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August 1999 PRELIMINARY
ML6427 75W Quad Video Cable Drivers and Filters with Switchable Inputs
GENERAL DESCRIPTION
The ML6427 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 ML6427 where they are DC restored. Outputs are AC coupled and drive 2VP-P into a 150W load. The ML6427 can provide 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 ML6427s 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 CV, RGB, and S-video, NTSC or PAL filters with mux inputs and output channel mux Quad reconstruction filter or dual anti-aliasing filter 43dB stopband attenuation at 27MHz 1dB flatness up to 4.8MHz 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 Master-slave configuration allows up to 8 multiplexed, filtered output signals
s
s s s s s
s s
BLOCK DIAGRAM
SYNCIN 2 SYNC TIMER 17 VCCORGB UNFILTERED CHANNEL 22 VCCOCV 6 VCC 14 SWAP CVU 13 SWAP CVF
SYNCIN 23 SYNCOUT 24 3 4 CVINFA/Y2* CVINFB/Y3* RINA/Y4 RINB/Y5 MUX MUX
TRANSCONDUCTANCE ERROR AMP
+ -
0.5V x2 SWAP MUX
SYNC TIMER REQUIRED SYNC STRIP TRANSCONDUCTANCE ERROR AMP
+ -
CVOUT1/YOUTA 21
4th-ORDER FILTER
x2
CVOUT/YOUTB 20
7 8
0.5V 4th-ORDER FILTER x2
TRANSCONDUCTANCE ERROR AMP
ROUT/YOUTC 18
+ -
9
GINA/Y6 MUX TRANSCONDUCTANCE ERROR AMP
0.5V 4th-ORDER FILTER x2 GOUT/YOUTD 16
GINB/Y2 10 BINA/C1 11 BINB/C2 12 A/B MUX 1
+ -
0.5V 4th-ORDER FILTER x2 BOUT/COUT 15
MUX
TRANSCONDUCTANCE ERROR AMP
+ -
0.75V GNDO 19 GND 5
*CAN ALSO INPUT SYNC ON GREEN SIGNALS
1
ML6427
PIN CONFIGURATION
ML6427 24-Pin SOIC (S24)
A/B MUX CVINU/Y1 CVINFA/Y2 CVINFB/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 CVU SWAP CVF
TOP VIEW
2
ML6427
PIN DESCRIPTION
PIN NAME FUNCTION PIN NAME FUNCTION
1
A/B MUX
Logic input pin to select between Bank or of the CV, RGB, or Y/C inputs. Internally pulled high. Unfiltered analog composite video or luma video input. Internally pulled high. A composite or luma or green signal must be present on either the CVINFA/Y2 or the CVINFB/ Y3 input 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). Filtered analog composite video or luma video input for Bank . Note that SYNC is stripped from this signal for the other channels. A composite or luma or green signal must be present on either the CVINFA/Y2 or the CVINFB/Y3 input 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). Filtered analog composite video or luma video input for Bank . Note that SYNC is stripped from this signal for the other channels. 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
12 BINB/C2 13 SWAP CVF
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. Analog BLUE video output or chroma output from either BINA/C1 or BINB/C2 Analog GREEN video output or luma output from either GINA/Y6 or GINB/Y7 5V power supply for output buffers of the RGB drivers Analog RED video output or luma output from either RINA/Y4 or RINB/ Y5 Ground for output buffers
2
CVINU/Y1
14 SWAP CVU
15 BOUT/COUT
3
CVINFA/Y2
16 GOUT/YOUTD
17 VCCORGB 18 ROUT/YOUTC
19 GNDO
4
CVINFB/Y3
20 CVOUT2/YOUTB Composite video output for channel 2 or luma output. 21 CVOUT1/YOUTA Composite video output for channel 1 or luma output. 22 VCCOCV 23 SYNCIN 5V power supply for output buffers of the CV drivers. Input for an external H-sync logic signal for filtered channels. TTL or CMOS. For normal operation SYNCOUT is connected to SYNCIN. Logic output for H-sync detect for CVINFA/Y2 or CVINFB/Y3. TTL or CMOS. For normal operation SYNCOUT is connected to SYNCIN.
