SN75C3243 3V 至 5.5V 多通道 RS-232 线路驱动器/接收器

The SN65C3243 and SN75C3243 consist of three line drivers, five line receivers, and a dual charge-pump circuit with ±15-kV ESD protection pin to pin (serial-port connection pins, including GND). This device provides the electrical interface between an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, this device includes an always-active noninverting output (ROUT2B), which allows applications using the ring indicator to transmit data while the device is powered down. The device operates at data signaling rates up to 1 Mbit/s and an increased slew-rate range of 24 V/µs to 150 V/µs.

Flexible control options for power management are available when the serial port is inactive. The auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is set low, both drivers and receivers (except ROUT2B) are shut off, and the supply current is reduced to 1 µA. Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur.

Auto-powerdown can be disabled when FORCEON and FORCEOFF are high and should be done when driving a serial mouse. With auto-powerdown enabled, the device is activated automatically when a valid signal is applied to any receiver input. The INVALID output is used to notify the user if an RS-232 signal is present at any receiver input. INVALID is high (valid data) if any receiver input voltage is greater than 2.7 V or less than –2.7 V or has been between –0.3 V and 0.3 V for less than 30 µs. INVALID is low (invalid data) if all receiver input voltages are between –0.3 V and 0.3 V for more than 30 µs. Refer to Figure 5 for receiver input levels

SN75C3243
Data Rate(kbps) 1000  
Drivers Per Package 3  
Receivers Per Package 5  
ESD HBM(kV) +/-15  
Supply Voltage(s)(V) 3.3 or 5.0  
ICC(Max)(mA) 1  
Operating Temperature Range(°C) 0 to 70  
Pin/Package 28SOIC, 28SSOP, 28TSSOP  
Approx. Price (US$) 1.10 | 1ku  
Rating Catalog  
Footprint MAX3243
SN75C3243 特性
SN75C3243 芯片订购指南
器件 状态 温度 价格 封装 | 引脚 封装数量 | 封装载体 丝印标记
SN75C3243DW ACTIVE 0 to 70 1.30 | 1ku SOIC (DW) | 28 20 | TUBE SN75C3243
SN75C3243DWE4 ACTIVE 0 to 70 1.30 | 1ku SOIC (DW) | 28 20 | TUBE SN75C3243
SN75C3243DWG4 ACTIVE 0 to 70 1.30 | 1ku SOIC (DW) | 28 20 | TUBE SN75C3243
SN75C3243DWR ACTIVE 0 to 70 1.10 | 1ku SOIC (DW) | 28 2000 | LARGE T&R SN75C3243
SN75C3243DWRE4 ACTIVE 0 to 70 1.10 | 1ku SOIC (DW) | 28 2000 | LARGE T&R SN75C3243
SN75C3243DWRG4 ACTIVE 0 to 70 1.10 | 1ku SOIC (DW) | 28 2000 | LARGE T&R SN75C3243
SN75C3243 质量与无铅数据
器件 环保计划* 铅/焊球涂层 MSL 等级/回流焊峰 环保信息与无铅 (Pb-free) DPPM / MTBF / FIT 率
SN75C3243DW Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN75C3243DW SN75C3243DW
SN75C3243DWE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN75C3243DWE4 SN75C3243DWE4
SN75C3243DWG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN75C3243DWG4 SN75C3243DWG4
SN75C3243DWR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN75C3243DWR SN75C3243DWR
SN75C3243DWRE4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN75C3243DWRE4 SN75C3243DWRE4
SN75C3243DWRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM SN75C3243DWRG4 SN75C3243DWRG4
SN75C3243 应用技术支持与电子电路设计开发资源下载
  1. SN75C3243 数据资料 dataSheet 下载.PDF
  2. TI 德州仪器RS-232 产品选型与价格 . xls
  3. Analog Signal Chain Guide (8.62 MB)
  4. Industrial Interface IC Solutions (101 KB)