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STMicroelectronics ST232EBWR
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- Part No.:
- ST232EBWR
- Manufacturer:
- STMicroelectronics
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST232EBWR.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,016
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Product details
Overview
ST232EBWR from STMicroelectronics is a dual-transmitter/dual-receiver RS-232 transceiver IC operating from a single 5 V supply, featuring ±15 kV HBM ESD protection on all RS-232 I/O pins, guaranteed 230 kbps data rate, and 3–30 V/µs slew rate control for noise-immune serial communication in industrial and embedded systems.
For engineers reviewing the ST232EBWR datasheet, ST232EBWR pinout, ST232EBWR application, or ST232EBWR equivalent, this device is selected for robust 5 V RS-232 interface design where ESD resilience, low external component count (four 1 µF charge-pump capacitors), and operation across –40 to +85 °C are critical.
Technical Context
The ST232EBWR integrates two independent RS-232 drivers and receivers with on-chip charge-pump voltage converters generating ±10 V rails from 5 V, enabling compliant RS-232 output swings of ±5 V to ±9 V under load. Its slew rate is internally limited to 3–30 V/µs to reduce EMI while maintaining signal integrity over long cables.
Receiver inputs tolerate ±30 V common-mode range and feature 0.2–1 V hysteresis for noise rejection; transmitter outputs drive 3 kΩ loads with 300 Ω typical output impedance and ±60 mA short-circuit current capability, supporting hot-swap and fault-tolerant system designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 5 V ±10% - enables direct integration into standard 5 V logic and microcontroller systems without auxiliary supplies |
| Data Rate | 230 kbps (guaranteed) - supports high-speed serial links such as modem control, point-of-sale terminals, and industrial PLC interfaces |
| ESD Protection | ±15 kV HBM on RS-232 I/O - eliminates need for external TVS diodes in harsh environments like factory floors or medical equipment |
| Slew Rate | 3–30 V/µs - configurable via external load/capacitance to balance EMI reduction and edge speed for cable lengths up to 15 m |
| Operating Temp | –40 to +85 °C - qualified for extended industrial temperature range, suitable for outdoor kiosks and automotive diagnostics tools |
| Capacitor Requirement | Four 1 µF charge-pump caps - reduces BOM cost and PCB area vs. 0.1 µF alternatives while maintaining full performance |
| Output Swing | ±5 V to ±9 V (3 kΩ load) - meets EIA/TIA-232E and ITU-T V.28 specifications for interoperability with legacy RS-232 peripherals |
Pinout & Package
The ST232EBWR is available in SO16 package (10.0 × 3.9 mm body, 1.27 mm pitch), RoHS-compliant and ECOPACK® certified, with thermal resistance RthJA = 115 °C/W (1-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 C1+ | Charge pump capacitor positive terminal | Connects to + terminal of first 1 µF flying capacitor; sets V+ rail generation path |
| 2 V+ | Doubled voltage output | Provides +10 V rail for driver outputs; must be decoupled to GND |
| 3 C1− | Charge pump capacitor negative terminal | Completes first charge-pump loop; ties to GND during phase switching |
| 4 C2+ | Second charge pump capacitor positive terminal | Connects to + terminal of second 1 µF flying capacitor; enables V− generation |
| 5 C2− | Second charge pump capacitor negative terminal | Completes second charge-pump loop; referenced to V+ during inversion |
| 6 V− | Inverted voltage output | Provides –10 V rail for driver outputs; requires local 1 µF bypass to GND |
| 7 T2OUT | Second transmitter output | RS-232 level output (±5 V to ±9 V); drives DB9 pin 3 or similar DTE/DCE line |
| 8 R2IN | Second receiver input | Accepts ±30 V RS-232 input; converts to TTL/CMOS logic levels at R2OUT |
| 9 R2OUT | Second receiver output | TTL/CMOS-compatible output (0.4 V low / 3.5 V high); connects to UART RX2 |
| 10 T2IN | Second transmitter input | TTL/CMOS input (0.8 V low / 2 V high threshold); accepts UART TX2 signal |
| 11 T1IN | First transmitter input | TTL/CMOS input for primary UART TX line; identical electrical thresholds to T2IN |
| 12 R1OUT | First receiver output | TTL/CMOS output for primary UART RX line; compatible with 5 V microcontrollers |
| 13 R1IN | First receiver input | RS-232 input pin with 3–7 kΩ input resistance; supports full ±30 V fault tolerance |
