MAXIM MAX4399

19-2925; Rev 0; 8/03
KIT
ATION
EVALU
E
L
B
A
AVAIL
Audio/Video Switch for Three SCART
Connectors
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
Ordering Information
PART
PIN-PACKAGE
0°C to +70°C
68 Thin QFN
Typical Operating Circuit
VIDEO DIGITAL AUDIO
+5V
+12V
+5V
Applications
Satellite Receivers
TEMP RANGE
MAX4399CTK
STB
ENCODER
RGB
CVBS
S-VHS
S-VHS
CVBS
RGB
R/L AUDIO
R/L AUDIO
TV SCART
CONNECTOR
Satellite Set-Top Boxes
FAST SWITCHING
Cable Set-Top Boxes
MAX4399
FAST SWITCHING
I2C-COMPATIBLE
2-WIRE INTERFACE
Terrestrial Set-Top Boxes
SLOW SWITCHING
CVBS
Game Consoles
SATELLITE DISH
TVs
SCART
SWITCH
MATRIX
TONE INPUT
MONO AUDIO
CHANNEL
3/4 RF
MODULATOR
SUBCARRIER TRAP
CVBS
Digital Television (DTV)
S-VHS
VCRs
R/L PHONO AUDIO
DVD Players
DVD+R/W Players
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 components in an I2C system, provided that the system conforms
to the I2C Standard Specification as defined by Philips.
VCR SCART
CONNECTOR
RGB
CVBS
R/L AUDIO
S-VHS
FAST SWITCHING
R/L AUDIO
SLOW SWITCHING
SLOW SWITCHING
AUXILIARY
SCART
CONNECTOR
AUDIO
GROUND
VIDEO
GROUND
DIGITAL
GROUND
________________________________________________________________ Maxim Integrated Products
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
MAX4399
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.
MAX4399
Audio/Video Switch for Three SCART
Connectors
ABSOLUTE MAXIMUM RATINGS
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 (VV_VID + 0.3V)
V_AUD to G_AUD................................................-0.3V to +9V
Audio Inputs, Audio Outputs,
AUD_BIAS........................................-0.3V to (VV_AUD + 0.3V)
SDA, SCL, DEV_ADDR, INTERRUPT_OUT .........-0.3V to +6V
AUX_SS, TV_SS, VCR_SS ....................-0.3V to (VV12 + 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 (TA = +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
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.
ELECTRICAL CHARACTERISTICS
(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
DC
V12 Supply Voltage Range
Inferred from the slow switch output levels
11.4
12
12.6
V
V_VID Supply Voltage Range
Inferred from the output swing of the video
outputs
4.75
5
5.25
V
4.75
5
5.25
V
V_DIG Supply Voltage Range
V12 Quiescent Supply Current
17
35
mA
V_VID Quiescent Supply Current
All video output amplifiers are enabled, no
load
51
116
mA
V_VID Standby Supply Current
All video output amplifiers are in shutdown,
and TV_FS_OUT driver is in shutdown
19
34
mA
1
3
mA
V_DIG Quiescent Supply Current
VIDEO
Voltage Gain
1VP-P input
Small-Signal Bandwidth, -3dB
100mVP-P input,
gain = 6dB
Large-Signal Bandwidth, -3dB
1VP-P input, gain
= 6dB, TA =
+25°C (Note 2)
2
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
dB
MHz
27
MHz
R, G, B
30
_______________________________________________________________________________________
Audio/Video Switch for Three SCART
Connectors
(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
Slew Rate
SYMBOL
SR
Gain Matching
CONDITIONS
1VP-P input, between RGB or Y-C
Differential Gain
DG
Differential Phase
DP
Signal-to-Noise Ratio
SNR
MIN
1VP-P input, gain = 6dB
5-step
modulated
staircase
5-step
modulated
staircase
TYP
MAX
170
-0.5
0
RF_CVBS_OUT
0.03
All other video outputs
0.13
RF_CVBS_OUT
0.09
All other video outputs
0.36
UNITS
V/µs
+0.5
dB
%
degrees
1VP-P input
-86
RF_CVBS_OUT
5
All other video outputs
3
dB
Group Delay
f = 0.1MHz to
6MHz
Bottom Level Clamp
RGB, composite and luma, no signal, no
load
1.21
V
Chroma Bias
Chroma only, no signal, no load
1.88
V
Sync Crush
Percentage reduction in sync pulse
(0.3VP-P); inferred from input clamping
current with a 0.1µF coupling capacitor
Power-Supply Rejection Ratio
Input Impedance
Input Clamp Current
PSRR
-2
0
ns
+2
%
f = 100kHz, 0.5VP-P
60
dB
CVBS, Y, or RGB video input
4
MΩ
Chroma video input
11
kΩ
VIN = 1.75V
2.5
4.2
RGB, composite, and
luma
1.05
Chroma
2.24
8.0
µA
Output Bias Voltage
No signal, no
load
Pulldown Resistance
VCR_R/C_OUT, AUX_R/C_OUT,
TV_R/C_OUT
10
Ω
Crosstalk
f = 4.43MHz, 1VP-P input, between any two
active inputs
-63
dB
Mute Suppression
f = 4.43MHz, 1VP-P input, on one input
-65
dB
V
AUDIO
V_AUD Voltage
Generated by internal linear regulator
Voltage Gain
1.414VP-P input, gain = 0dB
-0.25
8.1
0
+0.25
dB
V
Gain Matching Between
Channels
1.414VP-P input, gain = 0dB
-0.5
0
+0.5
dB
Gain Flatness
f = 20Hz to 20kHz, 0.5VRMS input, gain =
0dB
0.005
dB
Frequency Bandwidth
0.5VRMS input; frequency where output is
-3dB with 1kHz serving as 0dB
210
kHz
_______________________________________________________________________________________
3
MAX4399
ELECTRICAL CHARACTERISTICS (continued)
MAX4399
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
Input DC Level
Gain = 0dB
Input Signal Amplitude
Inferred through total harmonic distortion
specification, f = 1kHz
MIN
TYP
MAX
UNITS
V_AUD/2
V
2
VRMS
Input Resistance
100
kΩ
Output DC Level
V_AUD/2
V
105
dB
Signal-to-Noise Ratio
SNR
f = 1.0kHz, 1VRMS, gain = 0dB, 20Hz to
20kHz
Total Harmonic Distortion
THD
RLOAD = 10kΩ
f = 1.0kHz, 0.5VRMS
0.002
f = 1.0kHz, 2VRMS
0.005
Output Impedance
%
Ω
0.5
1.414VP-P
input
Volume Attenuation Step
Power-Supply Rejection Ratio
PSRR
TV audio, volume control
range extends from -56dB
to +6dB
1.5
VCR, AUX audio
5.5
2
2.5
6
6.5
dB
f = 1kHz, 0.5VP-P
110
dB
Mute Suppression
f = 1kHz, 0.5VRMS input
105
dB
Audio Limiter Level
f = 1kHz, 2.5VRMS input
6.7
VP-P
Crosstalk
f = 1kHz, 0.5VRMS, gain = 0dB
105
dB
DIGITAL INTERFACE: SDA and SCL
Low-Level Input Voltage
VIL
High-Level Input Voltage
VIH
0.8
2.6
Hysteresis of Schmitt Trigger
Input
SDA Low-Level Output Voltage
Output Fall Time for SDA Line
V
ISINK = 3mA
0
0.4
ISINK = 6mA
0
0.6
400pF bus load
Spike Suppression
VIL = 0V, VIH = 5V
-10
Input Capacitance
ns
+10
µA
400
kHz
ns
5
SCL Clock Frequency
0
tHD,STA
Repeated start condition
V
250
50
Input Current
Hold Time
V
0.2
VOL
V
pF
0.6
µs
Low Period of SCL Clock
tLOW
1.3
µs
High Period of SCL Clock
tHIGH
0.6
µs
Setup Time for a Repeated Start
Condition
tSU,STA
0.6
µs
Data Hold Time
tHD,DAT
0
Data Setup Time
tSU,DAT
100
Maximum Receive SCL/SDA Rise
Time
4
tR
(Note 3)
0.9
µs
ns
300
_______________________________________________________________________________________
ns
Audio/Video Switch for Three SCART
Connectors
(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)
tF
20 +
0.1CB
ns
Setup Time for Stop Condition
tSU,STO
0.6
µs
Bus Free Time Between a Stop
and Start
tBUF
1.3
µs
OTHER DIGITAL PINS
DEV_ADDR Low Level
0.8
DEV_ADDR High Level
2.6
INTERRUPT_OUT Low Voltage
INTERRUPT_OUT sinking 1mA
INTERRUPT_OUT High Leakage
Current
VINTERRUPT_OUT = 5V
V
V
0.15
0.4
V
1
10
µA
SLOW SWITCHING
Input Low Level
0
2
V
Input Medium Level
4.5
7.0
V
Input High Level
9.5
Input Current
50
12.0
V
100
µA
Output Low Level
RLOAD = 10kΩ to ground
0
1.5
V
Output Medium Level (External
16/9)
RLOAD = 10kΩ to ground
5.0
6.5
V
Output High Level (External 4/3)
RLOAD = 10kΩ to ground
10
12
V
Input Low Level
0
0.4
V
Input High Level
1
3
V
1
10
µA
0.01
0.2
V
0.75
2
V
FAST SWITCHING
Input Current
Output Low Level
ISINK = 0.5mA
Output High Level
V_VID - VOH, ISOURCE = 20mA
0
Fast-Switching Output to RGB
Skew
Difference in propagation delays of fastswitching signal and RGB signals;
measured from 50% input transition to 50%
output transition
30
ns
Fast-Switching Output Rise Time
RLOAD = 150Ω to ground
30
ns
Fast-Switching Output Fall Time
RLOAD = 150Ω to ground
30
ns
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.