5 6 7 8 9
GND VCC RINA/Y4 RINB / Y5 GINA/Y6
24 SYNCOUT
10 GINB/Y7 11 BINA/C1
3
ML6427
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 VDD 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) CONDITIONS No Load (VCC = 5V) VIN = 100mVP-P at 300kHz 5.34 0.6 1.2 0.7 MIN TYP 90 6.0 0.9 1.4 1.0 10 4.5 6.7 7.1 1.5 -35 -41 6.65 1.1 1.5 1.2 MAX UNITS mA dB V V V ms MHz MHz dB dB
Channel Sync Output Level CV/Y, R/Y, G/Y Sync Present and Clamp Settled B/C Unfiltered 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. See Figures 2 and 13) All Outputs All Filtered Channels fIN = 27MHz to 100MHz worst case (See Figures 2 and 13)
tCLAMP f0.5dB 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
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
1.25 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 Load 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 0.5VP-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
ML6427
ELECTRICAL CHARACTERISTICS (Continued)
SYMBOL PSRR tpd Dtpd PARAMETER PSRR (All Channels) Group Delay (All Channels) Group Delay Deviation from Flatness CONDITIONS 0.5VP-P (100kHz) at VCC at 100kHz to 3.58MHz (NTSC) to 4.43MHz (PAL) (All Channels) VIH VIL
Note 1: Note 2:
MIN
TYP -39 60 4 7 12
MAX
UNITS dB ns ns ns ns V
to 10MHz A/B MUX, SWAP CVU, SWAP CVF A/B MUX, SWAP CVU, SWAP CVF 2.5
Input Voltage Logic High Input Voltage Logic Low
1
V
Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions. Sustained short circuit protection limited to 10 seconds.
5
ML6427
FUNCTIONAL DESCRIPTION
The ML6427 is a quad monolithic continuous time analog video filter designed for reconstructing signals from four video D/A sources. The ML6427 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. They are also capable of driving a 75W load at 1VP-P. All channels are clamped during sync to establish the appropriate output voltage swing range. Consequently 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 recommended 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 value of the input coupling capacitors will linearly affect the clamp response times. The RGB channels have no pulldown current sources and are essentially tilt-free. The inputs of the CV channels sink less than 1A during active video, resulting in a tilt of less than 1mV for 220F output capacitors. A 1000F capacitor is recommended for TV applications to minimize tilt in the CV channels. SWAP MULTIPLEXER CONTROL Output pins CVOUT1/YOUTA and CVOUT2/YOUTB are each independently selectable among three input sources (CVINU/Y1, CVINFA/Y2, or CVINFB/Y3) depending on the state of digital inputs SWAP CVF, SWAP CVU, and A/B MUX. This allows the two outputs to remain independent and pass straight through, or to remain independent but swapped, or for both outputs to have the same signal sourcing from either CVINU/Y1, CVINFA/Y2, or CVINFB/Y3 (See Table 1). If SWAP CVF is forced to logic low then CVOUT2/YOUTB is sourced from either the CVINFA/Y2 OR THE CVINFB/Y3 input. If SWAP CVU is logic low then CVOUT1/YOUTA provides video from either the CVINFA/Y2 OR THE CVINFB/Y3 input. If SWAP CVF is logic high then CVOUT2/YOUTB provides video from the CVINU/Y1 input. If SWAP CVU is high then CVOUT1/YOUTA provides video from either the CVINFA/Y2 or the CVINFB/Y3 input. Both SWAP CVF and SWAP CVU will pull low if they are not driven. The ML6427 is robust and stable under all stated load and input conditions. Bypassing both VCC pins directly to ground ensures this performance. Two ML6427s can be connected in a master-slave sync configuration. When using this configuration (See Figure 6) only the "master" ML6427 is required to have a signal with embedded sync present on the CVINFA/Y2 and CVINFB/Y3 inputs. In the absence of sync on the CVINFA/Y2 and CVINFB/Y3 inputs of the "slave" ML6427 it will have its SYNCIN input connected to the SYNCOUT output of the "master" ML6427. SYNCIN AND SYNCOUT PINS Each ML6427 has two sync detectors which control the DC restore functions. The unfiltered channel has its own detector, which controls the DC restore function during the horizontal sync period of the CVINU/Y1 input. The other sync detector controls the DC restore functions for the filtered channels based upon the composite or luma silgnal at the CVINFA/Y2 or CVINFB/Y3 input. Required Setup: A composite or luma or green signal must be present on CVINFA/Y2 or CVINFB/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 CVINFA/Y2 or CVINFB/Y3. The SYNCOUT pin provides a logic high when it detects the horizontal sync of either the CVINFA/Y2 or CVINFB/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 neither the CVINFA/Y2 nor the CVINFB/Y3 has an embedded sync an external sync can be applied on the SYNCIN pin. In master-slave configurations the SYNCOUT of a ML6427 master can be used as the SYNCIN of a ML6427 slave (see Figure 6). 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. For DC coupled outputs see the Typical Applications section. 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 the video inputs (CVINFA/Y2, RINA/Y4, GINA/ Y6, BINA/C1) to be enabled. If A/B MUX is logic low then Bank of video inputs (CVINFB/Y3, RINB/Y5,GINB/Y7, BINFB/C2) will be selected. If the A/B MUX is open it will pull to logic high.
