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STMicroelectronics ST202ECD
- Part No.:
- ST202ECD
- Manufacturer:
- STMicroelectronics
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST202ECD.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,684
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Product details
Overview
ST202ECD 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 ST202ECD datasheet, ST202ECD pinout, ST202ECD application, or ST202ECD equivalent, this device supports robust point-to-point RS-232 links in temperature-sensitive environments (0 to 70 °C), with low-cost 0.1 µF charge-pump capacitors and TTL/CMOS logic compatibility.
Technical Context
The ST202ECD implements charge-pump voltage conversion to generate ±VCC-derived RS-232 output levels (±5 V min, ±9 V typ) without requiring ±12 V supplies. Its dual transmitter/receiver architecture enables full-duplex communication while maintaining independent input thresholds (VIL = 0.8 V, VIH = 2.0 V) and receiver hysteresis (0.2–1.0 V).
It meets EIA/TIA-232E and CCITT V.28 specifications across –40 to 85 °C for ST202EB variants, but ST202ECD is rated for 0 to 70 °C operation. Input resistance is 3–7 kΩ, output short-circuit current is ±10 to ±60 mA, and propagation delays are ≤2 µs (transmitter) and ≤10 µs (receiver) under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 5 V ±10% - enables direct connection to standard logic rails without auxiliary regulators |
| Data Rate | 230 kbps guaranteed - supports high-speed legacy serial interfaces up to ~230 kbaud |
| Slew Rate | 3–30 V/µs - adjustable edge control reduces EMI and improves signal integrity over long cables |
| ESD Protection | ±15 kV HBM - eliminates need for external TVS diodes on RS-232 I/O lines |
| Capacitor Requirement | Four 0.1 µF - minimizes board area and BOM cost versus 1 µF alternatives like ST232E |
| Operating Temperature | 0 to 70 °C - suitable for commercial and industrial control panels, not extended automotive or military |
Pinout & Package
ST202ECD is available in TSSOP16 package (3.0 × 4.4 mm, 0.65 mm pitch), optimized for space-constrained PCB layouts and automated assembly. Thermal resistance is RthJA = 95 °C/W (2-layer board) and RthJC = 25 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 C1+ | Charge pump capacitor positive terminal | Connects to +ve side of first 0.1 µF flying capacitor for voltage doubling |
| 2 V+ | Doubled supply voltage output | Provides +10 V rail for RS-232 driver outputs; requires local decoupling |
| 3 C1− | Charge pump capacitor negative terminal | Completes first charge pump stage; ties to GND during switching phase |
| 4 C2+ | Second charge pump capacitor positive terminal | Connects to +ve side of second 0.1 µF capacitor for voltage inversion |
| 5 C2− | Second charge pump capacitor negative terminal | Completes inverting charge pump stage; referenced to V+ during operation |
| 6 V− | Inverted supply voltage output | Provides –10 V rail for RS-232 driver outputs; must be decoupled |
| 7 T2OUT | Second transmitter output | RS-232 level output (±5 V min) for secondary full-duplex channel |
| 8 R2IN | Second receiver input | Accepts ±30 V RS-232 inputs with 3–7 kΩ input impedance |
| 9 R2OUT | Second receiver output | TTL/CMOS-compatible logic-level output (0.4 V low / 3.5 V high) |
| 10 T2IN | Second transmitter input | Accepts TTL/CMOS logic inputs (0.8 V low / 2.0 V high thresholds) |
| 11 T1IN | First transmitter input | Primary logic-level input for full-duplex RS-232 transmit path |
| 12 R1OUT | First receiver output | Primary TTL/CMOS logic output corresponding to R1IN signal |
| 13 R1IN | First receiver input | Primary RS-232 input with hysteresis (0.2–1.0 V) for noise rejection |
| 14 T1OUT | First transmitter output | Primary RS-232 output with controlled slew rate and ±15 kV ESD hardening |
| 15 GND | Analog/digital ground reference | Common return for all internal circuitry and external capacitors |
| 16 VCC | Positive supply input | 5 V ±10% main power rail; supplies internal logic and charge pump controller |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge-pump voltage converter | Eliminates need for ±12 V supplies; generates ±10 V rails from single 5 V source |
| 0.1 µF capacitor support | Reduces total solution size and cost vs. 1 µF-based alternatives (e.g., ST232E) |
| Receiver hysteresis | 0.2–1.0 V threshold window prevents chatter on noisy RS-232 lines |
| Low supply current | 5 mA typical at 25 °C - extends battery life in portable diagnostic tools |
| Full-duplex dual-channel interface | Enables simultaneous TX/RX on two independent RS-232 ports (e.g., modem + debug) |
Applications
| Industrial PLC Serial Port | Medical Diagnostic Equipment |
|---|---|
|
Use Scenario: Connecting programmable logic controllers to HMI terminals via RS-232 cabling in electrically noisy factory floors. IC Role / Device Role / Timing Role: Dual-channel RS-232 level translator providing isolated, ESD-hardened bidirectional communication between 5 V microcontroller UART and legacy serial peripherals. Use Value: ±15 kV ESD protection prevents field failures from operator handling; 230 kbps rate supports real-time I/O polling without bottlenecks. |
