ST202CWR STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
ST202CWR is a 5 V multi-channel RS-232 line transceiver with 2 drivers and 2 receivers, Schmitt trigger inputs, EIA-232/TIA-232/V.28 compliance, and 0°C to 70°C operating range in a 16-pin SOIC package for serial communication interfaces.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- ST202CWR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.8027(MOQ 5000)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual RS-232 driver and receiver channels on a single 5 V supply without negative rail requirement
- Schmitt trigger receiver inputs providing 0.5 V hysteresis for noise immunity on long cable runs
- EIA-232, TIA-232, and V.28 compliant outputs ensuring interoperability with standard RS-232 equipment
- 16-pin SOIC package enabling straightforward PCB integration in space-constrained serial interface designs
- On-chip charge pump generating ±8 V RS-232 output levels from a single 5 V supply
Applications
ST202CWR provides the RS-232 physical layer interface between microcontrollers and serial peripherals such as GPS modules, industrial sensors, bar-code readers, and legacy PC COM ports. Its integrated charge pump generates the ±8 V RS-232 voltage levels directly from a 5 V supply, eliminating the need for a separate ±12 V power rail in embedded designs. The dual-channel architecture allows simultaneous full-duplex communication on two independent RS-232 ports using a single IC.
Specifications
| Date Of Intro | 1980-01-04 |
| YTEOL | 3 |
| Differential Output | NO |
| Driver Number of Bits | 2 |
| Input Characteristics | SCHMITT TRIGGER |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | EIA-232; TIA-232; V.28 |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Functions | 2 |
| Out Swing-Min | 10V |
| Output Low Current-Max | 0.0032A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Receive Delay-Max | 500ns |
| Receiver Number of Bits | 2 |
| Supply Current-Max | 4mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transmit Delay-Max | 3500ns |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for ST202CWR:
Frequently Asked Questions
How does ST202CWR generate RS-232 voltage levels from a single 5 V supply, and what external components are required?
ST202CWR uses an internal charge pump with four small external capacitors (typically 100 nF each) to boost the 5 V input to ±8 V for RS-232 driver outputs. This eliminates the need for a separate ±12 V power supply, reducing the BOM to just the IC and 4 capacitors. The charge pump capacitors are typically 0402 SMD components, keeping the total solution footprint under 50 mm² on a PCB.
What noise immunity does the Schmitt trigger input of ST202CWR provide on long RS-232 cable runs?
ST202CWR receiver inputs use Schmitt trigger thresholds with approximately 0.5 V hysteresis, compared to 0 V hysteresis for standard CMOS inputs. On a 15-meter RS-232 cable at 9600 baud, capacitive loading slows edge transitions and allows coupled noise to ride on the signal. The Schmitt trigger hysteresis prevents multiple false transitions per bit by requiring the signal to cross both the high and low thresholds before toggling the digital output, ensuring reliable communication at standard baud rates.
Can ST202CWR interface a 3.3 V microcontroller to an RS-232 device, and are logic level shifters needed?
ST202CWR operates from a 5 V supply and its receiver outputs are standard CMOS logic levels compatible with 5 V MCUs. For a 3.3 V microcontroller, the receiver output high voltage (typically 4.5 V) exceeds the 3.3 V MCU's absolute maximum input rating. A simple resistor divider or a dedicated 3.3 V-tolerant level shifter is required on the RX path. The driver inputs accept 3.3 V logic directly since the input threshold is typically below 1.5 V, so no level shifting is needed on the TX path.
How many serial ports can be realized with a single ST202CWR, and is it sufficient for a dual-port GPS and modem design?
ST202CWR integrates 2 independent RS-232 drivers and 2 receivers, enabling 2 full-duplex serial ports. For a design connecting a GPS module on Port 1 at 9600 baud and an AT-command modem on Port 2 at 115200 baud, a single ST202CWR handles both channels simultaneously without additional ICs. The 0°C to 70°C operating range covers standard commercial and industrial temperature conditions for both applications.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 5000+ | $0.8179 | $4089.40 |
| 7000+ | $0.8101 | $5670.91 |
| 10000+ | $0.8027 | $8026.70 |
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