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August 1999 PRELIMINARY
ML6429 75W Quad Video Cable Drivers and Filters with Switchable Inputs
GENERAL DESCRIPTION
The ML6429 is a quad 4th-order Butterworth lowpass reconstruction filter plus quad video amplifier optimized for minimum overshoot and flat group delay. Each filter channel has a two-input multiplexer that switches between two groups of quad video signals. Applications driving SCART and EVC cables are supported for composite, component, and RGB video. 1VP-P input signals from DACs are AC coupled into the ML6429, where they are DC restored. Outputs are AC coupled, and drive 2VP-P into a 150W load. The ML6429 can be used with DC coupled outputs for certain applications. A fifth unfiltered channel is provided to support an additional analog composite video input. A swapping multiplexer between the two composite channels allows the distribution amplifiers to output from either input. Several ML6429s can be arranged in a master-slave configuration where an external sync can be used for CV and RGB outputs.
FEATURES
s
Cable drivers for Peritel (SCART), Enhanced Video Connector (EVC), and standard video connectors, 75W cable drivers for CV, S-video, and RGB 7.1MHz cutoffs CV, RGB, and S-video, NTSC or PAL filters with mux inputs and output channel mux 7.1MHz to 8.4MHz cutoffs achievable with peaking capacitor Quad 4th-order reconstruction or dual anti-aliasing filter 41dB stopband attenuation at 27MHz, 0.5dB flatness up to 4.5MHz 12ns group delay flatness up to 10MHz 0.4% differential gain, 0.4 differential phase on all channels, 0.4% total harmonic distortion on all channels 2kV ESD guaranteed Master-slave configuration allows up to 8 multiplexed, filtered output signals
s
s
s s
s s
s s
BLOCK DIAGRAM
17 2 CVINF/Y1* REQUIRED SYNC STRIP FILTERED CHANNEL 4th-ORDER FILTER VCCORGB
+ -
22 VCCOCV
6 VCC SWAP CVF
14
13 SWAP CVU
SYNCIN 23 SYNCOUT 24 3 4 7 8 9 10 11 12 CVINUA/Y2* CVINUB/Y3* RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2 MUX MUX MUX MUX
SYNC TIMER
TRANSCONDUCTANCE ERROR AMP
0.5V
SYNC TIMER SWAP MUX TRANSCONDUCTANCE ERROR AMP
+ -
x2
CVOUT1/YOUTA
21
x2
CVOUT2/YOUTB
20
0.5V 4th-ORDER FILTER 0.5V 4th-ORDER FILTER 0.5V 4th-ORDER FILTER 0.75V GNDO 19 GND 5 x2 x2 x2
ROUT/YOUTC
18
TRANSCONDUCTANCE ERROR AMP
+ -
GOUT/YOUTD
16
TRANSCONDUCTANCE ERROR AMP
+ -
BOUT/COUT
15
TRANSCONDUCTANCE ERROR AMP A/B MUX
+ -
1
*CAN ALSO INPUT SYNC ON GREEN SIGNALS
1
ML6429
PIN CONFIGURATION
ML6429 24-Pin SOIC (S24)
A/B MUX CVINF/Y1 CVINUA/Y2 CVINUB/Y3 GND VCC RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 SYNCOUT SYNCIN VCCOCV CVOUT1/YOUTA CVOUT2/YOUTB GNDO ROUT/YOUTC VCCORGB GOUT/YOUTD BOUT/COUT SWAP CVF SWAP CVU
TOP VIEW
PIN DESCRIPTION
PIN NAME FUNCTION PIN NAME FUNCTION
1
A/B MU X
Logic input pin to select between Bank or of the CV, RGB, or Y/C inputs. Internally pulled high. Filtered analog composite video or luma video input.
5 6 7 8 9 10 11 12 13
GND VCC RINA/Y4 RINB / Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2 SWAP CVU
Analog ground Analog 5V supply Filtered analog RED video or luma video input for Bank Filtered analog RED video or luma video input for Bank Filtered analog GREEN video or luma video input for Bank Filtered analog GREEN video or luma video input for Bank Filtered analog BLUE video or chroma video input for Bank Filtered analog BLUE video or chroma video input for Bank Logic input pin to select whether the outputs of CVOUT1/YOUTA and CVOUT2/YOUTB are from filtered or unfiltered CV sources. See Table 1. Internally pulled low. Logic input pin to select whether the outputs of CVOUT1/YOUTA and CVOUT2/YOUTB are from filtered or unfiltered CV sources. See Table 1. Internally pulled low.
