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| Multimedia ICs 2-input, 1-output video signal switcher BA7654F The BA7654F is video signal switch consisting of two input pins (IN1 and IN2), one CTL pin (CTL), and one output pin (OUT). The inputs are sync-tip clamped (synchronous edge of the video input signals are aligned to the same voltage), and as the input impedance is extremely large, it is possible to use a small value for the clamp capacitor (the recommended capacitor is 0.01F (FZ) ceramic). *Applications other equipment using video signals VCRs, TVs, and *Featuresclamp capacitors can be used (ceramic, 1) Small 3000pF (Min.), 0.01F (FZ) (recommended)). 2) Low supply voltage operation possible supply voltage range is 3.7V to 7.7V. 3) Superimposition used for fast switching speed with low switching noise (70ns Typ.). 4) Low power consumption (when VCC = 5V, 25mW Typ.). 5) Wide dynamic range (when VCC = 5V, 3.1VP-P Typ.). 6) Excellent frequency characteristics (10MHz, 0dB Typ.). 7) Low interchannel crosstalk (- 70dB Typ.). 8) Voltage can be applied to the control pins even when VCC is not applied. *Selected output mode setting table CTL L H OUT IN1 IN2 *Absolute maximum ratings (Ta = 25C) Parameter Applied voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 9 500 - 25 ~ + 75 - 55 ~ + 125 Unit V mW C C Reduced by 50mW for each increase in Ta of 1C over 25 C. *Recommended operating conditions (Ta = 25C) Parameter Symbol VCC Operating power supply voltage Not designed for radiation resistance. Limits 4.0 ~ 7.0 Unit V 1 Multimedia ICs BA7654F *Block diagram IN1 1 8 GND CTL 2 7 OUT IN2 3 6 VCC Logic GND 4 5 Open. 2 Multimedia ICs BA7654F *Input / output circuits (1 / 2) Pin No. Pin name Reference voltage (VCC = 5V) Input/output impedance Vcc Equivalent circuit 1 IN 1 1.65V 10M or more IN1 100 50A Vcc 2.3V 2 CTL -- -- 50k CTLa 1.9V Vcc 3 IN 2 1.65V 10M or more IN1 100 50A GND 4 GND -- -- 3 Multimedia ICs BA7654F *Input / output circuits (2 / 2) Pin No. Pin name Reference voltage (VCC = 5V) Input/output impedance Equivalent circuit Vcc 6 VCC 0.5V -- Vcc 7 OUT 0.95V 26 ImA OUT Vcc 8 GND 0V -- GND 4 Multimedia ICs BA7654F *Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 5V) Parameter Power supply voltage Circuit current Maximum output level Voltage gain Interchannel crosstalk Frequency characteristics CTL switching voltage Symbol VCC ICC Vom GV Cta Gf VthL VthH Min. 3.7 2.7 2.6 - 0.5 -- - 3.0 -- 2.5 Typ. -- 5.0 3.1 0 - 70 0 -- -- Max. 7.7 8.2 -- + 0.5 -- + 1.0 1.0 -- Unit V mA VP-P dB dB dB V Conditions -- -- f = 1kHz, THD = 1.0% f = 1MHz, VIN = 1.0VP-P f = 4.43MHz, VIN = 1.0VP-P f = 10MHz/1MHz, VIN = 1.0VP-P Vcc-CTL Threshold Level Vth = Vcc-VF x 20 (V) 45 *Guaranteed design parameters (unless otherwise noted, Ta = 25C, VCC = 5V) Parameter Differential gain Differential phase Symbol DG DP Min. -- -- Typ. 0 0.5 Max. 0.5 1.0 Unit % deg Conditions VIN = 1.0VP-P standard staircase signal VIN = 1.0VP-P standard staircase signal *Measurement circuit SW7 1 2 1 Clump SW2 2 Clump 1 2 Vcc 1.0V 2.5V 3 6 C10 Logic C11 7 8 V Vector Scorp A 0.1 47 4 5 Open SW1 SW3 1 C1 C2 3300p 2 C3 3300p 3 C4 3300p 1.0V 1 C5 3300p 2 C6 3300p 3 3300p SG OSC OSC SG Fig. 1 5 Multimedia ICs BA7654F *Measurement conditions Parameter Circuit current Maximum output level Voltage gain Frequency characteristics Interchannel crosstalk Differential gain Differential phase IN 1 IN 2 IN 1 IN 2 IN 1 IN 2 IN 1IN 2 IN 2IN 1 IN 1 IN 2 IN 1 IN 2 Symbol Icc Vom 1 Vom 2 Gv 1 Gv 2 Gf 1 Gf 2 Cta1 - 2 Cta2 - 1 DG 1 DG 2 DP 1 DP 2 SW1 3 1 3 1 3 1 3 1 3 2 3 2 3 SW3 3 3 1 3 1 3 1 3 1 3 2 3 2 SW2 2 1 2 1 2 1 2 2 1 1 2 1 2 SW7 -- 1 1 1 1 1 1 1 1 2 2 2 2 Conditions -- f = 1kHZ THD = 1.0%1 VIN = 1.0VP-P f = 1MHz2 VIN = 1.0VP-P f = 1MHz and 10MHz3 VIN = 1.0VP-P f = 4.43MHz4 VIN = 1.0VP-P standard staircase signal VIN = 1.0VP-P standard staircase signal CTL switching level is substituted by performing the above measurements. 1 Connect a distortion meter to the output. After adding a f = 1kHz sine wave input from the OSC, adjust the input level so that the output 2 Apply to the input pin a VIN = 1.0VP-P, f = 1MHz sine wave input. Voltage gain GV = 20-log (VOUT / VIN) Frequency characteristics Gf = GV (f = 1MHz) - GV (f = 10MHz) Interchannel crosstalk Cta = 20log (VOUT / VIN) distortion is 1.0%. The output voltage at that time is the maximum output level Vom [VP-P]. 3 Apply to the input pin VIN = 1.0VP-P, f = 1MHz and 10MHz sine wave inputs. 4 Apply to the input pin a VIN = 1.0VP-P, f = 4.43MHz sine wave input. 6 Multimedia ICs BA7654F *Application examples BA7654F 0.01 C.Video IN 1 IN 1 Vcc 6 Vcc 0.01 C.Video IN 3 IN 2 47 0.1 5 Open OUT 7 C.Video OUT Logic 2 CTL 4 GND GND 8 Fig. 2 BA7654F 0.01 C.Video IN 1 IN 1 Vcc 6 Vcc 47 3 DC 1.7V(min) IN 2 0.1 5 Open OUT 7 C.Video OUT/DC OUT Logic 2 CTL 4 GND GND 8 Fig. 3 7 Multimedia ICs BA7654F *Operation notes clamp operation, the output (1) To ensure stable impedance of the previous stage connected to the inputs should be 1k or lower. (2) If large input clamp capacitors are used, the time constant of the circuit will mean that some time will be required until stable operation after power is applied. The value for the input clamp capacitors is 0.1F max. (0.01F (FZ) ceramic capacitor recommended). (3) If CTL pins are unstable when open. Set them to either H or L. (4) When using superimposition, the DC voltage directly applied to the inputs should be at least 1.7V. *External dimensions (Units: mm) 14.0 0.3 10.0 0.2 33 23 22 14.0 0.3 10.0 0.2 34 44 12 1 2.15 0.1 0.05 11 0.15 0.1 0.8 0.35 0.1 QFP44 8 1.2 0.15 |
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