STMicroelectronics

ST202ECD

ST202ECD Description

The ST202ECD from STMicroelectronics is a full-duplex RS-232 transceiver designed for robust serial communication in industrial and embedded systems. Housed in a 16-pin SO package, this surface-mount IC supports data rates up to 230kbps and operates within a 4.5V to 5.5V supply range, making it suitable for low-power applications. With two drivers and two receivers, it ensures reliable bidirectional data transmission while adhering to RS-232 protocol standards. The device is RoHS3 compliant and REACH unaffected, meeting stringent environmental regulations. Although marked as obsolete, it remains a viable choice for legacy systems requiring stable performance in 0°C to 70°C environments.

ST202ECD Features

• Full-duplex operation: Enables simultaneous transmission and reception for efficient data exchange.
• 500mV receiver hysteresis: Enhances noise immunity in electrically noisy environments.
• Wide supply voltage range (4.5V–5.5V): Compatible with standard 5V logic systems.
• Surface-mount (SO-16) packaging: Ideal for compact PCB designs.
• Low power consumption: Optimized for energy-sensitive applications.
• RS-232 compliance: Ensures interoperability with legacy serial interfaces.
• Moisture Sensitivity Level (MSL) 1: Suitable for extended storage without dry packing.

ST202ECD Applications

The ST202ECD excels in scenarios demanding reliable serial communication with moderate data rates, such as:

• Industrial automation: PLCs, motor controllers, and sensor interfaces.
• Embedded systems: Legacy equipment upgrades or maintenance.
• Point-of-sale (POS) terminals: Secure transaction processing.
• Telecommunication infrastructure: Modems and network monitoring devices.
• Medical instrumentation: Data logging and diagnostic tools.

Conclusion of ST202ECD

While the ST202ECD is obsolete, its robust design, noise-resistant performance, and compliance with industry standards make it a dependable choice for maintaining or upgrading existing RS-232 systems. Engineers seeking a proven transceiver for moderate-speed serial communication will find its full-duplex capability and wide operating temperature range particularly advantageous. For new designs, consider evaluating newer alternatives from STMicroelectronics' portfolio.