2 3
CVINF/Y1
CVINUA/Y2 Unfiltered analog composite video or luma video input for Bank . A composite or luma or green signal must be present on CVINUA/Y2 or CVINUB/Y3 inputs to provide necessary sync signals to other channels (R,G,B,Y,C). Otherwise, sync must be provided at SYNCIN. For RGB applications, the green channel with sync can be used as an input to this pin. (see RGB Applications section) CVINUB/Y3 Unfiltered analog composite video or luma video input input for Bank . A composite or luma or green signal must be present on CVINUA/Y2 or CVINUB/Y3 inputs to provide necessary sync signals to other channels (R,G,B,Y,C). Otherwise, sync must be provided at SYNCIN. For RGB applications, the green channel with sync can be used as an input to this pin. (see RGB Applications section)
4
14
SWAP CVF
2
ML6429
PIN DESCRIPTION
PIN NAME FUNCTION PIN NAME FUNCTION
15 16
BOUT/COUT Analog BLUE video output or chroma output from either BINA/C1 or BINB/C2 GOUT/YOUTD Analog GREEN video output or luma output from either GINA/Y6 or GINB/ Y7 VCCORGB 5V power supply for output buffers of the RGB drivers
21 22 23
CVOUT1/YOUTA Composite video output for channel 1 or luma output. VCCOCV SYNCIN 5V power supply for output buffers of the CV drivers. Input for an external H-sync logic signal for CVU and RGB channels. TTL or CMOS. For normal operation, SYNCOUT is connected to SYNCIN. Logic output for H-sync detect for CVINUA/Y2 or CVINUB/Y3. TTL or CMOS. For normal operation, SYNCOUT is connected to SYNCIN.
17 18 19 20
ROUT/YOUTC Analog RED video output or luma output from either RINA/Y4 or RINB/Y5 GNDO Ground for output buffers
24
SYNCOUT
CVOUT2/YOUTB Composite video output for channel 2 or luma output.
3
ML6429
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. VCC .................................................................................................. 6V Junction Temperature ............................................. 150C ESD ..................................................................... >2000V Storage Temperature Range...................... -65C to 150C Lead Temperature (Soldering, 10 sec) ..................... 260C Thermal Resistance (qJA) ...................................... 80C/W
OPERATING CONDITIONS
Temperature Range ........................................ 0C to 70C VCC Range ................................................... 4.5V to 5.5V
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, VCC = 5V 10%, TA = Operating Temperature Range (Note 1)
SYMBOL ICC AV VSYNC PARAMETER Supply Current Low Frequency Gain (All Channels) Channel Sync Output Level CV/Y, R/Y, G/Y B/C Unfiltered t CLAMP f 0.5dB fC 0.8fC fSB Clamp Response Time 0.5dB Bandwidth (Flatness. All Filtered Channels) -3dB Bandwidth (Flatness. All Filtered Channels) 0.8 x fC Attenuation, All Filtered Channels Stopband Rejection CONDITIONS No Load (VCC = 5V) VIN = 100mVP-P at 300kHz Sync Present and Clamp Settled Sync Present and Clamp Settled Sync Present and Clamp Settled Settled to Within 10mV, CIN=0.1F
All Outputs All Outputs (with no Peaking Cap.
