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| Multimedia ICs Input selector switch for high definition displays BA7657F / BA7657S The BA7657F and BA7657S are for high definition displays, and have internal switches for switching between broadband RGB signals and HD / VD signals, as well as an internal synchronization separator. These ICs simplify the designing of input units for deluxe displays. *ApplicationsHDTV, video board for personal computer, etc. CRT display, *Features on a single 5V power supply. 1) Operates 2) Internal broadband RGB switch (frequency characteristics: 230MHz, - 3dB). 3) Internal HD / VD switch. 4) Internal synchronization separator for synchronizing signals superimposed onto G signals. *Absolute maximum ratings (Ta = 25C) Parameter Power supply voltage Power dissipation BA7657F BA7657S Symbol VCC Pd Topr Tstg Limits 8.0 550 1200 - 25 ~ + 75 - 55 ~ + 125 Unit V mW C C Operating temperature Storage temperature Reduced by 5.5mW (BA7657F) or 12mW (BA7657S) for each increase in Ta of 1C over 25C. *Recommended operating conditions (Ta = 25C) Parameter Power supply voltage Symbol VCC Min. 4.5 Typ. 5.0 Max. 5.5 Unit V 1 Multimedia ICs BA7657F / BA7657S *Block diagram Red 1 input 1 24 HD 1 input 1 2 HD Sync signal detector 2 23 HD 2 input Green 1 input 3 22 HD output 1 Ground 4 2 21 Red output Blue 1 input 5 DET 20 VCC 1 Ground 6 2 19 Green output Red 2 input 7 Syncsepa 18 Composite video input (Sync on Green) Ground 8 17 Composite sync output Green 2 input 9 1 Logic 16 CTL (H: IN1, L: IN2) Ground 10 2 15 Blue output 1 Blue 2 input 11 2 14 VD output VD 1 input 12 13 VD 2 input 2 Multimedia ICs BA7657F / BA7657S *Pin descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 Pin name Red 1 input Function Color signal R1 input Pin No. 14 15 16 17 18 19 20 21 22 23 24 Pin name VD output Blue output Control Composite sync output Function Vertical synchronization signal VD output Color signal B output Control (high = IN1, low = IN2) Synchronization signal output HD Sync signal Detecting phase of the synchronization detector signal detector circuit Green 1 input Ground Blue 1 input Ground Red 2 input Ground Green 2 input Ground Blue 2 input VD 1 input VD 2 input Color signal G1 input Ground Color signal B1 input Ground Color signal R2 input Ground Color signal G2 input Ground Color signal B2 input Vertical synchronization signal VD1 input Vertical synchronization signal VD2 input Composite video Composite signal input input (Sync on Green) Green output VCC Red output HD output HD 2 input HD 1 input Color signal G output Power supply Color signal R output Horizontal synch. signal HD output Horizontal synch. signal HD2 input Horizontal synch. signal HD1 input *Output selection setting table CTL H L R IN1 IN2 G IN1 IN2 B IN1 IN2 HD IN1 IN2 VD IN1 IN2 *Input / output circuits R. G. B input VCC VCC 50 6.8k 1, 3, 5 7, 9, 11pin 100 21k 1k 5mA 15, 19, 21pin 12, 13 23, 24pin 1k VCC R. G. B output HD. VD input 35k 50k 15k 400 3 Multimedia ICs BA7657F / BA7657S HD. VD output VCC Control VCC 2.0k 100 35k 1k 16pin 15k 14, 22pin 50k 1.2k 660 15k HD sync signal detector Composite Video input Composite Sync output VCC VCC from DET out from HD out to sync sepa VCC 25k 25k 2pin 18pin 25k 100 25k 50A 17pin 4 Multimedia ICs BA7657F / BA7657S *Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 5.0V) Parameter Quiescent current