el1881 Intersil Corporation, el1881 Datasheet
el1881
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el1881 Summary of contents
Page 1
... The EL1881 is plug-in compatible with the industry-standard LM1881 and can be substituted for that part in 5V applications with lower required supply current. The EL1881 is available in the 8-pin PDIP and SO packages and is specified for operation over the full -40°C to +85°C temperature range. Ordering Information ...
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... Burst/Back Porch Delay, t See Figure 2 BD Burst/Back Porch Width, t See Figure 2 B Input Dynamic Range Video Input Amplitude to Maintain 50% Slice Spec Slice Level V SLICE 2 EL1881C = 25°C) Operating Ambient Temperature Range . . . . . . . . . .-40°C to +85°C Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150°C +0.5V Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .400mW 5V 25° ...
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... SET 3 EL1881C Composite sync pulse output; sync pulses start on a falling edge and end on a rising edge AC coupled composite video input; sync tip must be at the lowest potential (positive picture phase) Vertical sync pulse output; the falling edge of vert sync is the start of the vertical period Supply ground Burst/back porch output ...
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... Clamp Discharge Current vs Temperature R =681kΩ SET 11.4 11.3 5.5V 11.2 11.1 4.5V 11 10.9 10.8 10.7 -50 -25 0 Temperature (°C) Clamp Charge Current vs Temperature R =681kΩ SET 1.1 1. 0.95 0.9 0.85 -50 -25 0 Temperature (°C) 4 EL1881C V CLAMP R SET 1.535 1.525 5V 1.515 1.505 1.495 1.485 100 -50 V RSET R SET 1.24 1.235 1.23 1.225 5V 1.22 1.215 1.21 1.205 1 ...
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... R SET Composite Sync Prop Delay vs Temperature -50 -25 0 Temperature (°C) 5 EL1881C (Continued) Burst/Back Porch Delay vs R SET V 350 300 250 200 150 100 50 0 600 800 1000 200 (kΩ) SET Vertical Default Delay vs R SET ...
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... Vertical Sync Default Delay Time vs Temperature R =681kΩ SET 64.5 63.5 5.5V 62.5 5V 61.5 4.5V 60.5 59.5 -50 -25 0 Temperature (°C) Composite Sync to Odd/Even Delay Time R =681kΩ SET -50 -25 0 Temperature (°C) 6 EL1881C (Continued) 239 237 5V 235 233 231 229 100 100 1.4 1.2 4. 0.8 0.6 0.4 5.5V 0.2 ...
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... 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). * Signal 1a drawing reproduced with permission from EIA. 7 EL1881C FIGURE 1. STANDARD (NTSC INPUT) TIMING FN7018.1 ...
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... Expanded Timing Diagrams 8 EL1881C FIGURE 2. STANDARD VERTICAL TIMING FIGURE 3. NON-STANDARD VERTICAL TIMING FN7018.1 ...
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... This gives a period of 63.6µs and a time T = 58.9µs. The droop voltage will then 9 EL1881C FIGURE 4. STANDARD (NTSC INPUT) H. SYNC DETAIL 5.9mV. This is less than nominal sync tip amplitude of 286mV. The charge represented by this droop is replaced in a time given CV/I, where I = clamp charge current = 1mA ...
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... Vertical Sync is clocked out of the EL1881 on the first rising edge during the vertical serration phase. In the absence of vertical serration pulses, a vertical sync pulse will be forced out after the vertical sync default delay time, approximately 60µ ...
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... 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 11 EL1881C CLAMP SYNC TIP REF 1 ...