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1FEATURES DESCRIPTION
2 The LM1881 Video sync separator extracts timing • AC Coupled Composite Input Signal
information including composite and vertical sync,
• >10 kΩ Input Resistance burst/back porch timing, and odd/even field
• <10 mA Power Supply Drain Current information from standard negative going sync NTSC,
PAL (1)
• Composite Sync and Vertical Outputs and SECAM video signals with amplitude from
0.5V to 2V p-p. The integrated circuit is also capable
• Odd/Even Field Output of providing sync separation for non-standard, faster
• Burst Gate/Back Porch Output horizontal rate video signals. The vertical output is
• Horizontal Scan Rates to 150 kHz produced on the rising edge of the first serration in
the vertical sync period. A default vertical output is • Edge Triggered Vertical Output produced after a time delay if the rising edge
• Default Triggered Vertical Output for Non- mentioned above does not occur within the externally
standard Video Signal (Video Games-Home set delay period, such as might be the case for a
Computers) non-standard video signal.
(1) PAL in this datasheet refers to European broadcast TV
standard “Phase Alternating Line”, and not to Programmable
Array Logic.
1features描述
2芯片LM1881视频同步分离提取定时•交流耦合的复合信号输入
信息包括复合和垂直同步,
•> 10 KΩ输入电阻爆裂/背上的时间,和奇/偶场
•< 10 mA电源漏电流信息标准负向同步NTSC制式,
苯丙氨酸解氨酶(1)
•复合同步和垂直输出和SECAM视频信号幅度
0.5v 2V的页的集成电路也能够
•奇数/偶场输出提供同步分离非标准,更快
•突发门/后阳台输出水平率视频信号。垂直输出是
•水平扫描速率150 kHz的产生在第一锯齿状边缘上升
垂直同步周期。一个默认的垂直输出是边触发垂直输出后产生的时间延迟,如果上升沿
•默认触发垂直输出为上述提到的不发生在外部
标准视频信号(视频游戏家庭设置延时周期,如有可能
非标准视频信号。
(1)本数据表中的PAL指的是欧洲广播电视
标准“相位交替线”,不可编程
逻辑阵列。
LM1881MX
SOP-8
NS
2017
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