参数资料
| 型号： | ISL3331IRZ |
| 厂商： | Intersil |
| 文件页数： | 5/25页 |
| 文件大小： | 0K |
| 描述： | IC TXRX 3.3V RS232/485 40-QFN |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 50 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 2/2 |
| 规程： | RS232，RS422，RS485 |
| 电源电压： | 3.15 V ~ 3.45 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-VFQFN 裸露焊盘 |
| 供应商设备封装： | 40-QFN 裸露焊盘（6x6） |
| 包装： | 管件 |
13
FN6361.0
May 20, 2008
Detailed Description
The ISL333x port supports dual protocols: RS-485/RS-422,
and RS-232. RS-485 and RS-422 are differential (balanced)
data transmission standards for use in high speed (up to
20Mbps) networks, or long haul and noisy environments.
The differential signalling, coupled with RS-485’s
requirement for an extended common mode range (CMR) of
+12V to -7V make these transceivers extremely tolerant of
ground potential differences, as well as voltages induced in
the cable by external fields. Both of these effects are real
concerns when communicating over the RS-485/RS-422
maximum distance of 4000’ (1220m). It is important to note
that the ISL333x don’t follow the RS-485 convention
whereby the inverting I/O is labeled “B/Z”, and the non
inverting I/O is “A/Y”. Thus, in the application diagrams,
the B/Z (A/Y) pins of the generic RS-485/RS-422 ICs.
The 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 9. The Tx and Rx enables aren’t required,
so connect RXEN and DEN to VCC through a 1kΩ resistor.
Conversely, RS-485 is a true multipoint standard, which
allows up to 32 devices (any combination of drivers that 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 8. A port set to RS-485/RS-422 mode
includes one Rx and one Tx. See Application Note AN1401
for details about implementing a three pin, selectable
RS-232/half-duplex RS-485 port.
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.
A port contains two transceivers (2 Tx and 2 Rx) in RS-232
mode.
Protocol selection is handled via the 485/232 logic pin.
FIGURE 8. TYPICAL HALF DUPLEX RS-485 NETWORK
FIGURE 9. TYPICAL RS-422 NETWORK
0.1F
+
D
R
VCC
GND
RA
RXEN*
DEN
DY
Y
Z
+3.3V
RT
0.1F
+
D
R
VCC
GND
RO
RE
DE
DI
A/Y
B/Z
+5V
0.1F
+
D
VCC
GND
RO
RE
DE
DI
A/Y
B/Z
+5V
R
RT
ISL333x
GENERIC 1/2 DUPLEX 485 XCVR
Tx/Rx
*QFN ONLY,
CONNECT RXEN TO GND
A
B
0.1F
+
D
R
VCC
GND
RA
DEN
DY
B
A
+3.3V
0.1F
+
D
R
VCC
GND
RO
DI
A
Z
+5V
0.1F
+
VCC
GND
RO
RE
+5V
R
RT
ISL3330 (MASTER)
GENERIC 422 Rx (SLAVE)
GENERIC FULL DUPLEX 422 XCVR (SLAVE)
A
B
RT
Y
Z
Y
B
1k
Ω
RXEN
ISL3330, ISL3331
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL3331IRZ-T | 功能描述:IC TXRX 3.3V RS232/485 40-QFN 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) |
| ISL3332 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:3.3V, ±15kV ESD Protected, Two Port, Dua Protocol RS-232/RS-485 Transceivers |
| ISL3332IAZ | 功能描述:RS-422/RS-485 接口 IC DL 3 3V MULTIPROTO TRANSC 2 8LD SSOP 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 |
| ISL3332IAZ-T | 功能描述:IC TXRX RS485/422 2PRT 28-SSOP 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) |
| ISL3333 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Worlda??s Most Power-Effi cient |
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