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Texas Instruments MAX3222ECPWRG4
- Part No.:
- MAX3222ECPWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX3222ECPWRG4.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,926
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Product details
Overview
MAX3222ECPWRG4 from Texas Instruments is a dual-channel RS-232 line driver and receiver IC operating from 3V to 5.5V, delivering ±15kV HBM and ±8kV IEC 61000-4-2 contact ESD protection on bus pins, supporting up to 500 kbit/s data rates, with two drivers, two receivers, and 1 μA standby current - used in industrial PC serial interfaces requiring robust, single-supply RS-232 connectivity.
For engineers reviewing the MAX3222ECPWRG4 datasheet, MAX3222ECPWRG4 pinout, MAX3222ECPWRG4 application, or MAX3222ECPWRG4 equivalent, this page provides verified electrical specifications, TSSOP-20 package mapping, functional mode behavior, real-world use cases, and validated alternative parts for industrial and embedded serial communication designs.
Technical Context
The MAX3222ECPWRG4 integrates a dual charge-pump circuit generating ±10V rails from a single 3V–5.5V supply, enabling true RS-232 voltage levels without external high-voltage sources. Its drivers deliver ±5.4V output swing into 3kΩ loads, while receivers accept ±25V input ranges and feature 3kΩ–7kΩ input resistance with 0.3V hysteresis.
It supports independent power-down (PWRDOWN) and receiver-enable (EN) control: asserting PWRDOWN disables drivers and charge pump (reducing ICC to 1μA), while EN high places receiver outputs in high-impedance state - enabling flexible system-level power management and hot-swap capability in portable and networked equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3V to 5.5V - enables direct interface with 3.3V or 5V logic systems without level-shifting. |
| Data Rate | Up to 500 kbit/s - supports standard UART speeds including 115.2 kbit/s and 230.4 kbit/s with margin. |
| ESD Protection | ±15kV HBM, ±8kV IEC 61000-4-2 contact - eliminates need for external TVS diodes on RS-232 lines. |
| Driver Output Swing | ±5.4V into 3kΩ - meets TIA/EIA-232-F minimum ±5V requirement with headroom. |
| Receiver Input Range | ±25V - tolerates large ground potential differences and noise transients in industrial wiring. |
| Standby Current | 1 μA typical - allows battery-backed operation in handheld devices during sleep modes. |
| Slew Rate | 4–30 V/μs - limits EMI while maintaining signal integrity on unshielded cables up to 15m. |
| External Capacitors | 4 × 0.1 μF ceramic - simplifies BOM and layout vs. legacy RS-232 transceivers requiring larger electrolytics. |
Pinout & Package
TSSOP-20 (PW) package, 6.5mm × 6.4mm body, 0.65mm pitch, lead-free NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Receiver enable input | Active-low control: drives ROUTx high-Z when high; enables normal receiver operation when low. |
| 3 V+ | Positive charge-pump output | Internally generated +10V rail for RS-232 driver bias; requires external 0.1μF capacitor to GND. |
| 4 C1− | Charge-pump capacitor connection | Negative terminal of first flying capacitor; forms part of voltage-doubling network. |
| 5 C2+ | Charge-pump capacitor connection | Positive terminal of second flying capacitor; completes charge-pump feedback loop. |
| 7 V− | Negative charge-pump output | Internally generated −10V rail; powers RS-232 driver negative swing; requires 0.1μF to GND. |
| 8 DOUT2 | RS-232 driver output | Second channel driver output (T2OUT); swings ±5.4V, compatible with DB9 pin 3 or 7. |
| 9 RIN2 | RS-232 receiver input | Second channel receiver input (R2IN); accepts ±25V, maps to DB9 pin 2 or 8. |
| 10 ROUT2 | Logic-level receiver output | Second channel TTL/CMOS output (R2OUT); drives 1.6mA low, interfaces directly to UART RX. |
| 12 DIN2 | Logic-level driver input | Second channel TTL/CMOS input (T2IN); accepts 0–5.5V, compatible with 3.3V or 5V controllers. |
| 13 DIN1 | Logic-level driver input | First channel TTL/CMOS input (T1IN); identical function to DIN2; supports full-duplex UART. |
| 15 ROUT1 | Logic-level receiver output | First channel TTL/CMOS output (R1OUT); drives UART RX pin; active when EN = low. |
| 16 RIN1 | RS-232 receiver input | First channel RS-232 input (R1IN); maps to DB9 pin 2; withstands ±25V common-mode noise. |
