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Texas Instruments MAX3232IDBR
- Part No.:
- MAX3232IDBR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX3232IDBR.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,197
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Product details
Overview
MAX3232IDBR from Texas Instruments is a dual-channel RS-232 line driver and receiver IC with ±15-kV HBM ESD protection, operating from a single 3-V to 5.5-V supply, supporting up to 250 kbit/s data rates, featuring two drivers and two receivers, and designed for UART-to-RS232 interface in industrial and portable embedded systems.
For engineers reviewing the MAX3232IDBR datasheet, MAX3232IDBR pinout, MAX3232IDBR application, or MAX3232IDBR equivalent, this device is selected for low-power serial communication where robust ESD immunity, wide VCC range, and compatibility with 3.3-V logic inputs are required in space-constrained SSOP-16 layouts.
Technical Context
The MAX3232IDBR integrates a dual charge-pump circuit generating ±5.4-V RS-232 output levels from 3.3-V or 5-V input, eliminating need for dual supplies. Its receivers accept ±25-V RS-232 input signals and deliver TTL/CMOS-compatible outputs with 0.4-V VOL and VCC–0.6-V VOH.
Driver output slew rate is limited to ≤30 V/μs (typical 6–30 V/μs), ensuring compliance with TIA/EIA-232-F rise/fall time requirements and reducing EMI. The device supports open-input receiver behavior (ROUT = high when RIN is floating) and remains safe during VCC = 0 V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3.0 V to 5.5 V - Enables direct interface with 3.3-V or 5-V logic domains without level-shifting circuitry. |
| Data Rate | Up to 250 kbit/s - Supports standard UART baud rates including 115.2 kbit/s and 230.4 kbit/s with margin. |
| ESD Protection | ±15-kV HBM on RIN/DOUT/GND - Eliminates need for external TVS diodes in most industrial and portable designs. |
| Supply Current | 300 μA typical - Enables battery-powered operation with multi-year runtime in low-duty-cycle serial monitoring. |
| Capacitor Count | 4 × 0.1 μF - Uses only small, low-cost ceramic capacitors; no electrolytics or polarized types required. |
| Logic Compatibility | Accepts 5-V logic inputs at 3.3-V VCC - Allows mixed-voltage system integration without input clamping or resistors. |
| Operating Temp | –40°C to +85°C - Qualified for extended industrial temperature range, suitable for automotive cabin and factory-floor applications. |
Pinout & Package
MAX3232IDBR is housed in a 16-pin SSOP (DB) package measuring 6.20 mm × 5.30 mm, with 0.65-mm lead pitch and gull-wing leads compatible with standard surface-mount reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1+, C1−, C2+, C2− | Charge-pump capacitor terminals | Interface external 0.1-μF ceramics to generate ±5.4-V internal rails; polarity-sensitive for C1/C2 selection. |
| V+, V− | Charge-pump output nodes | Provide regulated ±5.4-V supplies for RS-232 drivers; not user-accessible-must connect only to external caps. |
| DIN1, DIN2 | Logic-level inputs | Accept 3.3-V or 5-V CMOS/TTL signals from UART TX lines; tolerate 5-V inputs even at 3.3-V VCC. |
| DOUT1, DOUT2 | RS-232 driver outputs | Deliver ±5.4-V compliant RS-232 signals (±3 V min swing) to DB9 connectors or cable drivers. |
| RIN1, RIN2 | RS-232 receiver inputs | Accept ±25-V RS-232 voltage levels; include internal 5-kΩ termination and hysteresis for noise immunity. |
| ROUT1, ROUT2 | Logic-level outputs | Drive UART RX pins with 0.4-V VOL and VCC–0.6-V VOH; high when corresponding RIN is open or disconnected. |
| VCC | Power supply input | Single 3.0–5.5-V rail powers entire IC-including charge pump, drivers, receivers, and logic interface. |
| GND | Ground reference | Common return for all internal circuits; must be low-impedance connection to minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| ±15-kV HBM ESD protection | Protects RIN/DOUT/GND pins without external TVS diodes-reduces BOM count and PCB area in harsh environments. |
| TIA/EIA-232-F & ITU V.28 compliance | Guarantees interoperability with legacy and modern RS-232 peripherals including modems, PLCs, and industrial sensors. |
