MAX3221ECPWG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The MAX3221ECPWG4 is a single-channel RS-232 line driver and receiver from Texas Instruments, operating from 3 V to 5.5 V supply with integrated charge-pump capacitors in a 16-pin TSSOP package. It provides ±15 kV ESD protection, Schmitt trigger inputs, and is fully compliant with EIA-232-F standards for serial communication in embedded systems and industrial equipment.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- MAX3221ECPWG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MAX3221ECPWG4?
- 3 V to 5.5 V supply range operates directly from 3.3 V and 5 V logic rails
- Integrated charge-pump capacitors eliminate external RS-232 voltage generation components
- ±15 kV ESD protection on RS-232 I/O pins for robust field installations
- Schmitt trigger receiver inputs improve noise immunity on long cable runs
- EIA-232-F / TIA-232-F compliant single-channel driver and receiver in 16-pin TSSOP
What is MAX3221ECPWG4 used for?
The MAX3221ECPWG4 is used in embedded microcontroller systems, industrial HMI panels, and test equipment requiring a single-channel RS-232 serial port operating from a 3.3 V or 5 V supply. Its integrated charge pump simplifies board design by removing the need for external ±12 V rails, making it suitable for space-constrained designs in handheld instruments and UART-to-RS-232 adapter modules. It is also applied in legacy serial communication upgrades where 3 V logic controllers must interface with RS-232 peripherals across distances up to several metres.
What are the specifications of MAX3221ECPWG4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | ALSO OPERATES AT 5V SUPPLY |
| Differential Output | NO |
| Driver Number of Bits | 1 |
| High Level Input Current-Max | 0.000001A |
| Input Characteristics | SCHMITT TRIGGER |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | EIA-232-F; TIA-232-F; V.28 |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Out Swing-Min | 10V |
| Output Characteristics | 3-STATE |
| Output Low Current-Max | 0.0016A |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Receive Delay-Max | 150ns |
| Receiver Number of Bits | 1 |
| Supply Current-Max | 0.01mA |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 3.3V |
| Supply Voltage1-Max | 3.6V |
| Supply Voltage1-Min | 3V |
| Supply Voltage1-Nom | 3.3V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the MAX3221ECPWG4 datasheet?
MAX3221ECPWG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for MAX3221ECPWG4?
Compatible alternatives and drop-in replacements for MAX3221ECPWG4:
Frequently Asked Questions
What supply voltage does the MAX3221ECPWG4 accept, and how does it generate the RS-232 output levels internally?
The MAX3221ECPWG4 accepts a supply voltage of 3 V to 5.5 V and uses an integrated charge-pump circuit with small external capacitors to boost and invert the supply voltage, generating the ±5.4 V to ±7.5 V output swings required by RS-232 standards. This eliminates the need for a separate ±12 V rail, greatly simplifying power-supply design in 3.3 V embedded systems.
How does the ESD protection level of MAX3221ECPWG4 compare to standard logic-level devices in field-deployed equipment?
The MAX3221ECPWG4 provides ±15 kV ESD protection (Human Body Model) on its RS-232 transmit and receive pins, which is far beyond the ±2 kV typically found on standard logic devices. This robustness is critical for field-deployed serial ports where cables can accumulate static charges during handling, reducing the risk of port damage and improving long-term reliability in industrial installations.
For a 3.3 V microcontroller design needing RS-232 serial communication, what makes MAX3221ECPWG4 a suitable single-component solution?
The MAX3221ECPWG4 combines a 3 V to 5.5 V input supply, an internal charge-pump for RS-232 voltage generation, Schmitt trigger receiver inputs, and ±15 kV ESD protection in a single 16-pin TSSOP package. This integration means a 3.3 V MCU can connect directly to an RS-232 DE-9 port with just the IC and four small charge-pump capacitors of around 100 nF each, achieving full EIA-232-F compliance without any additional active components.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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