The ST3232ECD is a specialized integrated circuit (IC) manufactured by STMicroelectronics, designed to provide robust RS-232 interface communication solutions for electronic systems. This compact device addresses critical signal conversion and communication challenges in various electronic applications, offering seamless compatibility with standard serial communication protocols.
As a dual transmitter/receiver RS-232 interface IC, the ST3232ECD is engineered to convert TTL/CMOS logic levels to standard RS-232 voltage levels, enabling reliable data transmission between microcontrollers, computers, and peripheral devices. The device is packaged in a space-efficient Small Outline Package (SOP), making it ideal for compact electronic designs where board space is at a premium.
Key features of the ST3232ECD include its ability to handle multiple communication channels simultaneously, with built-in protection against electrostatic discharge and transient voltage spikes. This ensures robust performance in challenging electrical environments, making it suitable for industrial, automotive, telecommunications, and consumer electronics applications.
The IC supports standard RS-232 voltage swing levels, typically ±5V to ±15V, effectively bridging the gap between low-voltage logic circuits and traditional serial communication standards. Its low power consumption and wide operating temperature range further enhance its versatility across different electronic systems.
Primary advantages include its high noise immunity, low electromagnetic interference, and compatibility with a wide range of microcontroller and communication interface designs. The device is particularly valuable in embedded systems, communication equipment, and legacy interface applications where reliable serial communication is critical.
While the ST3232ECD is a specialized component, potential equivalent or alternative models include the MAX232, SP232, and other similar dual RS-232 transceiver ICs from manufacturers like Maxim Integrated and Texas Instruments. These alternative models offer comparable functionality, though specific electrical characteristics may vary.
The extensive quantity of 2,655 units suggests this is likely a bulk procurement for manufacturing or large-scale electronic design projects, indicating its reliability and widespread industrial application in communication interface design.
ST3232ECD Key Technical Attributes
Manufacturer STMicroelectronics
Manufacturer Part Number ST3232ECD
Main Category Integrated Circuits Specialized ICs
ST3232ECD Packing Size
Package type SOP SOIC 16 leads narrow body
Mold material epoxy molding compound halogen free RoHS compliant
Leadframe material copper alloy with matte tin plating lead free
Body size approximately 10.3 mm length x 3.9 mm width x 1.75 mm height typical for SOIC 16
Pin pitch 1.27 mm with 16 pins
Pin configuration VCC GND C1+ C1− C2+ C2− V+ V− T1IN T1OUT T2IN T2OUT R1IN R1OUT R2IN R2OUT
Thermal characteristics typical θJA 100 to 130 °C W on standard FR 4 board typical θJC around 40 °C W
Electrical properties 3.0 to 5.5 V supply integrated charge pump generates true RS 232 voltages two drivers two receivers ESD robustness on RS 232 pins
ST3232ECD Application
RS 232 level conversion between microcontroller UARTs and legacy serial ports
Industrial handhelds POS terminals printers modems routers and embedded systems
PC interface via DB9 connectors instrumentation data loggers and field service tools
ST3232ECD Features
The ST3232ECD is a low power dual driver dual receiver RS 232 transceiver that operates from a single 3.0 to 5.5 V supply and uses an internal charge pump with four small external capacitors to generate compliant RS 232 voltage levels. It meets EIA TIA 232 E specifications, supports robust communications up to approximately 250 kbps, and provides TTL CMOS compatible logic interfaces on the system side for seamless connection to 3 V or 5 V MCU UARTs. The device implements automatic driver slew rate control for reduced EMI while maintaining signal integrity over typical cable lengths, and it is designed to drive a 3 kΩ load in parallel with up to 1000 pF on the RS 232 outputs without loss of compliance. Enhanced ESD protection, commonly ±15 kV HBM on the RS 232 pins, safeguards against electrostatic events during hot plugging and field use. The receivers feature guaranteed thresholds and hysteresis for noise immunity, and the transceiver presents true fail safe behavior on R inputs to prevent false detection when the input is floating. The pinout is fully compatible with the industry standard footprint, enabling drop in replacement for common RS 232 transceivers in SOIC 16. Low quiescent current and efficient charge pump architecture minimize power draw in battery powered and portable applications, and the wide operating temperature range typically supports industrial environments. The solution requires only four external 0.1 µF capacitors for the charge pump, simplifying design and reducing board area while maintaining reliable performance across voltage and temperature. The package and lead finish are lead free and RoHS compliant, supporting modern manufacturing and environmental requirements.
ST3232ECD Quality and Safety Features
Robust electrostatic discharge protection on RS 232 interface pins helps prevent damage during handling and cable connection. Receiver input hysteresis and defined logic thresholds improve noise immunity and reduce the risk of communication errors in electrically noisy environments. Built in slew rate control reduces radiated emissions and crosstalk, supporting EMC compliance in end equipment. The device adheres to EIA TIA 232 electrical level requirements, ensuring interoperable and predictable signaling with legacy serial equipment. Materials and finishes are lead free and RoHS compliant, and the SOP package provides reliable solderability and mechanical stability across a wide temperature range.
ST3232ECD Compatibility
Pin compatible and functionally interchangeable with popular 3 V to 5.5 V RS 232 transceivers such as MAX3232 TI TRS3232E and NXP SP3232E families. Logic side interfaces are TTL CMOS compatible, allowing direct connection to common MCU UART pins found on STMicroelectronics STM32 Microchip PIC Atmel AVR NXP LPC and similar platforms. The RS 232 side is compliant with standard DTE DCE equipment via DB9 connectors and typical cable assemblies, making it suitable for retrofit and maintenance of legacy serial links.
ST3232ECD Datasheet PDF
Our website hosts the most authoritative and up to date datasheet for the ST3232ECD. For accurate specifications pin descriptions absolute maximum ratings typical performance curves and application guidance, we strongly recommend downloading the datasheet from this current product page so you can design with confidence.
Quality Distributor
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