_______________________________________________________________________________________
5
MAX4399
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics
(VV12 = 12V, VV_VID = 5V, VV_DIG = 5V, 0.47µF ceramic X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from
V_AUD to G_AUD, no load, TA = +25°C, unless otherwise noted.)
-1
0
-1
-2
-2
-3
-3
-3
-4
-4
-4
-5
-5
-5
-6
-6
-6
Y VIDEO SMALL-SIGNAL BANDWIDTH
vs. FREQUENCY
VIDEO CROSSTALK
vs. FREQUENCY
0
-1
-2
VIN = 100mVP-P
RL = 150Ω to G_VID
-20
CROSSTALK (dB)
1
-30
-40
-60
-70
-4
-80
-5
-90
-100
-6
0.1
1
0.1
100
10
1
0
-0.1
-0.2
1
0.2
2
3
4
5
6
7
RL = 150Ω to G_VID
0.1
0
-0.1
-0.2
1
2
3
4
5
6
7
DIFFERENTIAL PHASE (deg)
0.1
0.2
RL = 150Ω to G_VID
0.1
100
10
RL = 150Ω to G_VID
0.1
0
-0.1
-0.2
1
2
0.2
3
4
5
6
7
4
5
6
7
RL = 150Ω to G_VID
0.1
0
-0.1
-0.2
1
2
3
3
0
0
-3
-0.1
-0.2
1
2
3
0.5
RL = 150Ω to G_VID
0.3
0.1
-0.1
-0.3
-0.5
1
2
3
4
5
6
7
-6
-9
-12
-15
VIN = 0.5VRMS
RL = 10kΩ to G_AUD
-18
4
5
6
7
0.1
1
10
FREQUENCY (kHz)
6
1000
AUDIO LARGE-SIGNAL
BANDWIDTH vs. FREQUENCY
MAX4399 toc08
TV_Y/CVBS_OUT
DIFFERENTIAL GAIN (%)
RF_CVBS_OUT (WITHOUT TRAP FILTER)
MAX4399 toc07
FREQUENCY (MHz)
RL = 150Ω to G_VID
100
10
FREQUENCY (MHz)
0.2
0.2
-50
-3
1
RF_CVBS_OUT (WITH TRAP FILTER)
DIFFERENTIAL PHASE (deg)
2
0.1
FREQUENCY (MHz)
0
-10
-2
100
10
DIFFERENTIAL GAIN (%)
1
FREQUENCY (MHz)
VIN = 100mVP-P
RL = 150Ω to G_VID
3
0.1
100
10
GAIN (dB)
1
FREQUENCY (MHz)
MAX4399 toc05
4
DIFFERENTIAL GAIN (%)
1
MAX4399 toc09
-1
2
MAX4399 toc06
0
VIN = 100mVP-P
RL = 150Ω to G_VID
3
GAIN (dB)
0
GAIN (dB)
1
0.1
GAIN (dB)
2
1
MAX4399 toc04
GAIN (dB)
2
VIN = 1VP-P
RL = 150Ω to G_VID
3
4
MAX4399 toc02
VIN = 1VP-P
RL = 150Ω to G_VID
3
4
MAX4399 toc01
4
RGB VIDEO SMALL-SIGNAL BANDWIDTH
vs. FREQUENCY
MAX4399 toc03
Y VIDEO LARGE-SIGNAL BANDWIDTH
vs. FREQUENCY
RGB VIDEO LARGE-SIGNAL BANDWIDTH
vs. FREQUENCY
DIFFERENTIAL PHASE (deg)
MAX4399
Audio/Video Switch for Three SCART
Connectors
_______________________________________________________________________________________
100
1000
Audio/Video Switch for Three SCART
Connectors
-20
-30
RL = 10kΩ to G_AUD
0.1
V = 1.5VRMS
THD+N (%)
-50
-60
-70
-80
-90
V = 1.0VRMS
0.01
V = 0.5VRMS
0.001
-100
-110
-120
V = 0.5VRMS
0.01
1
10
100
56
54
52
50
48
46
44
42
40
0.0001
0.01
0.1
1
10
0
100
25
50
FREQUENCY (kHz)
TEMPERATURE (°C)
V_VID STANDBY QUIESCENT SUPPLY
CURRENT vs. TEMPERATURE
V_DIG QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
V12 QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
15
10
5
1.6
1.4
1.2
1.0
0.8
0.6
30
0.4
75
MAX4399 toc15
1.8
V12 SUPPLY CURRENT (mA)
20
MAX4399 toc14
25
2.0
V_DIG SUPPLY CURRENT (mA)
ALL VIDEO OUTPUT
AMPLIFIERS DISABLED
25
20
15
10
5
0.2
0
0
0
25
50
75
0
50
0
75
25
50
TEMPERATURE (°C)
TEMPERATURE (°C)
V_AUD vs. TEMPERATURE
INPUT CLAMP AND BIAS LEVEL
vs. TEMPERATURE
INPUT CLAMP CURRENT
vs. TEMPERATURE
9.0
8.5
8.0
7.5
7.0
2.3
2.1
1.7
1.5
1.1
0.9
0.7
6.0
0.5
50
TEMPERATURE (°C)
75
BOTTOM-LEVEL
CLAMP
1.3
6.5
25
BIAS
1.9
6.0
VIN = 1.75V
5.5
75
MAX4399 toc18
9.5
2.5
MAX4399 toc17
MAX4399 toc16
10.0
0
25
TEMPERATURE (°C)
INPUT CLAMP AND BIAS LEVEL (V)
0
V_AUD (V)
ALL VIDEO OUTPUT
AMPLIFIERS ENABLED
58
FREQUENCY (kHz)
MAX4399 toc13
V_VID STANDBY SUPPLY CURRENT (mA)
30
0.1
INPUT CLAMP CURRENT (µA)
CROSSTALK (dB)
-40
60
V_VID QUIESCENT SUPPLY CURRENT (mA)
RL = 10kΩ to G_AUD
MAX4399 toc11
1
MAX4399 toc10
0
-10
V_VID QUIESCENT SUPPLY
CURRENT vs. TEMPERATURE
AUDIO THD+N vs. FREQUENCY
MAX4399 toc12
AUDIO CROSSTALK vs. FREQUENCY
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0
25
50
TEMPERATURE (°C)
75
0
25
50
75
TEMPERATURE (°C)
_______________________________________________________________________________________
7
MAX4399
Typical Operating Characteristics (continued)
(VV12 = 12V, VV_VID = 5V, VV_DIG = 5V, 0.47µF ceramic X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from
V_AUD to G_AUD, no load, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VV12 = 12V, VV_VID = 5V, VV_DIG = 5V, 0.47µF ceramic X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from
V_AUD to G_AUD, no load, TA = +25°C, unless otherwise noted.)
INPUT CLAMP CURRENT
vs. INPUT VOLTAGE
2.5
MAX4399 toc19
0.4
0.2
0.1
0
-0.1
-0.2
CHROMA
2.0
OUTPUT BIAS VOLTAGE (V)
0.3
MAX4399 toc20
OUTPUT BIAS VOLTAGE
vs. TEMPERATURE
0.5
INPUT CLAMP CURRENT (mA)
MAX4399
Audio/Video Switch for Three SCART
Connectors
1.5
RGB, LUMA, CVBS
1.0
-0.3
0.5
-0.4
-0.5
0
0
1
2
3
4
5
0
INPUT VOLTAGE (V)
25
50
75
TEMPERATURE (°C)
Pin Description
PIN
NAME
1
V_DIG
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
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
AUD_BIAS
Audio Input Bias Voltage. Bypass AUD_BIAS with a 10µF capacitor and a 0.1µF capacitor to
G_AUD.