6
ML6427
1 20
0 AMPLITUDE (dB) AMPLITUDE (dB) 0 0.1 1 10
0
-1
-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 CVU 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 CVF 0 1 0 1 0 1 0 1
CVOUT1/YOUTA CVOUT2/YOUTB CVINU/Y1 CVINU/Y1 CVINFB/Y3 CVINFB/Y3 CVINU/Y1 CVINU/Y1 CVINFA/Y2 CVINFA/Y2 CVINFB/Y3 CVINU/Y1 CVINFB/Y3 CVINU/Y1 CVINFA/Y2 CVINU/Y1 CVINFA/Y2 CVINU/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
ML6427
TYPICAL APPLICATIONS
BASIC APPLICATIONS The ML6427 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 are also provided. There are several configurations available with the ML6427. 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 and a channel modulator simultaneously. The ML6427 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 the power dissipation must be calculated to ensure that the junction temperature doesn't exceed 120C. EVC CABLE DRIVING CHANNEL MULTIPLEXING The ML6427 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 DC COUPLED APPLICATIONS The ML6427 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 ML6427 can be used in a master-slave mode where the SYNCOUT signal from the master is used as the SYNCIN signal 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 2VDC offset (see DC Coupled Applications section). RGB APPLICATIONS RGB video can be filtered and driven through the ML6427 in one of two ways: 1. For sync suppressed RGB the sync signal can be derived from the composite or luma signal on the inputs of CVINFA/Y2 or CVINFB/Y3. 2. For RGB with sync on the green signal the green channel must be fed into either the CVINFA/Y2 or CVINFB/ Y3 input. The sync will be extracted from green and used on red and bue channels. See also the SYNCIN and SYNCOUT Sections. A 220F capacitor coupled with a 150W termination resistor forms a highpass filter which blocks DC while passing the video frequencies and avoiding tilt. Lower value capacitors, such as 10F, would create a problem. By AC coupling the average DC level is zero. Consequently the output voltages of all channels will be centered around zero. Alternately, DC coupling the output of the ML6427 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 1VDC offset sync tip; and it is recommended to use only one 75W load per output. However, if it is necessary to drive two loads 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. This divides the composite load driving requirement into two line drivers versus one. Required Setup: A composite or luma or green signal must be present on the CVINFA/Y2 or the CVINFB/Y3 input to provide necessary sync signals to the 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 CVINFA/Y2 or CVINFB/Y3. The ML6427 can be configured for multiple composite channel multiplexing (Figure 8). Composite sources such as VCRs, video game consoles, and camcorders can be selected using the ML6427 swap mux controls. A/B MUX, SWAP CVU, and SWAP CVF signals can be used to select and route from various input sources. 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. This will synchronize the RGB and OSD signals (Figure 9). CCIR656 AND CCIR601 APPLICATIONS Composite or luma channels can be fed back into an alternate channel or into another ML6427 (master-slave configuration) so that approximately 80dB/decade attenuation outputs are provided. The ML6427 can be configured for composite and luma loopback (Figure 7). H-sync outputs are also provided.
8
ML6427
TYPICAL APPLICATIONS (Continued)
USING THE ML6427 FOR PAL APPLICATIONS The ML6427 can be optimized for PAL video by adding frequency peaking to the composite and S-video outputs. Figure 10 illustrates the use of an additional external capacitor (330pF) in parallel with the output source termination resistor. This raises the frequency response from 1.6dB at 4.8MHz to 0.35dB at 4.8MHz, 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 (220pF, 270pF, 330pF and none) between 0 and 10MHz. For NTSC applications without the peaking capacitor the rejection at 27MHz is 42dB (typical). For PAL applications with the peaking capacitor the rejection at 27MHz is 38dB (typical). See Figure 12. The differential group delay, shown in Figure 13 with and without a peaking capacitor (220pF, 270pF, and 330pF and none), varies slightly with capacitance from 8ns to 13ns.