| 14 T1OUT | First transmitter output | Primary RS-232 output (e.g., DB9 pin 2); meets EIA/TIA-232E drive requirements |
| 15 GND | Ground reference | System ground return for all internal circuitry and charge-pump operation |
| 16 VCC | Positive supply input | 5 V power input; supplies internal logic, receivers, and charge-pump controller |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge-pump voltage converter | Generates ±10 V rails from 5 V supply using only four 1 µF capacitors-reducing external parts count by 60% vs. 0.1 µF solutions |
| ESD-hardened I/O structure | Withstands ±15 kV human-body-model ESD events on all RS-232 pins without latch-up or parameter shift-enabling unshielded cable connections in field-deployed equipment |
| Controlled slew-rate drivers | 3–30 V/µs transition rate minimizes radiated emissions while preserving signal fidelity over 15 m cables at 230 kbps |
| Wide common-mode receiver input range | ±30 V input tolerance allows reliable operation despite ground potential differences between interconnected devices in industrial settings |
| Industrial temperature qualification | Specified from –40 to +85 °C with full electrical performance-validated for use in programmable logic controllers and remote telemetry units |
Applications
| Industrial Serial Gateways | Medical Diagnostic Interfaces |
|---|---|
Use Scenario: Connecting legacy RS-232 medical instruments (e.g., ECG monitors, infusion pumps) to modern USB/Ethernet-enabled central stations via isolated serial bridges. IC Role / Device Role / Timing Role: Dual-channel RS-232 level shifter providing bidirectional data translation between 5 V UARTs and ±12 V RS-232 physical layer. Use Value: ±15 kV ESD protection prevents field failures during cable hot-plug in clinical environments; 230 kbps supports real-time waveform streaming without packet loss. | Use Scenario: Integrating barcode scanners and label printers into hospital asset-tracking systems using RS-232 ports on embedded Linux gateways. IC Role / Device Role / Timing Role: Robust physical-layer interface ensuring interoperability between diverse peripheral vendors' RS-232 implementations. Use Value: Guaranteed ±5 V to ±9 V output swing ensures compatibility with both older and newer RS-232 peripherals; SO16 package supports automated optical inspection (AOI) in high-volume assembly. |
| Ruggedized Point-of-Sale Terminals | Automotive Diagnostics Tools |
Use Scenario: Enabling RS-232 connectivity in outdoor kiosks exposed to temperature cycling, humidity, and electrostatic discharge from user interaction. IC Role / Device Role / Timing Role: Fault-tolerant transceiver handling simultaneous transmit/receive on two independent serial channels (e.g., printer + magnetic stripe reader). Use Value: –40 to +85 °C operation avoids thermal derating; 300 Ω transmitter output impedance matches standard RS-232 termination, minimizing reflections on 2 m ribbon cables. | Use Scenario: Building handheld OBD-II diagnostic adapters that connect vehicle ECUs (via RS-232-compatible K-line or ISO 9141) to Android tablets. IC Role / Device Role / Timing Role: Isolation-free but ESD-hardened interface bridging noisy automotive 12 V domains to clean 5 V mobile device logic. Use Value: ±30 V receiver input range tolerates battery transients and load-dump spikes; 1 µF capacitor footprint simplifies layout in space-constrained handheld enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3232ESE+ | Uses 0.1 µF capacitors; lower quiescent current (1 µA shutdown mode); ±15 kV ESD rating | Preferred in battery-powered portable devices due to ultra-low standby power | Select when power budget is constrained and external capacitors must be minimized in size-not when industrial temperature range or 1 µF cap compatibility is required |
| SP3232EEN-L | Guaranteed 250 kbps; 5 V operation; ±15 kV ESD; supports 1 µF caps but specifies tighter C1/C2 tolerance (±20%) | Better suited for high-noise factory automation where margin above 230 kbps improves timing margin | Choose when higher data-rate headroom and wider capacitor tolerance acceptance are needed-avoid if legacy 1 µF ceramic cap stock has ±10% tolerance only |
Compared with MAX3232ESE+ and SP3232EEN-L, the ST232EBWR offers optimal trade-off between industrial temperature support, proven 1 µF capacitor compatibility, and ESD resilience-making it preferred for fixed-installation equipment where reliability outweighs ultra-low-power needs.