10
8
FUNCTION
Digital Supply Voltage. Connect to 5V.
Digital Ground
Audio Supply Voltage. Connect all V_AUD together. An on-board linear regulator creates the
+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.
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
_______________________________________________________________________________________
Audio/Video Switch for Three SCART
Connectors
PIN
NAME
17
TV_L_IN
TV SCART Left-Channel Audio Input
FUNCTION
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
28
TV_L_OUT
TV SCART Left-Channel Audio Output
29
TV_R_OUT
TV SCART Right-Channel Audio Output
31
V12
32
AUX_SS
33
TV_SS
34
VCR_SS
35
TRAP
36, 42, 50
G_VID
RF Modulator Mono Audio Output
+12V Supply. Bypass V12 with a 10µF capacitor in parallel with a 0.1µF capacitor to ground.
AUX SCART Bidirectional Slow-Switch Signal
TV SCART Bidirectional Slow-Switch Signal
VCR SCART Bidirectional Slow-Switch Signal
Trap Filter. Connect a series RLC trap filter to eliminate the color subcarrier frequency
(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.
Video Ground
37
TV_FS_OUT
TV SCART Fast-Switching Output. This signal is used to switch the TV to its RGB inputs for onscreen display purposes.
38, 46, 61
V_VID
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.
39
RF_CVBS_OUT
40
TV_Y/CVBS_OUT
RF Modulator Composite Video Output. Internally biased at 1.0V.
TV SCART Luma/Composite Video Output. Internally biased at 1.0V.
TV SCART Red/Chroma Video Output. Internally biased at 1.0V for red video signal and 2.1V
for chroma video signal.
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
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.
52
TV_R/C_IN
TV SCART Red/Chroma Video Input. Internally biased at 1.22V for red, or 1.8V for chroma.
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.
_______________________________________________________________________________________
9
MAX4399
Pin Description (continued)
Audio/Video Switch for Three SCART
Connectors
MAX4399
Pin Description (continued)
PIN
NAME
53
TV_Y/CVBS_IN
FUNCTION
TV SCART Luma/Composite Video Input. Internally biased at 1.22V.
54
AUX_R/C_IN
55
AUX_Y/CVBS_IN
AUX SCART Red/Chroma Video Input. Internally biased at 1.22V for red, or 1.8V for chroma.
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
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 Luma/Composite Video Input. Internally biased at 1.22V.
Digital Encoder Red/Chroma Video Input. Internally biased at 1.22V for red, or 1.8V for
chroma.
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).
10
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 I2C-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 I2C-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
0.1µF
VGA
5dB, 6dB, 7dB
TV_R/C_OUT
PULLDOWN
75Ω
MAX4399
0.1µF
PIN 15
PIN 15
PIN 13
PIN 13
N
MAX4399
MAX4399
75Ω
VGA
5dB, 6dB, 7dB
TV_R/C_OUT
N
PULLDOWN
SCART
CABLE
TV_R/C_IN
CLAMP/BIAS
CLAMP/BIAS
TV_R/C_IN
SCART
CONNECTORS
VIDEO INPUT
CLAMP
CLAMP
VIDEO INPUT
Figure 1. Bidirectional SCART Pins
The inputs and outputs are grouped by SCART connectors: 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 connector pins. The MAX4399 supports connection of auxiliary
devices (DVD players, DVD+R/W recorders, game consoles, 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 signal (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 connect 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
MAX4399
Audio/Video Switch for Three SCART
Connectors
from the Y and C signals to drive the legacy
RF_CVBS_OUT output. The circuit is shown as a summing point with bias in Figure 2. The MAX4399 sums Y
and C to get CVBS, and the bias provides the DC levels
for offsetting the chroma signal. Again, loop-through is
not possible with S-VHS because the chroma SCART
pin is used for both input and output.
The MAX4399 supports the CVBS format, with inputs
from the VCR, MPEG decoder, TV, and auxiliary device.
Full loop-through is possible to all devices except the
MPEG decoder because the SCART connector has
separate input and output pins for the CVBS format.
Slow Switching
The MAX4399 supports the tri-level slow switching of
IEC 933-1, Amendment 1, which selects the aspect ratio
for the display device. Under I2C-compatible control,
the MAX4399 sets the slow-switching output levels. Table
1 shows the valid output levels of the slow-switching
signal and the corresponding operating modes of the
display device.
The slow-switching SCART pins are bidirectional. The
MAX4399 can set the slow-switch output drivers to highimpedance mode to receive signals. When enabled,
INTERRUPT_OUT becomes high impedance if the
voltage level changes on TV_SS, VCR_SS, or AUX_SS.
The VCR or MPEG decoder outputs a fast-switching
signal to the display device. The fast-switching signal
can also be set to a constant high or low through the 2wire interface. The pass-through delay from VCR to TV
or MPEG decoder to TV matches that of the RGB signals facilitating proper OSD insertion.
Video Outputs
The DC level at the video outputs is controlled so coupling capacitors are not required, and all of the video
outputs are capable of driving a 150Ω, back-terminated
coax load directly with respect to ground. Since some
televisions and VCRs use the horizontal sync height for
automatic gain control, the MAX4399 accurately reproduces the sync height to within ±2%.
Y/C Mixer and Trap Filter
The MAX4399 includes an on-chip mixer to produce
CVBS from Y and C. The Y signal input to the mixer has
an external trap filter connection, TRAP, to eliminate the
color subcarrier frequency (4.43MHz), preventing
cross-mixing of the subcarriers in the mixer. TRAP is
internally biased at 0.5V. Connect a series RLC filter to
G_VID, or leave TRAP unconnected if not used.
12
Table 1. Slow Switch Modes
SLOW-SWITCHING
SIGNAL VOLTAGE (V)
0 to 2
MODE
Display device uses an internal
source such as a built-in tuner to
provide a video signal
4.5 to 7
Display device uses a video signal
from the SCART connector and sets
the display to 16:9 aspect ratio
9.5 to 12.6
Display device uses a signal from a
SCART connector and sets the
display to 4:3 aspect ratio
SCART Audio Switching
Audio Inputs
The audio block has four stereo audio inputs from the TV,
VCR, and AUX SCART connectors, plus the MPEG
decoder. Additionally, the MAX4399 provides a satellite
tone input. Each input has a 100kΩ resistor connected to
an internally generated voltage equal to 0.5 x V_AUD.
There are three main sections—the TV channel, the VCR
channel, and the AUX channel.
Audio Outputs
Each channel has a stereo output and the TV channel
has an additional phono output and a mono output. The
phono outputs always follow the TV audio input selection. The mono output, a mix of the TV right and left
channels, drives the channel 3/4 RF modulator. The
three stereo outputs can be configured to normal
mode, swap mode, mono, both channels to right input,
and both channels to left input. The latter two modes
are useful if the left audio channel carries one language
and the right audio channel carries another language.
The phono output is ideal for connection to a hi-fi, and
carries the same signals as the TV output when
switched to normal mode.
The mono mixer, a resistor summer, attenuates the
amplitude of each of the two signals by 6dB. The 3dB
gain block, which follows the mono mixer (Figures 3
and 4), is a compromise between a 0dB gain block and
a 6dB gain block. If the left and right audio channels
were completely uncorrelated, then a 6dB gain block
could be used. If the left and right channels were completely correlated, then a 0dB block would have to be
used. In reality, most stereo audio channels are partially correlated and hence a 3dB gain block was used.
