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| 型号： | ISL81334IAZ-T |
| 厂商： | Intersil |
| 文件页数： | 6/28页 |
| 文件大小： | 0K |
| 描述： | TXRX ESD RS-485/422 2PORT 28SSOP |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 1 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 2/2 |
| 规程： | RS232，RS422，RS485 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 1241 (CN2011-ZH PDF) |
| 其它名称： | ISL81334IAZ-TDKR |
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14
FN6202.3
November 21, 2007
RS-422 is typically a point-to-point (one driver talking to one
receiver on a bus), or a point-to-multipoint (multidrop)
standard that allows only one driver and up to 10 receivers
on each bus. Because of the one driver per bus limitation,
RS-422 networks use a two bus, full duplex structure for
bidirectional communication, and the Rx inputs and Tx
outputs (no tri-state required) connect to different busses, as
shown in Figure 10.
Conversely, RS-485 is a true multipoint standard, which
allows up to 32 devices (any combination of drivers- must be
tri-statable - and receivers) on each bus. Now bidirectional
communication takes place on a single bus, so the Rx inputs
and Tx outputs of a port connect to the same bus lines, as
shown in Figure 9. Each port set to RS-485 /422 mode
includes one Rx and one Tx.
RS-232 is a point-to-point, singled ended (signal voltages
referenced to GND) communication protocol targeting fairly
short (<150’, 46m) and low data rate (<1Mbps) applications.
Each port contains two transceivers (2 Tx and 2 Rx) in
RS-232 mode.
Protocol selection is handled via a logic pin (SELX) for each
port.
.
ISL81334, ISL41334 Advantages
These dual protocol ICs offer many parametric
improvements versus those offered on competing dual
protocol devices. Some of the major improvements are:
15kV Bus Pin ESD - Eases board level requirements
2.7V Diff VOUT - Better Noise immunity and/or distance
Full Failsafe RS-485 Rx - Eliminates bus biasing
Selectable RS-485 Data Rate - Up to 20Mbps, or slewrate
limited for low EMI and fewer termination issues
High RS-232 Data Rate - >460kbps
Lower Tx and Rx Skews - Wider, consistent bit widths
Lower ICC - Max ICC is 2x to 4x lower than competition
Flow-Thru Pinouts - Tx, Rx bus pins on one side/logic pins
on the other, for easy routing to connector/UART
Smaller (SSOP and QFN) and Pb-free Packaging.
FIGURE 9. TYPICAL HALF DUPLEX RS-485 NETWORK
FIGURE 10. TYPICAL RS-422 NETWORK
0.1
μF
+
D
R
VCC
GND
RA
RXEN *
DE
DY
Y
Z
+5V
RT
0.1
μF
+
D
R
VCC
GND
RO
RE
DE
DI
A/Y
B/Z
+5V
0.1
μF
+
D
VCC
GND
RO
RE
DE
DI
A/Y
B/Z
+5V
R
RT
ISL81334, ISL41334
GENERIC 1/2 DUPLEX 485 XCVR
Tx/Rx
* QFN ONLY
A
B
0.1
μF
+
D
R
VCC
GND
RA
DE
DY
B
A
+5V
0.1
μF
+
D
R
VCC
GND
RO
DI
A
Z
+5V
0.1
μF
+
VCC
GND
RO
RE
+5V
R
RT
ISL81334, ISL41334 (MASTER)
GENERIC 422 Rx (SLAVE)
GENERIC FULL DUPLEX 422 XCVR (SLAVE)
A
B
RT
Y
Z
Y
B
1k
Ω
OR NC
ISL81334, ISL41334
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL81334IBZ | 功能描述:RS-422/RS-485 接口 IC W/ANNEAL SINGLE 5V MULTIPROTOCOL TRANSC 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 |
| ISL81334IBZ-T | 功能描述:TXRX ESD RS-485/422 2PORT 28SOIC RoHS:是 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:2,500 系列:- 类型:发射器 驱动器/接收器数:4/0 规程:RS422，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) |
| ISL81387 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:【15kV ESD Protected, 5V, Dual Protocol (RS-232/RS-485) Transceivers |
| ISL81387_07 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:【15kV ESD Protected, 5V, Dual Protocol (RS-232/RS-485) Transceivers |
| ISL81387IAZ | 功能描述:RS-422/RS-485 接口 IC W/ANNEAL SINGLE 5V MULTIPROTOCOL TRANSC 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 |
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