2 3 4 7 8 9 10 11 12
19 GNDO CVINU/Y1 CVINFA/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 MODULATOR
220F CVOUT2/YOUTB ML6427 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 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
19 GNDO CVINU/Y1 CVINFA/Y2 CVINFB/Y3 RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2 SYNCIN 23 SYNCOUT 24 A/B MUX 1 ML6427 MASTER CVOUT2/YOUTB 20 LUMA OUT S-VIDEO OUT CHROMA OUT TO EVC CONNECTOR 5 GND 17 VCCORGB 22 VCCOCV 6 VCC CVOUT1/YOUTA 21
2 COMPOSITE VIDEO IN 3 4 LUMA IN 7 8 9 10 CHROMA IN 11 12
COMPOSITE VIDEO OUT
ROUT/YOUTC GOUT/YOUTD BOUT/COUT SWAP CVF SWAP CVU 13 14
18
16 15
H SYNC OUT
Figure 5. EVC (Enhanced Video Connector) Application: S-Video, Composite, plus H-Sync out
9
ML6427
19 GNDO
CVINU/Y1
5 GND
17 VCCORGB
22 VCCOCV
6 VCC
2
CVOUT1/YOUTA
COMPOSITE VIDEO IN
3
4
CVINFA/Y2
CVINFB/Y3
21
COMPOSITE VIDEO OUT
CVOUT2/YOUTB
ML6427 MASTER
LUMA IN
7
8
RINA/Y4
RINB/Y5
20
9
10
GINA/Y6
GINB/Y7
BINA/C1
BINB/C2
ROUT/YOUTC
GOUT/YOUTD
BOUT/COUT
18
LUMA OUT S-VIDEO OUT CHROMA OUT
CHROMA IN
11
12
16
15
SYNCIN 23
SYNCOUT 24
A/B MUX 1
SWAP CVF SWAP CVU 13 14
H SYNC OUT
24 SYNC OUT
CVINU/Y1
TO SCART CONNECTOR
23 SYNC IN
17 VCCORGB
22 VCCOCV
6 VCC
2
CVOUT1/YOUTA
3
4
CVINFA/Y2
CVINFB/Y3
21
R INPUT
7
8
RINA/Y4
RINB/Y5
ML6427 SLAVE
CVOUT2/YOUTB
20
RGB INPUT
G INPUT
9
10
GINA/Y6
GINB/Y7
BINA/C1
BINB/C2
ROUT/YOUTC
GOUT/YOUTD
BOUT/COUT
18
R OUTPUT G OUTPUT B OUTPUT
RGB VIDEO OUT
B INPUT
11
12
16
15
GNDO 19
GND 5
A/B MUX 1
SWAP CVF SWAP CVU 13 14
Figure 6. SCART (Peritel) + S-Video Application: S-Video, RGB, Composite, plus H-Sync out
10
ML6427
1k
19 GNDO CVINU/Y1 CVINFA/Y2 CVINFB/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 CV0 3 4 7 1k 8 LUMA IN 9 10 CHROMA IN 11 12
21
CVOUT2/YOUTB ML6427 MASTER ROUT/YOUTC GOUT/YOUTD BOUT/COUT
20
CVL
18
CV+ (80dB/DECADE ATTENUATION) LUMA OUT CHROMA OUT
COMPOSITE VIDEO OUT
16 15
S-VIDEO OUT
SYNCIN 23
SYNCOUT 24
A/B MUX 1
SWAP CVF SWAP CVU 13 14 H SYNC OUT
Figure 7a. Composite Loopback (Cascaded Filters) for Additional Attenuation
1k
19 GNDO CVINU/Y1 CVINFA/Y2 CVINFB/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 7 Y0 LUMA IN 8 9 1k CHROMA IN 10 11 12
21
CVOUT2/YOUTB ML6427 MASTER ROUT/YOUTC GOUT/YOUTD BOUT/COUT
20
COMPOSITE VIDEO OUT
18
YL Y+ (80dB/DECADE ATTENUATION) CHROMA OUT
16 15
S-VIDEO OUT
SYNCIN 23
SYNCOUT 24
A/B MUX 1
SWAP CVF SWAP CVU 13 14 H SYNC OUT
Figure 7b. Luma Loopback (Cascaded Filters) for Additional Attenuation Figure 7. CCIR656 and CCIR601 Application: Composite and Luma Loopback, plus H-Sync out
11
ML6427
VIDEO PLAYER
VIDEO RECORDER
0.1F 19 GNDO CV1 2 COMPOSITE VIDEO IN CV2 3 CV3 0.1F 4 7 VIDEO GAME CONSOLE 8 9 0.1F 10 CAMCORDER 11 12 CVINU/Y1 CVINFA/Y2 CVINFB/Y3 RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2 ROUT/YOUTC GOUT/YOUTD BOUT/COUT 18 ML6427 MASTER CVOUT2/YOUTB 5 GND 17 VCCORGB 22 VCCOCV 6 VCC CVOUT1/YOUTA
MODULATOR
220F 21
CV OUTPUT 1
20
COMPOSITE VIDEO OUT 220F
MODULATOR
16 15
TV
SYNCIN 23
SYNCOUT 24
A/B MUX 1
SWAP CVF SWAP CVU 13 14
A/B MUX 0 0 0 0 1 1 1 1
INPUTS SWAP CVU 0 0 1 1 0 0 1 1
SWAP CVF 0 1 0 1 0 1 0 1
