Rainbow Electronics MAX4399 User Manual
General Description
The MAX4399 audio/video switch is ideal for digital settop 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 predefined levels. All video outputs, including the RF modulator, 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 programmable 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 evaluation kit is available to help speed designs.
Applications
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
Features
♦ Low -86dB Video Signal-to-Noise Ratio
♦ 150Ω Driver on All Video Outputs, Including the
RF Modulator
♦ Full CVBS Loop-Through on AUX SCART
♦ Programmable Audio Gain Control of -56dB to
+6dB (TV Audio Outputs)
♦ Clickless Audio Switching (TV Audio Outputs)
♦ Programmable Clamp or Bias on Red/Chroma
Video Inputs
♦ Programmable Video Gain of +6dB, ±1dB on RGB
Outputs
♦ +5V and +12V Standard Supply Voltages
♦ 27MHz -3dB Large-Signal Bandwidth on All Video
Drivers
♦ Supports Three SCART Connectors
MAX4399
Audio/Video Switch for Three SCART
Connectors
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
MAX4399
SCART
SWITCH
MATRIX
I
2
C-COMPATIBLE
2-WIRE INTERFACE
STB
ENCODER
RGB
S-VHS
CVBS
R/L AUDIO
FAST SWITCHING
VCR SCART
CONNECTOR
TONE INPUT
CVBS
S-VHS
RGB
R/L AUDIO
FAST SWITCHING
SLOW SWITCHING
TV SCART
CONNECTOR
AUXILIARY
SCART
CONNECTOR
CHANNEL
3/4 RF
MODULATOR
SUBCARRIER TRAP
CVBS
S-VHS
RGB
R/L AUDIO
SLOW SWITCHING
FAST SWITCHING
CVBS
MONO AUDIO
R/L PHONO AUDIO
CVBS
S-VHS
R/L AUDIO
SLOW SWITCHING
VIDEO
GROUND
DIGITAL
GROUND
AUDIO
GROUND
VIDEO
+5V
DIGITAL
+5V
AUDIO
+12V
SATELLITE DISH
Typical Operating Circuit
19-2925; Rev 0; 8/03
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.
EVALUATION KIT
AVAILABLE
Purchase of I2C components of Maxim Integrated Products,
Inc. or one of its sublicensed Associated Companies, conveys
a license under the Philips I
2
C Patent Rights to use these com-
ponents in an I
2
C system, provided that the system conforms
to the I
2
C Standard Specification as defined by Philips.
PART TEMP RANGE PIN-PACKAGE
MAX4399CTK 0°C to +70°C 68 Thin QFN
MAX4399
Audio/Video Switch for Three SCART
Connectors
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Voltages
V_VID to G_VID .....................................................-0.3V to +6V
V12 to G_AUD .....................................................-0.3V to +14V
V_DIG to G_DIG ....................................................-0.3V to +6V
G_AUD to G_DIG ...............................................-0.1V to +0.1V
G_VID to G_DIG .................................................-0.1V to +0.1V
G_AUD to G_VID ................................................-0.1V to +0.1V
Video Inputs, Video Outputs, ENC_FS_IN, VCR_FS_IN,
VID_BIAS, TRAP ................................-0.3V to (V
V_VID
+ 0.3V)
V_AUD to G_AUD................................................-0.3V to +9V
Audio Inputs, Audio Outputs,
AUD_BIAS........................................-0.3V to (V
V_AUD
+ 0.3V)
SDA, SCL, DEV_ADDR, INTERRUPT_OUT .........-0.3V to +6V
AUX_SS, TV_SS, VCR_SS ....................-0.3V to (V
V12
+ 0.3V)
Currents
INTERRUPT_OUT ..........................................................+50mA
TRAP................................................................................±4mA
Output Short Circuit
Video Outputs and TV_FS_OUT to V_VID,
V_DIG, G_AUD, G_VID, or G_DIG ........................Continuous
Audio Outputs to V_AUD, V_VID, V_DIG,
G_AUD, G_VID, or G_DIG.....................................Continuous
AUX_SS, TV_SS, and VCR_SS to V12,
V_AUD, V_VID, V_DIG, G_AUD,
