My Inquiry
My Account
STMicroelectronics ST202ECDR
- Part No.:
- ST202ECDR
- Manufacturer:
- STMicroelectronics
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST202ECDR.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:9,756
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ST202ECDR 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 for noise-immune serial communication in industrial control panels and legacy instrumentation interfaces.
For engineers reviewing the ST202ECDR datasheet, ST202ECDR pinout, ST202ECDR application, or ST202ECDR equivalent, this device delivers robust ESD-hardened RS-232 level translation with low-cost 0.1 µF charge-pump capacitors, TTL/CMOS logic compatibility, and operation across 0 to 70 °C ambient temperature - critical for embedded serial gateways and point-of-sale terminals requiring long-term reliability without external voltage converters.
Technical Context
The ST202ECDR implements charge-pump voltage generation (V+ and V−) using four external 0.1 µF capacitors to produce ±9 V RS-232 output swings from 5 V input, enabling full compliance with EIA/TIA-232E and CCITT V.28 standards. Its receiver input resistance is 3–7 kΩ with 0.2–1 V hysteresis, ensuring stable logic detection over ±30 V input range.
Transmitter outputs drive 3 kΩ loads with ±5 V minimum swing and 300 Ω typical output impedance; propagation delays are ≤2 µs (transmit) and ≤10 µs (receive) under standard load conditions. The device supports infinite short-circuit duration on transmitter outputs and operates up to 125 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 5 V ±10% - enables direct connection to standard logic rails without LDO or regulator |
| Data Rate | 230 kbps guaranteed - supports high-speed serial links in industrial PLC backplanes |
| Slew Rate | 3–30 V/µs - adjustable edge control reduces EMI in noisy factory environments |
| ESD Protection | ±15 kV HBM on RS-232 I/O - eliminates need for external TVS diodes in panel-mounted equipment |
| Operating Temp | 0 to 70 °C ambient - qualified for commercial-grade embedded systems with passive cooling |
| Capacitor Requirement | Four 0.1 µF - minimizes board area and BOM cost vs. 1 µF alternatives like ST232E |
Pinout & Package
ST202ECDR is supplied in a 16-pin TSSOP package (JEDEC MO-153), 4.9 × 6.4 mm footprint, 0.65 mm pitch, with exposed pad not electrically connected. Thermal resistance: RthJA = 95 °C/W (2-layer board), 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; sets V+ rail |
| 2 V+ | Doubled voltage output | Provides +9 V RS-232 driver bias; sourced from internal charge pump |
| 3 C1− | Charge pump capacitor negative terminal | Completes first charge pump loop; referenced to GND |
| 4 C2+ | Second charge pump capacitor positive terminal | Connects to +ve side of second 0.1 µF capacitor; sets V− rail |
| 5 C2− | Second charge pump capacitor negative terminal | Completes second charge pump loop; referenced to V+ |
| 6 V− | Inverted voltage output | Provides −9 V RS-232 driver bias; enables true bipolar signaling |
| 7 T2OUT | Second transmitter output | RS-232 level output (±5 V min) for secondary serial channel |
| 8 R2IN | Second receiver input | Accepts ±30 V RS-232 input; converts to TTL/CMOS logic levels |
| 9 R2OUT | Second receiver output | TTL/CMOS-compatible logic output (0.4 V low / 3.5 V high) |
| 10 T2IN | Second transmitter input | TTL/CMOS logic input driving second RS-232 transmitter |
| 11 T1IN | First transmitter input | TTL/CMOS logic input driving primary RS-232 transmitter |
| 12 R1OUT | First receiver output | TTL/CMOS logic output for primary serial receive path |
| 13 R1IN | First receiver input | RS-232 input port with 3–7 kΩ input resistance and hysteresis |
| 14 T1OUT | First transmitter output | Primary RS-232 output with ±5 V min swing into 3 kΩ load |
| 15 GND | Ground reference | Common return for logic, charge pump, and RS-232 signal paths |
| 16 VCC | Positive supply input | 5 V ±10% main power input; supplies internal logic and charge pump |
Key Features
| Feature | Design Value |
|---|---|
| ESD-hardened I/O | ±15 kV HBM protection on all RS-232 pins eliminates external ESD components in field-deployed devices |
| Low-capacitance operation | Supports 0.1 µF charge-pump capacitors - reduces PCB area by >80% vs. 1 µF solutions |
| Wide input voltage tolerance | Receiver accepts ±30 V inputs - tolerates cable-induced transients and ground offset in multi-drop networks |
| Logic-level compatibility | Direct TTL/CMOS interfacing with 0.4 V low / 3.5 V high outputs - no level-shifting circuitry required |
| Thermal robustness | Rated for 125 °C junction temperature - supports operation in sealed enclosures without forced airflow |
Applications
| Industrial PLC Serial Interface | Point-of-Sale Terminal Backchannel |
|---|---|
|
Use Scenario: Bidirectional RS-232 communication between PLC CPU module and legacy HMI or barcode scanner. IC Role / Device Role / Timing Role: Dual-channel level translator converting 5 V logic to ±9 V RS-232 signals with ESD immunity at connector interface. Use Value: Enables reliable operation in electrically noisy factory floors where ±15 kV ESD events occur during operator interaction or cable handling. |
Use Scenario: Connecting receipt printer and magnetic stripe reader to POS controller via separate RS-232 ports. IC Role / Device Role / Timing Role: Two independent transceivers providing simultaneous transmit/receive paths without shared timing constraints. Use Value: Guarantees 230 kbps throughput per channel - sufficient for fast receipt printing and real-time card swipe verification. |