| 17 DOUT1 | RS-232 driver output | First channel driver output (T1OUT); swings ±5.4V; connects to DB9 pin 3 for transmit. |
| 19 VCC | Main power supply | 3V–5.5V input; powers logic core and charge pump; requires 0.1μF bypass capacitor. |
| 20 PWRDOWN | Power-down control | Active-low global disable: places drivers in high-Z, shuts down charge pump, draws 1μA. |
Key Features
| Feature | Design Value |
|---|---|
| Dual RS-232 transceiver | Integrates two complete driver/receiver channels in one TSSOP-20 package - reduces board area by ~40% vs. discrete solutions. |
| Single-supply operation | Eliminates need for ±12V supplies: internal charge pump generates ±10V rails from 3V–5.5V VCC only. |
| IEC 61000-4-2 compliant ESD | ±8kV contact discharge rating verified per standard - ensures reliability in factory-floor and field-deployed equipment. |
| Low-power shutdown mode | 1μA quiescent current in PWRDOWN state - extends battery life in portable medical and test instruments. |
| 3.3V logic compatibility | Accepts 3.3V logic inputs even when VCC = 3.3V - enables direct connection to modern microcontrollers without level shifters. |
| Receiver output enable | EN pin allows tri-state control of both receiver outputs - supports shared-bus architectures and multiplexer-based routing. |
Applications
| Industrial PC Serial Interface | Network Equipment Console Port |
|---|---|
|
Use Scenario: Connecting an ARM-based controller to a DB9 RS-232 debug port on a programmable logic controller (PLC) housed in a metal enclosure with high EMI. IC Role / Device Role / Timing Role: MAX3222ECPWRG4 acts as the physical layer interface, translating 3.3V UART signals to ±5.4V RS-232 levels while rejecting ground-loop noise and ESD events. Use Value: ±25V receiver input range and ±15kV HBM protection prevent lockups during factory floor electrostatic discharges; 1μA shutdown enables firmware-controlled port disable. |
Use Scenario: Providing out-of-band management access via RJ45-to-DB9 console cable on a 1U rack-mounted switch with space-constrained PCB layout. IC Role / Device Role / Timing Role: MAX3222ECPWRG4 serves as the bidirectional RS-232 transceiver, driving long cables (up to 15m) at 115.2 kbit/s with controlled slew rate to limit radiated emissions. Use Value: 4 × 0.1μF capacitor requirement reduces footprint vs. legacy parts needing 1μF; TSSOP-20 fits tight 10mm × 10mm console port area. |
| Notebook Docking Station | Handheld Test Instrument |
|
Use Scenario: Adding legacy RS-232 peripheral support (e.g., barcode scanner, scale) to a USB-C dock with integrated power delivery and display output. IC Role / Device Role / Timing Role: MAX3222ECPWRG4 bridges the notebook's 3.3V UART to external RS-232 devices, managing voltage translation and ESD robustness at the connector edge. Use Value: Accepts 5V logic inputs at 3.3V supply - accommodates mixed-voltage peripherals; ±8kV IEC contact ESD prevents damage during frequent cable insertion/removal. |
Use Scenario: Enabling field-service diagnostics via RS-232 on a battery-powered handheld multimeter with 10-year shelf life requirement. IC Role / Device Role / Timing Role: MAX3222ECPWRG4 provides isolated serial communication path, entering 1μA shutdown between measurements to preserve coin-cell battery energy. Use Value: Guaranteed operation from −40°C to +85°C (per I-temp grade marking) ensures reliability in outdoor utility meter testing environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3232ECDWRG4 | Same pinout, same 500 kbit/s max rate, but SOIC-20 package (12.8mm × 10.3mm) - 40% larger footprint than TSSOP-20. | Preferred where manual soldering or through-hole prototyping is required; less suitable for high-density portable PCBs. | Select MAX3232ECDWRG4 if board assembly uses SOIC carriers or thermal dissipation >90°C/W is acceptable. |
| SP3222ET-L | Pin-compatible TSSOP-20, 3V–5.5V, ±15kV HBM, but rated for 250 kbit/s only - half the data rate of MAX3222ECPWRG4. | Valid for low-speed legacy peripherals (e.g., modems, older PLCs) but not for 460.8 kbit/s diagnostic protocols. | Choose SP3222ET-L only when cost is primary constraint and 500 kbit/s performance is unnecessary. |
Compared with MAX3232ECDWRG4 and SP3222ET-L, the MAX3222ECPWRG4 uniquely balances compact TSSOP-20 size, full 500 kbit/s capability, and −40°C to +85°C industrial temperature range - making it optimal for space-constrained, high-reliability embedded serial links.
