参数资料
| 型号： | ISL81485IU-T |
| 厂商： | Intersil |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS485/422 5V HS 8-MSOP |
| 标准包装： | 2,500 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS422，RS485 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 带卷 (TR) |
6
Application Information
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.
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.
Receiver Features
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.
Receiver input resistance surpasses the RS-422 spec of
4k
, and meets the RS-485 “Unit Load” requirement of 12k
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).
The receiver easily meets the data rate supported by the
driver, and receiver outputs are three-statable via the active
low RE input.
FIGURE 5A. TEST CIRCUIT
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5. RECEIVER PROPAGATION DELAY
FIGURE 6A. TEST CIRCUIT
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6. RECEIVER ENABLE AND DISABLE TIMES
Test Circuits and Waveforms (Continued)
SIGNAL
GENERATOR
R
RO
RE
A
B
+1.5V
15pF
RO
3V
0V
tPLH
1.5V
VCC
0V
50%
tPHL
A
1k
VCC
GND
SW
PARAMETER
DE
A
SW
tHZ
0
+1.5V
GND
tLZ
0-1.5V
VCC
tZH
0
+1.5V
GND
tZL
0-1.5V
VCC
SIGNAL
GENERATOR
R
RO
RE
A
B
15pF
RO
3V
0V
1.5V
VOH
0V
1.5V
VOH - 0.5V
tHZ
RO
VCC
VOL
1.5V
VOL + 0.5V
tLZ
RE
OUTPUT HIGH
OUTPUT LOW
tZL
tZH
ISL81485
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL81485IUZ | 制造商:Intersil Corporation 功能描述:LINE TRNSCVR 1TR 1TX 1RX 8MSOP - Rail/Tube 制造商:Intersil 功能描述:INTERSIL RS-485 HI SPD 40MBPS IND |
| ISL81485IUZ-T | 制造商:Intersil Corporation 功能描述:LINE TRNSCVR 1TR 1TX 1RX 8MSOP - Tape and Reel 制造商:Intersil 功能描述:INTERSIL RS-485 HI SPD 40MBPS IND |
| ISL81486 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:5V, Ultra High Speed, PROFIBUS, RS-485/RS-422 Transceivers |
| ISL81486IB | 功能描述:RS-422/RS-485 接口 IC 5V TXRX RoHS:否 制造商:Maxim Integrated 数据速率:1136 Kbps 工作电源电压:3 V to 5.5 V 电源电流:5.9 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-28 封装:Tube |
| ISL81486IB-T | 功能描述:IC TXRX RS485/422 5V HS 8-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:25 系列:- 类型:收发器 驱动器/接收器数:2/2 规程:RS232 电源电压:4.5 V ~ 5.5 V 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 供应商设备封装:16-PDIP 包装:管件 |
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