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| 型号： | MAX3238ECAI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/14页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 250KBPS 28-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 46 |
| 类型： | 线路收发器 |
| 驱动器/接收器数： | 5/3 |
| 规程： | RS232 |
| 电源电压： | 3 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： | 管件 |
| 产品目录页面： | 1406 (CN2011-ZH PDF) |
MAX3238E/MAX3248E
______________________________________________________________________________________
11
Transmitter Outputs when
Recovering from Shutdown
Figure 7 shows two transmitter outputs when recovering
from shutdown mode. As they become active, the out-
puts are shown going to opposite RS-232 levels (one
transmitter input is high, the other is low). Each trans-
mitter is loaded with 3k
in parallel with 2500pF. The
transmitter outputs display no ringing or undesirable
transients as they come out of shutdown. Note that the
transmitters are enabled only when the magnitude of V-
exceeds approximately 3V.
High Data Rates
The MAX3238E/MAX3248E maintain the RS-232 ±5.0V
minimum transmitter output voltage even at high data
rates. Figure 8 shows a transmitter loopback test cir-
cuit. Figure 9 shows a loopback test result at 120kbps,
VCC = 3.3V, C1–C4 = 0.1
F, CLOAD = 1000pF
2
s/div
T1IN
T1OUT
R1OUT
+5V
0
+5V
-5V
Figure 10. Loopback Test Result at 250kbps
VCC = 3.3V, C1–C4 = 0.1
F, CLOAD = 1000pF
2
s/div
T1IN
T1OUT
R1OUT
0
+5V
-5V
Figure 9. Loopback Test Result at 120kbps
4
s/div
5V/div
2V/div
T2OUT
T1OUT
FORCEON =
FORCEOFF
VCC = 3.3V, C1–C4 = 0.1
F, RLOAD = 3k, CLOAD = 2500pF
Figure 7. Transmitter Outputs when Recovering from Shutdown
or Powering Up
MAX3238E
MAX3248E
5k
R_ IN
R_ OUT
C2-
C2+
C1-
C1+
V-
V+
VCC
C4
C3*
C1
C2
VCC
FORCEOFF
T_ OUT
T_ IN
GND
VCC
*C3 CAN BE RETURNED TO VCC OR GND.
FORCEON
1000pF
Figure 8. Loopback Test Circuit
+3.0V to +5.5V, 10nA, 250kbps RS-232 Transceivers
with ±15kV ESD-Protected I/O and Logic Pins
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3238ECAI+ | 功能描述:RS-232接口集成电路 3-5.5V 250kbps 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: |
| MAX3238ECAI+T | 功能描述:RS-232接口集成电路 3-5.5V 250kbps 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: |
| MAX3238ECAI-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: |
| MAX3238ECDB | 功能描述:RS-232接口集成电路 3 to 5V Multichannel RS-232 Line Drv/Rcvr 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: |
| MAX3238ECDBG4 | 功能描述:RS-232接口集成电路 3-5.5V Multich RS- 232 Line Drvr/Rcvr 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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