SP232EET-L/TR

The MaxLinear SP232EET-L/TR is a low-power, high-speed RS-232 transceiver designed to interface between logic-level UART signals and RS-232 voltage levels. It provides a complete driver/receiver solution in a compact 16-pin SOIC package with integrated charge pumps for ±5 V RS-232 voltage generation from a single 3.0 V to 5.5 V supply. The device supports both full-duplex communication and multipoint RS-232 systems, offering robust signal integrity, low EMI, and enhanced protection features. Its low quiescent current and high data-rate capability make it suitable for portable, industrial, and embedded serial communication applications.

## Key Features

The SP232EET-L/TR integrates several critical features for efficient RS-232 interface operation:

* Low-Power Operation: Typical quiescent current 1 mA in active mode, 0.5 µA in shutdown, supporting battery-powered and low-power applications.
* Integrated Charge Pump: Generates RS-232 compliant voltage levels from a single 3.0 V to 5.5 V supply without external DC-DC converters.
* High Data Rate: Supports up to 250 kbps, ensuring fast, reliable serial communication for embedded and industrial systems.
* Full-Duplex Communication: Dual driver and dual receiver configuration supports simultaneous bidirectional data transmission.
* Wide Operating Temperature Range: –40°C to +85°C, suitable for industrial and automotive environments.
* Enhanced ESD Protection: ±15 kV HBM and ±8 kV MM testing, providing robust immunity to handling and field events.
* Driver Output Levels: RS-232 compliant output swing typically ±5 V at standard loads, ensuring compatibility with legacy systems.
* Receiver Input Sensitivity: Accepts ±30 V input range, tolerant to noise and transients on the RS-232 bus.
* Shutdown Mode: Reduces power consumption during idle periods, suitable for energy-efficient designs.
* Compact Package: 16-pin SOIC facilitates high-density PCB layouts and automated assembly.

## Electrical Specifications

The SP232EET-L/TR electrical characteristics enable reliable RS-232 interface performance:

* Supply Voltage (VCC): 3.0 V to 5.5 V, supporting logic-level compatibility with 3.3 V and 5 V microcontrollers.
* Driver Output Voltage (VOUT): ±5 V typical with 3 kΩ load to GND, meeting RS-232 voltage requirements.
* Driver Output Current: ±10 mA typical, ±20 mA maximum, ensuring sufficient current drive for standard RS-232 line loads.
* Receiver Input Voltage Range (VRI): ±30 V, tolerating overvoltage and noise spikes.
* Receiver Thresholds: VIH 1.3 V typical, VIL –1.3 V typical, providing reliable signal detection.
* Driver Rise/Fall Time: Typically 200 ns at VCC = 5 V and RL = 3 kΩ, ensuring minimal signal distortion.
* Data Rate: Up to 250 kbps, enabling high-speed serial communication for embedded systems.
* Quiescent Supply Current (ICC): 1 mA typical at 5 V active, 0.5 µA in shutdown, optimizing low-power operation.
* ESD Ratings: ±15 kV Human Body Model (HBM), ±8 kV Machine Model (MM), ensuring robust protection during assembly and handling.

## Functional Characteristics

The SP232EET-L/TR is designed for robust serial communication:

* Full RS-232 Compliance: Meets TIA/EIA-232-F and TIA/EIA-561 standards for voltage levels and signal swing.
* Automatic Output Slew Control: Reduces EMI and ringing on long or capacitive lines.
* Receiver Hysteresis: ±200 mV typical, improves noise immunity and ensures stable logic transitions.
* Logic-Level Compatibility: Directly interfaces with UART, SPI, or MCU logic levels without external resistors or level shifters.
* Charge Pump Capacitor Requirements: Minimal external capacitors (typically four 0.1 µF) are required to generate RS-232 output levels, simplifying PCB design.

## Package and Mechanical Features

The device is designed for high-density PCB integration:

* Package Type: 16-pin SOIC with standard 300 mil body width.
* Thermal Performance: Junction-to-ambient thermal resistance RθJA = 120°C/W in free air, enhanced with copper pour on PCB.
* Pinout Configuration: Includes dual drivers, dual receivers, VCC, GND, and charge pump capacitor connections.
* Soldering Compatibility: Lead-free and compatible with standard reflow soldering processes.
* Footprint: Compact design allows high-density placement in industrial, automotive, and embedded PCBs.

## Applications

The SP232EET-L/TR is suitable for a variety of serial communication applications:

* Embedded Systems: Interfaces microcontrollers with RS-232 peripherals, modems, and legacy serial devices.
* Industrial Automation: Reliable communication between PLCs, motor controllers, and sensor networks over RS-232.
* Portable Devices: Low-power consumption makes it ideal for handheld instruments, battery-powered data loggers, and test equipment.
* Point-of-Sale Terminals: Interfaces POS devices with RS-232-based peripherals and printers.
* Networking Equipment: Provides reliable serial communication for configuration, monitoring, or control interfaces.
* Consumer Electronics: Connects PCs, modems, and legacy serial interfaces in entertainment or automation systems.

## Reliability and Compliance

The SP232EET-L/TR is engineered for robust operation and long-term reliability:

* Temperature Range: –40°C to +85°C, ensuring stable operation in industrial and automotive environments.
* ESD Robustness: ±15 kV HBM and ±8 kV MM to protect against handling and field-induced electrostatic discharge.
* Low-Power Design: Shutdown mode minimizes power consumption in idle states, extending battery life in portable applications.
* RoHS Compliant: Lead-free and environmentally friendly, suitable for modern electronics manufacturing.
* High Reliability: Charge pump design and internal protections ensure long operational lifetime across varying loads and temperatures.

## Summary

The MaxLinear SP232EET-L/TR is a high-performance, low-power RS-232 transceiver with integrated charge pumps and dual driver/receiver architecture. Its ability to operate from a single 3.0 V to 5.5 V supply while generating ±5 V RS-232 levels makes it ideal for embedded, industrial, and portable systems. The device provides fast data rates up to 250 kbps, low quiescent current, robust ESD protection, and compact 16-pin SOIC packaging. With full RS-232 compliance, low EMI, and minimal external component requirements, the SP232EET-L/TR is a versatile and reliable solution for high-speed serial communication in demanding applications.