TRS3318 - 具有 +/-15KV ESD 保护的 2.5V 460Kbps RS-232 收发器

TRS3318是TI德州仪器公司的一款无产品，TRS3318是具有 +/-15KV ESD 保护的 2.5V 460Kbps RS-232 收发器，本站介绍了TRS3318的封装应用图解、特点和优点、功能等，并给出了与TRS3318相关的TI元器件型号供参考。

TRS3318 - 具有 +/-15KV ESD 保护的 2.5V 460Kbps RS-232 收发器 - 无 - RS-232收发器 - 德州仪器

产品描述

The TRS3318 is a dual-driver, dual-receiver, RS-232 compatible transceiver. The device features auto-powerdown plus and enhanced electrostatic discharge (ESD) protection integrated into the chip. Driver output and receiver input are protected to ±8 kV using the IEC 61000-4-2 Air-Gap Discharge method, ±8 kV using the IEC 61000-4-2 Contact Discharge method, and ±15 kV using the Human-Body Model (HBM).

The device operates at a data rate of 460 kbps. The transceiver has a proprietary low-dropout driver output stage enabling RS-232-compatible operation from a 2.25-V to 3-V supply with a dual charge pump. The charge pump requires only four 0.1-μF capacitors and features a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting.

The TRS3318 achieves a 1-μA supply current using the auto-powerdown feature. This device automatically enters a low-power power-down mode when the RS-232 cable is disconnected or the drivers of the connected peripherals are inactive for more than 30 s. The device turns on again when it senses a valid transition at any driver or receiver input. Auto-powerdown saves power without changes to the existing BIOS or operating system.

This device is available in two space-saving packages: 20-pin SSOP and 20-pin TSSOP.

Flexible control options for power management are featured when the serial port and driver inputs are inactive. The auto-powerdown plus feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense valid signal transitions on all receiver and driver inputs for approximately 30 s, the built-in charge pump and drivers are powered down, reducing the supply current to 1μA. By disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus can be disabled when FORCEON and FORCEOFF are high. With auto-powerdown plus enabled, the device activates automatically when a valid signal is applied to any receiver or driver 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 (typical number). INVALID is low (invalid data) if all receiver input voltage are between –0.3 V and 0.3 V for more than 30 μs (typical number).

产品特性

ESD Protection for RS-232 I/O Pins
- ±15 kV Human-Body Model (HBM)
- ±8 kV IEC 61000-4-2, Contact Discharge
- ±8 kV IEC 61000-4-2, Air-Gap Discharge
300-μA Operating Supply Current
1-μA Low-Power Standby (With Receivers Active) Mode
Designed to Transmit at a Data Rate of 460 kbps
Auto-Powerdown Plus Option Features Flexible Power-Saving Mode
Operates From a Single 2.25-V to 3-V VCC Supply

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