- 您现在的位置：买卖IC网 > PDF目录21349 > SI8401AB-B-ISR (Silicon Laboratories Inc)ISOL DGTL 2.5KVRMS 2CH 8SOIC PDF资料下载
参数资料
| 型号： | SI8401AB-B-ISR |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 18/34页 |
| 文件大小： | 0K |
| 描述： | ISOL DGTL 2.5KVRMS 2CH 8SOIC |
| 视频文件： | Digital Isolation Overview Digital Isolators vs. Optocouplers |
| 标准包装： | 2,500 |
| 输入 - 1 侧/2 侧： | 2/1 |
| 通道数： | 2 |
| 电源电压： | 3 V ~ 5.5 V |
| 电压 - 隔离： | 2500Vrms |
| 数据速率： | 10Mbps |
| 输出类型： | 开路漏极 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页当前第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页
Si840x
4. Typical Application Overview
4.1. I 2 C Background
In many applications, I 2 C, SMBus, and PMBus interfaces require galvanic isolation for safety or ground loop
elimination. For example, Power over Ethernet (PoE) applications typically use an I 2 C interface for communication
between the PoE power sourcing device (PSE), and the earth ground referenced system controller. Galvanic
isolation is required both by standard and also as a practical matter to prevent ground loops in Ethernet connected
equipment.
The physical interface consists of two wires: serial data (SDA) and serial clock (SCL). These wires are connected
to open collector drivers that serve as both inputs and outputs. At first glance, it appears that SDA and SCL can be
isolated simply by placing two unidirectional isolators in parallel, and in opposite directions. However, this
technique creates feedback that latches the bus line low when a logic low asserted by either master or slave. This
problem can be remedied by adding anti-latch circuits, but results in a larger and more expensive solution. The
Si840x products offer a single-chip, anti-latch solution to the problem of isolating I 2 C/SMBus applications and
require no external components except the I 2 C/SMBus pull-up resistors. In addition, they provide isolation to a
maximum of 2.5 kV RMS , support I 2 C clock stretching, and operate to a maximum I 2 C bus speed of 1.7 Mbps.
4.2. I 2 C Isolator Operation
Without anti-latch protection, bidirectional I 2 C isolators latch when an isolator output logic low propagates back
through an adjacent isolator channel creating a stable latched low condition on both sides. Anti-latch protection is
typically added to one side of the isolator to avoid this condition (the “A” side for the Si8400/01/02/05).
The following examples illustrate typical circuit configurations using the Si8400/01/02/05.
I2C/SMBus
Unit 1
Si8400/01/02/05
+
V IL
V OL
-
V IL
ISO1
I 2 C/SMBus
Unit 2
V OL
ISO2
Figure 15. Isolated Bus Overview (Bidirectional Channels)
The “A side” output low (V OL ) and input low (V IL ) levels are designed such that the isolator V OL is greater than the
isolator V IL to prevent the latch condition.
18
Rev. 1.6
相关PDF资料 |
PDF描述 |
|---|---|
| 3-647477-2 | CONN RCPT 2POS 22AWG .100 RED |
| SI8462BA-A-IS1R | IC ISOLATOR DGTL 6CH 16SOIC |
| 3-644579-5 | CONN RCPT 5POS 24AWG MTA-100 |
| SI8463BA-A-IS1R | IC ISOLATOR DGTL 6CH 16SOIC |
| SI8461BA-A-IS1R | IC ISOLATOR DGTL 6CH 16SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SI8401DB | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:P-Channel 20-V (D-S) MOSFET |
| SI8401DB-T1 | 功能描述:MOSFET 20V 4.9A 1.47W RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| SI8401DB-T1-E1 | 功能描述:MOSFET 20V 4.9A 2.77W 65mohm @ 4.5V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| SI8401DB-T1-E3 | 功能描述:MOSFET 20V 4.9A 2.77W 65mohm @ 4.5V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| SI8401DB-T1-E3 | 制造商:Vishay Siliconix 功能描述:MOSFET |
发布紧急采购，3分钟左右您将得到回复。