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| 型号： | MAX232ECWE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 26/26页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 5V ESD-PROT 16SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 46 |
| 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： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 管件 |
| 产品目录页面： | 1401 (CN2011-ZH PDF) |
±15kV ESD-Protected, +5V RS-232 Transceivers
V+
MAX2_ _E
0.1
μF*
VCC
0.1
μF*
T_
R_
0.1
μF*
C1+
C1-
C2+
C2-
VCC
T_OUT
R_OUT
EN (EN)
SHDN (SHDN)
400k
Ω
5k
Ω
0.1
μF*
0.1
μF*
3k
Ω
+5V
R_IN
T_IN
MINIMUM SLEW-RATE TEST CIRCUIT
0V (+5V)
2500pF
V-
V+
0.1
μF*
VCC
0.1
μF*
R_
T_
0.1
μF*
C1+
C1-
C2+
C2-
VCC
T_OUT
R_OUT
EN (EN)
SHDN (SHDN)
400k
Ω
5k
Ω
0.1
μF*
0.1
μF*
7k
Ω
+5V
R_IN
T_IN
MAXIMUM SLEW-RATE TEST CIRCUIT
0V (+5V)
50pF
V-
( ) ARE FOR MAX213E
* 1
μF FOR MAX232E/MAX241E
MAX2_ _E
TRANSMITTER INPUT PULL-UP RESISTORS, ENABLE, AND SHUTDOWN ARE NOT PROVIDED ON THE MAX202E, MAX203E, AND MAX232E.
ENABLE AND SHUTDOWN ARE NOT PROVIDED ON THE MAX207E AND MAX208E.
Figure 3. Transition Slew-Rate Circuit
_______________Detailed Description
The MAX202E–MAX213E, MAX232E/MAX241E consist of
three sections: charge-pump voltage converters,
drivers (transmitters), and receivers. These E versions
provide extra protection against ESD. They survive
±15kV discharges to the RS-232 inputs and outputs,
tested using the Human Body Model. When tested
according to IEC1000-4-2, they survive ±8kV contact-
discharges and ±15kV air-gap discharges. The rugged
E versions are intended for use in harsh environments
or applications where the RS-232 connection is
frequently changed (such as notebook computers). The
standard (non-“E”) MAX202, MAX203, MAX205–
MAX208, MAX211, MAX213, MAX232, and MAX241 are
recommended for applications where cost is critical.
+5V to ±10V Dual Charge-Pump
Voltage Converter
The +5V to ±10V conversion is performed by dual
charge-pump voltage converters (Figure 4). The first
charge-pump converter uses capacitor C1 to double
the +5V into +10V, storing the +10V on the output filter
capacitor, C3. The second uses C2 to invert the +10V
into -10V, storing the -10V on the V- output filter
capacitor, C4.
In shutdown mode, V+ is internally connected to VCC by
a 1k
Ω pull-down resistor, and V- is internally connected
to ground by a 1k
Ω pull up resistor.
RS-232 Drivers
With VCC = 5V, the typical driver output voltage swing
is ±8V when loaded with a nominal 5k
Ω RS-232
receiver. The output swing is guaranteed to meet
EIA/TIA-232E and V.28 specifications that call for ±5V
minimum output levels under worst-case conditions.
These include a 3k
Ω load, minimum VCC, and
maximum operating temperature. The open-circuit
output voltage swings from (V+ - 0.6V) to V-.
Input thresholds are CMOS/TTL compatible. The
unused drivers’ inputs on the MAX205E–MAX208E,
MAX211E, MAX213E, and MAX241E can be left
unconnected because 400k
Ω pull up resistors to VCC
are included on-chip. Since all drivers invert, the pull up
resistors force the unused drivers’ outputs low. The
MAX202E, MAX203E, and MAX232E do not have pull
up resistors on the transmitter inputs.
Maxim Integrated
9
MAX202E–MAX213E, MAX232E/MAX241E
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相关代理商/技术参数 |
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|---|---|
| MAX232ECWE+ | 功能描述:RS-232接口集成电路 15kV ESD-Protected 5V RS232 Transceiver RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX232ECWE+G104 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX232ECWE+T | 功能描述:RS-232接口集成电路 15kV ESD-Protected 5V RS232 Transceiver RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX232ECWE+TG104 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX232ECWE-T | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
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