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STMicroelectronics ST202ECN
- Part No.:
- ST202ECN
- Manufacturer:
- STMicroelectronics
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
ST202ECN.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,669
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Product details
Overview
ST202ECN from STMicroelectronics is a dual-driver, 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. It interfaces between TTL/CMOS logic and RS-232 physical layer in industrial serial communication systems requiring robustness in harsh environments.
For engineers reviewing the ST202ECN datasheet, ST202ECN pinout, ST202ECN application, or ST202ECN equivalent, this device supports high-noise immunity serial links in embedded controllers, point-of-sale terminals, and industrial PLCs where compact 0.1 µF charge-pump capacitor count and SO16 packaging reduce board space and BOM cost.
Technical Context
The ST202ECN integrates two independent RS-232 drivers and receivers with internal charge-pump voltage converters generating ±VCC-derived rails (V+ and V−) using only four external 0.1 µF capacitors. Its receiver input resistance is 3–7 kΩ, with hysteresis of 0.2–1 V, enabling reliable detection of noisy RS-232 signals up to ±30 V.
Transmitter output swing is ±5 V to ±9 V into 3 kΩ loads, and logic-level inputs accept TTL/CMOS thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V). Propagation delays are 2 µs (transmitter) and 0.5–10 µs (receiver), supporting timing-critical full-duplex operation at 230 kbps over standard cable lengths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Protection | ±15 kV per human body model - ensures survivability during handling and field operation without external TVS diodes |
| Data Rate | 230 kbps guaranteed - supports high-speed legacy serial protocols like Modbus RTU and ASCII-based diagnostics |
| Slew Rate | 3–30 V/µs - configurable edge control to balance EMI reduction and signal integrity across cable types |
| Supply Voltage | 5 V ±10% - compatible with standard logic rails and eliminates need for auxiliary power supplies |
| Capacitor Requirement | Four 0.1 µF external capacitors - reduces PCB area and cost vs. 1 µF alternatives (e.g., ST232EC) |
| Operating Temperature | 0 to 70 °C - validated for commercial-grade industrial equipment and office automation systems |
| Receiver Input Range | ±30 V - tolerates large ground potential differences and induced transients in long-line installations |
Pinout & Package
ST202ECN is housed in a 16-pin Small Outline (SO16) package with 1.27 mm pitch, RoHS-compliant and ECOPACK® certified. The package measures 9.8 × 5.8 mm with 1.75 mm height and supports surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 C1+ | Charge pump capacitor positive terminal | Connects to +ve side of first 0.1 µF flying capacitor; critical for V+ generation |
| 2 V+ | Doubled supply voltage output | Provides +10 V rail for transmitter outputs; derived from VCC via internal charge pump |
| 3 C1− | Charge pump capacitor negative terminal | Completes first charge pump loop; ties to GND or VCC depending on topology |
| 4 C2+ | Second charge pump capacitor positive terminal | Connects to +ve side of second 0.1 µF capacitor; enables V− generation |
| 5 C2− | Second charge pump capacitor negative terminal | Completes second charge pump loop; referenced to V+ or GND |
| 6 V− | Inverted supply voltage output | Provides –10 V rail for RS-232 driver biasing; essential for true ±V swing |
| 7 T2OUT | Second transmitter output | RS-232 level output (±5–9 V); drives DTE/DCE TX line with controlled slew |
| 8 R2IN | Second receiver input | Accepts RS-232 input (±30 V range); includes ESD protection and hysteresis |
| 9 R2OUT | Second receiver output | TTL/CMOS logic-level output (0.4 V low / 3.5 V high); connects to UART RX |
| 10 T2IN | Second transmitter input | TTL/CMOS logic-level input (0.8 V low / 2 V high); accepts UART TX signal |
| 11 T1IN | First transmitter input | Primary TTL/CMOS input for full-duplex channel 1; electrically identical to T2IN |
| 12 R1OUT | First receiver output | Primary TTL/CMOS output for full-duplex channel 1; matches R2OUT specs |
| 13 R1IN | First receiver input | Primary RS-232 input with same ±30 V tolerance and ESD protection as R2IN |
| 14 T1OUT | First transmitter output | Primary RS-232 output; identical performance to T2OUT; supports bidirectional link |
| 15 GND | Analog/digital ground reference | Common return for all internal circuitry and external capacitors; must be low-impedance |
| 16 VCC | Positive supply input | 5 V ±10% main power; powers logic core, charge pumps, and receiver outputs |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation | Eliminates need for ±12 V supplies, reducing system complexity and power conversion losses |
| 0.1 µF capacitor support | Lowers total BOM cost and saves >70% PCB area compared to 1 µF solutions (e.g., ST232EC) |
| Integrated ESD protection | Removes requirement for external ±15 kV TVS diodes on RS-232 lines, simplifying layout |
| Controlled slew rate | Reduces radiated emissions by limiting dV/dt while maintaining signal fidelity over 15 m cables |
| Wide RS-232 input range | Enables interoperability with legacy equipment exhibiting ground offsets up to ±30 V |
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-floor cabinets. IC Role / Device Role / Timing Role: Translates 5 V UART signals to ±9 V RS-232 levels while rejecting ground-loop noise and ESD events from nearby motor drives. Use Value: Enables reliable 230 kbps Modbus RTU communication over 12 m shielded cable without external protection components. |
