- 您现在的位置：买卖IC网 > PDF目录1925 > IL3685E (NVE Corp/Isolation Products)PROFIBUS RS-485 INTERFACE ISO PDF资料下载
参数资料
| 型号： | IL3685E |
| 厂商： | NVE Corp/Isolation Products |
| 文件页数： | 2/16页 |
| 文件大小： | 0K |
| 描述： | PROFIBUS RS-485 INTERFACE ISO |
| 产品培训模块： | IsoLoop® Isolator |
| 标准包装： | 50 |
| 系列： | IsoLoop® |
| 类型： | 收发器，隔离式 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS485 |
| 电源电压： | 3 V ~ 5.5 V，4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 管件 |
| 其它名称： | 390-1132 IL3685E-ND Q4618328 |
IL3685
10
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
Fax: (952) 829-9189
www.IsoLoop.com
NVE Corporation
Termination and Fail-Safe Biasing
Internal Biasing Resistors
“Fail-safe biasing” forces a logic high state on “R” in response to an open-circuit condition between the bus “A” and “B” lines, or when no
drivers are active on the bus. IL3000-Series Isolated Transceivers include internal pull-up and pull-down resistors of approximately 30 k in the
receiver section (RFS-INT in Figure 2 below):
R
B
V
DD
30K
GND
A
5 V
R
FS-EXT
R
T
R
T
R
FS-EXT
R
FS-INT
R
FS-INT
Figure 2. Termination and internal and external fail-safe biasing resistors.
These internal resistors ensure fail-safe operation if there are no termination resistors and up to four RS-485 worst-case Unit Loads of 12 k.
Termination Resistors
Termination resistors should be on both ends of the network to minimize reflections. Values should be selected to match cable impedance; 220
resistors are typical for PROFIBUS.
External Fail-Safe Biasing Resistors
Termination resistors bring the differential voltage across the conductor pair close to zero with no active drivers. In this case, the idle bus is
indeterminate and susceptible to noise. External fail-safe biasing resistors (labeled RFS-EXT in Figure 2) at one end of the bus ensure fail-safe
operation with a terminated bus. Biasing should provide at least 200 mV across the conductor pair to meet the RS-485 input sensitivity
specification. Fail-safe resistors of 390 are common for PROFIBUS. They should be on only one node of the network. Using the same value
for pull-up and pull-down biasing resistors maintains balance for positive- and negative going transitions.
相关PDF资料 |
PDF描述 |
|---|---|
| IL41050TE | IC TXRX ISOLATED CAN HS 16SOIC |
| IL422-3V | ISOLATOR HS MAGNETC RS422 16SOIC |
| IL485E-3V | ISOLATOR HS MAG DIGITAL 16SOICW |
| IL485W | ISOLATOR HS MAG DIGITAL 16SOICW |
| IMQ82C55AZ96 | IC I/O EXPANDER 24B 44MQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IL3685VE | 功能描述:RS422, RS485 Digital Isolator 6000Vrms 3 Channel 40Mbps 30kV/μs CMTI 16-SOIC (0.295", 7.50mm Width) 制造商:nve corp/isolation products 系列:IsoLoop? 包装:管件 零件状态:有效 技术:GMR（大型磁阻传感） 类型:RS422，RS485 隔离式电源:无 通道数:3 输入 - 输入侧 1/输入侧 2:2/1 通道类型:单向 电压 - 隔离:6000Vrms 共模瞬态抗扰度（最小值）:30kV/μs 数据速率:40Mbps 传播延迟 tpLH / tpHL（最大值）:30ns，30ns 脉宽失真（最大）:- 上升/下降时间（典型值）:- 电压 - 电源:3 V ~ 5.5 V，4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商器件封装:16-SOIC 标准包装:50 |
| IL3726AN | 制造商:INTEGRAL 制造商全称:INTEGRAL 功能描述:Universal Speech Circuit with Dialler Interface |
| IL3842 | 制造商:IKSEMICON 制造商全称:IK Semicon Co., Ltd 功能描述:Fixed Frequency Current Mode PWM Controller |
| IL3842_11 | 制造商:IKSEMICON 制造商全称:IK Semicon Co., Ltd 功能描述:Fixed Frequency Current Mode PWM Controller |
| IL3842D | 制造商:IKSEMICON 制造商全称:IK Semicon Co., Ltd 功能描述:Fixed Frequency Current Mode PWM Controller |
发布紧急采购，3分钟左右您将得到回复。