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Texas Instruments MAX3232IPWR
- Part No.:
- MAX3232IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX3232IPWR.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:40,425
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Product details
Overview
MAX3232IPWR from Texas Instruments is a 3-V to 5.5-V dual RS-232 line driver and receiver IC with ±15-kV HBM ESD protection, two drivers/two receivers, 250 kbit/s data rate, and 300 μA typical supply current. It interfaces UART logic to RS-232 physical layer in space-constrained industrial and portable systems.
For engineers reviewing the MAX3232IPWR datasheet, MAX3232IPWR pinout, MAX3232IPWR application, or MAX3232IPWR equivalent, this page delivers verified electrical specs, TSSOP-16 package details, true functional alternatives, and design-critical timing and ESD performance data - all confirmed for the -40°C to +85°C industrial-grade variant.
Technical Context
The MAX3232IPWR integrates a dual charge-pump circuit generating ±5.5 V from a single 3.3 V or 5 V supply, enabling full RS-232 voltage levels without external high-voltage sources. Its drivers deliver ±5.4 V output swing into 3-kΩ loads, while receivers accept ±25 V input with 3–7 kΩ input resistance and 0.3 V hysteresis.
It operates in normal mode when VCC is powered (3 V–5.5 V), and enters safe high-impedance state when unpowered - allowing hot-plug compatibility with live RS-232 buses. All DIN and RIN pins tolerate 5-V logic inputs even at 3.3-V VCC, supporting mixed-voltage system integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 3.0 V to 5.5 V - Enables direct interface with 3.3 V or 5 V logic domains without level shifters. |
| Data Rate | Up to 250 kbit/s - Supports standard UART baud rates including 115.2 kbit/s with margin for cable loss and noise. |
| ESD Protection | ±15 kV HBM on RIN/DOUT/GND - Eliminates need for external TVS diodes in serial port I/O protection schemes. |
| Supply Current | 300 μA typical - Enables battery operation in handheld equipment with minimal quiescent power impact. |
| Capacitor Requirement | 4 × 0.1 μF ceramic - Reduces BOM count and board area vs legacy RS-232 transceivers requiring larger electrolytics. |
| Driver Slew Rate | Max 30 V/μs - Limits EMI emissions while maintaining signal integrity over typical RS-232 cable lengths. |
| Receiver Input Threshold | VIT+ = 1.5–2.4 V, VIT− = 0.6–1.5 V - Ensures robust noise immunity against ground bounce and crosstalk in noisy industrial environments. |
Pinout & Package
TSSOP-16 package (5.00 mm × 4.40 mm), thin shrink small-outline package with exposed pad option not specified; RoHS-compliant, NIPDAU/SN lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 C1+ | Charge pump capacitor positive terminal | Connects to positive lead of 0.1 μF flying capacitor; critical for stable ±V generation. |
| 2 V+ | Positive charge pump output | Provides +5.5 V rail for RS-232 drivers; must be decoupled locally. |
| 3 C1− | Charge pump capacitor negative terminal | Completes first flying capacitor loop; low-inductance routing required. |
| 4 C2+ | Second flying capacitor positive terminal | Feeds negative charge pump stage; pairs with C2− to generate −5.5 V. |
| 5 C2− | Second flying capacitor negative terminal | Reference node for V− generation; shares ground return path with C1−. |
| 6 V− | Negative charge pump output | Provides −5.5 V rail; enables true bipolar RS-232 signaling from single supply. |
| 7 DOUT2 | RS-232 driver output 2 | Drives second RS-232 line (e.g., RTS/CTS) at ±5.4 V; slew-rate limited for EMC compliance. |
| 8 RIN2 | RS-232 receiver input 2 | Accepts ±25 V RS-232 signals; includes internal 5 kΩ termination and hysteresis. |
| 9 ROUT2 | Logic-level receiver output 2 | Delivers CMOS-compatible 0 V / VCC logic outputs to UART RX2 pin. |
| 10 DIN2 | Logic-level driver input 2 | Accepts 0 V / VCC logic inputs; 5-V tolerant at 3.3-V VCC for mixed-voltage designs. |
| 11 DIN1 | Logic-level driver input 1 | Primary TX input from UART; supports TTL/CMOS logic families directly. |
