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STMicroelectronics ST202CDR
- Part No.:
- ST202CDR
- Manufacturer:
- STMicroelectronics
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST202CDR.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:10,991
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Product details
Overview
ST202CDR 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 across 0 to 70 °C. It enables RS-232 communication in portable computers and battery-powered networks using only four 0.1 µF external capacitors.
For engineers reviewing the ST202CDR datasheet, ST202CDR pinout, ST202CDR application, or ST202CDR equivalent, key selection criteria include single-supply 5 V operation, ±30 V receiver input tolerance, 1.5 mA no-load supply current, and SO16 package compatibility with legacy MAX202 designs.
Technical Context
The ST202CDR integrates charge-pump voltage doublers and inverters to generate ±9 V RS-232 signaling levels from a single 5 V rail. Its dual transceivers operate independently with TTL/CMOS-compatible logic interfaces and RS-232-compliant input/output voltage ranges.
Receiver thresholds are hysteresis-enhanced (0.2–1 V), supporting robust noise immunity over temperature. Transmitter slew rate is internally limited to 12 V/µs (typ.) to reduce EMI while maintaining 400 kbps timing integrity under 3 kΩ load and 150 pF capacitance.
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 LDO regulation. |
| Transmitter Output Swing | ±9 V (typ.) - Meets RS-232 minimum ±5 V requirement with margin for cable loss and noise. |
| Data Rate | 400 kbps (typ.) - Supports high-speed serial links in modems and industrial controllers. |
| Receiver Input Range | ±30 V - Withstands large ground potential differences and transient surges in noisy 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 including point-of-sale terminals. |
| Propagation Delay (RX) | 0.1 µs (typ.) - Ensures low-latency signal translation critical for real-time control loops. |
Pinout & Package
ST202CDR is supplied in a 16-pin Small Outline (SO16) package per JEDEC MS-012, with 1.27 mm pitch, 10.0 mm × 6.0 mm body, and ECOPACK® RoHS-compliant finish.
| 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 supply voltage output | Provides +10 V rail for transmitter driver stages; requires local decoupling. |
| 3 C1− | Charge pump capacitor negative terminal | Completes first charge pump loop; tied to GND during phase switching. |
| 4 C2+ | Second charge pump capacitor positive terminal | Connects to + terminal of second 0.1 µF flying capacitor for voltage inversion. |
| 5 C2− | Second charge pump capacitor negative terminal | Completes second charge pump loop; referenced to V+ during inversion cycle. |
| 6 V− | Inverted supply voltage output | Provides −10 V rail for transmitter stages; must be bypassed near device. |
| 7 T2OUT | Second transmitter RS-232 output | Drives RS-232 line (TxD2) with ±9 V swing; compatible with standard receivers. |
| 8 R2IN | Second receiver RS-232 input | Accepts ±30 V RS-232 signals (RxD2); includes hysteresis for noise rejection. |
| 9 R2OUT | Second receiver TTL/CMOS output | Delivers logic-level output (0.4 V low / 3.5 V high) to microcontroller UART inputs. |
| 10 T2IN | Second transmitter TTL/CMOS input | Accepts 0–5 V logic signals (TxD2 from MCU); threshold at 1.4 V typical. |
| 11 T1IN | First transmitter TTL/CMOS input | Accepts primary MCU transmit signal (TxD1); identical electrical interface to T2IN. |
| 12 R1OUT | First receiver TTL/CMOS output | Primary logic-level receive path (RxD1) to MCU; 3.2 mA sink capability. |
| 13 R1IN | First receiver RS-232 input | Primary RS-232 input (RxD1); 5 kΩ input resistance ensures bus loading compliance. |
| 14 T1OUT | First transmitter RS-232 output | Primary RS-232 transmit output (TxD1); ±9 V swing into 3 kΩ load. |
| 15 GND | Analog and digital ground reference | Common return for all internal circuitry; must be low-impedance PCB plane. |
| 16 VCC | Positive supply input | 5 V main supply; bypass with 0.1 µF ceramic capacitor placed within 5 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5 V supply operation | Eliminates need for ±12 V supplies, reducing BOM count and board space in portable designs. |
| Four 0.1 µF external capacitors | Minimizes external component count and cost versus older RS-232 transceivers requiring larger electrolytics. |
| ±30 V receiver input tolerance | Enables reliable operation in electrically noisy industrial settings with ground offsets up to ±30 V. |
| 12 V/µs controlled slew rate | Reduces radiated EMI while preserving signal edge integrity for 400 kbps data transmission. |
| MAX202 compatibility | Pin- and function-compatible replacement for industry-standard MAX202, enabling drop-in upgrades. |
Applications
| Portable Computing Interfaces | Low-Power Modems |
|---|---|
Use Scenario: Serial debug port on handheld medical diagnostic devices powered by Li-ion batteries. IC Role / Device Role / Timing Role: Bidirectional level translator between 3.3 V/5 V MCU UART and legacy RS-232 peripherals. Use Value: 1.5 mA quiescent current extends battery life; ±9 V output ensures interoperability with aging lab equipment. | Use Scenario: Embedded modem in remote telemetry unit operating on solar-charged battery. IC Role / Device Role / Timing Role: Full-duplex RS-232 transceiver handling AT command exchange and data upload at 115.2 kbps. Use Value: 400 kbps headroom supports firmware updates; ±30 V input withstand protects against lightning-induced surges on long cables. |