| 3-V to 5.5-V single-supply operation | Eliminates need for ±12-V supplies or DC-DC converters-simplifies power architecture in compact embedded systems. |
| 250 kbit/s max data rate | Supports full-duplex UART communication at 115.2 kbit/s with timing margin, enabling reliable firmware updates and telemetry. |
| 300 μA typical supply current | Enables always-on serial debug interfaces in battery-powered devices such as handheld test equipment and remote sensors. |
| Open-input receiver behavior | Ensures defined logic-high ROUT state when RS-232 cable is unplugged-prevents spurious UART framing errors or resets. |
Applications
| Industrial Automation | Portable Diagnostic Equipment |
|---|---|
|
Use Scenario: Connecting microcontroller-based PLC I/O modules to legacy RS-232 HMIs and configuration terminals in factory-floor environments with high EMI and frequent cable hot-plug events. IC Role / Device Role / Timing Role: Translates 3.3-V UART signals to ±5.4-V RS-232 levels while providing ±15-kV ESD protection on serial port pins and maintaining <300 ns propagation delay. Use Value: Prevents field failures due to static discharge during maintenance, eliminates need for external protection components, and ensures reliable boot-time configuration over long cables. |
Use Scenario: Enabling serial firmware updates and real-time sensor logging in handheld medical diagnostic tools powered by Li-ion batteries with strict power budget constraints. IC Role / Device Role / Timing Role: Provides bidirectional UART-to-RS232 bridging with 300 μA quiescent current and 3.3-V logic compatibility, supporting both host PC and embedded controller interfaces. Use Value: Extends battery life beyond 12 months in sleep mode, withstands repeated electrostatic contact during clinical use, and maintains signal integrity across 2-m shielded cables. |
| Network Infrastructure Management | Embedded Edge Gateway |
|
Use Scenario: Providing out-of-band management console access on enterprise switches and routers via RJ45-to-DB9 serial adapters in data center racks subject to thermal cycling and vibration. IC Role / Device Role / Timing Role: Acts as RS-232 physical layer transceiver with –40°C to +85°C rating, driving standard 3-kΩ loads at 115.2 kbit/s with <30 V/μs slew control. Use Value: Ensures console availability during thermal stress events, avoids signal reflections on backplane traces, and meets ITU V.28 common-mode noise rejection specs. |
Use Scenario: Interfacing ARM-based edge gateways to legacy Modbus RTU field devices (e.g., energy meters, HVAC controllers) deployed in unconditioned outdoor enclosures. IC Role / Device Role / Timing Role: Serves as isolated RS-232 interface front-end with robust input tolerance (±25 V), hysteresis-enhanced receiver thresholds, and fail-safe open-input logic. Use Value: Prevents misreads during lightning-induced transients, enables plug-and-play commissioning without external biasing, and sustains operation across wide ambient temperature swings. |
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 | Rated for –40°C to +85°C, but specifies 1-Mbit/s max data rate and uses different charge-pump topology requiring 0.047-μF/0.33-μF capacitor set at 5 V. | Targeted at high-speed industrial links where 250 kbit/s is insufficient; lacks same ESD rating on GND pin per datasheet. | Select SN65C3232DBR only when >250 kbit/s is required and layout allows capacitor value change; verify GND-pin ESD margin in final system. |
| MAX3232CDR | Same core architecture and pinout, but rated for 0°C to +70°C and marked MAX3232C instead of MAX3232I; identical electrical specs except temp range. | Suitable for commercial-grade applications like office printers or consumer networking gear where extended temperature is unnecessary. | Choose MAX3232CDR for cost-sensitive, non-industrial designs with ambient temps strictly within 0–70°C; no PCB changes needed. |
Compared with SN65C3232DBR and MAX3232CDR, the MAX3232IDBR uniquely combines industrial temperature range (–40°C to +85°C), ±15-kV HBM on GND, and guaranteed 250-kbit/s operation using only 0.1-μF capacitors-making it optimal for ruggedized, long-lifecycle embedded deployments.