| 12 ROUT1 | Logic-level receiver output 1 | Primary RX output to UART; drives standard CMOS load with <300 ns propagation delay. |
| 13 RIN1 | RS-232 receiver input 1 | Main RS-232 receive line (e.g., RxD); fails-safe open-input default = high. |
| 14 DOUT1 | RS-232 driver output 1 | Main RS-232 transmit line (e.g., TxD); compliant with TIA/EIA-232-F voltage swing. |
| 15 GND | Ground reference | Common return for charge pump, logic, and RS-232 sections; requires low-impedance PCB plane. |
| 16 VCC | Power supply input | Single 3.3 V or 5 V supply input; bypass capacitor (0.1 μF) required at pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual charge-pump architecture | Generates ±5.5 V rails internally - eliminates need for external DC/DC converter or split supply in embedded serial interfaces. |
| ±15-kV HBM ESD protection | Protects RIN/DOUT/GND pins without external components - reduces system-level ESD test failure risk in industrial field deployments. |
| 300 μA typical ICC | Enables always-on serial monitoring in battery-powered devices with multi-year runtime (e.g., sensor nodes, portable diagnostics). |
| 5-V logic compatible at 3.3-V VCC | Allows direct connection of 5-V microcontrollers or FPGAs to DIN pins - avoids level-shifter ICs and associated layout complexity. |
| Hot-swap safe unpowered mode | Permits live insertion into active RS-232 ports without damaging MAX3232IPWR or remote equipment - critical for modular backplane designs. |
Applications
| Industrial PCs | Hand-held Equipment |
|---|---|
Use Scenario: Serial communication between PLC controller and HMI panel in factory automation cabinet. IC Role / Device Role / Timing Role: RS-232 level translator bridging 3.3-V ARM-based HMI processor to legacy 12-V RS-232 field devices. Use Value: ±15-kV ESD tolerance prevents field failures during maintenance; 300 μA ICC extends uptime in fanless passive-cooled enclosures. |
Use Scenario: Portable barcode scanner with integrated RS-232 output to legacy warehouse terminals. IC Role / Device Role / Timing Role: Dual-channel transceiver handling both scanner data (TxD/RxD) and trigger control (RTS/CTS) over single 3.3-V supply. Use Value: 4 × 0.1 μF capacitors minimize PCB footprint; TSSOP-16 package fits sub-50 mm² handheld form factor. |
| Notebooks | Battery-powered Systems |
Use Scenario: Docking station providing RS-232 port for legacy lab instruments via USB-to-serial bridge. IC Role / Device Role / Timing Role: Final-stage RS-232 driver/receiver ensuring TIA/EIA-232-F compliance before connector pinout. Use Value: 250 kbit/s capability supports high-speed instrument control; 3.3-V operation matches USB bridge IC voltage domain. |
Use Scenario: Remote environmental sensor node transmitting data via RS-232 to solar-charged gateway. IC Role / Device Role / Timing Role: Low-power serial interface enabling periodic wake-up, measurement, and transmission bursts. Use Value: 300 μA ICC allows >10-year battery life with CR2032; unpowered-mode safety prevents damage during battery replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65C3232DBR | Higher 1-Mbit/s data rate; identical TSSOP-16 package and pinout; same ±15-kV ESD rating. | Targeted for high-speed industrial networking where 250 kbit/s is insufficient. | Select SN65C3232DBR only if system requires >250 kbit/s; otherwise MAX3232IPWR offers lower cost and proven reliability at standard UART rates. |
| MAX3232CPWR | Same die and functionality but commercial temperature range (0°C to 70°C); identical electrical specs and pinout. | Suitable for office equipment or consumer electronics where extended temperature is unnecessary. | Choose MAX3232CPWR for cost-sensitive non-industrial applications; MAX3232IPWR is mandatory for operation below −40°C or above 85°C. |
Compared with SN65C3232DBR and MAX3232CPWR, the MAX3232IPWR uniquely balances industrial temperature range (−40°C to +85°C), 250 kbit/s capability, and ultra-low 300 μA supply current - making it optimal for battery-operated or thermally demanding embedded serial interfaces where speed beyond 250 kbit/s is unnecessary.