MIN
TYP 90
MAX
UNITS mA
5.34 0.6 1.2 0.7
6.0 0.9 1.4 1.0 10 4.5
6.65 1.1 1.5 1.2
dB V V V ms MHz MHz dB dB
6.7
7.1 1.5
See Figures 1 and 12)
All Outputs
All Filtered Channels fIN = 27MHz to 100MHz worst case (See Figures 2 and 13)
-35
-41
Vi NOISE OS ISC CL dG dF THD XTALK
Input Signal Dynamic Range (All Channels) AC Coupled Output Noise (All Channels) Peak Overshoot (All Channels) Over a Frequency Band of 25Hz-50MHz 2VP-P Output Pulse
1.25
1.35 1 4.3 120 35 0.4 0.4 0.4 -55
VP-P mVRMS % mA pF % % dB
Output Short Circuit Current (All Channels) Note 2 Output Shunt Capacitance (All Channels) Differential Gain (All Channels) Differential Phase (All Channels) Output Distortion (All Channels) Crosstalk Load at the Output Pin All Outputs All Outputs VOUT = 1.8VP-P at 3.58/4.43MHz Input of .5VP-P at 3.58/4.43MHz on any channel to output of any other channel Input A/B MUX Crosstalk Swap Mux Crosstalk Input of 0.5VP-P at 3.58/4.43MHz Input of 0.5VP-P at 3.58/4.43MHz
-54 -52
dB dB
4
ML6429
ELECTRICAL CHARACTERISTICS
SYMBOL PSRR t pd Dtpd PARAMETER PSRR (All Channels) Group Delay (All Channels) Group Delay Deviation from Flatness (See Figures 3 and 14) (All Channels) V IH VIL
Note 1: Note 2:
(Continued)
CONDITIONS 0.5VP-P (100kHz) at VCC at 100kHz to 3.58MHz (NTSC) to 4.43MHz (PAL) to 10MHz A/B MUX, SWAP CVU, SWAP CVF A/B MUX, SWAP CVU, SWAP CVF 2.5 1 MIN TYP -39 60 4 7 12 MAX UNITS dB ns ns ns ns V V
Input Voltage Logic High Input Voltage Logic Low
Sustained short circuit protection limited to 10 seconds.
Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions.
5
ML6429
FUNCTIONAL DESCRIPTION
The ML6429 is a quad monolithic continuous time analog video filter designed for reconstructing signals from four video D/A sources. The ML6429 is intended for use in AC coupled input and output applications. The filters approximate a 4th-order Butterworth characteristic with an optimization toward low overshoot and flat group delay. All outputs are capable of driving 2VP-P into AC coupled 150W video loads, with up to 35pF of load capacitance at the output pin. Likewise, they are capable of driving a 75W load at 1VP-P. All channels are clamped during sync to establish the appropriate output voltage swing range. Thus the input coupling capacitors do not behave according to the conventional RC time constant. Clamping for all channels settles within 10ms of a change in video sources. Input coupling capacitors of 0.1F are reccommended for all channels. During sync, a feedback error amplifier sources/sinks current to restore the DC level. The net result is that the average input current is zero. Any change in the input coupling capacitors value will linearly affect the clamp response times. The RGB channels have no pulldown current sources and are essentially tilt-free. The CV channel's inputs sink less than 1A during active video, resulting in a tilt of less than 1mV for a 220 F. Up to 1000F recommended to reude tilt for TV applications. SWAP MULTIPLEXER CONTROL Output pins CVOUT1/YOUTA and CVOUT2/YOUTB are each independently selectable between three input sources (CVINF, and CVINUA, CVINUB) depending on the digital inputs SWAP CVF, SWAP CVU, and A/B MUX. This allows the two outputs to remain independent and pass straight through, to remain independent but swapped, or for both outputs to have the same signal sourcing from either CVINF or CVINFA, CVINUB (See Table 1). If SWAP CVF is forced to logic low, then CVOUT2/YOUTB sources from CVINUA/ Y2, CVINUB/Y3. If SWAP CVU is logic low, CVOUT1/ YOUTA outputs video from the CVINUA, CVINUB input. If SWAP CVF is logic high, CVOUT2/YOUTB outputs from CVINF/Y1 input. If SWAP CVU is high, CVOUT1/YOUTA outputs from CVINUA/Y2 or CVINUB/Y3. Both SWAP CVF and SWAP CVU will pull low if they are not driven. The ML6429 is robust and stable under all stated load and input conditions. Bypassing both VCC pins directly to ground ensures this performance. Two ML6429's can be connected in a master-slave sync configuration. When using this configuration, only the "master" ML6429 is required to have a signal with embedded sync present on the CVINUA, CVINUB input. In the absence of sync on the CVINUA or CVINUB input of the "slave" ML6429, the "slave" IC will have its SYNC IN input connected to