G_VID, or G_DIG...................................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
68-Pin Thin QFN (derate 41.7mW/°C
above +70°C).........................................................3333.3mW
Operating Temperature Range...............................0°C to +70°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
V12
= 12V, V
V_VID
= 5V, V
V_DIG
= 5V, 0.47µF X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from V_AUD to
G_AUD, no load, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
DC
V12 Supply Voltage Range Inferred from the slow switch output levels 11.4 12 12.6 V
V_VID Supply Voltage Range
V_DIG Supply Voltage Range 4.75 5 5.25 V
V12 Quiescent Supply Current 17 35 mA
V_VID Quiescent Supply Current
V_VID Standby Supply Current
V_DIG Quiescent Supply Current 13mA
VIDEO
Voltage Gain 1V
Small-Signal Bandwidth, -3dB
Large-Signal Bandwidth, -3dB
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Inferred from the output swing of the video
outputs
All video output amplifiers are enabled, no
load
All video output amplifiers are in shutdown,
and TV_FS_OUT driver is in shutdown
input
P-P
100mV
gain = 6dB
1V
= 6dB, T
+25°C (Note 2)
P-P
input, gain
P-P
=
A
input,
CVBS and S-VHS 5.5 6 6.5
R, G, B, gain = 5dB 4.5 5 5.5
R, G, B, gain = 6dB 5.5 6 6.5
R, G, B, gain = 7dB 6.5 7 7.5
CVBS and S-VHS 110
R, G, B 110
CVBS and S-VHS 15 27
R, G, B 30
4.75 5 5.25 V
51 116 mA
19 34 mA
MHz
MHz
dB
MAX4399
Audio/Video Switch for Three SCART
Connectors
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
V12
= 12V, V
V_VID
= 5V, V
V_DIG
= 5V, 0.47µF X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from V_AUD to
G_AUD, no load, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Slew Rate SR 1V
Gain Matching 1V
Differential Gain DG
Differential Phase DP
Signal-to-Noise Ratio SNR 1V
Group Delay
Bottom Level Clamp
Chroma Bias Chroma only, no signal, no load 1.88 V
Sync Crush
Power-Supply Rejection Ratio PSRR f = 100kHz, 0.5V
Input Impedance
Input Clamp Current VIN = 1.75V 2.5 4.2 8.0 µA
Output Bias Voltage
Pulldown Resistance
Crosstalk
Mute Suppression f = 4.43MHz, 1V
AUDIO
V_AUD Voltage Generated by internal linear regulator 8.1 V
Voltage Gain 1.414V
Gain Matching Between
Channels
Gain Flatness
Frequency Bandwidth
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
input, gain = 6dB 170 V/µs
P-P
input, between RGB or Y-C -0.5 0 +0.5 dB
P-P
5-step
modulated
staircase
5-step
modulated
staircase
input -86 dB
P-P
f = 0.1MHz to
6MHz
RGB, composite and luma, no signal, no
load
Percentage reduction in sync pulse
(0.3V
current with a 0.1µF coupling capacitor
CVBS, Y, or RGB video input 4 MΩ
Chroma video input 11 kΩ
No signal, no
load
VCR_R/C_OUT, AUX_R/C_OUT,
TV_R/C_OUT
f = 4.43MHz, 1V
active inputs
1.414V
f = 20Hz to 20kHz, 0.5V
0dB
0.5V
-3dB with 1kHz serving as 0dB
); inferred from input clamping
P-P
P-P
P-P
input; frequency where output is
RMS
RF_CVBS_OUT 0.03
All other video outputs 0.13
RF_CVBS_OUT 0.09
All other video outputs 0.36
RF_CVBS_OUT 5
All other video outputs 3
P-P
RGB, composite, and
luma
Chroma 2.24
input, between any two
P-P
input, on one input -65 dB
P-P
input, gain = 0dB -0.25 0 +0.25 dB
input, gain = 0dB -0.5 0 +0.5 dB
input, gain =
RMS
degrees
1.21 V
-2 0 +2 %
60 dB
1.05
10 Ω
-63 dB
0.005 dB
210 kHz
%
ns
V
MAX4399
Audio/Video Switch for Three SCART
Connectors
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
V12
= 12V, V
V_VID
= 5V, V
V_DIG
= 5V, 0.47µF X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from V_AUD to
G_AUD, no load, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Input DC Level Gain = 0dB V_AUD/2 V