______________________________________________________________________________________
Audio/Video Switch for Three SCART
Connectors
CLAMP/BIAS
TV_Y/CVBS_IN
CLAMP
AUX_Y/CVBS_IN
CLAMP
AUX_R/C_IN
VCR_Y/CVBS_OUT
6dB
CLAMP/BIAS
VCR_B_IN
CLAMP
VCR_G_IN
CLAMP
6dB
VCR_R/C_IN
MAX4399
TV_R/C_IN
PULLDOWN
VCR_R/C_OUT
VCR_R/C_OUT
N
CLAMP/BIAS
VCR_FS_IN
0.7V
6dB
VCR_Y/CVBS_IN
CLAMP
ENC_Y/CVBS_IN
CLAMP
ENC_R/C_IN
ENC_G_IN
AUX_Y/CVBS_OUT
CLAMP/BIAS
ENC_B_IN
CLAMP
ENC_Y_IN
CLAMP
AUX_R/C_OUT
6dB
CLAMP
PULLDOWN
AUX_R/C_OUT
N
VGA
5dB, 6dB, OR 7dB
ENC_FS_IN
TV_R/C_OUT
0.7V
ENC_C_IN
PULLDOWN
TV_R/C_OUT
BIAS
N
VGA
5dB, 6dB, OR 7dB
BIAS
TV_G_OUT
VGA
5dB, 6dB, OR 7dB
TV_B_OUT
6dB
TV_Y/CVBS_OUT
0V
TV_FS_OUT
MAX4399
5V
2kΩ
MIXER
2kΩ
6dB
RF_CVBS_OUT
TRAP
Figure 2. MAX4399 Video Section Functional Diagram
______________________________________________________________________________________
13
MAX4399
Audio/Video Switch for Three SCART
Connectors
ENC_LB
STEN_LB
AUX_LB
VCR_LB
VCR_L_IN
TV_LB
ZCD
TO AUDIO
BLOCK 2
MUTE
0dB
MUTE
TV_L_IN
0dB
AUX_L_IN
0dB
0dB
PHONO_L_OUT
0dB
TV_L_OUT
ZCD
VOLUME CONTROL
+6dB TO -56dB
2dB STEPS
VOLUME BYPASS
SWITCHES
0dB
TV MONO
SWITCHES
ENC_L_IN
0dB
INPUT SOURCE
SWITCHES
MUTE
MUTE
3dB
6dB
ST_AUX_IN
0dB
0dB
RF_MONO_OUT
0dB
TV_R_OUT
0dB
PHONO_R_OUT
VAUD/2
VAUD/2
TV MONO
SWITCHES
MUTE
6dB
MAX4399
ENC_R_IN
0dB
AUX_R_IN
0dB
TV_R_IN
0dB
VCR_R_IN
0dB
0dB
VOLUME CONTROL
+6dB TO -56dB
2dB STEPS
ZCD
MUTE
ENC_RB
STEN_RB
TV_RB
AUX_RB
INPUT SOURCE
SWITCHES
VCR_RB
VOLUME BYPASS
SWITCHES
MUTE
TO AUDIO
BLOCK 2
Figure 3. MAX4399 Audio Functional Diagram (AUDIO BLOCK 1)
14
______________________________________________________________________________________
Audio/Video Switch for Three SCART
Connectors
-6dB, 0dB, 6dB
VOLUME CONTROL
VCR_LB
MAX4399
MUTE
VCR MONO
SWITCHES
TV_LB
0dB
0dB
VCR_L_OUT
0dB
VCR_R_OUT
0dB
AUX_L_OUT
0dB
AUX_R_OUT
AUX_LB
ENC_LB
STEN_LB
INPUT
SOURCE
SWITCHES
VAUD/2
3dB
FROM BUFFER OUTPUTS ON AUDIO BLOCK 1
VAUD/2
VCR MONO
SWITCHES
INPUT
SOURCE
SWITCHES
STEN_RB
ENC_RB
0dB
AUX_RB
TV_RB
-6dB, 0dB, 6dB
VOLUME CONTROL
VCR_RB
MUTE
MUTE
-6dB, 0dB, 6dB
VOLUME CONTROL
VCR_LB
AUX MONO
SWITCHES
TV_LB
0dB
AUX_LB
ENC_LB
STEN_LB
INPUT
SOURCE
SWITCHES
VAUD/2
3dB
FROM BUFFER OUTPUTS ON AUDIO BLOCK 1
VAUD/2
AUX MONO
SWITCHES
INPUT
SOURCE
SWITCHES
STEN_RB
ENC_RB
0dB
AUX_RB
TV_RB
-6dB, 0dB, 6dB
VOLUME CONTROL
VCR_RB
MUTE
MAX4399
Figure 4. Audio Functional Diagram (AUDIO BLOCK2)
______________________________________________________________________________________
15
MAX4399
Audio/Video Switch for Three SCART
Connectors
SDA
tSU, DAT
tBUF
tSU, STA
tHD, STA
tSU, STO
tHD, DAT
tLOW
SCL
tHIGH
tHD, STA
tR
tF
START CONDITION
REPEATED START CONDITION
STOP CONDITION
START CONDITION
Figure 5. Timing Diagram for SDA and SCL Signals
Zero-Cross (Clickless) Switching
The TV channel incorporates a zero-crossing detect
(ZCD) circuit that minimizes click noise due to abrupt
signal level changes that occur when switching between
audio signals at an arbitrary moment in time.
To implement the zero-cross function when switching
audio signals, set the ZCD bit by loading register 00h
through the I2C-compatible interface (if the ZCD bit is
not already set). Then set the mute bit high by loading
register 00h. Next, wait for a period of time long enough
for the audio signal to cross zero. This period is a function of the audio signal path’s low frequency 3dB corner (f L3dB ). For example, if f L3dB = 20Hz, the time
period to wait for zero cross is 1/20Hz or 50ms. Next,
set the appropriate TV switches using register 01h.
Finally, clear the mute bit (while leaving the ZCD bit
high) using register 00h. The MAX4399 switches the
signal out of mute at the next zero crossing.
To implement the zero-cross function for TV volume
changes, or for TV and phono volume bypass switching, simply ensure the ZCD bit in register 00h is set.
Volume Control
The TV channel volume control ranges from -56dB to
+6dB in 2dB increments. The VCR and AUX volume
control settings are programmable for -6dB, 0dB, and
+6dB. With the ZCD bit set, the TV volume control
switches only at zero crossings, thus minimizing click
noise. The TV outputs can bypass the volume control.
While the phono outputs always follow the TV audio
input selection, the phono outputs can either be
processed through the TV volume control or they can
bypass the TV volume control.
16
Digital Section
Serial Interface
The MAX4399 uses a simple 2-wire serial interface
requiring only two I/O lines (2-wire bus) of a standard
microprocessor (µP) port. The fast-mode I2C-compatible serial interface allows communication at data rates
up to 400kbps. Figure 5 shows the timing diagram for
signals on the 2-wire bus.
The two bus lines (SDA and SCL) must be high when the
bus is not in use. The MAX4399 is a slave device and
must be controlled by a bus master device. Figure 6
shows a typical application where multiple devices can
be connected to the bus provided they have different
address settings. External pullup resistors are not necessary on these lines (when driven by push-pull drivers),
though the MAX4399 can be used in applications where
pullup resistors are required to maintain compatibility
with existing circuitry. The serial interface operates at
SCL rates up to 400kHz. The SDA state is allowed to
change only while SCL is low, with the exception of
START and STOP conditions as shown in Figure 7.
SDA’s state is sampled, and therefore must remain stable while SCL is high. Data is transmitted in 8-bit bytes.
Nine clock cycles are required to transfer each byte to
the MAX4399. Release SDA during the 9th clock cycle
as the selected device acknowledges the receipt of the
byte, by pulling SDA low during this time. A series
resistor on the SDA line may be needed if the master’s
output is forced high while the selected device
acknowledges (Figure 6).
______________________________________________________________________________________
Audio/Video Switch for Three SCART
Connectors
µC
SDA
MAX4399
VDD
VDD
µC
SCL
SCL
SDA SCL
V_DIG
RS*
MAX4399
SCL
SDA
V_DIG
MAX4399
SCL
SDA
VDD
OTHER DEVICE #1
SCL
SDA
VDD
OTHER DEVICE #1
SCL
VDD
SDA
OTHER DEVICE #2
SCL
SDA
VDD
OTHER DEVICE #2
RS* IS OPTIONAL.
SDA
Figure 6. Multiple Devices Controlled by a 2-Wire Interface
Figure 8. A Typical I2C Interface Application
SDA
Digital Inputs and Interface Logic
SCL
START CONDITION
STOP CONDITION
Figure 7. Start and Stop Conditions on a 2-Wire Interface
The I2C-compatible, 2-wire interface has logic levels
defined as VOL = 0.8V and VOH = 2.0V. All of the inputs
include Schmitt-trigger buffers to accept slow-transition
interfaces. The digital inputs are compatible with 3V
CMOS logic levels.
I2C Compatibility
The MAX4399 is compatible with existing I2C systems.
SCL and SDA are high-impedance inputs. SDA has an
open drain that pulls the data line low during the 9th
clock pulse. Figure 8 shows a typical I 2C interface
application. The communication protocol supports the
standard I2C 8-bit communications. The general call
address is ignored, and CBUS formats are not supported.
The MAX4399 address is compatible with the 7-bit I2C
addressing protocol only. No 10-bit formats are supported. RESTART protocol is supported, but an immediate
STOP condition is necessary to update the MAX4399.
INTERRUPT_OUT Signal
INTERRUPT_OUT is an open-drain output that
becomes high impedance when a change in any of the
slow-switch signals occurs. Clear INTERRUPT_OUT by
setting bit 3 of register 04h low.
Data Format of the 2-Wire Interface
Write mode
S
Slave
Address
A
Register
Address
A
Data
A
P
A
Register
Address
A
Data
A
P
Read mode
S
Slave
Address
Where S = Start Condition, A = Acknowledge, P = Stop
Condition.