Availability
MAX3232IDBR is available at Aetrix Electronics and suitable for industrial automation, portable diagnostic equipment, and network infrastructure management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX3232IDBR 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 and embedded processing solutions, with over 90 years of innovation in precision analog, power management, and interface ICs.
The MAX3232IDBR belongs to TI's RS-232 transceiver product line, engineered specifically for robust, low-power serial communication in industrial, medical, and networking equipment operating under wide temperature and ESD stress conditions.
FAQ
What is the maximum data rate supported by the MAX3232IDBR?
The MAX3232IDBR supports a maximum data signaling rate of 250 kbit/s under recommended operating conditions (RL = 3 kΩ, CL = 1000 pF). This is verified across its full –40°C to +85°C temperature range and ensures reliable operation with standard UART implementations including 115.2 kbit/s and 230.4 kbit/s. Higher rates may cause timing violations or increased bit error rates.
Does the MAX3232IDBR require external charge-pump capacitors?
Yes, the MAX3232IDBR requires four external 0.1-μF ceramic capacitors (C1+, C1−, C2+, C2−) to enable its dual charge-pump circuit. These capacitors generate the ±5.4-V internal rails needed for RS-232 level translation. No polarized or electrolytic capacitors are required-standard X7R or C0G ceramics suffice.
Can the MAX3232IDBR operate with a 3.3-V supply while accepting 5-V logic inputs?
Yes, the MAX3232IDBR accepts 5-V logic-level inputs on DIN1 and DIN2 pins even when powered from a 3.3-V VCC supply. This is explicitly specified in the Recommended Operating Conditions table and eliminates the need for external level-shifting circuitry when interfacing with mixed-voltage systems.
What is the ESD protection level on the GND pin of the MAX3232IDBR?
The MAX3232IDBR provides ±15-kV HBM ESD protection on the GND pin, as confirmed in Section 6.2 (ESD Ratings) of the official datasheet. This terminal-to-terminal protection extends across RIN, DOUT, and GND pins-enabling robust handling in manufacturing, field service, and cable hot-plug scenarios without additional protection components.
Is the MAX3232IDBR pin-compatible with other MAX3232 variants?
Yes, the MAX3232IDBR is pin-compatible with all 16-pin MAX3232 variants in SSOP (DB), SOIC (D), SOIC (DW), and TSSOP (PW) packages. Its pin configuration matches the standard MAX3232 footprint, allowing direct substitution within the same package type-provided temperature, ESD, and capacitor requirements align with the target application.
MAX3232IDBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.209", 5.30mm 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-SSOP
MAX3232IDBR FAQ
1.How can I place an order for MAX3232IDBR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3232IDBR 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 MAX3232IDBR reliable?
The price and inventory of MAX3232IDBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3232IDBR is usually 5 days.
3.What payment methods are accepted for MAX3232IDBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3232IDBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3232IDBR?
MAX3232IDBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3232IDBR 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 MAX3232IDBR?
For technical support, including MAX3232IDBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3232IDBR requirements.
6.How does Aetrix verify that MAX3232IDBR is sourced from the original manufacturer or authorized distributors?
All MAX3232IDBR 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 MAX3232IDBR meets industry standards.
7.What is the process for return or replacement of MAX3232IDBR?
All MAX3232IDBR units undergo pre-shipment inspection (PSI). If there is an issue with MAX3232IDBR, 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 MAX3232IDBR part is unused and in its original packaging.
Return procedure for MAX3232IDBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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