Analog switch unit Maximum output level Voltage gain Input pin voltage gain deviation Block voltage gain deviation Input pin crosstalk 1 Block crosstalk 1 Digital switch unit Input high level voltage Input low level voltage Input high level current Input low level current Rise time Fall time Rise delay time Fall delay time Output high level voltage Output low level voltage Output high level current Output low level current SYNC separation unit Minimum SYNC separation level Output high level voltage Output low level voltage Output low level current Rise time Fall time Rising delay time Fall delay time Control unit Output high level voltage Output low level voltage Output high level current Output low level current VIH VIL IIH IIL 1.8 -- 80 -3 -- -- 100 -1 -- 1.2 130 -- V V A A VIN = 5.0V VIN = 0V Fig.1 Fig.1 Fig.1 Fig.1 VSMin. VOH VOL IOL TR TF TRD TFD - 50 4.5 -- 2 -- -- -- -- -- 5.0 0.2 -- 80 30 100 100 50 -- 0.5 -- 130 80 150 150 mVP-P V V mA ns ns ns ns Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 VIH VIL IIH IIL TR TF TRD TFD VOH VOL IOH IOL 1.8 -- 80 -3 -- -- -- -- 3.0 -- - 400 5 -- -- 100 -1 30 30 50 30 3.7 0.2 -- -- -- 1.2 130 -- 50 50 80 50 -- 0.4 -- -- V V A A ns ns ns ns V V A mA VIN = 5.0V VIN = 0V Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Vom GV GVI GVB CTI1 CTB1 2.8 - 1.0 - 0.2 - 0.2 -- -- -- - 0.5 0 0 - 50 - 50 -- 0 0.2 0.2 - 40 - 40 VP-P dB dB dB dB dB f = 1kHz f = 1MHz, VIN = 1VP-P f = 1MHz, VIN = 1VP-P f = 1MHz, VIN = 1VP-P f = 10MHz, VIN = 1VP-P f = 10MHz, VIN = 1VP-P Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.2 Symbol ICC Min. 20 Typ. 35 Max. 50 Unit mA Conditions Measurement circuit Fig.1 5 Multimedia ICs BA7657F / BA7657S *Guaranteed design parameters (unless otherwise noted, Ta = 25C, VCC = 5.0V) Parameter Analog switch unit Input pin crosstalk 2 Block crosstalk 2 Frequency characteristic deviation Input pin frequency characteristic deviation Block frequency characteristic deviation SYNC separation unit Symbol Min. Typ. Max. Unit Conditions Measurement circuit CTI2 CTB2 Gf GfI GfB -- -- -6 -1 -1 - 30 - 30 -3 0 0 - 15 - 15 -1 +1 +1 dB dB dB dB dB f = 230MHz, VIN = 1VP-P f = 230MHz, VIN = 1VP-P f = 1MHz / 230MHz, VIN = 1VP-P f = 1MHz / 100MHz, VIN = 1VP-P f = 1MHz / 100MHz, VIN = 1VP-P input waveform1 input waveform2 fH = 20kHz input waveform2 fH = 100kHz input waveform2 fH = 200kHz input waveform3 fH = 20kHz input waveform3 fH = 100kHz input waveform3 fH = 200kHz Fig.2 Fig.2 Fig.2 Fig.2 Fig.2 SYNC separation frequency SYNC separation pulse width 1 SYNC separation pulse width 2 SYNC separation pulse width 3 SYNC separation level 1 SYNC separation level 2 SYNC separation level 3 fH-R pwH1 pwH2 pwH3 VS1 VS2 VS3 200 3.0 0.5 0.3 300 100 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- kHz s s s s s s Fig.3 Fig.3 Fig.3 Fig.3 Fig.3 Fig.3 Fig.3 Input waveform (input to pin 3 or 9 [see illustration to right], Ro = 240) 1 Vs and pwH = variable. Vs and pwH are interrelated. Refer to characteristics graph. 