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STMicroelectronics ST202CWR
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- Part No.:
- ST202CWR
- Manufacturer:
- STMicroelectronics
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST202CWR.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:135
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Product details
Overview
ST202CWR from STMicroelectronics is a 5 V powered, dual-transmitter/dual-receiver RS-232 interface IC compliant with EIA/TIA-232 and V.28 standards. It delivers ±9 V transmitter output swing, 400 kbps data rate, 0.1 µs receiver propagation delay, and operates from 0 to 70 °C using only four 0.1 µF external capacitors - ideal for low-power portable computers and battery-powered RS-232 networks.
For engineers reviewing the ST202CWR datasheet, ST202CWR pinout, ST202CWR application, or ST202CWR equivalent, key selection criteria include single-supply 5 V operation, ±30 V receiver input tolerance, 1.5 mA no-load supply current, and SO16L package compatibility with space-constrained industrial and embedded serial interfaces.
Technical Context
The ST202CWR integrates charge-pump voltage doublers and inverters to generate ±9 V RS-232 signaling levels from a single 5 V rail, eliminating need for ±12 V supplies. Its dual transceivers support independent full-duplex communication paths with TTL/CMOS logic-level interfacing on the digital side and robust ±30 V fault-tolerant inputs on the RS-232 side.
Receiver thresholds are hysteresis-based (0.2–1 V typical), ensuring noise immunity in electrically noisy environments; transmitter slew rate is controlled at 6–30 V/µs (typ. 12 V/µs) to limit EMI while maintaining signal integrity at 400 kbps over standard 3 kΩ loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5–5.5 V - enables direct connection to standard 5 V logic rails without regulation |
| Transmitter output swing | ±9 V (typ.) - meets RS-232 minimum ±5 V requirement with margin for cable loss |
| Data rate | 400 kbps (typ.) - supports high-speed serial links in modems and industrial controllers |
| Receiver input range | ±30 V - protects against line faults and ESD transients in unshielded environments |
| No-load supply current | 1.5 mA (typ.) - minimizes power draw in battery-operated portable systems |
| Operating temperature | 0 to 70 °C - qualified for commercial-grade embedded applications |
| Propagation delay (RX) | 0.1 µs (typ.) - ensures tight timing alignment in synchronous serial protocols |
Pinout & Package
The ST202CWR is supplied in a 16-pin SO16L (Small Outline, Narrow, 150 mil body width) package with gull-wing leads, optimized for automated assembly and PCB space efficiency in compact designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 C1+ | Charge pump capacitor positive terminal | Connects to + terminal of first 0.1 µF flying capacitor for voltage doubling |
| 2 V+ | Doubled voltage output | Provides +2×VCC (~10 V) to drive RS-232 transmitter outputs |
| 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 0.1 µF capacitor for voltage inversion |
| 5 C2− | Second charge pump capacitor negative terminal | Completes inversion loop; referenced to V+ during charge transfer |
| 6 V− | Inverted voltage output | Provides −VCC (~−5 V) to enable ±9 V RS-232 swing |
| 7 T2OUT | Second transmitter output | RS-232 level output (±9 V) for secondary full-duplex channel |
| 8 R2IN | Second receiver input | Accepts ±30 V RS-232 signals; converts to TTL/CMOS logic levels |
| 9 R2OUT | Second receiver output | TTL/CMOS logic-level output (0.2 V low / 3.5 V high) for microcontroller input |
| 10 T2IN | Second transmitter input | TTL/CMOS logic-level input driving second RS-232 transmitter |
| 11 T1IN | First transmitter input | TTL/CMOS logic-level input for primary RS-232 transmitter path |
| 12 R1OUT | First receiver output | TTL/CMOS logic-level output for primary microcontroller receive path |
| 13 R1IN | First receiver input | ±30 V tolerant RS-232 input for primary receive channel |
| 14 T1OUT | First transmitter output | Primary ±9 V RS-232 output for full-duplex communication |
| 15 GND | Analog/digital ground reference | Common return for all internal circuitry and external capacitors |
| 16 VCC | Positive supply input | Single 5 V supply powering all internal logic and charge pumps |
Key Features
| Feature | Design Value |
|---|---|
| Single 5 V supply operation | Eliminates need for ±12 V rails, reducing BOM count and board area in portable designs |
| Four 0.1 µF external capacitors | Minimizes component footprint and cost versus legacy RS-232 transceivers requiring larger electrolytics |
| ±30 V receiver input tolerance | Enables reliable operation in industrial settings with long cables and ground potential differences |
| 12 V/µs transmitter slew rate (typ.) | Balances EMI reduction with signal fidelity for stable 400 kbps transmission over 15 m cables |
| 0.1 µs receiver propagation delay (typ.) | Supports precise timing-critical protocols like UART-based sensor synchronization |
Applications
| Portable Computer Serial Interface | Low-Power Modem Design |
|---|---|
Use Scenario: Integrating RS-232 connectivity into ultra-thin laptops where space and battery life are constrained. IC Role / Device Role / Timing Role: Dual-channel transceiver translating between 5 V microcontroller UART and legacy RS-232 peripherals. Use Value: 1.5 mA quiescent current extends battery runtime; SO16L package fits narrow edge-mount layouts. | Use Scenario: Enabling bidirectional AT-command communication between embedded MCU and analog modem chipsets. IC Role / Device Role / Timing Role: Full-duplex RS-232 level shifter with matched TX/RX delays for reliable command-response handshaking. Use Value: 0.1 µs RX delay and 1.3 µs TX delay ensure deterministic UART frame timing at 400 kbps. |
