收藏本站
Si860x
3. Typical Application Overview
3.1. 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
Si860x 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 5.0 kV RMS , support I 2 C clock stretching, and operate to a maximum I 2 C bus speed of 1.7 Mbps.
3.2. 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 Si8600/02/05/06).
The following examples illustrate typical circuit configurations using the Si8600/02/05/06.
I 2 C/SMBus
Si8600/02/05/06
Unit 1
+
V IL
V OL
-
V IL
ISO1
I 2 C/SMBus
Unit 2
V OL
ISO2
Figure 9. Isolated Bus Overview (I 2 C Channels Only)
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.
16
Rev. 1.3
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
SI8621ED-B-IS IC ISOLATOR 2CH 5KV 16-SOIC
SI8631EC-B-IS1 IC ISOLATOR 3CH 3.75KV 16-SOIC
SI8641ED-B-IS IC ISOLATOR 4CH 5.0KV 16-SOIC
SI8652BD-B-IS IC ISOLATOR 5CH 5.0KV 16-SOIC
SI8662EC-B-IS1 IC ISOLATOR 6CH 3.75KV 16-SOIC
SI9910DY-E3 IC MOSFET DVR ADAPTIVE PWR 8SOIC
SI9912DY-T1-E3 IC DRIVER GATE HALF BRIDGE 8SOIC
SI9976DY-E3 IC DRVR MOSF 1/2BRDG N-CH 14SOIC
相关代理商/技术参数
SI8606AC-B-IS1R 制造商:Silicon Laboratories Inc 功能描述:3.75 KV BIDIRECTIONAL I2C ISOLATOR + 2 UNI CH, 1.7MHZ, NB SO - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC ISOLATOR BIDIR 3.75KV 16SOIC 制造商:Silicon Laboratories Inc 功能描述:3.75 kV Bidirect I2C ISO+2 Uni ch 1.7MHz
Si8606AD-B-IS 功能描述:隔离器接口集成电路 5kV Bidirect I2C Iso 2 Uni ch 1.7MHz WB RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube
SI8606AD-B-ISR 制造商:Silicon Laboratories Inc 功能描述:5.0 KV BIDIRECTIONAL I2C ISOLATOR + 2 UNI CH, 1.7MHZ, WB SOI - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC ISOLATOR BIDIR 5.0KV 16-SOIC 制造商:Silicon Laboratories Inc 功能描述:5.0 kV Bidirect I2C Iso+2 Uni ch 1.7MHz
SI860X 制造商:SILABS 制造商全称:SILABS 功能描述:Independent, bidirectional SDA and SCL isolation channels Open drain outputs with 35 mA sink current
SI8610 制造商:SILABS 制造商全称:SILABS 功能描述:LOW-POWER SINGLE AND DUAL-CHANNEL DIGITAL ISOLATORS
SI8610AB-B-IS 制造商:Silicon Laboratories Inc 功能描述:SINGLE CH 2.5KV ISOLATOR, 1M, 1/0, SOIC8, LEAD FREE - Rail/Tube 制造商:Silicon Laboratories Inc 功能描述:IC ISOLATOR 1CH 2.5KV 1M 8SOIC
SI8610AB-B-ISR 制造商:Silicon Laboratories Inc 功能描述:SINGLE CH 2.5KV ISOLATOR, 1M, 1/0, SOIC8, LEAD FREE - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC ISOLATOR 1CH 2.5KV 1M 8SOIC
SI8610BB-B-IS 制造商:Silicon Laboratories Inc 功能描述:SINGLE CH 2.5KV ISOLATOR, 150M, 1/0, SOIC8, LEAD FREE - Rail/Tube