TRS3227E中文资料具有 +/-15kV IEC-ESD 保护的 3V 至 5.5V 单通道 1Mbps RS-232 线路驱动器/接收器数据手册TI规格书

描述 Description

The TRS3227E consists of one line driver, one line receiver, and a dual charge-pump circuit with ±15-kV IEC ESD protection pin to pin (serial-port connection pins, including GND). 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. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. This device operates at data-signaling rates of 1 Mbit/s in normal operating mode and a maximum of 30-V/µs driver output slew rate. This device also features a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting. The TRS3227E achieves a 1-µA supply current using the auto-powerdown plus feature. This device automatically enters a low-power powerdown mode when the RS-232 cable is disconnected or the drivers of the connected peripherals are inactive for more than 30 s. They turn on again when they sense a valid transition at any driver or receiver input. Auto-powerdown saves power without changes to the existing BIOS or operating system. The TRS3227EC is characterized for operation from 0°C to 70°C. The TRS3227EI is characterized for operation from -40°C to 85°C.

特性 Features

• Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 Standards
• Operates at Least 1 Mbit/s
• External Capacitors . . . 4 × 0.1 µF
• Designed to Be Interchangeable With Industry Standard '3227E Devices
• ESD Protection for RS-232 I/O Pins
• ±8 kV — IEC61000-4-2, Contact Discharge
• Auto-Powerdown Plus Feature Automatically Disables Drivers for Power Savings
• APPLICATIONS
• PDAs and Palmtop PCs
• Digital Cameras
• Mobile Phones and Wireless Devices

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