TRS3221

具有 +/-15-kV IEC ESD 保护的 3V 至 5.5V 单通道 RS-232 线路驱动器/接收器

The device consists of one line driver, one line receiver with dedicated enable pin, and a dual charge-pump circuit with ±15-kV ESD protection pin-to-pin serial-port connection pins, including GND. The device meets the requirements of A/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 one 3-V to 5.5-V supply. The TRS3221 device operates at data signaling rates up to 250 kbps 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 automatic power-down 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 on the receiver input, the driver output is disabled and the supply current is reduced to 1 µA. The INVALID output notifies the user if an RS-232 signal is present at the receiver input.

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RS-232 Bus-Pin ESD Protection Exceeds

±15 kV Using Human-Body Model HBM

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Meets or Exceeds the Requirements of TIA/EIA-

232-F and ITU V.28 Standards

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Operates With 3-V to 5.5-V VCC Supply

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Operates up to 250 kbps

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One Driver and One Receiver

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Low Standby Current: 1-µA Typical

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External Capacitors: 4 × 0.1 µF

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Accepts 5-V Logic Input With 3.3-V Supply

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Alternative High-Speed Pin-Compatible

Device 1 Mbps

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SNx5C3221

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Automatic Power-Down Feature Automatically

Disables Drivers for Power Savings