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LM1276 データシート(PDF) 7 Page - Texas Instruments |
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LM1276 データシート(HTML) 7 Page - Texas Instruments |
7 / 56 page OBSOLETE LM1276 www.ti.com SNOSAB9B – MAY 2005 – REVISED APRIL 2013 System Interface Signal Characteristics Unless otherwise noted: TA = 25°C, VCC = +5.0V, VIN = 0.7V, VABL = VCC, CL = 8 pF, Video Outputs = 2.0 VP-P. See (1) for Min and Max parameters and see (2) for Typicals. DAC parameters apply to all 4 DACs. Symbol Parameter Conditions Min Typ Max Units VVTH+ VFLYBACK Positive Switching Vertical Blanking triggered 2.0 V ensure VSPOT Spot Killer Voltage VCC Adjusted to Activate (3) 3.4 3.9 4.3 V VRef VRef Output Voltage (pin 2) 1.25 1.45 1.65 V VIL (SCL, SDA) Logic Low Input Voltage −0.5 1.5 V VIH (SCL, SDA) Logic High Input Voltage VCC + 3.0 V 0.5 IL (SCL, SDA) Logic Low Input Current SDA or SCL, Input Voltage = 0.4V ±10 µA IH (SCL, SDA) Logic High Input Voltage SDA or SCL, Input Voltage = 4.5V ±10 µA VOL (SCL, SDA) Logic Low Output Voltage IO = 3 mA 0.5 V fH Min Minimum Horizontal Frequency PLL and OSD Functioning 25 kHz fH Max Maximum Horizontal Frequency PLL and OSD Functioning 110 kHz IHFB IN Max Horizontal Flyback Input Current Absolute Maximum during 5 mA Flyback IIN Peak Current during Flyback Design Value 4 mA IHFB OUT Max Horizontal Flyback Input Current Absolute Maximum during Scan −700 µA IOUT Peak Current during Scan Not exact - Duty Cycle Dependent −550 µA IIN THRESHOLD IIN H-Blank Detection Threshold 0 µA tH-BLANK ON H-Blank Time Delay - On + Zero crossing of IHFB to 50% of output 45 ns blanking start. I24 = +1.5mA tH-BLANK OFF H-Blank Time Delay - Off − Zero crossing of IHFB to 50% of output 85 ns blanking end. I24 = −100µA VBLANK Max Maximum Video Blanking Level Test Setting 4, AC input signal 0 0.25 V fFREERUN Free Run H Frequency, Including H 42 kHz Blank tPW CLAMP Minimum Clamp Pulse Width See(4) 200 ns VCLAMP MAX Maximum Low Level Clamp Pulse Video Clamp Functioning 2.0 V Voltage VCLAMP MIN Minimum High Level Clamp Pulse Video Clamp Functioning 3.0 V Voltage ICLAMP Low Clamp Gate Low Input Current V23 = 2V −0.4 µA ICLAMP High Clamp Gate High Input Current V23 = 3V 0.4 µA tCLAMP-VIDEO Time from End of Clamp Pulse to Referenced to Blue, Red and Green 50 ns Start of Video inputs (1) Data sheet min/max specification limits are specified by design, test, or statistical analysis. The ensured specifications apply only for the test conditions listed. Some performance characteristics may change when the device is not operated under the listed test conditions. (2) Typical specifications are specified at +25°C and represent the most likely parametric norm. (3) Once the spot killer has been activated, the LM1276 remains in the off state until VCC is cycled (reduced below 0.5V and then restored to 5V). (4) A minimum pulse width of 200 ns is the specified minimum for a horizontal line of 15 kHz. This limit is specified by design. If a lower line rate is used then a longer clamp pulse may be required. Copyright © 2005–2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM1276 |
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同様の説明 - LM1276 |
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