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参数资料
| 型号： | MAX3465CSD+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/13页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS485/422 14-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 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： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 1407 (CN2011-ZH PDF) |
MAX3465–MAX3469
+5V, Fail-Safe, 40Mbps, Profibus RS-485/
RS-422 Transceivers
11
Applications Information
128 Transceivers on the Bus
The standard RS-485 receiver input impedance is 12k
Ω
(one unit load), and the standard driver can drive up to
32 unit loads. The MAX3465–MAX3469 family of trans-
ceivers has a 1/4-unit-load receiver input impedance
(48k
Ω), allowing up to 128 transceivers to be connect-
ed in parallel on one communication line. Any combina-
tion of these devices and/or other RS-485 transceivers
with a total of 32 unit loads or less can be connected to
the line.
Low-Power Shutdown Mode
(Except MAX3467)
Low-power shutdown mode is initiated by bringing
SHDN high (MAX3465/MAX3466), or both RE high and
DE low. In shutdown, the devices typically draw only
1A of supply current. RE and DE can be driven simul-
taneously; the devices are guaranteed not to enter shut-
down if RE is high and DE is low for less than 50ns. If
the inputs are in this state for at least 800ns, the devices
are guaranteed to enter shutdown.
Driver Output Protection
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus con-
tention. The first, a foldback current limit on the output
stage, provides immediate protection against short cir-
cuits over the whole common-mode voltage range (see
the
Typical Operating Characteristics). The second, a
thermal-shutdown circuit, forces the driver outputs into
a high-impedance state if the die temperature exceeds
+140°C.
Propagation Delay
Many digital encoding schemes depend on the difference
between the driver and receiver propagation delay times.
Typical propagation delays are shown in the
Typical
Operating Characteristics. The difference in receiver delay
times, |tPLH - tPHL|, is a maximum of 2ns. The driver skew
time |tPLH - tPHL| is also a maximum of 2ns.
Typical Applications
The MAX3465–MAX3469 transceivers are designed for
bidirectional data communications on multipoint bus
transmission lines. Figures 13 and 14 show typical net-
work applications circuits. To minimize reflections, the
line should be terminated at both ends in its character-
istic impedance, and stub lengths off the main line
should be kept as short as possible.
Profibus Termination
The MAX3465–MAX3469 are designed for driving
Profibus termination networks. With a worst-case load-
ing of two termination networks with 220
Ω termination
impedance and 390
Ω pullups and pulldowns, the dri-
vers can drive VA-B > 2.1V output.
Chip Information
PROCESS: BiCMOS
VID
ATE
RECEIVER
OUTPUT
B
A
R
Figure 12. Receiver Propagation Delay Test Circuit
Ordering Information (continued)
PART
TEMP RANGE
PIN-PACKAGE
MAX3466CSD
0°C to +70°C
14 SO
MAX3466CPD
0°C to +70°C
14 Plastic DIP
MAX3466ESD
-40°C to +85°C
14 SO
MAX3466EPD
-40°C to +85°C
14 Plastic DIP
MAX3467CSA
0°C to +70°C
8 SO
MAX3467CPA
0°C to +70°C
8 Plastic DIP
MAX3467ESA
-40°C to +85°C
8 SO
MAX3467EPA
-40°C to +85°C
8 Plastic DIP
MAX3468CSA
0°C to +70°C
8 SO
MAX3468CPA
0°C to +70°C
8 Plastic DIP
MAX3468ESA
-40°C to +85°C
8 SO
MAX3468EPA
-40°C to +85°C
8 Plastic DIP
MAX3469CSA
0°C to +70°C
8 SO
MAX3469CPA
0°C to +70°C
8 Plastic DIP
MAX3469ESA
-40°C to +85°C
8 SO
MAX3469EPA
-40°C to +85°C
8 Plastic DIP
Devices are also available in a lead(Pb)-free/RoHS-compliant
package. Specify lead-free by adding “+” to the part number
when ordering.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3465CSD+ | 功能描述:RS-422/RS-485 接口 IC 5V Fail-Safe 40Mbps Profibus Tcvr 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 |
| MAX3465CSD+T | 功能描述:RS-422/RS-485 接口 IC 5V Fail-Safe 40Mbps Profibus Tcvr 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 |
| MAX3465CSD-T | 功能描述:RS-422/RS-485 接口 IC 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 |
| MAX3465EPD | 功能描述:RS-422/RS-485 接口 IC 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 |
| MAX3465ESD | 功能描述:RS-422/RS-485 接口 IC 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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