______________________________________________________________________________________
17
MAX4399
Audio/Video Switch for Three SCART
Connectors
2-Wire Interface Slave Address
Programming
Table 2. Slave Address Programming
Connect DEV_ADDR to G_DIG or V_DIG to set the
MAX4399 write and read addresses as shown in Table 2.
DEV_ADDR
CONNECTION
WRITE
ADDRESS
READ
ADDRESS
G_DIG
94h
95h
V_DIG
96h
97h
Data Register Writing and Reading
Program the SCART video and audio switches by writing to registers 00h through 0Dh (Tables 3 through 18).
Registers 00h through 0Dh can also be read, allowing
read-back of data after programming and facilitating
system debugging. The status register is read-only and
can be read from address 0Eh (Table 19).
Applications Information
Filtering of Encoder Outputs
The DAC outputs of encoder chips need to be
processed through a lowpass filter (reconstruction filter)
to attenuate out-of-band noise. Figure 9 shows how the
MAX7440 provides an integrated, convenient solution for
reconstruction filtering.
Table 3. Write Mode Input Data Format
REGISTER
ADDRESS
POR
VALUE
BIT 7
BIT 6
00h
47h
Not used
ZCD
01h
02h
03h
07h
07h
07h
Not used
Not used
VCR volume control
AUX volume control
04h
01h
Not used
05h
00h
06h
1Fh
07h
20h
Not used
08h
07h
VCR_R/C_IN
clamp
Not used
Not used
Not used
Not used
09h
00h
Not used
Not used
Not used
Not used
Not used
0Ah
07h
AUX_R/C_IN
clamp
Not used
Not used
Not used
Not used
0Bh
00h
Not used
Not used
Not used
Not used
Not used
18
0Ch
00h
0Dh
00h
ENC_R/C_IN
Clamp
TV_R/C_IN
clamp
Not used
AUX_Y/CVBS_
OUT
enable
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
TV audio
mute
Volume control
TV mono switch
VCR mono switch
AUX mono switch
Not used
Not used
Not used
Interrupt
enable
Not used
Not used
Not used
Not used
RGB gain
TV G and B video
switch
RF_CVBS_OUT TV_Y/CVBS_
switch
OUT switch
TV fast switch
BIT 0
TV audio selection
VCR audio selection
AUX audio selection
Phono
TV volume
volume
Not used
bypass
bypass
Not used
Not used
Not used
TV video switch
TV_R/C_OUT
ground
Set TV slow switch
VCR video switch
VCR_R/C_
OUT
ground
Set VCR slow switch
AUX video switch
AUX_R/C_
OUT ground
Set AUX slow switch
VCR_Y/
VCR_R/
CVBS_
C_OUT
Not used
Not used
Not used Not used
Not used
OUT
enable
enable
TV_FB_ RF_CVBS_
AUX_R/C_OUT TV_R/C_OUT TV_G_OUT TV_B_OUT TV_Y/CVBS_
OUT
OUT
enable
enable
enable
enable
OUT enable
enable
enable
______________________________________________________________________________________
Audio/Video Switch for Three SCART
Connectors
MAX4399
+5V
+5V
0.1µF
1µF
V_VID
MPEG DECODER
MAX7440
MAX4399
0.1µF
CVBS D/A
IN1
LOWPASS FILTER
A = +1V/V
LOWPASS FILTER
A = +1V/V
LOWPASS FILTER
A = +1V/V
OUT1
ENC_Y/CVBS_IN
CLAMP
0.1µF
Y D/A
IN2
OUT2
ENC_Y_IN
CLAMP
0.1µF
C D/A
IN3
OUT3
ENC_C_IN
BIAS
0.1µF
R D/A
IN4
LOWPASS FILTER
A = +1V/V
LOWPASS FILTER
A = +1V/V
LOWPASS FILTER
A = +1V/V
OUT4
ENC_R/C_IN
CLAMP
0.1µF
G D/A
IN5
OUT5
ENC_G_IN
CLAMP
0.1µF
B D/A
IN6
OUT6
ENC_B_IN
CLAMP
G_VID
Figure 9. MPEG Decoder Outputs Filtered by the MAX7440 Before Being Passed to the MAX4399
Hot-Plug of SCART Connectors—Floating
Chassis Discharge
The MAX4399 features high-ESD protection on all
SCART inputs and outputs, and requires no external
transient voltage suppressor (TVS) devices to protect
against floating chassis discharge. Some set-top boxes
have a floating chassis problem in which the chassis is
not connected to earth ground. As a result, the chassis
can charge up to 500V. When a SCART cable is con-
nected to the SCART connector, the charged chassis
can discharge through a signal pin. The equivalent circuit is a 2200pF capacitor charged to 311V connected
through less than 0.1Ω to a signal pin. The MAX4399 is
soldered on the PC board when it experiences such a
discharge. Therefore, the current spike flows through
the ESD protection diodes and is absorbed by the supply bypass capacitors, which have high capacitance
and low ESR.
______________________________________________________________________________________
19
TV_R/C_IN_SC
TV_Y/CVBS_IN_SC
AUX_R/C_IN_SC
AUX_Y/CVBS_IN_SC
VCR_Y/CVBS_IN_SC
VCR_FS_IN_SC
VCR_R/C_IN_SC
VCR_G_IN_SC
VCR_B_IN_SC
ENC_Y/CVBS_IN_SC
ENC_R/C_IN_SC
ENC_G_IN_SC
ENC_B_IN_SC
ENC_Y_IN_SC
ENC_C_IN_SC
ENC_FS_IN
MAX4399
Audio/Video Switch for Three SCART
Connectors
0.01µF
200nH
+5V VIDEO
SUPPLY
10µF
VCR_FS_IN
54
53
52
TV_R/C_IN
55
TV_Y/CVBS_IN
56
AUX_R/C_IN
57
AUX_Y/CVBS_IN
58
VCR-Y/CVBS_IN
59
VCR_R/C_IN
60
V_VID
ENC_G_IN
61
VCR_G_IN
62
VCR_B_IN
63
ENC_Y/CVBS_IN
64
ENC_B_IN
ENC_Y_IN
65
ENC_R/C_IN
V_DIG
66
ENC_C_IN
+5V DIGITAL
SUPPLY
0.1µF
1
67
ENC_FS_IN
68
VID_BIAS
51
10µF
AUX_R/C_OUT
ST_AUX_IN
TV_B_OUT
ENC_R_IN
TV_R_IN
G_VID
19
20
10µF
AUX_R_OUT_SC
AUX_L_OUT_SC
10µF
21
22
23
10µF
24
10µF
25
10µF
26
27
10µF
28
10µF
29
10µF
10µF
30
0.47µF
10µF
31
32
10kΩ
33
10kΩ
34
10kΩ
VCR_SS
18
TRAP
VCR_SS
TV_L_IN
TV_SS
17
TV_FS_OUT
TV_SS
16
VCR_L_IN
AUX_SS
10kΩ
V_VID
PHONO_L_OUT
10kΩ
VCR_R_IN
PHONO_R_OUT
15
PHONO_R_OUT_SC
TV_L_IN_SC
10kΩ
RF_CVBS_OUT
VCR_L_OUT
TV_R_IN_SC
14
AUX_R_IN
VCR_L_OUT_SC
VCR_L_IN_SC
10kΩ
TV_Y/CVBS_OUT
V_AUD
VCR_R_IN_SC
13
AUX_L_IN
VCR_R_OUT
AUX_R_IN_SC
10kΩ
TV_R/C_OUT
VCR_R_OUT_SC
AUX_L_IN_SC
12
V_AUD
AUX_R_OUT
10kΩ
G_VID
AUX_L_OUT
11
AUD_BIAS
G_AUD
10
10µF
TV_G_OUT
MAX4399
ENC_R_IN_SC
AUX_SS
9
ENC_L_IN
+12V
10kΩ
V_VID
V12
8
G_DIG
V_AUD
10kΩ
AUX_Y/CVBS_OUT
TV_R_OUT
ST_AUX_IN_SC
7
INTERRUPT_OUT
TV_R_OUT_SC
ENC_L_IN_SC
VCR_Y/CVBS_OUT
TV_L_OUT
6
10kΩ
SCL
TV_L_OUT_SC
INTERRUPT_OUT
VCR_R/C_OUT
RF_MONO_OUT
5
SDA
RF_MONO_OUT_SC
4
SCL
G_VID
G_AUD
3
SDA
DEV_ADDR
PHONO_L_OUT_SC
2
DEV_ADDR
10µF
ALL CAPACITORS ARE 0.1µF AND ALL RESISTORS ARE 75Ω, UNLESS OTHERWISE NOTED.