the SYNC OUT output of the "master" ML6429. SYNCIN AND SYNCOUT PINS Each ML6429 has two sync detectors which control the DC restore functions. The filtered channel has its own detector, which controls the DC restore function during the horizontal sync period of the CVINF/Y1 input. The other sync detector controls the DC restore functions for the filtered channels based upon the composite or luma input at the CVINUA/Y2 or CVINUB/Y3 pins. Required Setup: A composite or luma or green signal must be present on CVINUA/Y2 or CVINUB/Y3 inputs to provide necessary sync signals to other channels (R,G,B,Y,C). Otherwise, sync must be provided at the SYNCIN pin. For RGB applications, the green channel with sync can be used as an input to CVINUA/Y2 or CVINUB/Y3. The SYNCOUT pin outputs a logic high when it detects the horizontal sync of either the CVINUA/Y2 or CVINUB/Y3 input (note that one input is selected by the A/B MUX pin). The SYNCIN pin is an input for an external H-sync logic signal to enable or disable the internal DC restore loop for the filtered channels. When SYNCIN is logic high, the DC restore function is enabled. For normal operation, the SYNCOUT pin is connected to the SYNCIN pin (see Figure 4). If the CVINUdoes not have an embedded sync, an external sync can be applied on the SYNCIN pin. In master-slave configurations, the SYNCOUT of a ML6429 master can be used as the SYNCIN of a ML6429 slave. VIDEO I/O DESCRIPTION Each input is driven by either a low impedance source or the output of a 75W terminated line. The input is required to be AC coupled via a 0.1F coupling capacitor which gives a nominal clamping time of 10ms. All outputs are capable of driving an AC coupled 150W load at 2VP-P or 1VP-P into a 75W load. At the output pin, up to 35pF of load capacitance can be driven without stability or slew issues. A 220F AC coupling capacitor is recommended at the output to reduce power consumption. ANALOG MULTIPLEXER CONTROL The four filter channels each have two input multiplexers which are paired to select between two four-channel video sources (i.e., composite video plus RGB component video). If A/B MUX is forced to logic high, it will select Bank of video inputs (CVINUA/Y2, RINA/Y4, GINA/Y6, BINA/C1) to be enabled. If A/B MUX is logic low, then Bank of video inputs (CVINUB/Y3, RINB/Y5,GINB/Y7, BINB/C2) will be selected. If the A/B MUX is open, it will pull to logic high.
6
ML6429
1 20
0
0
AMPLITUDE (dB)
-1
AMPLITUDE (dB)
0 0.1 1 10
-20
-2
-40
-3
-60
-4
-80 0.01
0.1
1 FREQUENCY (MHz)
10
100
FREQUENCY (MHz)
Figure 1. Passband Flatness (Normalized) All outputs. Passband is ripple-free.
90
Figure 2. Passband/Stopband Rejection Ratios (Normalized) All outputs.
70
DELAY (ns)
50
30
10
1
2
3
4
5
6
7
8
9
10
11
FREQUENCY (MHz)
Figure 3. Group Delay, all Outputs Low frequency group delay is 62ns. At 3.58MHz group delay increases by only 4ns. At 4.43MHz group delay increases by only 7ns. The maximum deviation from flat group delay of 12ns occurs at 6MHz. INPUTS SWAP CVF 0 0 1 1 0 0 1 1 OUTPUTS ROUT/YOUTC RINB/Y5 RINB/Y5 RINB/Y5 RINB/Y5 RINA/Y4 RINA/Y4 RINA/Y4 RINA/Y4
A/B MUX 0 0 0 0 1 1 1 1
SWAP CVU CVOUT1/YOUTA CVOUT2/YOUTB 0 1 0 1 0 1 0 1 CVINF/Y1 CVINF/Y1 CVINUB/Y3 CVINUB/Y3 CVINF/Y1 CVINF/Y1 CVINUA/Y2 CVINUA/Y2 CVINUB/Y3 CVINF/Y1 CVINUB/Y3 CVINF/Y1 CVINUA/Y2 CVINF/Y1 CVINUA/Y2 CVINF/Y1
GOUT/YOUTD GINB/Y7 GINB/Y7 GINB/Y7 GINB/Y7 GINA/Y6 GINA/Y6 GINA/Y6 GINA/Y6
BOUT/COUT BINB/C2 BINB/C2 BINB/C2 BINB/C2 BINA/C1 BINA/C1 BINA/C1 BINA/C1
Table 1. Selecting Composite, Luma, RGB, and Chroma Outputs
7
ML6429
TYPICAL APPLICATIONS
BASIC APPLICATIONS The ML6429 provides channels for two banks of inputs for RGB and composite video. The R and G channels can be used as luma inputs while the B channel can be used as a chroma input. Composite outputs and an H-sync output is also provided. There are several configurations available with the ML6429. Figure 4 includes a list of basic output options for composite, S-video, TV modulator, and RGB outputs. Note that each composite channel can drive a CV load or a channel modulator simultaneously. The ML6429 standalone can be used as an EVC or SCART cable driver with nine video sources (75W or low impedance buffer) and seven video outputs. All inputs and outputs are AC