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| 型号： | MAX214CWI |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/12页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 PROG DTE/DCE28SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 25 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 3/5 |
| 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： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 管件 |
When using the minimum recommended capacitor
values, make sure the capacitance value does not
degrade excessively as the operating temperature
varies.
If in doubt, use capacitors with a
larger nominal value (for example, 2 times larger).
The effective series resistance (ESR) of the capaci-
tors may vary over temperature and increase
when below 0°C. ESR influences the amount of rip-
ple on V+ and V-, so if low ripple is required over
wide temperature ranges, use larger capacitors or
low-ESR types.
To reduce the output impedance at V+ and V-, use
larger capacitors (up to 10F). This can be useful
when “stealing” power from V+ or from V-.
Driver Outputs when Exiting Shutdown
Figure 3 shows the MAX214 driver outputs when exiting
shutdown. As they become active, the two driver out-
puts are shown going to opposite RS-232 levels (one
driver input is high, the other is low). Each driver is
loaded with 3k
in parallel with 2.5nF.
Power-Supply Bypassing
Decouple VCC to ground with a capacitor of the same
value as the charge-pump capacitors.
V+ and V- as Power Supplies
A small amount of power can be drawn from V+ and V-,
although this will reduce noise margins. See the
Output Voltage vs. Load Current graph in the
Typical
Operating Characteristics. Increasing the charge-
pump capacitor sizes up to 10F reduces the imped-
ance of the V+ and V- outputs.
High Data Rates
The MAX214 maintains the RS-232 ±5.0V minimum
driver output voltage even at high data rates. The
Typical Operating Characteristics show transmitter out-
put voltage levels driving 3k
in parallel with various
capacitive loads at data rates up to 120kbps.
MAX214
Programmable DTE/DCE,
+5V RS-232 Transceiver
_______________________________________________________________________________________
9
+5V
A
B
C
+10V
+5V
0V
-10V
0V
A = TRANSMITTER OUTPUT HIGH, +5V/div
B = TRANSMITTER OUTPUT LOW, +5V/div
C = SHDN INPUT, +5V/div
HORIZONTAL = 200
s
-5V
Figure 3. Transmitter Outputs When Exiting Shutdown
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX214CWI+ | 功能描述:RS-232接口集成电路 Prog DTE/DCE 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: |
| MAX214CWI+T | 功能描述:RS-232接口集成电路 Prog DTE/DCE 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: |
| MAX214CWIT | 制造商:MAX 功能描述:MAX214 MAXIM'98 1 REEL S3C5C |
| MAX214CWI-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: |
| MAX214EPI | 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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