Figure 10. Floating Chassis Discharge Protection Circuit
20
______________________________________________________________________________________
50
49
VCR_R/C_OUT_SC
48
VCR_Y/CVBS_OUT_SC
47
46
AUX_Y/CVBS_OUT_SC
0.01µF
45
AUX_R/C_OUT_SC
44
TV_B_OUT_SC
43
TV_G_OUT_SC
42
41
TV_R/C_OUT_SC
40
TV_Y/CVBS_OUT_SC
39
38
RF_CVBS_OUT_SC
0.01µF
37
TV_FS_OUT_SC
36
35
1.8kΩ
22µH
22pF
Audio/Video Switch for Three SCART
Connectors
MAX4399
Read Mode: Output Data Format
Table 4. Read Mode Output Data Format
REGISTER
ADDRESS
BIT 7
BIT 6
0Eh
Not used
Power-on
reset
BIT 5
BIT 4
BIT 3
AUX slow switch status
BIT 2
BIT 1
VCR slow switch status
BIT 0
TV slow switch status
Write Mode: Description of Registers
Table 5. Register 00h: Audio Control
DESCRIPTION
TV Audio Mute
Volume Control
Zero-Crossing Detector
BIT
7
—
—
—
—
—
—
—
—
—
—
—
—
—
6
—
—
—
—
—
—
—
—
—
—
—
0
1
5
—
—
0
0
0
0
0
0
—
1
1
—
—
4
—
—
0
0
0
0
0
0
—
1
1
—
—
To better protect the MAX4399 against excessive voltages during the cable discharge event, additional 75Ω
resistors should be placed in series with all inputs and
outputs that go to the SCART connector (Figure 10).
For harsh environments needing ±15kV protection, the
MAX4385E and MAX4386E single and quad highspeed op amps feature the industry’s first integrated
±15kV ESD protection on video inputs and outputs.
Power Supplies and Bypassing
The MAX4399 features single +5V and +12V supply
operation, and requires no negative supply. The +12V
supply provides voltage for SCART function switching,
and provides power for the internally generated audio
supply, V_AUD. Place all bypass capacitors as close
as possible to the MAX4399. Bypass V12 to ground
with a 10µF capacitor in parallel with a 0.1µF ceramic
capacitor. Connect all V_AUD pins together and
bypass pin 30 with a 10µF electrolytic capacitor in parallel with a 0.47µF low-ESR ceramic capacitor to audio
ground. Bypass V_AUD pins 11 and 22 each with a
0.1µF capacitor to audio ground. Bypass AUD_BIAS to
3
—
—
0
0
0
0
1
1
—
1
1
—
—
2
—
—
0
0
1
1
0
0
—
1
1
—
—
1
—
—
0
1
0
1
0
1
—
0
1
—
—
0
0
1
—
—
—
—
—
—
—
—
—
—
—
COMMENTS
Off
On (power-on default)
+6dB gain
+4dB gain
+2dB gain
0dB gain (power-on default)
-2dB gain
-4dB gain
—
-54dB gain
-56dB gain
Off
On (power-on default)
audio ground with a 10µF electrolytic in parallel with a
0.1µF ceramic capacitor.
Bypass V_DIG with a 0.1µF ceramic capacitor to digital
ground. Bypass each V_VID to video ground with a
0.01µF ceramic capacitor. Connect V_VID in series with
a 200nH ferrite bead to the +5V supply. Bypass the
internally generated video bias, VID_BIAS with a 0.1µF
low-ESR ceramic capacitor to G_VID.
Layout and Grounding
For optimal performance, use controlled-impedance
traces for video signal paths, and place input termination resistors and output back-termination resistors
close to the MAX4399. Avoid running video traces parallel to high-speed data lines.
The MAX4399 provides separate ground connections for
video, audio, and digital supplies. For best performance
use separate ground planes for each of the ground
returns, and connect all three ground planes together at a
single point. Refer to the MAX4399 evaluation kit for a
proven circuit board layout example.
______________________________________________________________________________________
21
MAX4399
Audio/Video Switch for Three SCART
Connectors
Table 6. Register 01h: TV Audio
DESCRIPTION
Input Source for TV Audio
TV Mono Switch Settings
22
7
—
—
—
—
—
—
—
—
6
—
—
—
—
—
—
—
—
5
—
—
—
—
—
—
—
—
BIT
4
3
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2
0
0
0
0
1
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
—
—
—
—
—
—
—
—
—
—
0
0
0
—
—
—
L
R
—
—
—
—
0
0
0
1
1
0
—
—
—
—
—
—
R+L
R
R+L
L
—
—
0
1
1
—
—
—
R
R
—
—
1
0
0
—
—
—
L
L
—
—
—
—
—
—
1
1
1
0
1
1
1
0
1
—
—
—
—
—
—
—
—
—
L
L
L
R
R
R
COMMENTS
Encoder audio
VCR audio
AUX audio
TV audio
Encoder audio + tones
Mute
Mute
Mute (power-on default)
L CHANNEL R CHANNEL
OUTPUT
OUTPUT
______________________________________________________________________________________
—
Normal
(power-on
default)
Mono mix
Swap
R channel
only
L channel
only
Normal
Normal
Normal
Audio/Video Switch for Three SCART
Connectors
MAX4399
Table 7. Register 02h: VCR Audio
DESCRIPTION
Input Source for VCR Audio
VCR Mono Switch Settings
VCR Volume Control
7
—
—
—
—
—
—
—
—
6
—
—
—
—
—
—
—
—
5
—
—
—
—
—
—
—
—
BIT
4
3
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2
0
0
0
0
1
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
—
—
—
—
—
—
—
—
—
—
0
0
0
—
—
—
—
—
—
—
0
0
0
1
1
0
—
—
—
—
—
—
—
—
0
1
1
—
—
—
—
—
1
0
0
—
—
—
—
—
—
0
0
1
1
—
—
—
0
1
0
1
1
1
1
—
—
—
—
0
1
1
—
—
—
—
1
0
1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
COMMENTS
Encoder audio
VCR audio
AUX audio
TV audio
Encoder audio + tones
Mute
Mute
Mute (power-on default)
L CHANNEL R CHANNEL
OUTPUT
OUTPUT
—
Normal
(power-on
default)
R+L
R+L
Mono mix
R
L
Swap
R-channel
R
R
only
L-channel
L
L
only
L
R
Normal
L
R
Normal
L
R
Normal
0dB (power-on default)
+6dB
0dB
-6dB
L
R
______________________________________________________________________________________
23
MAX4399
Audio/Video Switch for Three SCART
Connectors
Table 8. Register 03h: AUX Audio
DESCRIPTION
Input Source for AUX Audio
AUX Mono Switch Settings
AUX Volume Control
24
BIT
7
—
—
—
—
—
—
—
—
6
—
—
—
—
—
—
—
—
5
—
—
—
—
—
—
—
—
4
—
—
—
—
—
—
—
—
3
—
—
—
—
—
—
—
—
2
0
0
0
0
1
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
—
—
—
—
—
—
—
—
—
—
0
0
0
—
—
—
—
—
—
—
0
0
0
1
1
0
—
—
—
—
—
—
—
—
0
1
1
—
—
—
—
—
1
0
0
—
—
—
—
—
—
0
0
1
1
—
—
—
0
1
0
1
1
1
1
—
—
—
—
0
1
1
—
—
—
—
1
0
1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
COMMENTS
Encoder audio
VCR audio
AUX audio
TV audio
Encoder audio + tones
Mute
Mute
Mute (power-on default)
L CHANNEL R CHANNEL
