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STMicroelectronics ST232EBDR
- Part No.:
- ST232EBDR
- Manufacturer:
- STMicroelectronics
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST232EBDR.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:33,258
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Product details
Overview
ST232EBDR from STMicroelectronics is a ±15 kV ESD-protected, 5 V single-supply RS-232 transceiver with two drivers and two receivers. It delivers guaranteed 230 kbps data rate, 3–30 V/µs slew rate control, and operates across –40 to +85 °C. Used in industrial serial interfaces where robustness against electrostatic discharge and reliable point-to-point communication are required.
For engineers reviewing the ST232EBDR datasheet, ST232EBDR pinout, ST232EBDR application, or ST232EBDR equivalent, this page provides verified electrical specifications, SO16 package details, ESD protection performance, transmitter/receiver timing behavior, and real-world deployment context for RS-232 physical layer design.
Technical Context
The ST232EBDR implements charge-pump voltage conversion to generate ±10 V RS-232 signal levels from a single 5 V supply, using four external 1 µF capacitors. Its dual-driver/dual-receiver architecture supports full-duplex asynchronous serial communication compliant with EIA/TIA-232E and CCITT V.28 standards.
Transmitter outputs meet ±5 V to ±9 V swing under 3 kΩ load, with input logic thresholds at 0.8 V (low) and 2.0 V (high); receiver inputs tolerate ±30 V common-mode range and feature 0.2–1 V hysteresis to reject noise-induced false transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 5 V ±10% - enables direct integration with 5 V logic systems without auxiliary rails |
| Data Rate | 230 kbps guaranteed - supports high-speed legacy serial links such as industrial PLCs and point-of-sale terminals |
| Slew Rate | 3–30 V/µs - adjustable edge control reduces EMI and allows tuning for cable length and noise immunity |
| ESD Protection | ±15 kV HBM on RS-232 I/O pins - eliminates need for external TVS diodes in harsh environments |
| Operating Temp | –40 to +85 °C - qualified for extended industrial temperature operation without derating |
| Capacitor Requirement | Four 1 µF external capacitors - simplifies BOM and reduces board area vs. 0.1 µF alternatives |
| Supply Current | 5 mA typical at 25 °C - low quiescent power supports always-on serial monitoring applications |
Pinout & Package
ST232EBDR is supplied in a 16-pin Small Outline Integrated Circuit (SO16) package, RoHS-compliant and ECOPACK® certified, with 1.27 mm pitch and surface-mount footprint optimized for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 C1+ | Charge pump capacitor positive terminal | Connects to first flying capacitor; sets positive voltage doubler stage |
| 2 V+ | Doubled output voltage node | Provides +10 V rail for RS-232 driver outputs |
| 3 C1− | Charge pump capacitor negative terminal | Completes first capacitor loop; referenced to GND during charge phase |
| 4 C2+ | Second charge pump capacitor positive terminal | Feeds inverted voltage generator stage |
| 5 C2− | Second charge pump capacitor negative terminal | Completes second capacitor loop; referenced to V+ during inversion |
| 6 V− | Inverted output voltage node | Provides –10 V rail for RS-232 driver outputs |
| 7 T2OUT | Second transmitter output | RS-232 level output (±5 to ±9 V), compatible with standard DB9 receivers |
| 8 R2IN | Second receiver input | Accepts ±30 V RS-232 signals; converts to TTL/CMOS logic levels |
| 9 R2OUT | Second receiver output | TTL/CMOS-compatible output (0.4 V low / 3.5 V high @ load) |
| 10 T2IN | Second transmitter input | Accepts 0.8 V / 2.0 V logic thresholds; drives RS-232 line on assertion |
| 11 T1IN | First transmitter input | Primary TTL/CMOS input for full-duplex channel A |
| 12 R1OUT | First receiver output | Primary TTL/CMOS output for full-duplex channel A |
| 13 R1IN | First receiver input | Primary RS-232 input with 3–7 kΩ input resistance and 0.5 V hysteresis |
| 14 T1OUT | First transmitter output | Main RS-232 driver output; meets EIA/TIA-232E loading requirements |
| 15 GND | Analog and digital ground reference | Common return path for all internal circuitry and external capacitors |
| 16 VCC | Positive supply input | 5 V ±10% main power rail; powers internal logic and charge pump controller |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge-pump voltage converter | Generates ±10 V RS-232 levels from single 5 V supply-eliminates dual-rail requirement |
| Guaranteed 230 kbps data rate | Ensures interoperability with legacy industrial modems and UART peripherals without timing margin loss |
| ±15 kV HBM ESD protection | Protects I/O pins against handling and system-level ESD events-no external clamping needed |
| 3–30 V/µs slew rate control | Reduces radiated emissions on long cables while maintaining signal integrity over 15 m runs |
| –40 to +85 °C operating range | Validated performance across full industrial temperature range-no thermal derating required |
Applications
| Industrial PLC Serial Interface | Point-of-Sale Terminal Communication |
|---|---|