2 Vs = 130mV, pwH = variable 3 pwH = 1s, Vs = variable Duration of horizontal synchronization signal Duty 25% (1H) Vr = 0.7V Vs = 130mV pwH = 1s 6 Multimedia ICs BA7657F / BA7657S *Measurement circuit 1.2V 5 1.8V 4 OSC5 75 5V A Oscilloscope 3 V Oscilloscope Network Analyzer SW14 V 1 20A 4 C1 C1: 0.01F C2: 47F OSC1 2 75 3 C1 SW7 4 C2 5 6 + SW17 C1 C2 + + + + + 3 1 SW1 2 1 470k 470pF 2 23 1 24 2 SW16 1 A 2 C1 C2 C1 C2 C1 SW15 2 1 SW2 2 3 22 1 2 3 C2 21 VCC = 5V 2 1F 1 6 1 SW4 2 7 18 4 19 A 3 1 SW3 2 5 20 75 1F OSC3 C2 1 C1 47F 0.01F + C2 + C1 Oscilloscope 2k VCC = 5V SW12 3 VCC = 5V 2k 2 1 V 3 SW11 2 1 1.2V 1.8V Oscilloscope 3 V SW10 2 1 V C2 + C1 C2 + + + + 1 SW5 2 9 16 C1 C2 10 C1 C2 C1 2 1 SW6 11 14 15 C2 12 1 2 3 A 5V A 75 OSC2 1.8V 1.2V 4 SW9SW8 5 2 1 13 Fig. 1 V 8 17 7 Multimedia ICs BA7657F / BA7657S *Electrical characteristic measurement conditions (1 / 2) Parameter Supply current Switch condition 11 3 Other 1 Analog switch unit (listings for color signal R switches only) Parameter Maximum output level R1 Maximum output level R2 Voltage gain R1 Voltage gain R2 Switch condition 1 2 1 2 1 2 1 2 1 2 3 1 1 1 1 4 1 1 1 1 5 1 1 1 1 6 1 1 1 1 7 1 1 1 1 11 1 2 1 2 14 1 1 1 1 Other 1 1 1 1 Digital switch unit (listings for synchronization signal VD switches only) Parameter Input voltage VD1, "H" level Input voltage VD2, "H" level Input voltage VD1, "L" level Input voltage VD2, "L" level Input current VD1, "H" level Input current VD2, "H" level Input current VD1, "L" level Input current VD2, "L" level Rise time Fall time Rise delay time Fall delay time Output voltage, "H" level Output voltage, "L" level Output current, "H" level Output current, "L" level Switch condition 8 1 2 1 2 1 2 1 2 1 1 1 1 1 1 1 1 9 4 4 5 5 2 2 1 1 3 3 3 3 2 1 2 1 10 1 1 1 1 1 1 1 1 3 3 3 3 1 1 2 2 11 1 2 1 2 1 2 1 2 1 1 1 1 1 1 1 1 15 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 16 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 17 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Other 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 8 Multimedia ICs SYNC separation unit Parameter Minimum SYNC separation level Output voltage, "H" level Output voltage, "L" level Output current, "L" level Rise time Fall time Rise delay time Fall delay time Switch condition 12 4 2 2 3 4 4 4 4 13 2 3 1 1 2 2 2 2 Other 1 1 1 1 1 1 1 1 BA7657F / BA7657S 9 Multimedia ICs BA7657F / BA7657S *Measurement circuit for frequency characteristics and crosstalk characteristics C1 1 + 50 C2 2 C1 3 Network Analyzer + 50 C2 240 4 C1: 0.01F C2: 47F C1 5 + 21 VCC = 5V 20 + 50 C2 0.01F 6 47F C1 240 7 + 19 Network Analyzer 50 C2 8 1.8V C1 9 + SW 16 1 1.2V 2 50 C2 10 15 240 Network Analyzer C1 11 + 50 C2 Fig. 2 10 Multimedia ICs BA7657F / BA7657S measurement *Procedure forcharacteristics of frequency characteristics and crosstalktocharacteristics (1) Frequency 230MHz) IN1. Use an oscillator to input a sine wave (VIN = 1.0VP-P, f = 1MHz / 230MHz) to the color signal pins. To select R1, G1 and B1: Set the switch to 1. To select R2, G2 and B2: Set the switch to 2. Gf1 = Gv (f = 1MHz) - Gv (230MHz) [dB] (2) Frequency characteristic deviation Use an oscillator to input a sine wave (VIN = 1.0VP-P, f = 1MHz / 100MHz) to the color signal pins. To select R1, G1 and B1: Set the switch to 1. To select R2, G2 and B2: Set the switch to 2. Gf1 = Gv (f = 1MHz) - Gv (100MHz) [dB] Gfl = Gf (IN1) - Gf (IN2) [dB] GfB = Gf (R1) - Gf (G1), Gf (G1) - Gf (B1), Gf (B1) - Gf (R1) [dB] (3) Input pin crosstalk (1) Use an oscillator to input a sine wave (VIN = 1.0VP-P, f = 10MHz) to IN1. Use a capacitor to connect IN2 to GND. Set the switch to 2, then select output IN2 and measure. CTI1 = 20log (VOUT / VIN) [dB] (4) Input pin crosstalk 2 Use an oscillator to input a sine