MAX3318 - 具有 +/-15 KV ESD 保护的 2.5V 460Kbps RS-232 收发器

MAX3318是TI德州仪器公司的一款无产品，MAX3318是具有 +/-15 KV ESD 保护的 2.5V 460Kbps RS-232 收发器，本站介绍了MAX3318的封装应用图解、特点和优点、功能等，并给出了与MAX3318相关的TI元器件型号供参考。

MAX3318 - 具有 +/-15 KV 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 MAX3318 is a dual-driver, dual-receiver, RS-232 compatible transceiver. The device features auto-power-down 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 MAX3318 achieves a 1-μA supply current using the auto-power-down 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 power down 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-power-down 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 1 μA. By disconnecting the serial port or placing the peripheral drivers off, auto-power-down plus can be disabled when FORCEON and FORCEOFF are high. With auto-power-down 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)
- ±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-Power-Down Plus Option Features Flexible Power-Saving Mode
Operates From a Single 2.25-V to 3-V VCC Supply

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