OUTPUT
OUTPUT
—
Normal
(power-on
default)
R+L
R+L
Mono mix
R
L
Swap
R channel
R
R
only
L channel
L
L
only
L
R
Normal
L
R
Normal
L
R
Normal
0dB (power-on default)
+6dB
0dB
-6dB
L
R
______________________________________________________________________________________
Audio/Video Switch for Three SCART
Connectors
DESCRIPTION
Phono Volume Bypass
TV Volume Bypass
Interrupt Enable
BIT
COMMENTS
7
6
5
4
3
2
1
0
—
—
—
—
—
—
0
—
—
—
—
—
—
—
1
—
—
—
—
—
—
0
—
—
—
—
—
—
—
1
—
—
—
—
—
—
0
—
—
—
—
—
—
—
1
—
—
—
Phono audio passes through volume
control (power-on default)
Phono audio bypasses volume control
TV audio passes through volume control
(power-on default)
TV audio bypasses volume control
Clear INTERRUPT_OUT (power-on
default)
Enable INTERRUPT_OUT
Table 10. Register 05h: Encoder Video Input Control
DESCRIPTION
ENC_R/C_IN Clamp/Bias
BIT
7
6
5
4
3
2
1
0
0
—
—
—
—
—
—
—
1
—
—
—
—
—
—
—
COMMENTS
DC restore clamp active at input
(power-on default)
Chroma bias applied at input
Table 11. Register 06h: TV Video Input Control
DESCRIPTION
Input Sources for TV Video
Input Sources for TV_G_OUT and
TV_B_OUT
RGB Gain
TV_R/C_IN Clamp/Bias
7
—
—
—
—
—
—
—
6
—
—
—
—
—
—
—
5
—
—
—
—
—
—
—
BIT
4
3
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2
—
0
0
0
0
1
1
1
—
0
0
1
1
0
0
0
—
0
1
0
1
0
1
—
—
—
—
1
1
0
—
—
—
—
—
—
1
1
1
—
—
—
—
—
—
—
—
—
—
—
—
—
0
0
1
—
0
1
0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1
1
—
—
—
—
—
—
—
0
0
1
1
0
1
0
1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0
—
—
—
—
—
—
—
1
—
—
—
—
—
—
—
COMMENTS
TV_Y/CVBS_OUT
ENC_Y/CVBS_IN
ENC_Y_IN
VCR_Y/CVBS_IN
AUX_Y/CVBS_IN
TV_Y/CVBS_IN
Mute
TV_R/C_OUT
ENC_R/C_IN
ENC_C_IN
VCR_R/C_IN
AUX_R/C_IN
TV_R/C_IN
Mute
Mute
Mute
Mute (power-on
Mute (power-on
default)
default)
TV_G_OUT
TV_B_OUT
ENC_G_IN
ENC_B_IN
VCR_G_IN
VCR_B_IN
Mute
Mute
Mute (power-on
Mute (power-on
default)
default)
6dB (power-on default)
7dB
5dB
5dB
DC restore clamp active at input (poweron default)
Chroma bias applied at input
______________________________________________________________________________________
25
MAX4399
Table 9. Register 04h: Volume Control Bypass
MAX4399
Audio/Video Switch for Three SCART
Connectors
Table 12. Register 07h: TV Video Output Control
DESCRIPTION
Set TV Slow Switching
BIT
7
6
5
4
3
2
1
0
—
—
—
—
—
—
0
0
—
—
—
—
—
—
0
1
—
—
—
—
—
—
1
0
—
—
—
—
—
—
1
1
—
—
—
—
—
0
—
—
—
—
—
—
—
1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0
0
1
1
0
1
0
1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0
—
—
—
—
—
—
—
1
—
—
—
—
—
—
0
—
—
—
—
—
—
1
—
—
—
—
—
TV_R/C_OUT Ground
Fast Switching
TV_Y/CVBS_OUT Switch
RF_CVBS_OUT Switch
COMMENTS
Low (<2V) internal source (power-on
default)
Medium (4.5V to 7V). External SCART
source with 16:9 aspect ratio.
High impedance
High (>9.5V). External SCART source
with 4:3 aspect ratio.
Normal operation. Pulldown on
TV_R/C_OUT is off (power-on default).
Ground. Pulldown on TV_R/C_OUT is
on. The output amplifier driving
TV_R/C_OUT turns off.
0 (power-on default)
Same level as ENC_FS_IN
Same level as VCR_FS_IN
V_VID
Composite video from the Y/C mixer is
output
The TV_Y/CVBS_OUT signal selected in
register 06h is output (power-on default)
Composite video from the Y/C mixer is
output (power-on default)
The TV_Y/CVBS_OUT signal selected in
register 06h is output
Table 13. Register 08h: VCR Video Input Control
DESCRIPTION
Input Sources for VCR Video
VCR_R/C_IN Clamp/Bias
26
7
—
—
—
—
—
—
—
—
6
—
—
—
—
—
—
—
—
5
—
—
—
—
—
—
—
—
BIT
4
3
— —
— —
— —
— —
— —
— —
— —
— —
2
—
0
0
0
0
1
1
1
1
—
0
0
1
1
0
0
1
0
—
0
1
0
1
0
1
0
—
—
—
—
—
1
1
1
0
—
—
—
—
—
—
—
1
—
—
—
—
—
—
—
COMMENTS
VCR_Y/CVBS_OUT
VCR_R/C_OUT
ENC_Y/CVBS_IN
ENC_R/C_IN
ENC_Y_IN
ENC_C_IN
VCR_Y/CVBS_IN
VCR_R/C_IN
AUX_Y/CVBS_IN
AUX_R/C_IN
TV_Y/CVBS_IN
TV_R/C_IN
Mute
Mute
Mute
Mute
Mute (power-on
Mute (power-on
default)
default)
DC restore clamp active at input (poweron default)
Chroma bias applied at input
______________________________________________________________________________________
Audio/Video Switch for Three SCART
Connectors
DESCRIPTION
Set VCR Slow Switching
BIT
COMMENTS
7
6
5
4
3
2
1
0
—
—
—
—
—
—
0
0
—
—
—
—
—
—
0
1
—
—
—
—
—
—
1
0
—
—
—
—
—
—
1
1
—
—
—
—
—
0
—
—
Normal operation. Pulldown on
TV_R/C_OUT is off (power-on default)
—
—
—
—
—
1
—
—
Ground. Pulldown on TV_R/C_OUT is on.
The output amplifier driving
VCR_R/C_OUT turns off.
Low (<2V) internal source (power-on
default)
Medium (4.5V to 7V). External SCART
source with 16:9 aspect ratio.
High impedance
High (>9.5V). External SCART source with
4:3 aspect ratio.
VCR_R/C_OUT Ground
Table 15. Register 0Ah: AUX Video Input Control
DESCRIPTION
Input Sources for AUX Video
AUX_R/C_IN Clamp/Bias
7
—
—
—
—
—
—
—
—
6
—
—
—
—
—
—
—
—
5
—
—
—
—
—
—
—
—
BIT
4
3
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2
—
0
0
0
0
1
1
1
1
—
0
0
1
1
0
0
1
0
—
0
1
0
1
0
1
0
—
—
—
—
—
1
1
1
0
—
—
—
—
—
—
—
1
—
—
—
—
—
—
—
COMMENTS
AUX_Y/CVBS_OUT
AUX_R/C_OUT
ENC_Y/CVBS_IN
ENC_R/C_IN
ENC_Y_IN
ENC_C_IN
VCR_Y/CVBS_IN
VCR_R/C_IN
AUX_Y/CVBS_IN
AUX_R/C_IN
TV_Y/CVBS_IN
TV_R/C_IN
Mute
Mute
Mute
Mute
Mute (power-on
Mute (power-on
default)
default)
DC restore clamp active at input (poweron default)
Chroma bias applied at input
Table 16. Register 0Bh: AUX Video Output Control
DESCRIPTION
Set AUX Slow Switching
BIT
7
6
5
4
3
2
1
0
—
—
—
—
—
—
0
0
—
—
—
—
—
—
0
1
—
—
—
—
—
—
1
0
—
—
—
—
—
—
1
1
—
—
—
—
—
0
—
—
—
—
—
—
—
1
—
—
AUX_R/C_OUT Ground
COMMENTS
Low (<2V). Internal source (power-on
default).
Medium (4.5V to 7V). External SCART
source with 16:9 aspect ratio.
High impedance
High (>9.5V). External SCART source
with 4:3 aspect ratio.
Normal operation. Pulldown on
TV_R/C_OUT is off (power-on default).
Ground. Pulldown on TV_R/C_OUT is
on. The output amplifier driving
AUX_R/C_OUT turns off.