Input Signal Amplitude
Input Resistance 100 kΩ
Output DC Level V_AUD/2 V
Signal-to-Noise Ratio SNR
Total Harmonic Distortion THD R
Output Impedance 0.5 Ω
Volume Attenuation Step
Power-Supply Rejection Ratio PSRR f = 1kHz, 0.5V
Mute Suppression f = 1kHz, 0.5V
Audio Limiter Level f = 1kHz, 2.5V
Crosstalk f = 1kHz, 0.5V
DIGITAL INTERFACE: SDA and SCL
Low-Level Input Voltage V
High-Level Input Voltage V
Hysteresis of Schmitt Trigger
Input
SDA Low-Level Output Voltage V
Output Fall Time for SDA Line 400pF bus load 250 ns
Spike Suppression 50 ns
Input Current VIL = 0V, VIH = 5V -10 +10 µA
Input Capacitance 5pF
SCL Clock Frequency 0 400 kHz
Hold Time t
Low Period of SCL Clock t
High Period of SCL Clock t
Setup Time for a Repeated Start
Condition
Data Hold Time t
Data Setup Time t
Maximum Receive SCL/SDA Rise
Time
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Inferred through total harmonic distortion
specification, f = 1kHz
IL
IH
OL
HD,STA
LOW
HIGH
t
SU,STA
HD,DAT
SU,DAT
t
R
f = 1.0kHz, 1V
20kHz
= 10kΩ
LOAD
1.414V
P-P
input
I
= 3mA 0 0.4
SINK
I
= 6mA 0 0.6
SINK
Repeated start condition 0.6 µs
(Note 3) 300 ns
, gain = 0dB, 20Hz to
RMS
f = 1.0kHz, 0.5V
f = 1.0kHz, 2V
TV audio, volume control
range extends from -56dB
to +6dB
VCR, AUX audio 5.5 6 6.5
P-P
input 105 dB
RMS
input 6.7 V
RMS
, gain = 0dB 105 dB
RMS
RMS
RMS
2V
105 dB
0.002
0.005
1.5 2 2.5
110 dB
0.8 V
2.6 V
0.2 V
1.3 µs
0.6 µs
0.6 µs
0 0.9 µs
100 ns
RMS
dB
%
P-P
V
MAX4399
Audio/Video Switch for Three SCART
Connectors
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(V
V12
= 12V, V
V_VID
= 5V, V
V_DIG
= 5V, 0.47µF X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from V_AUD to
G_AUD, no load, T
A
= 0°C to +70°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
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: C
B
= total capacitance of one bus line in pF. Tested with CB= 400pF.
Minimum Receive SCL/SDA Rise
Time (Note 3)
Maximum Receive SCL/SDA Fall
Time (Note 3)
Minimum Receive SCL/SDA Fall
Time (Note 3)
Setup Time for Stop Condition t
Bus Free Time Between a Stop
and Start
OTHER DIGITAL PINS
DEV_ADDR Low Level 0.8 V
DEV_ADDR High Level 2.6 V
INTERRUPT_OUT Low Voltage INTERRUPT_OUT sinking 1mA 0.15 0.4 V
INTERRUPT_OUT High Leakage
Current
SLOW SWITCHING
Input Low Level 02V
Input Medium Level 4.5 7.0 V
Input High Level 9.5 12.0 V
Input Current 50 100 µA
Output Low Level R
Output Medium Level (External
16/9)
Output High Level (External 4/3) R
FAST SWITCHING
Input Low Level 0 0.4 V
Input High Level 13V
Input Current 110µA
Output Low Level I
Output High Level V_VID - VOH, I
Fast-Switching Output to RGB
Skew
Fast-Switching Output Rise Time R
Fast-Switching Output Fall Time R
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
t
R
t
F
t
F
SU,STO
t
BUF
V
INTERRUPT_OUT
= 10kΩ to ground 0 1.5 V
LOAD
R
= 10kΩ to ground 5.0 6.5 V
LOAD
= 10kΩ to ground 10 12 V
LOAD
= 0.5mA 0 0.01 0.2 V
SINK
Difference in propagation delays of fastswitching signal and RGB signals;
measured from 50% input transition to 50%
output transition
= 150Ω to ground 30 ns
LOAD
= 150Ω to ground 30 ns
LOAD
= 5V 1 10 µA
= 20mA 0.75 2 V
SOURCE
20 +
0.1C
B
300 ns
20 +
0.1C
B
0.6 µs
1.3 µs
30 ns
ns
ns
MAX4399
Audio/Video Switch for Three SCART
Connectors
6 _______________________________________________________________________________________
Typical Operating Characteristics
(V
V12
= 12V, V
V_VID
= 5V, V
V_DIG
= 5V, 0.47µF ceramic X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from
V_AUD to G_AUD, no load, T
A
= +25°C, unless otherwise noted.)
