参数资料
| 型号： | CM1223-04SO |
| 厂商： | ON Semiconductor |
| 文件页数： | 7/13页 |
| 文件大小： | 0K |
| 描述： | TVS ARRAY ESD LOW 4CH SOT23-6 |
| 产品变化通告： | Product Obsolescence 30/Jun/2011 |
| 标准包装： | 3,000 |
| 电压 - 反向隔离（标准值）： | 3.3V |
| 电压 - 击穿： | 6V |
| 电极标记： | 4 通道阵列 - 双向 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 带卷 (TR) |
CM1223
BACKDRIVE PROTECTION
Backdrive protection is needed to block against backdrive current flowing from a high potential voltage node toward a lower
potential voltage node through the interface cable.
For example, consider a DVD player connected to a TV via an HDMI interface. If the DVD player is switched off and the
TV is left on, there is a possibility of reverse current flow back into the main power supply rail of the DVD player. Typically,
the DVD’s power supply has some form of associated bulk supply capacitance, and it is possible over time to charge that bulk
supply capacitance to some intermediate level.
If that level rises above the power ? on ? reset (POR) voltage level of some of the integrated circuits, the DVD player may not
reset properly when the DVD player is turned back on. This is largely because all CMOS logic exhibits a very high impedance
on the power rail node even when ”off”.
To avoid this situation, the CM1223 with integrated backdrive protection diode was designed to block backdrive current,
guaranteeing no more than 5 m A on any I/O pin when the I/O pin voltage is greater than the CM1223 supply voltage.
APPLICATION INFORMATION
Design Considerations
To realize the maximum protection against ESD pulses, care must be taken in the PCB layout to minimize parasitic series
inductances on the Supply/Ground rails as well as the signal trace segments between the signal input (typically a connector)
and the ESD protection device. Application of Positive ESD Pulse between Input Channel and Ground illustrates an example
of a positive 8 kV ESD pulse striking an input channel. The 8 kV ESD current pulse will divert along the path as indicated in
Application of Positive ESD Pulse between Input Channel and Ground, through the D1 diode and the Zener diode back to the
ground rail.
An ESD current pulse can rise from zero to its peak value in a very short time. For example, a level 4 contact discharge per
the IEC61000 ? 4 ? 2 standard results in a current pulse that rises from zero to 30 Amps in 1ns. The CM1223 has a fast response
time of less than 1ns and low clamp voltage to handle this pulse scenario.
Similarly for negative ESD pulses, parasitic series inductance from the V N pin to the ground rail will lead to drastically
increased negative voltage on the line being protected.
The CM1223 also has an integrated backdrive diode between V P and V N to prevent backdrive current flow from the powered
sources.
As a general rule, the ESD Protection Array should be located as close as possible to the point of entry of expected
electrostatic discharges.
http://onsemi.com
7
相关PDF资料 |
PDF描述 |
|---|---|
| FI-RE31S-VF-R1300 | CONN RCPT 31POS 0.5MM VERT SMD |
| 7100.1116.96 | FUSE 1.25A 250V TLAG 19MM PCB TR |
| 7100.1117.96 | FUSE 1.6A 250V T-LAG 19MM PCB TR |
| NPPN091BFLD-RC | CONN RECEPT 2MM SINGLE SMD 9POS |
| LT6200CS8-5#TRPBF | IC OPAMP R-R I/O 800MHZ 8SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CM1223-04ST | 制造商:CALMIRCO 制造商全称:California Micro Devices Corp 功能描述:Industry First Low Capacitance ESD Protection Arrays w/Backdrive Protection |
| CM1223-08MR | 功能描述:ESD 抑制器 8-Channel ESD Array Backdrive Protection RoHS:否 制造商:STMicroelectronics 通道:8 Channels 击穿电压:8 V 电容:45 pF 端接类型:SMD/SMT 封装 / 箱体:uQFN-16 功率耗散 Pd: 工作温度范围:- 40 C to + 85 C |
| CM1223-08MS | 制造商:CALMIRCO 制造商全称:California Micro Devices Corp 功能描述:Industry First Low Capacitance ESD Protection Arrays w/Backdrive Protection |
| CM1223-SBX2LW-Z | 制造商:Fema Electronics Corporation 功能描述: |
| CM1223-SGT2LW-Z | 制造商:Fema Electronics Corporation 功能描述: |
发布紧急采购，3分钟左右您将得到回复。