Availability
ST232EBWR is available at Aetrix Electronics and suitable for industrial serial gateways, medical diagnostic interfaces, ruggedized point-of-sale terminals, and automotive diagnostics tools requiring stable component supply across extended temperature ranges and high ESD immunity.
Supply support for ST232EBWR 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, designing and manufacturing analog, mixed-signal, power, and microcontroller products for industrial, automotive, and consumer markets.
The ST232EBWR belongs to ST's RS-232 transceiver product line, engineered specifically for robust, low-component-count serial communication in harsh electromagnetic and thermal environments-targeting industrial automation, medical instrumentation, and transportation systems.
FAQ
What is the minimum and maximum supply voltage for reliable operation of the ST232EBWR?
The ST232EBWR operates reliably from 4.5 V to 5.5 V (5 V ±10%). Operation outside this range risks undefined behavior: below 4.5 V may cause insufficient charge-pump output voltage, leading to reduced RS-232 swing; above 5.5 V exceeds absolute maximum ratings and risks permanent damage to internal regulators and logic circuits.
Can the ST232EBWR replace the ST232ECWR in an existing design?
No-the ST232ECWR is obsolete and was specified for 0 to +70 °C operation, whereas the ST232EBWR is rated for –40 to +85 °C and uses different marking and tape-and-reel packaging. Electrical specs are identical, but thermal qualification and logistics documentation differ; redesign validation is required for temperature-critical applications.
Does the ST232EBWR require external pull-up or pull-down resistors on its TTL/CMOS I/O pins?
No-T1IN, T2IN, R1OUT, and R2OUT have built-in input thresholds and output drive strength compliant with standard TTL/CMOS logic families. External biasing is unnecessary unless specific noise immunity enhancements (e.g., weak pull-ups on unused TIN pins) are added per system-level EMC requirements.
How does the slew rate control work in the ST232EBWR, and can it be adjusted externally?
The slew rate is determined by internal driver architecture and external load conditions (RL = 3–7 kΩ, CL = 50–1000 pF). It is not user-adjustable via pins or registers, but varies naturally with capacitance and resistance on the TOUT lines-designers select RC values to achieve 3–30 V/µs within the guaranteed data rate window.
ST232EBWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Transceiver
- Protocol:
- RS232
- Number of Drivers/Receivers:
- 2/2
- Duplex:
- Full
- Receiver Hysteresis:
- 500 mV
- Data Rate:
- 230kbps
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
ST232EBWR FAQ
1.How can I place an order for ST232EBWR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST232EBWR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ST232EBWR reliable?
The price and inventory of ST232EBWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST232EBWR is usually 5 days.
3.What payment methods are accepted for ST232EBWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST232EBWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST232EBWR?
ST232EBWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST232EBWR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ST232EBWR?
For technical support, including ST232EBWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST232EBWR requirements.
6.How does Aetrix verify that ST232EBWR is sourced from the original manufacturer or authorized distributors?
All ST232EBWR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ST232EBWR meets industry standards.
7.What is the process for return or replacement of ST232EBWR?
All ST232EBWR units undergo pre-shipment inspection (PSI). If there is an issue with ST232EBWR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ST232EBWR part is unused and in its original packaging.
Return procedure for ST232EBWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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