ST3243CPR - Low Power 3V to 5.5V, 400kbps RS-232 Transceiver with Auto-Powerdown

The ST3243CPR is a robust RS-232 transceiver from STMicroelectronics, designed to operate with a supply voltage range of 3V to 5.5V. This integrated circuit is capable of data rates up to 400kbps and is ideal for portable or compact communication devices, where power efficiency and reliable data transmission are critical.

Key Features:

• Flexible Voltage Range: The device can function efficiently across a wide voltage range, making it suitable for various applications.
• High Data Rate: With a 400kbps transmission capability, the ST3243CPR can handle high-speed data requirements.
• Low Power Consumption: It is designed for low-power consumption, drawing only 1μA of supply current in Auto-Powerdown mode.
• Enhanced ESD Protection: The transceiver comes with integrated Electrostatic Discharge (ESD) protection circuitry, safeguarding the device against voltage spikes.
• Auto-Powerdown Feature: This feature helps to reduce power consumption further when no data is being transmitted or received.

Applications:

• Portable and Battery-Powered Devices
• PDAs and Notebooks
• Cellular Phones
• Peripherals

The ST3243CPR is not only designed for low power consumption but also for reliable communication, with a guaranteed data rate of 400kbps at worst-case load conditions. It provides a bidirectional communication interface between a TTL/CMOS data source and a serial RS-232 port. The transceiver contains two drivers and two receivers, supporting full-duplex communication.

This device also includes a proprietary low-dropout transmitter output stage, delivering 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, reducing the overall footprint and component count in the application.

The ST3243CPR is available in a variety of packages, including TSSOP, ensuring flexibility in design for space-constrained applications. Its automatic powerdown function, which reduces supply current to 1μA when the device is not in use, makes it an excellent choice for power-sensitive designs.