Availability
MAX3232IPWR is available at Aetrix Electronics and suitable for industrial PCs, hand-held equipment, and battery-powered systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX3232IPWR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The MAX3232 product line targets robust RS-232 interface needs in harsh environments - designed specifically for industrial automation, portable instrumentation, and legacy-system integration where ESD resilience and wide temperature operation are non-negotiable.
FAQ
What is the operating temperature range of the MAX3232IPWR?
The MAX3232IPWR is rated for industrial operation from −40°C to +85°C. This extended range is confirmed in TI's official packaging addendum and distinguishes it from commercial variants like MAX3232CPWR (0°C to 70°C). The 'I' suffix in MAX3232IPWR explicitly denotes the industrial temperature grade, validated across thermal stress testing per JEDEC JESD22 standards.
Does the MAX3232IPWR require external high-voltage supplies?
No. The MAX3232IPWR integrates a dual charge-pump circuit that generates ±5.5 V internally from a single 3.3 V or 5 V supply. Only four 0.1 μF ceramic capacitors are needed - no external DC/DC converter, transformer, or split supply is required. This is confirmed in the device description, simplified schematic, and Typical Operating Circuit sections of the TI datasheet SLLS410O.
Is the MAX3232IPWR pin-compatible with other MAX3232 variants?
Yes - all MAX3232 variants (including MAX3232IPWR, MAX3232CPWR, and MAX3232IDBR) share identical pin functions and assignments across SOIC, SSOP, and TSSOP packages. Pin mapping is standardized per Table 5-1 in the datasheet, and the TSSOP-16 footprint of MAX3232IPWR matches MAX3232CPWR exactly, enabling drop-in replacement where temperature range permits.
What RS-232 standards does the MAX3232IPWR comply with?
The MAX3232IPWR meets or exceeds TIA/EIA-232-F and ITU V.28 standards, as explicitly stated in its feature list and description. Its driver output swing (±5.4 V min), receiver input range (±25 V), and input impedance (3–7 kΩ) align with these specifications. Compliance is verified through TI's characterization testing and referenced in Section 3 (Description) and Section 6 (Specifications) of SLLS410O.
Can the MAX3232IPWR operate with a 3.3-V supply while interfacing to 5-V logic inputs?
Yes. The MAX3232IPWR accepts 5-V logic-level inputs on DIN pins even when VCC = 3.3 V - a feature explicitly listed under "Features" and verified in Section 6.3 (Recommended Operating Conditions). This 5-V-tolerant input capability eliminates external level shifters when connecting to legacy 5-V microcontrollers or FPGAs.
MAX3232IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- RS232
- Number of Drivers/Receivers:
- 2/2
- Duplex:
- Full
- Receiver Hysteresis:
- 300 mV
- Data Rate:
- 250kbps
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
MAX3232IPWR FAQ
1.How can I place an order for MAX3232IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3232IPWR 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 MAX3232IPWR reliable?
The price and inventory of MAX3232IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3232IPWR is usually 5 days.
3.What payment methods are accepted for MAX3232IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3232IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3232IPWR?
MAX3232IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3232IPWR 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 MAX3232IPWR?
For technical support, including MAX3232IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3232IPWR requirements.
6.How does Aetrix verify that MAX3232IPWR is sourced from the original manufacturer or authorized distributors?
All MAX3232IPWR 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 MAX3232IPWR meets industry standards.
7.What is the process for return or replacement of MAX3232IPWR?
All MAX3232IPWR units undergo pre-shipment inspection (PSI). If there is an issue with MAX3232IPWR, 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 MAX3232IPWR part is unused and in its original packaging.
Return procedure for MAX3232IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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