MAX3238EAI+

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The MAX3238EAI+ is a high-speed, low-power 3.0 V to 5.5 V RS-232 transceiver. This device is designed for RS-232 communications and features 6-V to 30-V fault-protected inputs and low standby-currents.

The MAX3238EAI+ has two channels of drivers and receivers, with each channel providing ESD protection that exceeds 25 kV. Each channel of this device includes a driver, receiver, and a receiver input clamp diode. The driver enables the transmitter to run from a single supply and operates from 3 V to 5.5 V, providing 5 mA of peak output current when the supply voltage (VCC) is 5.5 V and maximum receiver input levels of 15V. Its low power consumption makes it very suitable for portable and battery-powered applications.

The MAX3238EAI+ is offered in several packages, including space-saving wet-stack solutions and 28-pin, 14 mm × 14 mm lead-frame packages with exposed paddles to maximize thermal performance. This device meets the requirements of EIA/TIA-232, V.28, V.11, and V.24 standards and is designed to support data rates in excess of 250 kbps.

Application Field

The MAX3238EAI+ is mainly used for communications in RS-232 systems and for general-purpose inverting and non-inverting applications. It can be used in varying areas such as automation and control, detectors, computers/peripherals, communication systems, and automotive. The main use is found in high-speed data transmission and low-power applications.

It is also used in industrial and communications applications where output current is critical. Its high ESD protection and low operating power make the MAX3238EAI+ an ideal choice for hand-held and embedded applications. Its fault protection and low current drain reduce the risk of damage to components during power failure.

Working Principle

The MAX3238EAI+ transceiver consists of two separate circuit blocks, a driver and a receiver, each operating independently. Its dual-channel design is ideal for systems that require bidirectional communication.

The driver is designed to run from a single 3V to 5.5V supply and can provide up to 5mA of peak output current when the supply voltage is 5.5V. It is internally protected against fault conditions such as over-temperature, open-circuit, and output current protection. The driver also features a low-capacitance input stage to reduce propagation delay.

The receiver features ESD protection of up to 25kV and is internally protected against over-voltage, open-circuit, and current limiting. It can accept input levels up to 30V for operation and features a low- capacitance input stage to reduce propagation delay.

The MAX3238EAI+ transceiver offers maximum ESD and fault protection, while providing low power consumption and high-speed data transmission. It also meets the requirements of various RS-232 standards and is available in cost-effective packages.

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