STMicroelectronics ST202EBD

Overview

ST202EB from STMicroelectronics is a dual-driver/dual-receiver RS-232 transceiver IC designed for robust serial communication in industrial and embedded systems. It operates from a single 5 V supply, delivers ±15 kV ESD protection on RS-232 I/O pins, guarantees 230 kbps data rate, and features a programmable slew rate (3–30 V/µs) to reduce EMI in noisy environments.

For engineers reviewing the ST202EB datasheet, ST202EB pinout, ST202EB application, or ST202EB equivalent, this device is selected for cost-sensitive, space-constrained RS-232 interfaces requiring high ESD immunity, wide temperature operation (–40 to +85 °C), and compatibility with 0.1 µF charge-pump capacitors.

Technical Context

The ST202EB implements a charge-pump voltage converter to generate ±V_CC-derived RS-232 output levels from a single 5 V rail. Its transmitter outputs swing ±5 V to ±9 V into 3 kΩ loads, while receivers accept ±30 V input ranges and provide TTL/CMOS-compatible outputs with 0.4 V low-level and ≥3.5 V high-level drive.

It uses external 0.1 µF capacitors for charge-pump operation-reducing board area and BOM cost versus 1 µF alternatives-and supports full-duplex communication with independent driver/receiver channels, each with defined logic thresholds (e.g., RIN hysteresis 0.2–1 V) for noise margin in electrically harsh settings.

Key Specifications

Pinout & Package

ST202EB is available in SO16 and TSSOP16 packages, both RoHS-compliant and ECOPACK®-certified. The SO16 variant measures 10.0 × 6.0 mm with 1.27 mm pitch; TSSOP16 is 5.0 × 6.4 mm with 0.65 mm pitch for high-density layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RS-232 transceiver applications.

Compared with MAX3232ESE+ and SP3232EEN-L, ST202EB offers identical capacitor count and ESD rating but lacks shutdown mode and 3.3 V support-making it optimal for fixed 5 V, cost-sensitive industrial designs where simplicity and proven reliability outweigh feature expansion.

Availability

ST202EB is available at Aetrix Electronics and suitable for industrial automation, point-of-sale terminals, and medical diagnostic equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for ST202EB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, analog ICs, power management, and sensor solutions for industrial, automotive, and consumer markets.

The ST202EB belongs to ST's RS-232 transceiver product line, engineered for rugged serial communication in electrically noisy, temperature-variable environments where reliability and ESD resilience are non-negotiable.

FAQ

What is the minimum and maximum supply voltage for ST202EB?

The ST202EB operates with a supply voltage range of 4.5 V to 5.5 V (5 V ±10%). Absolute maximum ratings allow V_CC up to 6 V, but sustained operation outside the specified range may degrade ESD performance or cause latch-up. Operation below 4.5 V risks failure to meet 230 kbps data rate and ±5 V output swing specifications.

Can ST202EB replace ST232EB in an existing design?

Yes, ST202EB can replace ST232EB if the design uses 0.1 µF charge-pump capacitors and does not require the ST232EB's higher 1 µF capacitor option. Pinout and electrical behavior are identical; only capacitor value differs. No layout changes are needed, but verify that 0.1 µF caps meet local EMI and noise requirements.

Does ST202EB support automatic direction control or half-duplex operation?

No, ST202EB is a fixed full-duplex transceiver with independent transmitter and receiver channels. It lacks auto-direction control, DE/RE pins, or half-duplex configuration logic. For RS-485 or bus-oriented half-duplex use, a separate transceiver such as ST485B must be selected.

What thermal derating applies to ST202EB in a 2-layer PCB?

In a 2-layer PCB, the SO16 package has a junction-to-ambient thermal resistance (R_thJA) of 115 °C/W. At 5 mA supply current and 100 mW internal dissipation, junction temperature rise is ~11.5 °C above ambient-well within the –40 to +85 °C operating limit. No thermal pad or copper pour is required for standard operation.