPUT
CVBS
MAX4399
SCART
SWITCH
MATRIX
SLOW SWITCHING
FAST SWITCHING
CVBS
MONO AUDIO
CHANNEL
3/4 RF
MODULATOR
SUBCARRIER TRAP
S-VHS
RGB
VCR SCART
CONNECTOR
R/L AUDIO
FAST SWITCHING
SLOW SWITCHING
R/L PHONO AUDIO
CVBS
S-VHS
R/L AUDIO
AUXILIARY
SCART
CONNECTOR
SLOW SWITCHING
VIDEO
GROUND
AUDIO
GROUND
DIGITAL
GROUND
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
Audio/Video Switch for Three SCART
Connectors
ELECTRICAL CHARACTERISTICS (continued)
(VV12 = 12V, VV_VID = 5V, VV_DIG = 5V, 0.47µF X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from V_AUD to
G_AUD, no load, TA = 0°C to +70°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Minimum Receive SCL/SDA Rise
Time (Note 3)
tR
20 +
0.1CB
ns
Maximum Receive SCL/SDA Fall
Time (Note 3)
tF
300 ns
Minimum Receive SCL/SDA Fall
Time (Note 3)
Setup Time for Stop Condition
Bus Free Time Between a Stop
and Start
tF
tSU,STO
tBUF
20 +
0.1CB
0.6
1.3
ns
µs
µs
OTHER DIGITAL PINS
DEV_ADDR Low Level
DEV_ADDR High Level
INTERRUPT_OUT Low Voltage
INTERRUPT_OUT sinking 1mA
0.8
2.6
0.15 0.4
V
V
V
INTERRUPT_OUT High Leakage
Current
VINTERRUPT_OUT = 5V
SLOW SWITCHING
Input Low Level
0
Input Medium Level
4.5
Input High Level
9.5
Input Current
Output Low Level
RLOAD = 10kΩ to ground
0
Output Medium Level (External
16/9)
RLOAD = 10kΩ to ground
5.0
Output High Level (External 4/3)
FAST SWITCHING
RLOAD = 10kΩ to ground
10
Input Low Level
0
Input High Level
1
Input Current
Output Low Level
Output High Level
Fast-Switching Output to RGB
Skew
ISINK = 0.5mA
V_VID - VOH, ISOURCE = 20mA
Difference in propagation delays of fast-
switching signal and RGB signals;
measured from 50% input transition to 50%
output transition
0
Fast-Switching Output Rise Time
Fast-Switching Output Fall Time
RLOAD = 150Ω to ground
RLOAD = 150Ω to ground
Note 1: All devices are 100% tested at TA = +25°C. All temperature limits are guaranteed by design.
Note 2: Parameter guaranteed by design.
Note 3: CB = total capacitance of one bus line in pF. Tested with CB = 400pF.
1 10
2
7.0
12.0
50 100
1.5
6.5
12
1
0.01
0.75
0.4
3
10
0.2
2
30
30
30
µA
V
V
V
µA
V
V
V
V
V
µA
V
V
ns
ns
ns
_______________________________________________________________________________________ 5
5 Page 
Audio/Video Switch for Three SCART
Connectors
TV_R/C_IN
CLAMP/BIAS
MAX4399
VGA
5dB, 6dB, 7dB
TV_R/C_OUT
75Ω
PULL-
DOWN
N
0.1µF
PIN 15
PIN 13
0.1µF
PIN 15
SCART
CABLE
PIN 13
SCART
CONNECTORS
MAX4399
VGA
5dB, 6dB, 7dB
75Ω TV_R/C_OUT
N PULL-
DOWN
CLAMP/BIAS
TV_R/C_IN
VIDEO INPUT
CLAMP
CLAMP
VIDEO INPUT
Figure 1. Bidirectional SCART Pins
The inputs and outputs are grouped by SCART connec-
tors: TV, VCR, and AUX. While the SCART connector
supports RGB, S-video, and composite formats, RGB
and S-video share a bidirectional set of SCART connec-
tor pins. The MAX4399 supports connection of auxiliary
devices (DVD players, DVD+R/W recorders, game con-
soles, camcorders, etc.) by including full I/O support for
an auxiliary (AUX) SCART connector.
Video Inputs
All of the video amplifier inputs are AC-coupled with an
external 0.1µF capacitor. Either a clamp or bias circuit
sets the DC input level of the video signals. The clamp
circuit positions the sync tip of the CVBS, RGB, or luma
(S-VHS) signals. If the signal does not have sync, then
the clamp positions the minimum of the signal at the
clamp voltage. The bias circuit positions the chroma sig-
nal (S-VHS) at its midlevel. On the video inputs that can
receive either a chroma or a red video signal, the 2-wire
interface sets whether the clamp or bias circuit is active.
Red/chroma signals, such as TV_R/C_OUT signals are
bidirectional. When the red/chroma signal is being
used as an input, then the red/chroma output must con-
nect the 75Ω back-termination resistor to ground, as
shown in Figure 1, so the transmitting device can see
the proper termination on the receiving side. The
MAX4399 provides an active pulldown to G_VID on all
red/chroma outputs (AUX_R/C_OUT, TV_R/C_OUT, and
VCR_R/C_OUT).
The MPEG decoder and VCR uses the RGB format to
insert an on-screen display (OSD), usually text, onto the
TV. A fast-switching signal controls whether the RGB
signals or composite video signal appear on the TV.
The MAX4399 supports RGB as an input from either the
VCR or the MPEG decoder and as an output only to the
TV. The red video signal of the RGB format and the
chroma video signal of the S-VHS format share the
same SCART connector pin; therefore RGB signals and
S-VHS signals cannot be present at the same time.
Loop-through is possible with a composite video signal
but not with RGB signals because the RGB SCART pins
are used for both input and output.
The VCR, MPEG decoder, auxiliary device, and TV use
the S-VHS format, which is the high-quality format for the
home today. The MAX4399 supports S-VHS as an input
from the VCR, MPEG decoder, auxiliary device, and TV,
and as a separately switchable output to the TV, VCR,
and AUX SCART connectors. Because S-VHS support
was not included in the original specification of the
SCART connector, the Y signal of S-VHS and the CVBS
signal share the same SCART connector pins. If S-VHS
is present, then a composite signal must be created
______________________________________________________________________________________ 11
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| PDF Descargar | [ Datasheet MAX4399CTK.PDF ] | |
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