产品详细信息

Drivers per package 3 Receivers per package 5 Logic voltage (Min) (V) 3.3 Data rate (Max) (kbps) 600 Main supply voltage (Nom) (V) 3.3, 5 Features Auto-Powerdown ESD HBM (kV) 15 Rating Catalog Operating temperature range (C) -40 to 85, 0 to 70 Vout (Typ) (V) 5.4
Drivers per package 3 Receivers per package 5 Logic voltage (Min) (V) 3.3 Data rate (Max) (kbps) 600 Main supply voltage (Nom) (V) 3.3, 5 Features Auto-Powerdown ESD HBM (kV) 15 Rating Catalog Operating temperature range (C) -40 to 85, 0 to 70 Vout (Typ) (V) 5.4
SOIC (DW) 28 184 mm² 17.9 x 10.3 SSOP (DB) 28 54 mm² 5.3 x 10.2 TSSOP (PW) 28 62 mm² 9.7 x 6.4 VQFN (RHB) 32 25 mm² 5.0 x 5.0
  • Single-Chip and Single-Supply Interface for IBM PC/AT Serial Port
  • ESD Protection for RS-232 Bus Pins
    • ±15-kV Human-Body Model (HBM)
    • ±8-kV IEC61000-4-2, Contact Discharge
    • ±15-kV IEC61000-4-2, Air-Gap Discharge
  • Meets or Exceeds Requirements of TIA/EIA-232-F and ITU v.28 Standards
  • Operates With 3-V to 5.5-V VCC Supply
  • Always-Active Noninverting Receiver Output (ROUT2B)
  • Designed to Transmit at a Data Rate up to 500 kbit/s
  • Low Standby Current . . . 1 µA Typ
  • External Capacitors . . . 4 × 0.1 µF
  • Accepts 5-V Logic Input With 3.3-V Supply
  • Designed to Be Interchangeable With Industry Standard '3243E Devices
  • Serial-Mouse Driveability
  • Auto-Powerdown Feature to Disable Driver Outputs When No Valid RS-232 Signal Is Sensed
  • Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB),
    and Thin Shrink Small-Outline (PW) Packages
  • Single-Chip and Single-Supply Interface for IBM PC/AT Serial Port
  • ESD Protection for RS-232 Bus Pins
    • ±15-kV Human-Body Model (HBM)
    • ±8-kV IEC61000-4-2, Contact Discharge
    • ±15-kV IEC61000-4-2, Air-Gap Discharge
  • Meets or Exceeds Requirements of TIA/EIA-232-F and ITU v.28 Standards
  • Operates With 3-V to 5.5-V VCC Supply
  • Always-Active Noninverting Receiver Output (ROUT2B)
  • Designed to Transmit at a Data Rate up to 500 kbit/s
  • Low Standby Current . . . 1 µA Typ
  • External Capacitors . . . 4 × 0.1 µF
  • Accepts 5-V Logic Input With 3.3-V Supply
  • Designed to Be Interchangeable With Industry Standard '3243E Devices
  • Serial-Mouse Driveability
  • Auto-Powerdown Feature to Disable Driver Outputs When No Valid RS-232 Signal Is Sensed
  • Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB),
    and Thin Shrink Small-Outline (PW) Packages

The TRS3243E device consists of three line drivers, five line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and ±8-kV ESD (IEC61000-4-2, Contact Discharge) protection on serial-port connection pins. The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. This combination of drivers and receivers matches that needed for the typical serial port used in an IBM PC/AT, or compatible. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the 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 250 kbit/s and a maximum of 30-V/µs driver output slew rate.

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.

The TRS3243EC is characterized for operation from 0°C to 70°C. The TRS3243EI is characterized for operation from –40°C to 85°C.

The TRS3243E device consists of three line drivers, five line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and ±8-kV ESD (IEC61000-4-2, Contact Discharge) protection on serial-port connection pins. The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. This combination of drivers and receivers matches that needed for the typical serial port used in an IBM PC/AT, or compatible. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the 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 250 kbit/s and a maximum of 30-V/µs driver output slew rate.

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.

The TRS3243EC is characterized for operation from 0°C to 70°C. The TRS3243EI is characterized for operation from –40°C to 85°C.

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类型 标题 下载最新的英文版本 日期
* 数据表 3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver, TRS3243E 数据表 (Rev. C) 2011年 10月 9日
技术文章 How the RS-232 transceiver’s regulated charge-pump circuitry works 2018年 6月 28日
应用手册 AN-438 Low Power RS-232C Driver and Receiver in CMOS (Rev. B) 2013年 4月 26日
应用手册 Understanding Power Requirements in RS-232 Applications (Rev. B) 2013年 4月 26日
应用手册 Removing Ground Noise in Data Transmission Systems 2007年 10月 5日
更多文献资料 RS-232 IEC ESD-Protected Devices From TI (Rev. A) 2007年 7月 27日
应用手册 TIA/EIA-232-F 的接口电路 (Rev. A) 2002年 9月 19日
应用手册 低电压、单电源 232 标准接口解决方案 (Rev. A) 2000年 9月 19日

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参考设计

TIDA-060008 — 将 RS-232 信令转换为 RS-485 信令的参考设计

This reference design provides a circuit of converting RS-232 signaling to RS-485 signaling. This allows for long-distance communication, since the range supported by RS-232 is normally less than 50 feet while the range for RS-485's can exceed 1000 feet. The design implements bidirectional (...)
参考设计

TIDA-00557 — 用于智能电网和变电站自动化的全调制解调器控制(8 线 RS232)模块参考设计

TIDA-00557 参考设计为采用 DB-9 插接式连接器的数据终端设备 (DTE) 提供一个接口作为真正的 RS-232(八路信号 + 接地)物理层接口,同时还支持数据通信设备 (DCE) 接口。此设计适用于智能电网 IED、保护继电器和变电站自动化领域。此设计满足 IEC61000-4-2 规定的 +-/ 8kV 接触放电 ESD 保护和 IEC61000-4-5 规定的 +/-1kV 浪涌保护。
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TIDA-00540 — RS-485/RS-232 多协议收发器参考设计

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封装 引脚 下载
SOIC (DW) 28 了解详情
SSOP (DB) 28 了解详情
TSSOP (PW) 28 了解详情
VQFN (RHB) 32 了解详情

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