收藏本站
Si860x
3.3. I 2 C Isolator Design Constraints
Table 13 lists the I 2 C isolator design constraints.
Table 13. Design Constraints
Design Constraint
To prevent the latch condition, the
isolator output low level must be
greater than the isolator input low
level.
Data Sheet Values
Isolator V OL 0.7 V typical
Isolator V IL 0.5 V typical
Input/Output Logic Low Level
Difference
Effect of Bus Pull-up Strength
and Temperature
This is normally guaranteed by the
isolator data sheet. However, if the
pull up strength is too weak, the out-
put low voltage will fall and can get
too close to the input low logic level.
? VSDA1, ? VSCL1 = 50 mV minimum These track over temperature.
If the pull up strength is too large,
The bus output low must be less
than the isolator input low logic
level.
Bus V OL = 0.4 V maximum
Isolator V IL = 0.41 V minimum
the devices on the bus might not pull
the voltage below the input low
range. These have opposite tem-
perature coefficients. Worst case is
hot temperature.
If the pull up strength is too large,
the isolator might not pull below the
Bus V IL 0.3 x V DD = 1.0 V minimum for bus input low voltage.
The isolator output low must be
V DD = 3.3 V
Si8600/02/05/06 Vol: –1.8 mV/C
less than the bus input low.
Isolator V OL = 0.8 V maximum
CMOS buffer: –0.6 mV/C
This provides some temperature
tracking, but worst case is cold tem-
perature.
3.4. I 2 C Isolator Design Considerations
The first step in applying an I 2 C isolator is to choose which side of the bus will be connected to the isolator A side.
Ideally, it should be the side which:
1. Is compatible with the range of bus pull up specified by the manufacturer. For example, the Si8600/02/05/06
isolators are normally used with a pull up of 0.5 mA to 3 mA.
2. Has the highest input low level for devices on the bus. Some devices may specify an input low of 0.9 V and
other devices might require an input low of 0.3 x Vdd. Assuming a 3.3 V minimum power supply, the side with
an input low of 0.3 x Vdd is the better side because this side has an input low level of 1.0 V.
3. Have devices on the bus that can pull down below the isolator input low level. For example, the Si860x input
level is 0.41 V. As most CMOS devices can pull to within 0.4 V of GND this is generally not an issue.
4. Has the lowest noise. Due to the special logic levels, noise margins can be as low as 50 mV.
Rev. 1.3
17
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