MAX3221ECPWRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The MAX3221ECPWRG4 is a single-channel RS-232 line transceiver from Texas Instruments operating from 3V to 5.5V, featuring one driver and one receiver in a 16-pin TSSOP package. It uses an internal charge pump with four small external capacitors to generate RS-232 voltage levels without a separate ±12V supply. Suitable for portable equipment, embedded UART ports, and industrial serial communication links conforming to EIA-232-F.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- MAX3221ECPWRG4 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 MAX3221ECPWRG4?
- 3V to 5.5V single-supply operation with internal charge pump generating RS-232 ±5V output levels from a single 3.3V rail
- 1 driver and 1 receiver in a 16-pin TSSOP meeting EIA-232-F and TIA-232-F standards for full RS-232 compliance
- Schmitt-trigger receiver inputs providing hysteresis to reject noise on long RS-232 cables in industrial environments
- Ultra-low 1 µA maximum high-level input current minimizing loading on 3.3V UART pins of low-power microcontrollers
- Auto-shutdown and wake-up receiver feature reducing quiescent power to under 1 µA when the RS-232 cable is idle
What is MAX3221ECPWRG4 used for?
The MAX3221ECPWRG4 is used to add an RS-232 serial port to battery-powered embedded systems, handheld instruments, and GPS modules where only a 3.3V supply is available and a separate bipolar RS-232 power rail is impractical. Its auto-shutdown feature extends battery life in portable data loggers by cutting supply current to under 1 µA when no RS-232 activity is detected on the cable. Industrial designers also use it in 3.3V PLCs and sensor gateways to communicate with legacy 5V RS-232 host computers without modifying the host interface.
What are the specifications of MAX3221ECPWRG4?
| Pbfree Code | No |
| YTEOL | 15 |
| 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 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 (Ni/Pd/Au) |
| 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 | 8542.39.00.90 |
| Country of Origin | Malaysia |
Where can I find the MAX3221ECPWRG4 datasheet?
MAX3221ECPWRG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for MAX3221ECPWRG4?
Compatible alternatives and drop-in replacements for MAX3221ECPWRG4:
Frequently Asked Questions
How does the MAX3221ECPWRG4 generate RS-232 voltage levels from a single 3.3V supply without a separate ±12V power source?
An internal charge pump uses four small external capacitors (typically 100 nF each) to boost the 3.3V input to approximately ±5.5V, which meets the EIA-232-F minimum ±3V output requirement across the full 3V to 5.5V supply range, eliminating the need for any external bipolar RS-232 power rails.
For a battery-powered data logger using the MAX3221ECPWRG4, how much current does the device draw when the RS-232 line is idle?
The auto-shutdown feature reduces total supply current to under 1 µA when the RS-232 receiver detects no valid input signal for a set period, and the device automatically wakes within 0.3 ms upon detecting an incoming RS-232 transition, making it suitable for coin-cell-powered designs that must last months in standby.
How does the Schmitt-trigger receiver input of the MAX3221ECPWRG4 improve data integrity on RS-232 cables longer than 15 m?
Schmitt-trigger hysteresis of approximately 0.5V prevents the receiver from toggling on slow-edge or noisy RS-232 signals caused by cable capacitance on runs exceeding 15 m, ensuring clean UART data at the host microcontroller even at standard baud rates up to 115200 bps on cables with total capacitance up to 2500 pF.
When should a designer choose the MAX3221ECPWRG4 over a dual-channel MAX3232 for an embedded serial port design?
When the application only needs a single TX/RX UART channel and board space is constrained, the MAX3221ECPWRG4's 16-pin TSSOP with one driver and one receiver occupies less PCB area than the 16-pin MAX3232 dual-channel device, saving roughly 20% in footprint while still meeting full EIA-232-F electrical compliance from 3V to 5.5V.
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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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