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