The ST3243ECPR is a robust, low-power transceiver for RS-232 communication from STMicroelectronics. This integrated circuit is designed to meet the interface requirements for serial communication between devices such as computers, communication terminals, and modems, where space and low power consumption are valued.
Featuring a wide supply voltage range from 3V to 5.5V, the ST3243ECPR is highly versatile, making it suitable for a variety of applications, including battery-powered systems, portable devices, and desktop computers. It is capable of operating with very low supply current, an attribute that significantly extends battery life in portable applications.
The device has a proprietary low-dropout transmitter output stage, providing true RS-232 performance from a 3.0V to 5.5V supply with a dual charge pump. The charge pump requires only four small 0.1µF external capacitors for operation from a 3.3V supply. This allows the ST3243ECPR to deliver compliant RS-232 output levels even at lower supply voltages, which is not possible with traditional designs.
Equipped with an automatic power-down feature which powers down the on-chip power-supply and driver circuits when a connected peripheral is not in use, the ST3243ECPR ensures efficient power management. This feature significantly reduces power consumption, making it ideal for power-sensitive applications.
The ST3243ECPR supports data rates up to 250kbps and includes two drivers and two receivers. The receivers have a typical hysteresis of 0.5V, and the drivers have a typical output impedance of 300 ohms, facilitating data transmission over long cables or in noisy environments.
This transceiver is available in a 20-pin SSOP package and is characterized for operation from -40°C to 85°C, making it reliable in a broad range of industrial temperatures. With its combination of power efficiency, high data rate support, and small form factor, the ST3243ECPR is an excellent choice for designers looking for a high-performance RS-232 interface solution.
For more detailed specifications and application notes, visit the STMicroelectronics website or contact their support team.
