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ISL81485IB-T

更新时间： 2024-01-25 23:33:08
品牌 Logo 应用领域
英特矽尔 - INTERSIL /
页数 文件大小 规格书
11页 371K
描述
5V, 30Mbps, RS-485/RS-422 Transceiver

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ISL81485IB-T 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：TSSOP
包装说明：TSSOP, TSSOP8,.19针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.63
差分输出：YES驱动器位数：1
高电平输入电流最大值：0.000001 A输入特性：DIFFERENTIAL SCHMITT TRIGGER
接口集成电路类型：LINE TRANSCEIVER接口标准：EIA-422; EIA-485
JESD-30 代码：S-PDSO-G8JESD-609代码：e3
长度：3 mm湿度敏感等级：2
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
最小输出摆幅：1.5 V最大输出低电流：0.004 A
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP8,.19封装形状：SQUARE
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
电源：5 V认证状态：Not Qualified
最大接收延迟：30 ns接收器位数：1
座面最大高度：1.1 mm子类别：Line Driver or Receivers
最大压摆率：2.2 mA最大供电电压：5.5 V
最小供电电压：4.5 V标称供电电压：5 V
表面贴装：YES技术：BICMOS
温度等级：INDUSTRIAL端子面层：Matte Tin (Sn) - annealed
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：40
最大传输延迟：15 ns宽度：3 mm
Base Number Matches：1

ISL81485IB-T 数据手册

 浏览型号ISL81485IB-T的Datasheet PDF文件第3页浏览型号ISL81485IB-T的Datasheet PDF文件第4页浏览型号ISL81485IB-T的Datasheet PDF文件第5页浏览型号ISL81485IB-T的Datasheet PDF文件第7页浏览型号ISL81485IB-T的Datasheet PDF文件第8页浏览型号ISL81485IB-T的Datasheet PDF文件第9页 
ISL81485  
Tes t Circuits and Waveforms (Continued)  
RE  
3V  
0V  
15pF  
A
B
1.5V  
PLH  
1.5V  
PHL  
+1.5V  
RO  
R
A
t
t
V
SIGNAL  
GENERATOR  
CC  
50%  
50%  
RO  
0V  
FIGURE 5A. TEST CIRCUIT  
FIGURE 5B. MEASUREMENT POINTS  
FIGURE 5. RECEIVER PROPAGATION DELAY  
3V  
RE  
RE  
1.5V  
1.5V  
HZ  
B
1kΩ  
V
CC  
RO  
R
0V  
GND  
SW  
SIGNAL  
GENERATOR  
t
A
ZH  
t
15pF  
OUTPUT HIGH  
1.5V  
V
OH  
V
- 0.5V  
OH  
RO  
RO  
0V  
PARAMETER  
DE  
0
A
SW  
GND  
t
ZL  
t
LZ  
t
+1.5V  
-1.5V  
+1.5V  
-1.5V  
HZ  
V
CC  
t
0
V
CC  
LZ  
1.5V  
t
0
GND  
ZH  
V
+ 0.5V  
OL  
V
OL  
t
0
V
OUTPUT LOW  
ZL  
CC  
FIGURE 6A. TEST CIRCUIT  
FIGURE 6B. MEASUREMENT POINTS  
FIGURE 6. RECEIVER ENABLE AND DISABLE TIMES  
Receiver Features  
Application Information  
This device utilizes a differential input receiver for maximum  
noise immunity and common mode rejection. Input sensitivity  
is ±200mV, as required by the RS422 and RS-485  
specifications.  
RS-485 and RS-422 are differential (balanced) data  
transmission standards for use in long haul or noisy  
environments. RS-422 is a subset of RS-485, so RS-485  
transceivers are also RS-422 compliant. RS-422 is a point-  
to-multipoint (multidrop) standard, which allows only one  
driver and up to 10 (assuming one unit load devices)  
receivers on each bus. RS-485 is a true multipoint standard,  
which allows up to 32 one unit load devices (any  
combination of drivers and receivers) on each bus. To allow  
for multipoint operation, the RS-485 spec requires that  
drivers must handle bus contention without sustaining any  
damage.  
Receiver input resistance surpasses the RS-422 spec of  
4kΩ, and meets the RS-485 “Unit Load” requirement of  
12kΩ minimum, thereby allowing up to 32 devices on a bus.  
Receiver inputs function with common mode voltages as  
great as 7V outside the power supplies (i.e., +12V and -7V),  
making them ideal for long networks, or industrial  
applications, where induced voltages are a definite concern.  
The receiver includes a “fail-safe if open” function that  
guarantees a high level receiver output if the receiver inputs  
are unconnected (floating).  
Another important advantage of RS-485 is the extended  
common mode range (CMR), which specifies that the driver  
outputs and receiver inputs withstand signals that range  
from +12V to -7V. RS-422 and RS-485 are intended for runs  
as long as 4000’, so the wide CMR is necessary to handle  
ground potential differences, as well as voltages induced in  
the cable by external fields.  
The receiver easily meets the data rate supported by the  
driver, and receiver outputs are three-statable via the active  
low RE input.  
6
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