Use Scenario: Connecting receipt printer and barcode scanner to POS controller via separate RS-232 ports. IC Role / Device Role / Timing Role: Provides isolated, ESD-hardened full-duplex interface with independent driver/receiver channels for concurrent peripheral control. Use Value: Reduces bill-of-materials by eliminating discrete TVS diodes and simplifies certification for EN 61000-4-2 Level 4 compliance. |
| Medical Diagnostic Equipment | Building Automation Controller |
|
Use Scenario: Interfacing ultrasound machine control panel with external service laptop for firmware updates and calibration logs. IC Role / Device Role / Timing Role: Acts as isolated RS-232 bridge with precise 0.5–10 µs receiver propagation delay to maintain UART timing margins. Use Value: Guarantees error-free 115.2 kbps data transfer under hospital ESD conditions (e.g., static discharge from operator gloves). |
Use Scenario: Integrating HVAC controller with legacy BACnet MS/TP gateway using RS-232 physical layer. IC Role / Device Role / Timing Role: Converts microcontroller UART signals to robust RS-232 with ±30 V input tolerance for building wiring-induced transients. Use Value: Supports 230 kbps polling cycles across 200 m twisted-pair runs without signal degradation or false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX232CPE | Requires four 1 µF capacitors; no guaranteed 230 kbps rating; ±15 kV ESD not specified | Higher board area and BOM cost; lower data rate margin for high-speed diagnostics | Select when legacy footprint compatibility with DIP-16 is required and 230 kbps is not mandatory |
| SP3222ECA | 3.0–5.5 V supply range; 250 kbps rated; ±15 kV IEC 61000-4-2 contact discharge | Broad supply flexibility and enhanced ESD test coverage; different pinout and capacitor values | Prefer for new designs needing wider voltage range or stricter ESD compliance beyond HBM |
Compared with MAX232CPE and SP3222ECA, ST202ECN offers optimal trade-off of guaranteed 230 kbps performance, minimal 0.1 µF capacitor count, and HBM-specific ±15 kV robustness-making it ideal for cost-sensitive, space-constrained commercial industrial serial interfaces.
Availability
ST202ECN is available at Aetrix Electronics and suitable for industrial PLC serial interfaces, point-of-sale terminals, medical diagnostic equipment, and building automation controllers requiring stable component supply across multi-year production cycles.
Supply support for ST202ECN 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 automotive, industrial, and consumer markets.
The ST202ECN belongs to ST's legacy RS-232 transceiver product line, engineered specifically for robust, low-cost serial communication in commercial-grade industrial equipment with emphasis on ESD resilience and minimal external component count.
FAQ
What is the minimum and maximum supply voltage for ST202ECN?
The ST202ECN operates from a single 5 V supply with a specified range of 4.5 V to 5.5 V (±10%). Operation outside this range risks failure to generate valid ±VCC rails and may cause undefined logic behavior or permanent damage per absolute maximum ratings (VCC = –0.3 V to 6 V).
Can ST202ECN replace ST232EC in an existing design?
Yes, but only if the external capacitor values are changed from 1 µF to 0.1 µF and the temperature range requirement aligns (ST202ECN is 0–70 °C; ST232EC is –40–85 °C). Electrical performance is otherwise identical, including pinout, slew rate, and ESD rating.
Does ST202ECN support automatic power-down mode?
No. The ST202ECN has no enable/disable or shutdown pin and draws 5–10 mA quiescent current continuously when powered. Power management must be implemented externally via VCC switching or upstream regulator control.
What is the maximum cable length supported at 230 kbps?
At 230 kbps, ST202ECN supports up to 15 m of standard 24 AWG twisted-pair cable per EIA/TIA-232E loading conditions (3 kΩ termination, 1000 pF capacitance). Longer runs require reduced data rates or line drivers to maintain signal integrity.
ST202ECN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-DIP
ST202ECN FAQ
1.How can I place an order for ST202ECN through Aetrix?
Please submit a Request for Quotation (RFQ) for ST202ECN 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 ST202ECN reliable?
The price and inventory of ST202ECN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST202ECN is usually 5 days.
3.What payment methods are accepted for ST202ECN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST202ECN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST202ECN?
ST202ECN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST202ECN 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 ST202ECN?
For technical support, including ST202ECN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST202ECN requirements.
6.How does Aetrix verify that ST202ECN is sourced from the original manufacturer or authorized distributors?
All ST202ECN 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 ST202ECN meets industry standards.
7.What is the process for return or replacement of ST202ECN?
All ST202ECN units undergo pre-shipment inspection (PSI). If there is an issue with ST202ECN, 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 ST202ECN part is unused and in its original packaging.
Return procedure for ST202ECN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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