______________________________________________________________________________________
27
MAX4399
Table 14. 09h: VCR Video Output Control
MAX4399
Audio/Video Switch for Three SCART
Connectors
Table 17. Register 0Ch: Output Enable
DESCRIPTION
VCR_R/C_OUT
VCR_Y/CVBS_OUT
7
—
—
—
—
6
—
—
—
—
5
—
—
—
—
BIT
4
3
—
—
—
—
—
—
—
—
2
—
—
—
—
1
—
—
0
1
0
0
1
—
—
5
—
—
—
—
—
—
—
—
—
—
0
1
—
—
—
—
BIT
4
3
—
—
—
—
—
—
—
—
—
—
—
—
—
0
—
1
0
—
1
—
—
—
—
—
—
—
—
—
—
—
—
—
2
—
—
—
—
0
1
—
—
—
—
—
—
—
—
—
—
1
—
—
0
1
—
—
—
—
—
—
—
—
—
—
—
—
0
0
1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
COMMENTS
Off (power-on default)
On
Off (power-on default)
On
Table 18. Register 0Dh: Output Enable
DESCRIPTION
RF_CVBS_OUT
TV_FS_OUT
TV_Y/CVBS_OUT
TV_B_OUT
TV_G_OUT
TV_R/C_OUT
AUX_R/C_OUT
AUX_Y/CVBS_OUT
28
7
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0
1
6
—
—
—
—
—
—
—
—
—
—
—
—
0
1
—
—
COMMENTS
Off (power-on default)
On
Off (power-on default)
On
Off (power-on default)
On
Off (power-on default)
On
Off (power-on default)
On
Off (power-on default)
On
Off (power-on default)
On
Off (power-on default)
On
______________________________________________________________________________________
Audio/Video Switch for Three SCART
Connectors
Table 19. Register 0Eh: Status
DESCRIPTION
TV Slow Switch Status
VCR Slow Switch Status
AUX Slow Switch Status
BIT
7
—
6
—
5
—
4
—
3
—
2
—
1
0
0
0
—
—
—
—
—
—
0
1
—
—
—
—
—
—
1
0
—
—
—
—
—
—
1
1
—
—
—
—
0
0
—
—
—
—
—
—
0
1
—
—
—
—
—
—
1
0
—
—
—
—
—
—
1
1
—
—
—
—
0
0
—
—
—
—
—
—
0
1
—
—
—
—
—
—
1
0
—
—
—
—
—
—
1
1
—
—
—
—
—
0
—
—
—
—
—
—
—
1
—
—
—
—
—
—
Power-On Reset
COMMENTS
0 to 2V; internal source
4.5V to 7V; external source with 16:9
aspect ratio
Not used
9.5V to 12.6V; external source with 4:3
aspect ratio
0 to 2V; internal source
4.5V to 7V; external source with 16:9
aspect ratio
Not used
9.5V to 12.6V; external source with 4:3
aspect ratio
0 to 2V; internal source
4.5V to 7V; external source with 16:9
aspect ratio
Not used
9.5V to 12.6V; external source with 4:3
aspect ratio
V_DIG is too low for digital logic to
operate
V_DIG is high enough for digital logic to
operate
______________________________________________________________________________________
29
MAX4399
Read Mode: Description of Register
Audio/Video Switch for Three SCART
Connectors
TV_R/C_IN_SC
TV_Y/CVBS_IN_SC
AUX_R/C_IN_SC
AUX_Y/CVBS_IN_SC
VCR_Y/CVBS_IN_SC
VCR_FS_IN_SC
VCR_R/C_IN_SC
VCR_G_IN_SC
VCR_B_IN_SC
ENC_Y/CVBS_IN_SC
ENC_R/C_IN_SC
ENC_G_IN_SC
ENC_B_IN_SC
ENC_Y_IN_SC
ENC_C_IN_SC
ENC_FS_IN
MAX4399
Typical Application Circuit
200nH
0.01µF
+5V VIDEO
SUPPLY
10µF
VCR_FS_IN
54
53
52
TV_R/C_IN
55
TV_Y/CVBS_IN
56
AUX_R/C_IN
57
AUX_Y/CVBS_IN
58
VCR-Y/CVBS_IN
59
VCR_R/C_IN
60
V_VID
ENC_G_IN
61
VCR_G_IN
62
VCR_B_IN
63
ENC_Y/CVBS_IN
64
ENC_B_IN
ENC_Y_IN
65
ENC_R/C_IN
V_DIG
66
ENC_C_IN
+5V DIGITAL
SUPPLY
1
67
ENC_FS_IN
68
VID_BIAS
51
10µF
AUX_R/C_OUT
ST_AUX_IN
TV_B_OUT
ENC_R_IN
V_VID
VCR_L_IN
TV_FS_OUT
TV_R_IN
G_VID
20
21
10µF
AUX_R_OUT_SC
AUX_L_OUT_SC
10µF
22
23
10µF
24
10µF
25
10µF
26
27
10µF
28
10µF
29
10µF
30
10µF
10µF
31
10kΩ
VCR_SS
TV_SS
32
33
10kΩ
34
10kΩ
0.47µF
VCR_SS
19
TV_SS
18
TRAP
AUX_SS
TV_L_IN
PHONO_L_OUT
PHONO_R_OUT
17
VCR_R_IN
PHONO_R_OUT_SC
TV_L_IN_SC
10kΩ
16
RF_CVBS_OUT
VCR_L_OUT
TV_R_IN_SC
10kΩ
15
AUX_R_IN
VCR_L_OUT_SC
VCR_L_IN_SC
10kΩ
14
TV_Y/CVBS_OUT
V_AUD
VCR_R_IN_SC
10kΩ
13
AUX_L_IN
VCR_R_OUT
AUX_R_IN_SC
10kΩ
TV_R/C_OUT
VCR_R_OUT_SC
AUX_L_IN_SC
12
V_AUD
AUX_R_OUT
10kΩ
G_VID
AUX_L_OUT
11
AUD_BIAS
G_AUD
10
10µF
TV_G_OUT
MAX4399
ENC_R_IN_SC
AUX_SS
9
ENC_L_IN
V12
10kΩ
V_VID
+12V
8
G_DIG
V_AUD
ST_AUX_IN_SC
10kΩ
AUX_Y/CVBS_OUT
TV_R_OUT
ENC_L_IN_SC
7
INTERRUPT_OUT
TV_R_OUT_SC
10kΩ
VCR_Y/CVBS_OUT
TV_L_OUT
6
SCL
TV_L_OUT_SC
5
INTERRUPT_OUT
VCR_R/C_OUT
RF_MONO_OUT
SCL
SDA
RF_MONO_OUT_SC
4
G_VID
G_AUD
3
SDA
DEV_ADDR
PHONO_L_OUT_SC
2
DEV_ADDR
10µF
ALL CAPACITORS ARE 0.1µF AND ALL RESISTORS ARE 75Ω, UNLESS OTHERWISE NOTED.
30
______________________________________________________________________________________
50
49
VCR_R/C_OUT_SC
48
VCR_Y/CVBS_OUT_SC
47
46
AUX_Y/CVBS_OUT_SC
0.01µF
45
AUX_R/C_OUT_SC
44
TV_B_OUT_SC
43
TV_G_OUT_SC
42
41
TV_R/C_OUT_SC
40
TV_Y/CVBS_OUT_SC
39
38
RF_CVBS_OUT_SC
0.01µF
37
TV_FS_OUT_SC
36
35
1.8kΩ
22µH
22pF
Audio/Video Switch for Three SCART
Connectors
ENC_FS_IN
ENC_C_IN
ENC_Y_IN
ENC_B_IN
ENC_G_IN
ENC_R/C_IN
ENC_Y/CVBS_IN
V_VID
VCR_B_IN
VCR_G_IN
VCR_R/C_IN
VCR_FS_IN
VCR_Y/CVBS_IN
AUX_Y/CVBS_IN
AUX_R/C_IN
TV_Y/CVBS_IN
TV_R/C_IN
TOP VIEW
68
V_DIG
DEV_ADDR
SDA
SCL
INTERRUPT_OUT
G_DIG
ENC_L_IN
ST_AUX_IN
ENC_R_IN
AUD_BIAS
V_AUD
AUX_L_IN
AUX_R_IN
VCR_R_IN
VCR_L_IN
TV_R_IN
TV_L_IN
67 66 65 64
63 62 61 60 59 58
57 56 55 54 53 52
1
51
2
50
3
49
4
48
5
47
6
46
7
45
8
9
MAX4399
44
43
10
42
11
41
12
40
13
39
14
38
15
37
16
36
17
35
VID_BIAS
G_VID
VCR_R/C_OUT
VCR_Y/CVBS_OUT
AUX_Y/CVBS_OUT
V_VID
AUX_R/C_OUT
TV_B_OUT
TV_G_OUT
G_VID
TV_R/C_OUT
TV_Y/CVBS_OUT
RF_CVBS_OUT
V_VID
TV_FS_OUT
G_VID
TRAP
G_AUD
AUX_L_OUT
AUX_R_OUT
VCR_R_OUT
V_AUD
VCR_L_OUT
PHONO_R_OUT
PHONO_L_OUT
G_AUD
RF_MONO_OUT
TV_L_OUT
TV_R_OUT
V_AUD
V12
AUX_SS
TV_SS
VCR_SS
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
Chip Information
TRANSISTOR COUNT: 18,134
PROCESS: BiCMOS
______________________________________________________________________________________
31
MAX4399
Pin Configuration
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
68L QFN THIN.EPS
MAX4399
Audio/Video Switch for Three SCART
Connectors
PACKAGE OUTLINE
68L QFN THIN, 10x10x0.8 MM
21-0142
A
PACKAGE OUTLINE
68L QFN THIN, 10x10x0.8 MM
21-0142
32
A
______________________________________________________________________________________
Audio/Video Switch for Three SCART
Connectors
6LSOT.EPS
PACKAGE OUTLINE, SOT-23, 6L
21-0058
F
1
1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 33
© 2003 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX4399
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)