Use Scenario: Bidirectional RS-232 link between PLC CPU module and remote I/O expansion unit in factory automation cabinets. IC Role / Device Role / Timing Role: Physical layer transceiver converting TTL UART signals to EIA-232 voltage levels with ESD-hardened I/O. Use Value: ±15 kV HBM rating prevents field failures due to operator contact discharge during cabinet maintenance. | Use Scenario: Connection between POS terminal motherboard and receipt printer via DB9 cable in retail environments. IC Role / Device Role / Timing Role: Full-duplex RS-232 interface IC providing 230 kbps throughput and 0.5 µs receiver propagation delay. Use Value: Guaranteed slew rate range ensures clean signal edges on 2 m unshielded cables, minimizing bit errors. |
| Medical Diagnostic Equipment Port | Legacy Test Instrument Control |
Use Scenario: Isolated serial port on ultrasound machine front panel used for service diagnostics and firmware updates. IC Role / Device Role / Timing Role: RS-232 transceiver with ±30 V input tolerance and 3 kΩ receiver input impedance. Use Value: Wide common-mode input range rejects ground-loop noise from adjacent AC-powered subsystems. | Use Scenario: GPIB-to-RS-232 bridge module controlling benchtop oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Dual-channel transceiver enabling simultaneous command/response traffic over one DB9 connector. Use Value: Two independent drivers/receivers allow concurrent SCPI command transmission and status polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3232CDR | Uses 0.1 µF capacitors; lower supply current (1 µA shutdown mode); same 230 kbps rate and ±15 kV ESD | Preferred in battery-powered portable instruments due to ultra-low standby power | Select when board space permits smaller caps and power budget demands sub-mA idle draw |
| SP3232EEN-L | Supports 3 V to 5.5 V supply; 1 µF cap requirement matches ST232EBDR; slightly higher max supply current (15 mA) | Better suited for mixed-voltage systems where 3.3 V logic coexists with RS-232 peripherals | Select when interfacing with 3.3 V microcontrollers without level shifters |
Compared with MAX3232CDR and SP3232EEN-L, ST232EBDR offers identical ESD robustness and data rate but requires larger 1 µF capacitors-favoring cost-sensitive industrial designs where capacitor size is less constrained than power consumption.
Availability
ST232EBDR is available at Aetrix Electronics and suitable for industrial PLC serial interfaces, point-of-sale terminal communication, and medical diagnostic equipment ports requiring stable component supply and long-term lifecycle support.
Supply support for ST232EBDR 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The ST232EBDR belongs to ST's RS-232 transceiver product line, engineered specifically for ruggedized serial communication in electrically noisy industrial environments with guaranteed ESD resilience and wide temperature operation.
FAQ
What is the minimum and maximum supply voltage for ST232EBDR?
The ST232EBDR operates with a supply voltage range of 4.5 V to 5.5 V (5 V ±10%). Absolute maximum rating extends to 6 V, but sustained operation above 5.5 V risks reliability degradation and is not characterized per datasheet specifications.
Can ST232EBDR be used with 0.1 µF external capacitors?
No-ST232EBDR is specifically designed for use with four 1 µF capacitors. The ST202EBDR variant uses 0.1 µF capacitors; substituting smaller values with ST232EBDR causes insufficient charge pump regulation, leading to reduced output voltage swing and potential communication failure.
Does ST232EBDR support automatic power-down or shutdown mode?
No-ST232EBDR has no enable/shutdown pin or internal power-down state. It draws continuous supply current (5–10 mA typical) whenever VCC is applied. For low-power applications, consider MAX3232CDR which includes a 1 µA shutdown mode.
Is ST232EBDR pin-compatible with ST202EBDR?
Yes-both share identical SO16 pinout and function mapping. However, they differ in capacitor requirements (1 µF vs. 0.1 µF) and internal charge pump optimization; mixing them without updating external components will result in noncompliant RS-232 voltage levels and possible interoperability issues.
ST232EBDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
ST232EBDR FAQ
1.How can I place an order for ST232EBDR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST232EBDR 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 ST232EBDR reliable?
The price and inventory of ST232EBDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST232EBDR is usually 5 days.
3.What payment methods are accepted for ST232EBDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST232EBDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST232EBDR?
ST232EBDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST232EBDR 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 ST232EBDR?
For technical support, including ST232EBDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST232EBDR requirements.
6.How does Aetrix verify that ST232EBDR is sourced from the original manufacturer or authorized distributors?
All ST232EBDR 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 ST232EBDR meets industry standards.
7.What is the process for return or replacement of ST232EBDR?
All ST232EBDR units undergo pre-shipment inspection (PSI). If there is an issue with ST232EBDR, 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 ST232EBDR part is unused and in its original packaging.
Return procedure for ST232EBDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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