| Medical Diagnostic Equipment Port | Ruggedized Data Logger Interface |
|
Use Scenario: Isolating RS-232 diagnostic port on ultrasound or ECG units from internal 5 V logic subsystems. IC Role / Device Role / Timing Role: ESD-protected signal bridge maintaining signal integrity while preventing patient-connected circuits from injecting noise. Use Value: Complies with IEC 60601-1 creepage/clearance requirements when paired with reinforced isolation barriers. |
Use Scenario: Serial telemetry link between environmental sensor array and central logger in outdoor utility cabinets. IC Role / Device Role / Timing Role: RS-232 transceiver operating across 0–70 °C ambient with 300 Ω driver output impedance for long-cable drive capability. Use Value: Slew rate control (3–30 V/µs) suppresses radiated emissions in unshielded twisted-pair cabling over 15 m runs. |
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 | Requires four 0.1 µF capacitors; ±15 kV HBM; 250 kbps max; 3.0–5.5 V supply range | Wider supply range allows direct use with 3.3 V systems; slightly higher data rate margin | Select when migrating from 5 V-only designs to mixed-voltage systems or requiring margin above 230 kbps |
| SP3232EEN-L | 0.1 µF capacitors; ±15 kV HBM; 250 kbps; 3.0–5.5 V; lower ISUPPLY (1 mA typ) | Lower quiescent current (1 mA vs. 5 mA) extends battery life in portable diagnostics | Prefer for battery-powered handheld instruments where standby power budget is constrained |
Compared with MAX3232CDR and SP3232EEN-L, ST202ECDR offers tighter thermal specifications (125 °C junction rating) and optimized 5 V-only operation, making it ideal for cost-sensitive, fixed-rail industrial controllers where supply stability and temperature resilience outweigh ultra-low power or multi-voltage flexibility.
Availability
ST202ECDR is available at Aetrix Electronics and suitable for industrial PLC serial interfaces, point-of-sale terminal backchannels, and ruggedized data logger interfaces requiring stable component supply across extended product lifecycles.
Supply support for ST202ECDR 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 ST202ECDR belongs to ST's RS-232 interface product line, engineered specifically for cost-effective, ESD-hardened serial communication in harsh industrial and commercial environments where reliability and long-term supply stability are mandatory.
FAQ
What is the minimum and maximum supply voltage for ST202ECDR?
The ST202ECDR operates with a nominal 5 V supply, specified over 4.5 V to 5.5 V (±10%). Absolute maximum VCC is 6 V; operation below 4.5 V may cause failure to meet 230 kbps data rate or ±5 V output swing guarantees. The device does not support 3.3 V operation - use MAX3232CDR or SP3232EEN-L for dual-voltage designs.
Can ST202ECDR be used with 1 µF charge-pump capacitors?
No - ST202ECDR is optimized for 0.1 µF external capacitors (C1–C4). Using 1 µF capacitors will cause excessive charge pump loading, leading to unstable V+ and V− rails, reduced output swing, and potential data corruption. The ST232E series (e.g., ST232ECDR) is the correct variant for 1 µF operation.
Does ST202ECDR include automatic power-down or shutdown mode?
No - ST202ECDR has no enable/shutdown pin or auto-power-down feature. It draws 5–10 mA continuously when powered, even with no data activity. For low-power applications, consider SP3232EEN-L (1 mA typical supply current) or MAX3232E (1 µA shutdown mode), both compatible with 0.1 µF capacitors.
Is ST202ECDR RoHS-compliant and lead-free?
Yes - ST202ECDR is manufactured in ST's ECOPACK®-compliant TSSOP16 package, meeting RoHS Directive 2011/65/EU and REACH SVHC requirements. The device carries the "ECOPACK2" marking per ST's environmental compliance documentation, with lead-free terminations and halogen-free molding compound.
ST202ECDR 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
ST202ECDR FAQ
1.How can I place an order for ST202ECDR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST202ECDR 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 ST202ECDR reliable?
The price and inventory of ST202ECDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST202ECDR is usually 5 days.
3.What payment methods are accepted for ST202ECDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST202ECDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST202ECDR?
ST202ECDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST202ECDR 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 ST202ECDR?
For technical support, including ST202ECDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST202ECDR requirements.
6.How does Aetrix verify that ST202ECDR is sourced from the original manufacturer or authorized distributors?
All ST202ECDR 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 ST202ECDR meets industry standards.
7.What is the process for return or replacement of ST202ECDR?
All ST202ECDR units undergo pre-shipment inspection (PSI). If there is an issue with ST202ECDR, 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 ST202ECDR part is unused and in its original packaging.
Return procedure for ST202ECDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ST202ECDR Tags
-
ATA6561-GAQW-N
Microchip Technology
-
ATA6561-GBQW-N
Microchip Technology
-
AM26LS32ACDR
Texas Instruments
-
SP485CN-L/TR
MaxLinear, Inc.
-
SP485EN-L/TR
MaxLinear, Inc.
-
SP485EEN-L/TR
MaxLinear, Inc.
-
SP485ECN-L/TR
MaxLinear, Inc.
-
THVD1400DR
Texas Instruments
-
AM26C31IDR
Texas Instruments
-
TLIN1021ADRQ1
Texas Instruments
-
MAX232IDR
Texas Instruments
-
AM26C32IDR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