RGB VIDEO LARGE-SIGNAL BANDWIDTH
vs. FREQUENCY
MAX4399 toc01
FREQUENCY (MHz)
GAIN (dB)
101
-5
-4
-3
-2
-1
0
1
2
3
4
-6
0.1 100
VIN = 1V
P-P
RL = 150Ω to G_VID
Y VIDEO LARGE-SIGNAL BANDWIDTH
vs. FREQUENCY
MAX4399 toc02
FREQUENCY (MHz)
GAIN (dB)
101
-5
-4
-3
-2
-1
0
1
2
3
4
-6
0.1 100
VIN = 1V
P-P
RL = 150Ω to G_VID
RGB VIDEO SMALL-SIGNAL BANDWIDTH
vs. FREQUENCY
MAX4399 toc03
FREQUENCY (MHz)
GAIN (dB)
101
-5
-4
-3
-2
-1
0
1
2
3
4
-6
0.1 100
1000
V
IN
= 100mV
P-P
RL = 150Ω to G_VID
Y VIDEO SMALL-SIGNAL BANDWIDTH
vs. FREQUENCY
MAX4399 toc04
FREQUENCY (MHz)
GAIN (dB)
101
-5
-4
-3
-2
-1
0
1
2
3
4
-6
0.1 100
VIN = 100mV
P-P
RL = 150Ω to G_VID
VIDEO CROSSTALK
vs. FREQUENCY
MAX4399 toc05
FREQUENCY (MHz)
CROSSTALK (dB)
101
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
0.1 100
VIN = 100mV
P-P
RL = 150Ω to G_VID
RF_CVBS_OUT (WITH TRAP FILTER)
MAX4399 toc06
DIFFERENTIAL PHASE (deg)
1324567
1324567
DIFFERENTIAL GAIN (%)
0.2
0.1
0
-0.2
-0.1
0.2
0.1
0
-0.2
-0.1
R
L
= 150Ω to G_VID
R
L
= 150Ω to G_VID
RF_CVBS_OUT (WITHOUT TRAP FILTER)
MAX4399 toc07
DIFFERENTIAL PHASE (deg)
DIFFERENTIAL GAIN (%)
RL = 150Ω to G_VID
R
L
= 150Ω to G_VID
0.2
0.1
0
-0.2
-0.1
0.2
0.1
0
-0.2
-0.1
1324567
1324567
TV_Y/CVBS_OUT
MAX4399 toc08
DIFFERENTIAL PHASE (deg)
1324567
1324567
DIFFERENTIAL GAIN (%)
RL = 150Ω to G_VID
R
L
= 150Ω to G_VID
0.5
0.3
0.1
-0.3
-0.1
0.2
0.1
0
-0.2
-0.1
-0.5
AUDIO LARGE-SIGNAL
BANDWIDTH vs. FREQUENCY
MAX4399 toc09
FREQUENCY (kHz)
GAIN (dB)
100101
-15
-12
-9
-6
-3
0
3
-18
0.1 1000
VIN = 0.5V
RMS
RL = 10kΩ to G_AUD
MAX4399
Audio/Video Switch for Three SCART
Connectors
_______________________________________________________________________________________ 7
Typical Operating Characteristics (continued)
(V
V12
= 12V, V
V_VID
= 5V, V
V_DIG
= 5V, 0.47µF ceramic X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from
V_AUD to G_AUD, no load, T
A
= +25°C, unless otherwise noted.)
