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参数资料
| 型号： | LM1253AAE/NA |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 画面叠加 |
| 英文描述： | ON-SCREEN DISPLAY IC, PDIP28 |
| 封装： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件页数： | 2/61页 |
| 文件大小： | 1671K |
| 代理商： | LM1253AAE/NA |
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Pin Descriptions (Continued)
Pin 13 — Clamp A positive going clamp signal is input on
this pin. Using this signal black level clamping of the video is
carried out directly on the input video that is AC coupled into
the high impedance preamplifier input, thus eliminating the
need for additional black level clamp capacitors.
Figure 29
shows the external schematic of pin 13,
Figure 17 shows the
internal schematic. An optional capacitor to ground may be
needed if noise interferes with the clamp signal.
Pin 14 — H Flyback H Flyback is an analog signal input from
the monitor horizontal scan. HBLANK is a digital signal
derived from the horizontal flyback pulse as shown in
Figure
9. An optional capacitor and/or resistor to ground may be
needed if noise interferes with the H Flyback signal.
The horizontal flyback from the monitor must be a clean
signal. There should be no ringing or other noise on the
flyback.
DS101265-70
FIGURE 8. Effect of ABL Voltage on V
OUT
LM1253A
www.national.com
10
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相关代理商/技术参数 |
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|---|---|
| LM1253AN | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Monolithic Triple 180 MHz I2C CRT Pre-amp With Integrated Analog On Screen Display (OSD) Generator |
| LM-1256 | 制造商:ROHM 制造商全称:Rohm 功能描述:16 x 16 matrix displays |
| LM-1256_1 | 制造商:ROHM 制造商全称:Rohm 功能描述:16】16 matrix displays |
| LM-1256LB1 | 制造商:ROHM 制造商全称:Rohm 功能描述:16】16 matrix displays |
| LM125AN | 制造商:NSC 制造商全称:National Semiconductor 功能描述:VOLTAGE REGULATORS |
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