OUTPUTS CVOUT1/YOUTA CVOUT2/YOUTB Video Player Video Player Camcorder Camcorder Video Player Video Player Video Game Console Video Game Console Camcorder Video Player Camcorder Video Player Video Game Console Video Player Video Game Console Video Player
Figure 8. Composite Channel Swapping Application: Multiple Composite Channel Multiplexing
12
ML6427
UNFILTERED R OSD (ON-SCREEN DISPLAY) PROCESSOR G B
80ns10ns DELAY
FILTERED ROUTPUT GOUTPUT BOUTPUT
ML6427 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
FAST BLANKING INTERVAL OR ALPHA-KEY SIGNAL
DELAY AT 13.5MHz IS APPROXIMATELY 74ns
Figure 9. 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 CVINU/Y1 CVINFA/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 ML6427 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
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 10. Basic Application for PAL
13
ML6427
-0.5 0
0.35dB WITH PEAKING
AMPLITUDE (dB)
0.5
1.7dB WITHOUT PEAKING
1
1.5
330pF 270pF 220pF none
2
2.5
0
1
2
3
4
5
6
7
8
FREQUENCY (MHz)
Figure 11. NTSC/PAL Video Frequency Response With and Without Peaking Capacitor
0
10
AMPLITUDE (dB)
20
NTSC/PAL -38dB WITH PEAKING
30
NTSC/PAL -42dB WITHOUT PEAKING
330pF
40
270pF 220pF none
50
0
3
6
9
12
15
18
21
24
27
30
FREQUENCY (MHz)
Figure 12. 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
330pF 270pF 220pF none
-20
0
1
2
3
4
5
6
7
8
9
10
FREQUENCY (MHz)
Figure 13. Group Delay at 5.5MHz (PAL) With and Without Peaking Capacitor
14
ML6427
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
U1
0.1F 2 FOURTH ORDER FILTER 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
MUX
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 C22 0.1F 3 4 FOURTH ORDER FILTER FOURTH ORDER FILTER FOURTH ORDER FILTER FOURTH ORDER FILTER 17 1F 0.1F C31 C32 VCCO 0.1F 2 MUX X2 X2
20
R17 75
CVOUT+ Y+
P1--SCART
MUX
X2
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 14. Typical Application Schematic
15
ML6427
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 ML6427CS TEMPERATURE RANGE 0C to 70C PACKAGE 24 Pin SOIC (S24)
16
08/05/99 Printed in U.S.A.
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks.
ACExTM BottomlessTM CoolFETTM CROSSVOLTTM DOMETM E2CMOSTM EnSignaTM FACTTM FACT Quiet SeriesTM FAST
DISCLAIMER
FASTrTM GlobalOptoisolatorTM GTOTM HiSeCTM ISOPLANARTM MICROWIRETM OPTOLOGICTM OPTOPLANARTM PACMANTM POPTM
PowerTrench QFETTM QSTM QT OptoelectronicsTM Quiet SeriesTM SILENT SWITCHER SMART STARTTM SuperSOTTM-3 SuperSOTTM-6 SuperSOTTM-8
SyncFETTM TinyLogicTM UHCTM VCXTM
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life support device or system whose failure to perform can systems which, (a) are intended for surgical implant into be reasonably expected to cause the failure of the life the body, or (b) support or sustain life, or (c) whose support device or system, or to affect its safety or failure to perform when properly used in accordance with instructions for use provided in the labeling, can be effectiveness. reasonably expected to result in significant injury to the user. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design.
Preliminary
First Production
No Identification Needed
Full Production
Obsolete
Not In Production
This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only.
Rev. G

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