ESD Protection Diodes | CM2009

VGA 端口伴随电路

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CM2009 联接在 PC 中嵌入的视频图形控制器、图形适配器卡或机顶盒与 VGA 或 DVI-I 端口联接器之间。CM2009 结合了用于所有信号的 ESD 保护、用于 DDC 信号的电平移位以及用于 SYNC 信号的缓冲。使用低电容电流转向二极管实施了用于视频、DDC 和 SYNC 线路的 ESD 保护。所有 ESD 二极管均适用于安全处理 IEC-61000-4-2 Level 4（如果存在 CBYP 则为 ±8KV 触点放电，如果不存在则为 ±4KV）的高电流尖峰。用于 DDC 信号引脚的 ESD 保护用于防止在所联接的监控器通电的情况下进行器件断电时出现的“回冲电流”。为 VIDEO、DDC 和 SYNC 信道提供单独的正向电源轨，以实现与低电压视频控制器集成电路的接口，从而提供多电源环境中的设计灵活性。两个非反向驱动器为来自视频控制器集成电路的 HSYNC 和 VSYNC 信号（SYNC1，SYNC2）提供缓冲。这些缓冲器接受 TTL 输入电平并将其转换为在接地和 VCC_SYNC 之间摆动的 CMOS 输出电平，通常为 5V。另外，每个驱动器均具有一系列端接电阻 (RT) 联接 SYNC_OUT 引脚，因此无需视频线的 HSYNC 和 VSYNC 线路通常所需的外部端接电阻。有三个版本带有不同的端接电阻值，允许以 65Ω (CM2009-00) 或 15Ω (CM2009-02) 典型值进行端接。15Ω(CM2009-02) 版本通常需要两个外部电阻，可以进行选择以匹配视频线 SYNC 线路的特性阻抗。两个 N 沟道 MOSFET 提供 DDC 控制器以比监控器更低电源电压运行时所需的电平移位功能。这些 MOSFETS (VCC_DDC) 的门极端子应联接电源轨。

  • VGA and DVI-I ports
  • Digital TV, Set Top Box, PC/Notebook, Gaming
  • Includes ESD protection, level-shifting, buffering and sync impedance matching
  • 7 channels of ESD protection for all VGA port connector pins meeting IEC-61000-4-2 Level 4 ESD requirements (±8kV contact discharge)
  • Very low loading capacitance from ESD protection diodes on VIDEO lines, 4pF maximum
  • Bi-directional level shifting N-channel FETs provided for DDC_CLK & DDC_DATA channels
  • 5V drivers for HSYNC and VSYNC lines

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CM2009-00QR

Contact Sales

Obsolete

CAD Model

Pb

A

H

P

QSOP-16

492-01

1

260

REEL

2500

N

VGA

7

Unidirectional

4.5

-

6

10

0.5

Price N/A

More Details

CM2009-02QR

Contact Sales

Obsolete

CAD Model

Pb

A

H

P

QSOP-16

492-01

1

260

REEL

2500

N

VGA

7

Unidirectional

4.5

-

6

10

0.5

Price N/A

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