AUDIO CROSSTALK vs. FREQUENCY
0
RL = 10kΩ to G_AUD
-10
-20
-30
-40
-50
-60
-70
CROSSTALK (dB)
-80
V = 0.5V
-90
-100
-110
-120
0.01 100
RMS
1010.1
FREQUENCY (kHz)
V_VID STANDBY QUIESCENT SUPPLY
CURRENT vs. TEMPERATURE
30
ALL VIDEO OUTPUT
AMPLIFIERS DISABLED
25
20
15
10
5
V_VID STANDBY SUPPLY CURRENT (mA)
0
0 255075
TEMPERATURE (°C)
V_VID QUIESCENT SUPPLY
CURRENT vs. TEMPERATURE
60
ALL VIDEO OUTPUT
58
AMPLIFIERS ENABLED
56
54
52
50
48
46
44
42
40
0 255075
TEMPERATURE (°C)
V12 QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
30
25
20
15
10
5
0
0 255075
TEMPERATURE (°C)
1
MAX4399 toc10
0.1
0.01
THD+N (%)
0.001
0.0001
0.01 100
2.0
MAX4399 toc13
1.8
1.6
1.4
1.2
1.0
0.8
0.6
V_DIG SUPPLY CURRENT (mA)
0.4
0.2
0
025
AUDIO THD+N vs. FREQUENCY
RL = 10kΩ to G_AUD
V = 1.5V
RMS
V = 1.0V
RMS
V = 0.5V
RMS
1010.1
FREQUENCY (kHz)
V_DIG QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
50
TEMPERATURE (°C)
MAX4399 toc11
V_VID QUIESCENT SUPPLY CURRENT (mA)
MAX4399 toc14
V12 SUPPLY CURRENT (mA)
75
MAX4399 toc12
MAX4399 toc15
V_AUD vs. TEMPERATURE
INPUT CLAMP AND BIAS LEVEL
10.0
9.5
9.0
8.5
8.0
V_AUD (V)
7.5
7.0
6.5
6.0
075
TEMPERATURE (°C)
5025
2.5
2.3
MAX4399 toc16
2.1
BIAS
1.9
1.7
1.5
BOTTOM-LEVEL
CLAMP
1.3
1.1
0.9
INPUT CLAMP AND BIAS LEVEL (V)
0.7
0.5
075
vs. TEMPERATURE
5025
TEMPERATURE (°C)
MAX4399 toc17
INPUT CLAMP CURRENT
vs. TEMPERATURE
6.0
VIN = 1.75V
5.5
5.0
4.5
4.0
3.5
3.0
2.5
INPUT CLAMP CURRENT (µA)
2.0
1.5
1.0
025
TEMPERATURE (°C)
MAX4399 toc18
50
75
MAX4399
Audio/Video Switch for Three SCART
Connectors
8 _______________________________________________________________________________________
Pin Description
Typical Operating Characteristics (continued)
(V
V12
= 12V, V
V_VID
= 5V, V
V_DIG
= 5V, 0.47µF ceramic X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from
V_AUD to G_AUD, no load, T
A
= +25°C, unless otherwise noted.)
INPUT CLAMP CURRENT
vs. INPUT VOLTAGE
MAX4399 toc19
INPUT VOLTAGE (V)
INPUT CLAMP CURRENT (mA)
4321
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
05
OUTPUT BIAS VOLTAGE
vs. TEMPERATURE
MAX4399 toc20
TEMPERATURE (°C)
OUTPUT BIAS VOLTAGE (V)
5025
0.5
1.0
1.5
2.0
2.5
0
075
RGB, LUMA, CVBS
CHROMA
PIN NAME FUNCTION
1 V_DIG Digital Supply Voltage. Connect to 5V.
2 DEV_ADDR
Device Address Set Input. Connect to G_DIG to set write and read addresses of 94h and 95h,
respectively. Connect to V_DIG to set write and read addresses of 96h and 97h, respectively.
3 SDA Bidirectional Data I/O. I2C-compatible, 2-wire interface data input/output. Output is open drain.
4 SCL Clock Input. I2C-compatible, 2-wire interface clock.
5 INTERRUPT_OUT
Interrupt Output. INTERRUPT_OUT is an open-drain output that goes high impedance to
indicate a change in the slow switch lines, AUX_SS, TV_SS, or VCR_SS.