coupled. When driving seven loads, power dissipation must be measured to ensure that the junction temperature doesn't exceed 120C. EVC CABLE DRIVING The ML6429 can be configured to drive composite video, S-video, and horizontal sync through an EVC connector (Figure 5). Composite video and S-video inputs are filtered through 4th-order Butterworth filters and driven through internal 75W cable drivers. A buffered H-sync output is also available. SCART CABLE DRIVING The ML6429 can be configured either as a SCART cable driver (Figure 4) or as a SCART cable driver and S-video driver (Figure 6). A horizontal sync output is also available. Note that the ML6429 can be used in a master-slave mode where the sync-out from the master is used as the sync-in of the slave; this allows the CV, S-video, and RGB channels to operate under the same sync signals. Note that in SCART applications, it is not always necessary to AC couple the outputs. Systems using SCART connectors for RGB and composite video can typically handle between 0 and 2V DC offset (see DC Coupled Applications section). RGB APPLICATIONS RGB video can be filtered and driven through the ML6429. For sync suppressed RGB, the sync signal can be derived from SYNCIN PIN. OSD (ON-SCREEN DISPLAY) APPLICATIONS Unfiltered RGB video from an OSD processor needs to be filtered and then synchronized to a fast blanking interval or alpha-key signal for later video processing. With the total filter delay being 80ns 10ns, a D flip-flop or similar delay element can be used to delay the fast blanking interval or alpha-key signal, which synchronizes the RGB and OSD signals (Figure 9). CHANNEL MULTIPLEXING The ML6429 can be configured for multiple composite channel multiplexing (Figure 8). Composite and RGB sources such as VCRs, and digital MPEG 2 sources can be selected using the ML6429 swap mux controls. A/B MUX, SWAP CVU, and SWAP CVF signals can be used to select and route from various input sources. DC COUPLED APPLICATIONS The 220F capacitor coupled with the 150W termination forms a highpass filter which blocks the DC while passing the video frequencies and avoiding tilt. Lower values such as 10F would create a problem. By AC coupling, the average DC level is zero. Thus, the output voltages of all channels will be centered around zero. Alternately, DC coupling the output of the ML6429 is allowable. There are several tradeoffs: The average DC level on the outputs will be 2V; Each output will dissipate an additional 40mW nominally; The application will need to accommodate a 1V DC offset sync tip; And it is recommended to limit one 75W load per output. However, if two loads are required to be driven at a time on the composite output while DC coupling is used, then the swap-mux and 5th line driver can be configured to enable the filtered composite signal on both the 4th and 5th line drivers. Thus, the composite load driving requirement is divided into two line drivers versus one. Required Setup: A composite or luma or green signal must be present on CVINUA/Y2 or CVINUB/Y3 inputs to provide necessary sync signals to other channels (R,G,B,Y,C). Otherwise, sync must be provided at the SYNCIN pin. For RGB applications, the green channel with sync can be used as an input to CVINUA/Y2 or CVINUB/Y3. USING THE ML6429 FOR PAL APPLICATIONS The ML6429 can be optimized for PAL video by adding frequency peaking to the composite and S-video outputs. Figure 10 illustrates the use of a additional external capacitor (300pF), added in parallel to the output source termination resistor. This raises the frequency response from 1.0dB down at 4.8MHz (for no peaking cap) to 0.2dB down at 4.8MHz (for 300 pF), which allows for accurate reproduction of the upper sideband of the PAL subcarrier. Figure 11 shows the frequency response of PAL video with various values of peaking capacitors (0pF, 220pF, 270pF, 300pF) between 0 and 10MHz. For NTSC applications without the peaking capacitor, the rejection at 27MHz is 40dB (typical). For PAL applications with the peaking capacitor, the rejection at 27MHz is 34dB (typical). (Figure 12). The differential group delay is shown in Figure 13 with and without a peaking capacitor (0pF, 220pF, 270pF, and 300pF) varies slightly with capacitance; from 8ns to 13ns.