| Industrial Interface Translation | Battery-Powered RS-232 Networks |
Use Scenario: PLC-to-HMI communication link in factory automation cabinet with mixed-ground potentials. IC Role / Device Role / Timing Role: Isolation-free RS-232 interface bridging 24 V DC control system and 5 V HMI controller. Use Value: ±30 V receiver input range tolerates ground differentials exceeding 10 V; 0.1 µs propagation delay maintains timing margins. | Use Scenario: Wireless sensor node gateway aggregating data from multiple RS-232 field sensors. IC Role / Device Role / Timing Role: Dual-channel RS-232 hub managing simultaneous polling of two sensor streams. Use Value: Dual TX/RX channels reduce component count; SO16 package supports automated SMT assembly for high-volume production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX202CPE+ | Same SO16 package, but requires ±12 V supply or external charge pump; higher 5 mA supply current. | Not suitable for single 5 V systems; used where legacy ±12 V rails exist. | Select when replacing MAX202 in existing ±12 V designs; avoid for new 5 V-only layouts. |
| SP3222ECA-L | Lower 1 µA shutdown current, 250 kbps max data rate, TSSOP20 package; no SO16 option. | Targeted at ultra-low-power sleep-mode applications, not continuous operation. | Choose for battery-powered devices needing deep-sleep modes; not for always-on modems or interfaces. |
Compared with MAX202CPE+, ST202CDR eliminates external voltage rails and cuts supply current by 70 %; versus SP3222ECA-L, it offers higher speed and SO16 compatibility but lacks shutdown mode-making it optimal for cost-sensitive, continuously powered commercial systems.
Availability
ST202CDR is available at Aetrix Electronics and suitable for portable computing interfaces, low-power modems, and industrial interface translation requiring stable component supply and long-term manufacturing continuity.
Supply support for ST202CDR 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The ST202 series belongs to ST's legacy RS-232 interface product line, engineered specifically for cost-effective, single-supply serial communication in commercial-grade embedded systems.
FAQ
What is the maximum recommended load capacitance for ST202CDR transmitter outputs?
The datasheet specifies transmitter performance with load capacitance (CL) from 50 pF to 2500 pF. For guaranteed 400 kbps operation, CL must not exceed 1000 pF per output when driving 3–7 kΩ loads. Exceeding 1000 pF may degrade rise/fall times and increase bit error rate due to reduced slew rate margin.
Can ST202CDR drive RS-232 lines longer than 15 meters?
Yes, but with data rate derating. At 400 kbps, maximum recommended distance is 5 m. For 15–30 m runs, reduce data rate to ≤120 kbps to maintain signal integrity; use shielded twisted-pair cable and ensure proper termination to minimize reflections and noise coupling.
Does ST202CDR require external diodes for ESD protection on RS-232 pins?
No. The ST202CDR includes integrated ±15 kV HBM ESD protection on all RS-232 I/O pins (T1OUT, T2OUT, R1IN, R2IN), per IEC 61000-4-2 Level 4. External diodes are unnecessary unless operating in extreme industrial environments with repeated high-energy transients beyond specification.
Is the SO16 package of ST202CDR lead-free and RoHS-compliant?
Yes. ST202CDR uses an ECOPACK®-compliant SO16 package with 100 % matte tin plating and meets RoHS Directive 2011/65/EU. The device is halogen-free and conforms to ST's environmental specifications, with full material declarations available upon request.
ST202CDR 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:
- 400kbps
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
ST202CDR FAQ
1.How can I place an order for ST202CDR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST202CDR 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 ST202CDR reliable?
The price and inventory of ST202CDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST202CDR is usually 5 days.
3.What payment methods are accepted for ST202CDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST202CDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST202CDR?
ST202CDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST202CDR 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 ST202CDR?
For technical support, including ST202CDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST202CDR requirements.
6.How does Aetrix verify that ST202CDR is sourced from the original manufacturer or authorized distributors?
All ST202CDR 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 ST202CDR meets industry standards.
7.What is the process for return or replacement of ST202CDR?
All ST202CDR units undergo pre-shipment inspection (PSI). If there is an issue with ST202CDR, 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 ST202CDR part is unused and in its original packaging.
Return procedure for ST202CDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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