6 G_DIG Digital Ground
7 ENC_L_IN Digital Encoder Left-Channel Audio Input
8 ST_AUX_IN Satellite Dish Tone Input
9 ENC_R_IN Digital Encoder Right-Channel Audio Input
10 AUD_BIAS
Audio Input Bias Voltage. Bypass AUD_BIAS with a 10µF capacitor and a 0.1µF capacitor to
G_AUD.
Audio Supply Voltage. Connect all V_AUD together. An on-board linear regulator creates the
11, 22, 30 V_AUD
12 AUX_L_IN AUX SCART Left-Channel Audio Input
13 AUX_R_IN AUX SCART Right-Channel Audio Input
14 VCR_R_IN VCR SCART Right-Channel Audio Input
15 VCR_L_IN VCR SCART Left-Channel Audio Input
16 TV_R_IN TV SCART Right-Channel Audio Input
+8V audio supply voltage from V12. Bypass pin 30 with a 10µF aluminum electrolytic capacitor
in parallel with a 0.47µF low-ESR ceramic capacitor to audio ground, and bypass pins 11 and
22 with 0.1µF capacitors to audio ground.
MAX4399
Audio/Video Switch for Three SCART
Connectors
_______________________________________________________________________________________ 9
Pin Description (continued)
PIN NAME FUNCTION
17 TV_L_IN TV SCART Left-Channel Audio Input
18, 26 G_AUD Audio Ground
19 AUX_L_OUT AUX SCART Left-Channel Audio Output
20 AUX_R_OUT AUX SCART Right-Channel Audio Output
21 VCR_R_OUT VCR SCART Right-Channel Audio Output
23 VCR_L_OUT VCR SCART Left-Channel Audio Output
24 PHONO_R_OUT Hi-Fi Right-Channel Audio Output
25 PHONO_L_OUT Hi-Fi Left-Channel Audio Output
27 RF_MONO_OUT RF Modulator Mono Audio Output
28 TV_L_OUT TV SCART Left-Channel Audio Output
29 TV_R_OUT TV SCART Right-Channel Audio Output
31 V12 +12V Supply. Bypass V12 with a 10µF capacitor in parallel with a 0.1µF capacitor to ground.
32 AUX_SS AUX SCART Bidirectional Slow-Switch Signal
33 TV_SS TV SCART Bidirectional Slow-Switch Signal
34 VCR_SS VCR SCART Bidirectional Slow-Switch Signal
Trap Filter. Connect a series RLC trap filter to eliminate the color subcarrier frequency
35 TRAP
36, 42, 50 G_VID Video Ground
37 TV_FS_OUT
38, 46, 61 V_VID
39 RF_CVBS_OUT RF Modulator Composite Video Output. Internally biased at 1.0V.
40 TV_Y/CVBS_OUT TV SCART Luma/Composite Video Output. Internally biased at 1.0V.
41 TV_R/C_OUT
43 TV_G_OUT TV SCART Green Video Output. Internally biased at 1.0V.
44 TV_B_OUT TV SCART Blue Video Output. Internally biased at 1.0V.
45 AUX_R/C_OUT
47 AUX_Y/CVBS_OUT AUX SCART Luma/Composite Video Output. Internally biased at 1.0V.
48 VCR_Y/CVBS_OUT VCR SCART Luma/Composite Video Output. Internally biased at 1.0V.
49 VCR_R/C_OUT
51 VID_BIAS
52 TV_R/C_IN TV SCART Red/Chroma Video Input. Internally biased at 1.22V for red, or 1.8V for chroma.
(4.43MHz) from the luma signal. The filter prevents cross-mixing of the color subcarriers when
the luma and chroma signals are added together to form a composite signal. Internally biased
at +0.5V.
TV SCART Fast-Switching Output. This signal is used to switch the TV to its RGB inputs for onscreen display purposes.
Video Supply. Bypass each V_VID with a 0.01µF capacitor to V_GND. Connect a 200nH ferrite
bead from V_VID to a 5V supply.
TV SCART Red/Chroma Video Output. Internally biased at 1.0V for red video signal and 2.1V
for chroma video signal.
AUX SCART Red/Chroma Video Output. Internally biased at 1.0V for red video signal and 2.1V
for chroma video signal.
VCR SCART Red/Chroma Video Output. Internally biased at 1.0V for red video signal and 2.1V
for chroma video signal.
