器件名称: EL1881CN
功能描述: Sync Separator, Low Power
文件大小: 319.12KB 共12页
简 介:EL1881C
EL1881C
Sync Separator, Low Power
Features
NTSC, PAL, SECAM, nonstandard video sync separation Fixed 70mV slicing of video input levels from 0.5VP-P to 2VP-P Low supply current - 1.5mA typ. Single +5V supply Composite, vertical sync output Odd/even field output Burst/back porch output Available in 8-pin PDIP and SO packages
General Description
The EL1881C video sync separator is manufactured using Elantec’s high performance analog CMOS process. This device extracts sync timing information from both standard and non-standard video input. It provides composite sync, vertical sync, burst/back porch timing, and odd/even field detection. Fixed 70mV sync tip slicing provides sync edge detection when the video input level is between 0.5VP-P and 2VP-P (sync tip amplitude 143mV to 572mV). A single external resistor sets all internal timing to adjust for various video standards. The composite sync output follows video in sync pulses and a vertical sync pulse is output on the rising edge of the first vertical serration following the vertical pre-equalizing string. For non-standard vertical inputs, a default vertical pulse is output when the vertical signal stays low for longer than the vertical sync default delay time. The odd/even output indicates field polarity detected during the vertical blanking interval. The EL1881C is plug-in compatible with the industry-standard LM1881 and can be substituted for that part in 5V applications with lower required supply current. ……