8
ML6429
2 3 4 7 8 9 10 11 12
19 GNDO CVINF/Y1 CVINUA/Y2 CVINUB/Y3 RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2 SYNCIN 23
5 GND
17 VCCORGB
22 VCCOCV
6 VCC CVOUT1/YOUTA 21
220F
75
VIDEO CABLES CV/Y MODULATOR
220F CVOUT2/YOUTB ML6429 ROUT/YOUTC GOUT/YOUTD BOUT/COUT SYNCOUT 24 A/B MUX 1 SWAP CVU SWAP CVF 13 14 220F 18 220F 16 220F 15
75 CV/Y
20 75
MODULATOR R/Y 75 G/Y 75 B/C OPTIONAL FOR DC COUPLED APPLICATIONS H SYNC OUT
INPUTS
Bank A: Bank B: Other: RGB, CV filtered path RGB, CV filtered path CV unfiltered path, Sync IN (slave mode)
OUTPUTS
Option 1: 2 CV outputs + 2 TV modulator outputs, 1 RGB output Option 2: 2 CV outputs + 1 TV modulator output, 1 S-video output Other: Sync output (buffered stripped sync)
Figure 4. Basic Application for NTSC
2 COMPOSITE VIDEO IN 3 4 LUMA IN 7 8 9 10 CHROMA IN 11 12
19 GNDO CVINF/Y1 CVINUA/Y2 CVINUB/Y3 RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2 SYNCIN 23
5 GND
17 VCCORGB
22 VCCOCV
6 VCC CVOUT1/YOUTA 21
COMPOSITE VIDEO OUT CVOUT2/YOUTB ML6429 ROUT/YOUTC GOUT/YOUTD BOUT/COUT SYNCOUT 24 A/B MUX 1 SWAP CVU SWAP CVF 13 14 H SYNC OUT 18 LUMA OUT S-VIDEO OUT CHROMA OUT TO EVC CONNECTOR
20
16 15
Figure 5. EVC (Enhanced Video Connector) Application: S-Video, Composite, plus H-Sync out
9
ML6429
19 GNDO CVINF/Y1 CVINUA/Y2 CVINUB/Y3 RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2
5 GND
17 VCCORGB
22 VCCOCV
6 VCC CVOUT1/YOUTA
2 COMPOSITE VIDEO IN 3 4 LUMA IN 7 8 9 10 CHROMA IN 11 12
21
COMPOSITE VIDEO OUT CVOUT2/YOUTB ML6429
20
ROUT/YOUTC GOUT/YOUTD BOUT/COUT
18
LUMA OUT S-VIDEO OUT CHROMA OUT
16 15
SYNCIN 23
SYNCOUT 24
A/B MUX 1
SWAP CVU SWAP CVF 13 14 H SYNC OUT TO SCART CONNECTOR
24 SYNC OUT CVINF/Y1 CVINUA/Y2 CVINUB/Y3 RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2
23 SYNC IN
17 VCCORGB
22 VCCOCV
6 VCC CVOUT1/YOUTA
2 3 4 R INPUT 7 8 RGB INPUT G INPUT 9 10 B INPUT 11 12
21
CVOUT2/YOUTB ML6429SLAVE
20
ROUT/YOUTC GOUT/YOUTD BOUT/COUT
18
R OUTPUT G OUTPUT B OUTPUT RGB VIDEO OUT
16 15
GNDO 19
GND 5
A/B MUX 1
SWAP CVU SWAP CVF 13 14
Figure 6. SCART (Peritel) + S-Video Application: S-Video, RGB, Composite, plus H-Sync out
10
ML6429
VCR 1k VIDEO RECORDER
CV R G
MODULATOR B G R DIGITAL PLAYER OR MPEG-2 DECODER 1k
B
0.1F 19 GNDO CV1 2 COMPOSITE VIDEO IN 0.1F 0.1F Y 0.1F 0.1F U 0.1F 9 0.1F V 0.1F 0.1F B R 10 11 12 G CV2 3 CV3 4 7 8 CVINF/Y1 CVINUA/Y2 CVINUB/Y3 RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2 ROUT/YOUTC GOUT/YOUTD BOUT/COUT 18 ROUT MODULATOR GOUT TV BOUT TV ML6429 220F CVOUT2/YOUTB 5 GND 17 VCCORGB 22 VCCOCV 6 VCC CVOUT1/YOUTA
220F 21
CVOUT1
20
COMPOSITE VIDEO OUT, CVOUT2
16 15
SYNCIN 23
SYNCOUT 24
A/B MUX 1
SWAP CVU SWAP CVF 13 14
A/B MUX 0 1
INPUTS SWAP CVU 0 0
SWAP CVF 0 1
CVOUT1 Digital Player Digital Player
OUTPUTS CVOUT2 VCR Digital Player
ROUT VCR Digital Player
GOUT VCR Digital Player
BOUT VCR Digital Player
