MAX3232EIPWG4

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The MAX3232EIPWG4 is a 3.0V to 5.5V low-power transceiver designed for RS-232 and V.28/V.24 communication interfaces. It consists of two drivers, two receivers and one transmitter. It is suitable for RS-232 and bipolar interfaces to V.28/V.24. It allows communication between 5.5V asynchronous logic and 3.0V or 5.0V communication equipments while providing RS-232level output by taking the CMOS or LVCMOS input. The MAX3232EIPWG4 operates with dual power supply, provides charge pump circuit for the negative voltagegenerator, low power consumption modes, and a shutdown pin that reduces the power consumption to less than 1µA. Its digital logic inputs provide true logic compatibility by using CMOS or LVCMOS compliant digital inputs. Its high immunity to ESD decreases the risk of damaging sensitive components. Therefore, the MAX3232EIPWG4 is ideal for portable applications such as bar code scanners, notebook computers, modems and printer interfaces.

Application Field

The MAX3232EIPWG4 transceiver is intended for multiple applications including keyboard and mouse interfaces, serial data links, portable computers, printers, modems, etc. It is available in 8-lead SO and VSSOP packages and can be used in applications that require a system to reliably transmit data across extended distance and speeds. Its maximum data rate can achieve up to 500kbps and its shutdown pin provides power reduction to 1µA. Therefore, it makes the solution extremely energy efficient. Additionally, its low power modes are useful for wireless body-monitoring systems with limited physical space and external batteries.

Working Principle

The MAX3232EIPWG4 drivers are designed with low supply current, low thresholds and low output impedance. It ensures that the drivers have fast setup and hold times, making it ideal for high-speed applications. When the input logic is at logic high, all the outputs of the drivers are pulled low, thus making the device go into a low power mode. This reduces the power consumption significantly. The receivers use the charge pump circuit to convert the conventional single power voltage between 5.5V to 3.0V into negative voltage. This allows the MAX3232EIPWG4 to receive RS-232 signals from the output of a computer. The outputs of the receivers are levels shifted and buffered such that the output of the receiver is TTL/CMOS compatible.

The CMOS/LVCMOS input of the MAX3232EIPWG4 allows for a transition region that is about 0.4V to 4.4V, allowing for a good signal reception. The wide input range ensures that the MAX3232EIPWG4 is more tolerant to system noise than conventional logic. Its high voltage tolerance to pin-to-pin ESD prevents static discharge from damaging the parts. The shutdown pin is provided to reduce the power consumption during idle time. This allows the part to maintain low power emissions and work continuously without the need to stop and start multiple times.

Overall, the MAX3232EIPWG4 is an excellent choice for portable applications which require reliable data transmission, low power consumption, and fast setup and hold times. It is designed with wide input range, fast logic transitions, high voltage tolerance, and low power consumption modes, making the MAX3232EIPWG4 a perfect long-distance data solution.

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