Video Bias Voltage Output. VID_BIAS sets video bias level for chroma signals. Bypass
VID_BIAS with a low-ESR 0.1µF capacitor to G_VID.
MAX4399
Detailed Description
The MAX4399 audio/video switch matrix connects audio
and video signals between different ports. In the case of
a set-top box, the ports consist of the MPEG decoder
and three SCART connectors. For DVD+RW recorders
and some televisions, the ports consist of the main
board, front panel, tuner, and two SCART connectors.
The video section consists of input buffers, a crosspoint
switch, and output drivers that can be disabled. There
is also a mixer, which creates a composite video signal
from S-video. The video inputs can be set in either
clamp or bias mode. The red/chroma outputs have pulldowns that connect the outputs to video ground as
described in the Video Inputs section.
The audio section features input buffers, a crosspoint
switch, and output drivers. The TV audio path has volume control from -56dB to +6dB in 2dB steps. The VCR
and AUX audio paths have volume control from -6dB to
+6dB in 6dB steps. The MAX4399 can be configured to
switch inputs during a zero crossing to reduce clicks.
The MAX4399 can also switch volume levels during a
zero crossing to reduce zipper noise. The audio outputs can operate in different modes. For instance, left
and right audio channels can be swapped (see the
Audio Outputs section).
The MAX4399 has two fast-switching inputs and one
fast-switching output. Fast switching is used for creating on-screen displays by switching between the CVBS
and RGB signals. Under I
2
C-compatible control, the
fast-switching output can follow either of the fastswitching inputs or be set high or low.
The MAX4399 features three slow-switching input/outputs to support slow switching, which sets the screen
aspect ratio or video source of the display device. The
slow switching relies on tri-level logic in which the levels
are 0V, 6V, and 12V. The status of the slow-switching
input is continuously read and stored in register 0Eh. If
INTERRUPT_OUT is enabled, then INTERRUPT_OUT
changes to a high-impedance state if any of the slowswitching inputs change logic levels. The slow-switching
outputs can be set to a logic level or high impedance by
writing to registers 07h, 09h, or 0Bh.
The MAX4399 can be configured through an I
2
C-compatible interface. DEV_ADDR sets the I2C-compatible
address.
SCART Video Switching
The MAX4399 triple SCART audio/video switch
includes multiplexed video amplifiers and a Y-C mixerdriver with a trap filter to drive an RF modulator. The
MAX4399 switches video from an MPEG decoder output and TV, VCR, and AUX SCART connectors.
Audio/Video Switch for Three SCART
Connectors
10 ______________________________________________________________________________________
Pin Description (continued)
PIN NAME FUNCTION
53 TV_Y/CVBS_IN TV SCART Luma/Composite Video Input. Internally biased at 1.22V.
54 AUX_R/C_IN AUX SCART Red/Chroma Video Input. Internally biased at 1.22V for red, or 1.8V for chroma.
55 AUX_Y/CVBS_IN AUX SCART Luma/Composite Video. Internally biased at 1.22V.
56 VCR_Y/CVBS_IN VCR SCART Luma/Composite Video Input. Internally biased at 1.22V.
57 VCR_FS_IN VCR SCART Fast-Switching Input
58 VCR_R/C_IN VCR SCART Red/Chroma Video Input. Internally biased at 1.22V for red, or 1.8V for chroma.
59 VCR_G_IN VCR SCART Green Video Input. Internally biased at 1.22V.
60 VCR_B_IN VCR SCART Blue Video Input. Internally biased at 1.22V.
62 ENC_Y/CVBS_IN Digital Encoder Luma/Composite Video Input. Internally biased at 1.22V.
63 ENC_R/C_IN
64 ENC_G_IN Digital Encoder Green Video Input. Internally biased at 1.22V.
65 ENC_B_IN Digital Encoder Blue Video Input. Internally biased at 1.22V.
66 ENC_Y_IN Digital Encoder Luma Video Input. Internally biased at 1.22V.
67 ENC_C_IN Digital Encoder Chroma Video Input. Internally biased at 1.8V.
68 ENC_FS_IN Digital Encoder Fast-Switching Input
Digital Encoder Red/Chroma Video Input. Internally biased at 1.22V for red, or 1.8V for
chroma.
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