Use Scenario: Interfacing ultrasound or patient monitor modules to central data loggers using RS-232 in hospital environments. IC Role / Device Role / Timing Role: Full-duplex RS-232 transceiver enabling reliable command/response exchange between embedded ARM host and analog front-end subsystems. Use Value: 0.1 µF capacitor footprint saves PCB area in compact medical enclosures; 0–70 °C rating matches clinical ambient requirements. |
| Point-of-Sale Terminal | Test & Measurement Instrument |
|
Use Scenario: Integrating barcode scanners and receipt printers into retail POS systems using standardized RS-232 connections. IC Role / Device Role / Timing Role: RS-232 interface IC translating TTL UART signals from payment processor SoC to peripheral devices with ±30 V input tolerance. Use Value: Receiver input range (±30 V) accommodates cable-induced transients; low 5 mA supply current reduces thermal load in sealed enclosures. |
Use Scenario: Adding RS-232 configuration and firmware update capability to benchtop oscilloscopes and multimeters. IC Role / Device Role / Timing Role: Dual-transceiver enabling simultaneous remote control (T1) and status reporting (R2) over one physical port. Use Value: Slew rate control (3–30 V/µs) allows tuning for optimal signal fidelity on varying cable lengths up to 15 m. |
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 BOM cost and larger footprint; lower ESD immunity limits use in unshielded industrial settings | Select when legacy design reuse is prioritized over ESD robustness and space savings |
| SP3222EBCY-L | 3.0–5.5 V supply range; 250 kbps guaranteed; ±15 kV IEC 61000-4-2 contact discharge | Broad supply flexibility and superior ESD spec, but TSSOP20 package increases footprint vs. TSSOP16 | Select for multi-rail systems or where IEC-level ESD compliance is mandated |
Compared with MAX232CPE and SP3222EBCY-L, ST202ECD offers the smallest PCB footprint among 5 V-only RS-232 transceivers with guaranteed 230 kbps and ±15 kV HBM, making it optimal for cost- and space-sensitive commercial designs.
Availability
ST202ECD is available at Aetrix Electronics and suitable for industrial PLC serial ports, medical diagnostic equipment, and point-of-sale terminals requiring stable component supply, consistent TSSOP16 packaging, and long-term production continuity.
Supply support for ST202ECD 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 microcontrollers, power ICs, sensors, and analog/mixed-signal products for industrial, automotive, and consumer markets.
The ST202ECD belongs to ST's RS-232 interface product line, engineered specifically for robust, low-cost serial communication in commercial and industrial equipment where ESD resilience and minimal external components are critical.
FAQ
What is the minimum and maximum supply voltage for ST202ECD?
The ST202ECD operates from a single 5 V supply with a specified range of 4.5 V to 5.5 V (±10%). Absolute maximum VCC is 6 V; operation outside 4.5–5.5 V may cause undefined behavior or reduced ESD performance.
Can ST202ECD replace ST232ECD in an existing design?
No - ST202ECD uses four 0.1 µF charge-pump capacitors, while ST232ECD requires four 1 µF capacitors. Swapping them without changing capacitor values will cause voltage generation failure and loss of RS-232 output swing.
Does ST202ECD support automatic power-down mode?
No - ST202ECD has no enable or shutdown pin and draws continuous supply current (5–10 mA). Power management must be implemented externally via VCC switching or system-level sleep control.
What is the RS-232 receiver input voltage range for ST202ECD?
The receiver inputs tolerate –30 V to +30 V continuously, per Table 6 in the datasheet. This wide range protects against cable-induced transients and miswiring in field-deployed equipment.
ST202ECD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 16-SO
ST202ECD FAQ
1.How can I place an order for ST202ECD through Aetrix?
Please submit a Request for Quotation (RFQ) for ST202ECD 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 ST202ECD reliable?
The price and inventory of ST202ECD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST202ECD is usually 5 days.
3.What payment methods are accepted for ST202ECD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST202ECD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST202ECD?
ST202ECD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST202ECD 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 ST202ECD?
For technical support, including ST202ECD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST202ECD requirements.
6.How does Aetrix verify that ST202ECD is sourced from the original manufacturer or authorized distributors?
All ST202ECD 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 ST202ECD meets industry standards.
7.What is the process for return or replacement of ST202ECD?
All ST202ECD units undergo pre-shipment inspection (PSI). If there is an issue with ST202ECD, 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 ST202ECD part is unused and in its original packaging.
Return procedure for ST202ECD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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