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ST3222EBTR

ST3222EBTR

STMicroelectronics
2/2 Transceiver Full RS232 20-TSSOP
Active15,722 in stock
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Overview

The ST3222EBTR is a 3V to 5.5V powered RS-232 transceiver designed for high-speed serial communication at data rates up to 250kbps. It features two drivers and two receivers with integrated 15kV ESD protection, making it suitable for robust data exchange in harsh electrical environments. The device includes a low-power shutdown mode that reduces supply current to just 1uA, ideal for battery-operated portable systems.

Why Choose This Part

This transceiver offers high ESD protection (15kV HBM) on RS-232 I/O pins, eliminating the need for external transient voltage suppressors in many designs. Its wide supply voltage range of 3V to 5.5V ensures compatibility with both legacy 5V logic and modern low-voltage microcontrollers. Additionally, the low 0.3mA typical supply current and 500mV receiver hysteresis provide a balance of power efficiency and signal noise immunity.

Applications

Portable Computing
Integration into notebooks and palmtop computers for legacy serial port connectivity.
Battery-Powered Instruments
Utilizing the 1uA shutdown mode to preserve battery life in handheld diagnostic equipment.
Industrial Peripherals
Interfacing printers and barcode scanners with industrial controllers over RS-232.
Embedded System Debugging
Providing a rugged serial interface for system monitoring and firmware uploads in the field.

Key Specifications

Type Transceiver
Duplex Full
Protocol RS232
Data Rate 250kbps
Mounting Type Surface Mount
Package / Case 20-TSSOP (0.173", 4.40mm Width)
Voltage - Supply 3V ~ 5.5V
Receiver Hysteresis 500 mV
Operating Temperature -40degC ~ 85degC
Supplier Device Package 20-TSSOP
Number of Drivers/Receivers 2/2

Getting Started

To implement the ST3222EBTR, connect four 0.1uF charge pump capacitors as specified in the datasheet to generate the necessary RS-232 voltage levels from a single supply. Ensure the SHDN pin is driven high for active operation or low to enter the ultra-low power state. For prototyping, this 20-TSSOP package can be used with standard TSSOP-to-DIP adapter boards on a breadboard.

Also Consider

MAX3222EEUP+ Analog Devices - Offers similar 2-driver/2-receiver functionality with enhanced 15kV ESD protection and identical pinout.
TRS3222EIDWR TITexas Instruments - A compatible RS-232 transceiver featuring high ESD protection and support for data rates up to 500kbps.