Figure 7. Multi-Source CV and RGB Channels
11
ML6429
UNFILTERED R OSD (ON-SCREEN DISPLAY) PROCESSOR G B
80ns10ns DELAY
FILTERED ROUTPUT GOUTPUT BOUTPUT
ML6429 SCART/QUAD VIDEO FILTER AND DRIVER
TO MUX OR OTHER PROCESSING
FAST BLANKING INTERVAL OR ALPHA-KEY SIGNAL ML6431 GENLOCK/CLOCK GENERATOR 13.5MHz/ 27MHz
D Q Standard 74XX D'FF
FAST BLANKING INTERVAL OR ALPHA-KEY SIGNAL
DELAY AT 13.5MHz IS APPROXIMATELY 74ns
Figure 8. Synchronizing the Filter Delay with Fast Blanking or Alpha-Key Signals in OSD Applications
2 3 4 7 8 9 10 11 12
19 GNDO CVINF/Y1 CVINUA/Y2 CVINFB/Y3 RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2 SYNCIN 23
5 GND
17 VCCORGB
22 VCCOCV
6 VCC CVOUT1/YOUTA 21
220F
75
VIDEO CABLES CV/Y
330pF
MODULATOR
220F CVOUT2/YOUTB ML6429 ROUT/YOUTC GOUT/YOUTD BOUT/COUT SYNCOUT 24 A/B MUX 1 SWAP CVF SWAP CVU 13 14 220F 18 220F 16 220F 15
75 CV/Y
20
330pF 75
MODULATOR R/Y
75 G/Y 75 B/C
NOT REQUIRED FOR DC COUPLED APPLICATIONS H SYNC OUT
INPUTS
Bank A: Bank B: Other: RGB, CV filtered path RGB, CV filtered path CV unfiltered path, Sync IN (slave mode)
OUTPUTS
Option 1: 2 CV outputs + 2 TV modulator outputs, 1 RGB output Option 2: 2 CV outputs + 1 TV modulator output, 1 S-video output Other: Sync output (buffered stripped sync)
Figure 9. Basic Application for PAL
12
ML6429
-0.5 0 0.5
1dB WITHOUT PEAKING
0
1
2
3
4
5
6
7
8
9
10
0.2dB WITH PEAKING
AMPLITUDE (dB)
1 1.5 2 2.5 3 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (MHz)
300pF 270pF 220pF 0pF
Figure 10. NTSC/PAL Video Frequency Response With and Without Peaking Capacitor
0
-10 AMPLITUDE (dB)
NTSC/PAL -34dB WITH PEAKING
-20
-30
300pF NTSC/PAL -40dB WITHOUT PEAKING
-40
270pF 220pF 0pF
-50
0
3
6
9
12
15
18
21
24
27
30
FREQUENCY (MHz)
Figure 11. Stopband Rejection at 27MHz With and Without Peaking Capacitor
10
8ns GROUP DELAY WITHOUT PEAKING
0
DELAY (ns)
13ns GROUP DELAY WITH 330pF PEAKING
-10
300pF 270pF 220pF 0pF
-20
0
1
2
3
4
5
6
7
8
9
10
FREQUENCY (MHz)
Figure 12. Group Delay at 5.5MHz (PAL) With and Without Peaking Capacitor
13
ML6429
LEGEND
5V GND C12 1F FB1 VCCA FB2 C10 1F 220F R24 75 CVOUT1 MOVABLE JUMPER 1 JPx PERMANENT SHORT 3
2
C13
0.1F VCCO
C11
0.1F
CVIN1
C14 R1 75 C15 R2 75 C16 R3 75 C17
0.1F
6
17
22
19
5 X2 21 C2 220F R23 75 C33 330pF CVOUT2 YOUT1
U2
0.1F 2 FOURTH ORDER FILTER MUX FOURTH ORDER FILTER FOURTH ORDER FILTER FOURTH ORDER FILTER 14 13 MUX X2
CVIN2
20 C3 220F
YIN1
0.1F 0.1F 0.1F
3 4 7 8
R22 75 C34 330pF
CVOUT2 YOUT1
YIN2 C18 R4 75
MUX
X2
18 C4 16 220F R21 75 YOUT2
9 10
P2--EVC 13 14 15
MUX
X2
CIN1
C19
0.1F
11 12
MUX
X2 24 23
15
C5
220F
R20 75
COUT1
5 4
C20 JP5 32 1 JP2 1 23 R5 75
0.1F SW1-C
1
SW1-A SW1-B 5V
5 9 13
R6 1k JP1 1 GND 2 3 1 14 13 24 23 1 JP4 21 C6 220F 1 2 3 JP3 2 3
17 21 19 16 7 11 15
HSYNCIN
U2