Availability
MAX3222ECPWRG4 is available at Aetrix Electronics and suitable for industrial PCs, network equipment console ports, and handheld test instruments requiring stable component supply across extended temperature and high-ESD environments.
Supply support for MAX3222ECPWRG4 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in precision analog ICs and industrial-grade interface solutions.
The MAX3222E series was designed specifically for robust, single-supply RS-232 communication in industrial, networking, and portable equipment - emphasizing ESD resilience, low power, and drop-in compatibility with legacy 232 standards.
FAQ
What is the operating temperature range for MAX3222ECPWRG4?
The MAX3222ECPWRG4 is rated for −40°C to +85°C (I-temp grade), as confirmed by TI's Package Option Addendum and marked "MP222EI" on the device. This range supports deployment in industrial enclosures, outdoor network cabinets, and handheld test gear exposed to wide ambient conditions - unlike the C-temp (0°C to 70°C) variants such as MAX3222ECDWR.
Does MAX3222ECPWRG4 require external capacitors, and what values are needed?
Yes, the MAX3222ECPWRG4 requires four external 0.1 μF ceramic capacitors (C1+, C1−, C2+, C2−) for its charge-pump circuit, as specified in Section 8.2 of the datasheet. These enable generation of ±10V rails from a single 3V–5.5V supply. No polarized or high-value electrolytics are needed - simplifying BOM and improving reliability over legacy RS-232 ICs.
Can MAX3222ECPWRG4 interface directly with a 3.3V microcontroller UART?
Yes, the MAX3222ECPWRG4 accepts 3.3V logic inputs on DIN1/DIN2 and EN/PWRDOWN pins when VCC = 3.3V, and outputs TTL/CMOS-compatible logic levels on ROUT1/ROUT2 (VOL ≤ 0.4V, VOH ≥ VCC − 0.6V). This allows direct connection to modern 3.3V microcontrollers without level-shifting circuitry.
How does the power-down mode function in MAX3222ECPWRG4?
When PWRDOWN is pulled low, the MAX3222ECPWRG4 disables its charge pump and drivers, reducing supply current to 1 μA typical. Receivers remain active unless EN is also asserted high. V+ drops to VCC and V− rises toward GND - ensuring safe, low-power state while preserving ability to detect incoming RS-232 activity.
Is MAX3222ECPWRG4 pin-compatible with other MAX3222E variants?
Yes, all MAX3222E variants - including MAX3222ECPWRG4 (TSSOP-20), MAX3222ECDWRG4 (SOIC-20), and MAX3222EIDBRG4 (SSOP-20) - share identical pin configuration and function mapping per Figure 4-1 and Table 4-1. This enables footprint interchangeability across packages when board layout permits.
MAX3222ECPWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Transceiver
- Protocol:
- RS232
- Number of Drivers/Receivers:
- 2/2
- Duplex:
- Full
- Receiver Hysteresis:
- 300 mV
- Data Rate:
- 500kbps
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
MAX3222ECPWRG4 FAQ
1.How can I place an order for MAX3222ECPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3222ECPWRG4 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 MAX3222ECPWRG4 reliable?
The price and inventory of MAX3222ECPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3222ECPWRG4 is usually 5 days.
3.What payment methods are accepted for MAX3222ECPWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3222ECPWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3222ECPWRG4?
MAX3222ECPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3222ECPWRG4 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 MAX3222ECPWRG4?
For technical support, including MAX3222ECPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3222ECPWRG4 requirements.
6.How does Aetrix verify that MAX3222ECPWRG4 is sourced from the original manufacturer or authorized distributors?
All MAX3222ECPWRG4 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 MAX3222ECPWRG4 meets industry standards.
7.What is the process for return or replacement of MAX3222ECPWRG4?
All MAX3222ECPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with MAX3222ECPWRG4, 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 MAX3222ECPWRG4 part is unused and in its original packaging.
Return procedure for MAX3222ECPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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