| Industrial Sensor Interface Module | Battery-Powered Data Logger |
Use Scenario: Connecting ruggedized RS-232 sensors (e.g., pressure, temperature) to PLC I/O modules in factory environments. IC Role / Device Role / Timing Role: Fault-tolerant RS-232 receiver/transmitter isolating MCU from ±30 V line surges and ground loops. Use Value: ±30 V input rating prevents latch-up during cable hot-plug events; SO16L thermal resistance supports 70 °C ambient. | Use Scenario: Adding RS-232 debug and configuration port to solar-charged environmental monitoring nodes. IC Role / Device Role / Timing Role: Low-quiescent-power transceiver enabling intermittent serial access without draining primary Li-ion cells. Use Value: 1.5 mA no-load current reduces average power by >90% vs. legacy ±12 V solutions, extending field deployment to 12+ months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX202CPE+ | Same 5 V supply, ±9 V swing, but uses 5 external capacitors (0.1 µF ×4 + 1 µF); higher 3 mA supply current | Through-hole DIP-16 package only - unsuitable for SMT-only production | Select when legacy through-hole assembly or exact MAX202 pinout compatibility is required |
| SP3222EBCY-L | Lower 1 mA supply current, 250 kbps max data rate, ±15 V receiver tolerance, TSSOP-20 package | Higher integration (enable/disable control, shutdown mode) but slower timing and different pinout | Select when ultra-low power (<1 mA) and programmable shutdown are prioritized over 400 kbps speed |
Compared with MAX202CPE+ and SP3222EBCY-L, the ST202CWR offers optimal balance of speed (400 kbps), power (1.5 mA), and SO16L SMT compatibility - making it preferred for modern compact, high-throughput serial interfaces where pin-for-pin MAX202 replacement isn't mandatory.
Availability
ST202CWR is available at Aetrix Electronics and suitable for portable computer serial interfaces, low-power modem designs, and industrial sensor interface modules requiring stable component supply across extended production cycles.
Supply support for ST202CWR 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, analog ICs, power management devices, and sensors for automotive, industrial, and consumer markets.
The ST202 series belongs to ST's legacy RS-232 transceiver product line, engineered specifically for cost-sensitive, space-constrained commercial applications needing robust single-supply serial interface capability without external voltage rails.
FAQ
What is the maximum recommended trace length for ST202CWR-driven RS-232 lines at 400 kbps?
At 400 kbps, STMicroelectronics specifies reliable operation up to 15 meters with standard 3 kΩ termination and 1000 pF load capacitance. Longer traces require reduced data rate or active termination due to signal degradation from capacitance and impedance mismatch - verified via Figure 5 and Table 4 propagation delay measurements in the datasheet.
Can ST202CWR operate with ceramic capacitors smaller than 0.1 µF?
No - the charge pump circuit requires exactly 0.1 µF X7R or better ceramic capacitors per the datasheet (Section 4, Table 6). Using smaller values causes insufficient voltage doubling/inversion, resulting in <±5 V output swing and non-compliant RS-232 signaling, confirmed by electrical characteristics testing in Table 4.
Does ST202CWR support automatic power-down or sleep mode?
No - the ST202CWR has no enable/disable or shutdown pin and draws 1.5 mA continuously when VCC is applied. Power management must be implemented externally via VCC switching; unlike newer alternatives (e.g., SP3222), it lacks integrated low-power states.
Is the SO16L package of ST202CWR compatible with standard SO16 footprints?
No - SO16L has a narrower 0.150-inch body width (3.8–4.0 mm) versus standard SO16's 0.300-inch (7.6 mm) width. The lead pitch (1.27 mm) matches, but PCB land patterns must use SO16L-specific dimensions from Table 8 to avoid solder bridging or insufficient pad coverage.
ST202CWR 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:
- 400kbps
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
ST202CWR FAQ
1.How can I place an order for ST202CWR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST202CWR 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 ST202CWR reliable?
The price and inventory of ST202CWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST202CWR is usually 5 days.
3.What payment methods are accepted for ST202CWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST202CWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST202CWR?
ST202CWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST202CWR 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 ST202CWR?
For technical support, including ST202CWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST202CWR requirements.
6.How does Aetrix verify that ST202CWR is sourced from the original manufacturer or authorized distributors?
All ST202CWR 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 ST202CWR meets industry standards.
7.What is the process for return or replacement of ST202CWR?
All ST202CWR units undergo pre-shipment inspection (PSI). If there is an issue with ST202CWR, 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 ST202CWR part is unused and in its original packaging.
Return procedure for ST202CWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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