el4583a Intersil Corporation, el4583a Datasheet
el4583a
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el4583a Summary of contents
Page 1
... Outputs are: composite sync, vertical sync, filter, burst/back porch, horizontal, no signal detect, level, and odd/even output (in interlaced scan formats only). The EL4583A sync slice level is set to the mid-point between sync tip and the blanking level. This 50% point is determined by two internal sample and hold circuits that track sync tip and back porch levels ...
Page 2
... At loss of signal (pin 10 high) the pull down current source switches to a value of 10µA 3. Tested for V 5V ± Current sourced from pin REF 2 EL4583A = 25°C) Operating Temperature Range . . . . . . . . . . . . . . . . .-40°C to +85°C Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves +0.5V Die Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150° ...
Page 3
... Width is a function of R SET 2. c/s, Vertical, Back porch and H are all active low Attenuation is a function see filter typical characteristics F 4. Vertical pulse width in absence of serrations on input signal 3 EL4583A = 33k 681k 5V, Video Input = 1V F SET DD = 1.6mA, unless otherwise specified. ...
Page 4
... Analog This is the ground return for the signal paths in the chips, R Ground 4 EL4583A PIN FUNCTION connected between this input and ground determines the input filter characteristic. Increasing R F connected between pin 2 and ground determines the value of the minimum signal which triggers LV on pin 2 ...
Page 5
... R vs HORIZONTAL SET FREQUENCY FILTER 3dB NOTE: For R minimum signal sensitivity specification complete loss of signal. 5 EL4583A BACK PORCH CLAMP ON TIME vs R SET LEVEL OUT (PIN 9) vs SYNC TIP AMPLITUDE FILTER ATTENUATION 3.58MHz < 1000k:, no signal detect output (pin 10) will default high at ...
Page 6
... Back porch goes low for a fixed pulse width on the trailing edge of video input sync pulses. Note that for serration pulses during vertical, the back porch starts on the rising edge of the serration pulse (with propagation delay). f. Horizontal sync output produces the true “H” pulses of nominal width of 5µs. It has the same delay as the composite sync. 6 EL4583A 1.8 1.6 1.4 1 ...
Page 7
... EL4583A FIGURE 2. FIGURE 3. 7 FN7503.1 August 1, 2005 ...
Page 8
... The user can exercise some control over the value 8 EL4583A FIGURE 4. STANDARD (NTSC INPUT) H. SYNC DETAIL of the input time constant by introducing an external pull-up resistance from pin 4 to the 5V supply. The maximum voltage across the resistance will be V level ...
Page 9
... The period of this pulse is again a function of I and will therefore track the scan rate OT set by RESET. 9 EL4583A and have The odd/even circuit (O/E) tracks the relationship of the TR horizontal pulses to the leading edge of the vertical output and will switch on every field at the start of vertical. Pin 13 is high during an odd field ...
Page 10
... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 10 EL4583A * Note: R must resistor SET FIGURE 5 ...