C21 R7 1k 1 R8 1k JP6 2 BIN R10 1k C25 GIN R11 75 C26 0.1F 0.1F 3 R9 1k C23 C24 0.1F 0.1F 7 8 MUX FOURTH ORDER FILTER FOURTH ORDER FILTER FOURTH ORDER FILTER 17 1F 0.1F C31 C32 VCCO X2 C22 0.1F 3 4 0.1F 2 FOURTH ORDER FILTER MUX X2 MUX X2
20
R17 75
CVOUT+ Y+
P1--SCART
18
C7
220F
R16 75
BOUT
9 10
MUX
X2
16
C8
220F
R15 75
GOUT
11 12
MUX 6
X2 22 0.1F 0.1F 19 5
15
C9
220F
R14 75
ROUT
RIN R12 75 CIN2
C27
0.1F C29 C30 VCCA
C28 R13 75
0.1F
Figure 13. Schematic
14
ML6429
PHYSICAL DIMENSIONS inches (millimeters)
Package: S24 24-Pin SOIC
0.600 - 0.614 (15.24 - 15.60)
24
0.291 - 0.301 0.398 - 0.412 (7.39 - 7.65) (10.11 - 10.47)
PIN 1 ID
1 0.024 - 0.034 (0.61 - 0.86) (4 PLACES)
0.050 BSC (1.27 BSC)
0.095 - 0.107 (2.41 - 2.72)
0 - 8
0.090 - 0.094 (2.28 - 2.39)
0.012 - 0.020 (0.30 - 0.51)
SEATING PLANE
0.005 - 0.013 (0.13 - 0.33)
0.022 - 0.042 (0.56 - 1.07)
0.009 - 0.013 (0.22 - 0.33)
ORDERING INFORMATION
PART NUMBER
ML6429CS-1
TEMPERATURE RANGE
0C to 70C
PACKAGE
24 Pin SOIC (S24)
Micro Linear Corporation 2092 Concourse Drive San Jose, CA 95131 Tel: (408) 433-5200 Fax: (408) 432-0295 www.microlinear.com
(c) Micro Linear 1999. respective owners.
is a registered trademark of Micro Linear Corporation. All other trademarks are the property of their
Products described herein may be covered by one or more of the following U.S. patents: 4,897,611; 4,964,026; 5,027,116; 5,281,862; 5,283,483; 5,418,502; 5,508,570; 5,510,727; 5,523,940; 5,546,017; 5,559,470; 5,565,761; 5,592,128; 5,594,376; 5,652,479; 5,661,427; 5,663,874; 5,672,959; 5,689,167; 5,714,897; 5,717,798; 5,742,151; 5,747,977; 5,754,012; 5,757,174; 5,767,653; 5,777,514; 5,793,168; 5,798,635; 5,804,950; 5,808,455; 5,811,999; 5,818,207; 5,818,669; 5,825,165; 5,825,223; 5,838,723; 5.844,378; 5,844,941. Japan: 2,598,946; 2,619,299; 2,704,176; 2,821,714. Other patents are pending. Micro Linear makes no representations or warranties with respect to the accuracy, utility, or completeness of the contents of this publication and reserves the right to makes changes to specifications and product descriptions at any time without notice. No license, express or implied, by estoppel or otherwise, to any patents or other intellectual property rights is granted by this document. The circuits contained in this document are offered as possible applications only. Particular uses or applications may invalidate some of the specifications and/or product descriptions contained herein. The customer is urged to perform its own engineering review before deciding on a particular application. Micro Linear assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Micro Linear products including liability or warranties relating to merchantability, fitness for a particular purpose, or infringement of any intellectual property right. Micro Linear products are not designed for use in medical, life saving, or life sustaining applications.
15
DS6429-01

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