MAX3232CAE+

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The MAX3232CAE is a CMOS line driver/receiver designed for RS-232 communication in the automotive environment. It delivers true RS-232 compatibility even under harsh operating conditions (−40°C to +105°C). The MAX3232CAE employs automotive-qualified 8-V to 30-V tolerance for VCC and includes up to 10kV ESD protection for the RS-232 I/O pins. This makes it ideal for in-vehicle connected systems, cellular phones, and portable equipment where input voltage transients can be as high as 28V. Due to its low power consumption, the device is perfect for automotive, industrial, military, and medical applications.

Application Field
The MAX3232CAE is an automotive-grade, low-power device that can be used in applications ranging from automotive communication to portable equipment. It is designed to meet the toughest automotive standards while reducing the cost and complexity of system design thanks to its low-power operation and small size of three SOT223 packages. These attributes make it suitable for automotive, industrial, military, and medical applications.

Working Principle
The MAX3232CAE is designed to meet true RS-232 compatibility, even when used in the harsh environment of a vehicle. The device achieves this by employing automotive-qualified 8-V to 30-V tolerance for VCC and up to 10kV ESD protection for the RS-232 pins. To make the device even more robust and reduce power consumption, it incorporates a low-power shutdown mode. In this mode, the device remains in the shutdown state until RTS/ DTR/CTS levels are asserted. Once enabled, RS-232 signals are processed by the device as normal. The device has two independent supply pins (power and logic) to enable external logic and signal level control between the MAX3232CAE and the microcontroller.

The MAX3232CAE is suitable for many automotive applications, including in-vehicle connected systems, cellular phones, and portable equipment. The device also acts as an ideal solution for applications requiring integrity and signal robustness in extreme temperature environments due to its 8-V to 30-V tolerance. The MAX3232CAE is an all-in-one device that delivers signal integrity, ESD protection, and low-power operation. Furthermore, its choice of three SOT223 packages facilitates miniaturization of the system design.

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