wave (VIN = 1.0VP-P, f = Connect IN2 to the ground through a capacitor. Set the switch to 2, input to IN2, then measure. CTI2 = 20log (VOUT / VIN) [dB] (5) Block crosstalk 1 Use an oscillator to input a sine wave (VIN = 1.0VP-P, f = 10MHz) to G1 and B1. Connect R1 to the ground through a capacitor. Set the switch to 1 and measure the R output. CTB1R = 20log (VOUTR / VING1) [dB] Similarly, CTB1G = 20log (VOUTG / VINB1) [dB] CTB1B = 20log (VOUTB / VINR1) [dB] (6) Block crosstalk 2 Use an oscillator to input a sine wave (VIN = 1.0VP-P, f = 230MHz) to G1 and B1. Connect R1 to the ground through a capacitor. Set the switch to 1 and measure the R output. CTB2R = 20log (VOUTR / VING1) [dB] Similarly, CTB2G = 20log (VOUTG / VINB1) [dB] CTB2B = 20log (VOUTB / VINR1) [dB] *Circuit operation (1) Analog switches Used for switching between the two sets of RGB color signals. Connect the high voltage to CTL to select IN1, or the low voltage to select IN2. (2) Digital switches Used for switching between the two sets of HD / VD synchronization signals. Connect the high voltage to CTL to select the HD / VD synchronization signal for IN1, or the low voltage to select the HD / VD synchronization signal for IN2. (3) Synchronization separator Used to output the synchronization signal after separating it from the composite signal (Sync on Green). When the HD signal is input it activates the synchronization signal detector, stopping the synchronization separator. The length of time that the synchronization separator remains stopped is set according to the constant attached to the detector wave pin of the synchronization detector. Relationship between inputs and outputs Input HD -- VD Sync on Green -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- HD -- Output VD Composite Sync -- -- -- 11 Multimedia ICs BA7657F / BA7657S *Application example 0.01 + 1 24 IN1 R G B H V 75 75 47 / 6.3V 1 2 2 470K 0.01 + 23 470p HD OUT 3 22 47 / 6.3V 4 1 Red OUT 21 Ro VCC5V 2 0.01 + 5 DET 20 0.01 Ro + 47 / 6.3V 75 6 0.01 1 + 47 / 6.3V Green OUT VCC5V 68k 1 19 7 2 18 VCC5V Syncsepa 2k 17 Composite Sync OUT IN2 R G B H V 75 47 / 6.3V 8 0.01 9 1 Logic 16 47 / 6.3V 75 10 0.01 1 CTL IN1: H IN2: L 47 / 6.3V 75 12 + + Blue OUT 2 15 Ro VD OUT 14 11 2 13 Fig. 3 12 Multimedia ICs BA7657F / BA7657S *Electrical characteristic curves 4 2 0 VOLTAGE GAIN: GV (dB) CROSSTALK: CT (dB) -2 -4 -6 -8 - 10 - 12 - 14 1M 10M FREQUENCY: f (Hz) 100M 300M 10 0 PULSE WIDTH: pwH (s) - 10 - 20 - 30 - 40 - 50 - 60 - 70 - 80 - 90 1M 10M FREQUENCY: f (Hz) 100M 300M 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 20 sink level Vs 280mV 130mV 50mV Duty25% 40 60 80 100 120 140 160 180 200 FREQUENCY: fH (kHz) Fig. 4 Frequency characteristics Fig. 5 Interchannel crosstalk characteristics Fig. 6 Minimum SYNC separation characteristics *Operation notes Resistors attached to analog switch outputs Because analog switch frequency characteristics depend on output load capacity, set external resistance (Ro) so that the frequency characteristics remain flat. A too-large resistance will suppress the characteristic peak. *External dimensions (Units: mm) BA7657F BA7657S 15.0 0.2 24 7.8 0.3 5.4 0.2 13 24 22.9 0.3 13 6.5 0.3 1 12 0.15 0.1 0.51Min. 1.8 0.1 1 12 3.4 0.2 3.95 0.3 7.62 0.11 0.3 0.1 1.27 0.4 0.1 0.3Min. 0.15 1.778 0.5 0.1 0 ~ 15 SOP24 SDIP24 13 |
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