ML6427CS

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, 0.4º 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 ×2 SWAP MUX SYNC TIMER REQUIRED SYNC STRIP TRANSCONDUCTANCE ERROR AMP + – CVOUT1/YOUTA 21 4th-ORDER FILTER ×2 CVOUT/YOUTB 20 7 8 0.5V 4th-ORDER FILTER ×2 TRANSCONDUCTANCE ERROR AMP ROUT/YOUTC 18 + – 9 GINA/Y6 MUX TRANSCONDUCTANCE ERROR AMP 0.5V 4th-ORDER FILTER ×2 GOUT/YOUTD 16 GINB/Y2 10 BINA/C1 11 BINB/C2 12 A/B MUX 1 + – 0.5V 4th-ORDER FILTER ×2 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 ............................................. 150°C ESD ..................................................................... >2000V Storage Temperature Range...................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) ..................... 260°C Thermal Resistance (qJA) ...................................... 80°C/W OPERATING CONDITIONS Temperature Range ........................................ 0°C to 70°C 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=0.1µF 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 % º % 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 0.1µF 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 1µA during active video, resulting in a tilt of less than 1mV for 220µF output capacitors. A 1000µF 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 0.1µF 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 220µF 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 120ºC. 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 220µF 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 10µF, 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 220µF 75Ω VIDEO CABLES CV/Y MODULATOR 220µF CVOUT2/YOUTB ML6427 ROUT/YOUTC GOUT/YOUTD BOUT/COUT SYNCOUT 24 A/B MUX 1 SWAP CVF SWAP CVU 13 14 220µF 18 220µF 16 220µF 15 75Ω CV/Y 20 75Ω MODULATOR R/Y 75Ω G/Y 75Ω 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 A/B MUX 1 ROUT/YOUTC GOUT/YOUTD BOUT/COUT 18 LUMA OUT S-VIDEO OUT CHROMA OUT CHROMA IN 11 12 16 15 SYNCIN 23 SYNCOUT 24 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 A/B MUX 1 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 SWAP CVF SWAP CVU 13 14 Figure 6. SCART (Peritel) + S-Video Application: S-Video, RGB, Composite, plus H-Sync out 10 ML6427 1kΩ 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 1kΩ 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 1kΩ 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 1kΩ 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 0.1µF 19 GNDO CV1 2 COMPOSITE VIDEO IN CV2 3 CV3 0.1µF 4 7 VIDEO GAME CONSOLE 8 9 0.1µF 10 CAMCORDER 11 12 CVINU/Y1 CVINFA/Y2 CVINFB/Y3 RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2 A/B MUX 1 ROUT/YOUTC GOUT/YOUTD BOUT/COUT 18 ML6427 MASTER CVOUT2/YOUTB 5 GND 17 VCCORGB 22 VCCOCV 6 VCC CVOUT1/YOUTA MODULATOR 220µF 21 CV OUTPUT 1 20 COMPOSITE VIDEO OUT 220µF MODULATOR 16 15 TV SYNCIN 23 SYNCOUT 24 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 80ns±10ns 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 220µF 75Ω VIDEO CABLES CV/Y 330pF MODULATOR 220µF CVOUT2/YOUTB ML6427 ROUT/YOUTC GOUT/YOUTD BOUT/COUT SYNCOUT 24 A/B MUX 1 SWAP CVF SWAP CVU 13 14 220µF 18 220µF 16 220µF 15 75Ω CV/Y 20 330pF 75Ω MODULATOR R/Y 75Ω G/Y 75Ω 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 1µF FB1 VCCA FB2 C10 1µF 220µF R24 75Ω CVOUT1 MOVABLE JUMPER 1 JPx PERMANENT SHORT 3 2 C13 0.1µF VCCO C11 0.1µF CVIN1 C14 R1 75Ω C15 R2 75Ω C16 R3 75Ω C17 0.1µF 6 17 22 19 5 X2 21 C2 220µF R23 75Ω C33 330pF CVOUT2 YOUT1 U1 0.1µF 2 FOURTH ORDER FILTER FOURTH ORDER FILTER FOURTH ORDER FILTER FOURTH ORDER FILTER 14 13 MUX X2 CVIN2 20 C3 220µF YIN1 0.1µF 0.1µF 0.1µF 3 4 7 8 MUX R22 75Ω C34 330pF CVOUT2 YOUT1 YIN2 C18 R4 75Ω MUX X2 18 C4 16 220µF R21 75Ω YOUT2 9 10 P2—EVC 13 14 15 MUX X2 CIN1 C19 0.1µF 11 12 MUX X2 24 23 15 C5 220µF R20 75Ω COUT1 5 4 C20 JP5 32 1 JP2 1 23 R5 75Ω R6 1kΩ JP1 1 GND 2 3 0.1µF SW1-C 1 SW1-A SW1-B 5V 5 9 13 17 21 3 19 16 7 11 15 JP3 1 1 14 13 24 23 JP4 21 C6 220µF 1 2 3 2 HSYNCIN U2 C21 R7 1kΩ 1 R8 1kΩ JP6 2 BIN R10 1kΩ C25 GIN R11 75Ω C26 0.1µF 0.1µF 3 R9 1kΩ C23 C24 0.1µF 0.1µF 7 8 MUX C22 0.1µF 3 4 MUX FOURTH ORDER FILTER FOURTH ORDER FILTER FOURTH ORDER FILTER FOURTH ORDER FILTER 17 1µF 0.1µF C31 C32 VCCO 0.1µF 2 MUX X2 X2 20 R17 75Ω CVOUT+ Y+ P1—SCART X2 18 C7 220µF R16 75Ω BOUT 9 10 MUX X2 16 C8 220µF R15 75Ω GOUT 11 12 MUX 6 X2 22 0.1µF 0.1µF 19 5 15 C9 220µF R14 75Ω ROUT RIN C27 R12 75Ω C28 R13 75Ω 0.1µF C29 C30 VCCA CIN2 0.1µF 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) 0º - 8º 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 0°C to 70°C 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. ACEx™ Bottomless™ CoolFET™ CROSSVOLT™ DOME™ E2CMOSTM EnSignaTM FACT™ FACT Quiet Series™ FAST  DISCLAIMER FASTr™ GlobalOptoisolator™ GTO™ HiSeC™ ISOPLANAR™ MICROWIRE™ OPTOLOGIC™ OPTOPLANAR™ PACMAN™ POP™ PowerTrench  QFET™ QS™ QT Optoelectronics™ Quiet Series™ SILENT SWITCHER  SMART START™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8 SyncFET™ TinyLogic™ UHC™ VCX™ 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