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| Video ICs Video signal switcher with test pattern generator BA7024 The BA7024 is a switching IC with built-in test-signal generator developed for use in VCRs. A frequency divider is used to divide a 500kHz reference signal and produce the horizontal synchronization signal and white signal. The test pattern image is two white lines on black background. *Applications recorders Video cassette *Features circuit and video signal switch on one chip. 1) TSG generator 2) Supports 5V sets. 3) Small 7-pin SIP package. *Block diagram LOGIC TSG OSC BA7024 VIDEO AMP SW VCC 1 VCC 2 OSC 3 4 GND 5 VIDEO OUT 6 TSG SW 7 VIDEO IN *Absolute maximum ratings (Ta = 25C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 8.0 400 - 25 ~ + 60 - 55 ~ + 125 Unit V mW C C Reduced by 4.0mW for each increase in Ta of 1C over 25C. 1 Video ICs BA7024 *Recommended operating conditions (Ta = 25C) Parameter Power supply voltage Symbol VCC Min. 4.5 Typ. 5.0 Max. 6.0 Unit V *Electrical characteristics (unless otherwise noted, Ta = 25C and VCC = 5V) Parameter Supply current Video amplifier Voltage gain Frequency characteristic Crosstalk TSG V / S ratio Peak level V/S VTSG 7/3 0.84 6.5 / 3.5 0.92 6/4 1.04 -- V Eb = 3V Eb = 3V GV F CT - 0.5 - 0.5 - 40 0 0 - 55 0.5 0.5 -- dB dB dB f = 1MHz, VIN = 2VP-P f = 1 ~ 5MHz TSG mode, V block oscillation stopped, Eb = 3V Symbol ICC Min. -- Typ. 7.5 Max. 11.5 Unit mA Conditions Eb = 3V, TSG operating *Measurement circuit LOGIC TSG OSC VCC BA7024 VIDEO AMP SW *Application example LOGIC TSG VIDEO AMP OSC VCC BA7024 SW 1 A VCC 0.01 F 2 100F 2700 pF 3 330pF ( V/ 4 VO 5 6 1F 10k RL + + E6 75 7 1F VIN 0.01F T.P.G 1 2 100F CSB 500 E23 3 330pF 2700 pF 4 1F 5 6 7 10k + + 1 VOUT S6 + VIN + 1F 10k R: 1k) 2 CERALOCK: CSB500E23 (MURATA) E6: H: TSG ON L: TSG OFF CERALOCK: CSB500E23 (MURATA) S6 1: TSG ON 2: TSG OFF Fig.1 Fig.2 2 Video ICs BA7024 *External dimensions (Units: mm) 16.8 0.2 4.9 0.2 2.8 0.2 9.6 0.5 1.2 1 7 2.54 0.6 0.8 1.3 0.3 0.1 3.5 0.5 SIP7 3 |
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