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Texas Instruments MAX3232EIPWRQ1
- Part No.:
- MAX3232EIPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX3232EIPWRQ1.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,718
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Product details
Overview
MAX3232EIPWRQ1 from Texas Instruments is an automotive-qualified RS-232 transceiver IC with two drivers and two receivers, ±15kV IEC ESD protection, 3V–5.5V single-supply operation, and 250kbit/s data rate. It interfaces UART logic-level signals to RS-232 physical-layer lines in vehicle infotainment and body control modules.
For engineers reviewing the MAX3232EIPWRQ1 datasheet, MAX3232EIPWRQ1 pinout, MAX3232EIPWRQ1 application, or MAX3232EIPWRQ1 equivalent, key selection criteria include automotive AEC-Q100 qualification, TIA/EIA-232-F compliance, low 300μA standby current, 0.1μF external capacitor requirement, and TSSOP-16 package compatibility with space-constrained ECUs.
Technical Context
The MAX3232EIPWRQ1 integrates a dual charge-pump voltage converter to generate ±10V RS-232 output levels from a single 3.3V or 5V supply, eliminating need for dual ±12V rails. Its receiver input threshold (VIT+ = 1.5–2.4V, VIT− = 0.6–1.5V) ensures robust noise immunity across automotive temperature range (−40°C to +85°C).
Driver slew rate is controlled at 4–30 V/μs to limit EMI while maintaining 250kbit/s signaling; pulse skew ≤300 ns guarantees channel-to-channel timing alignment critical for multi-drop RS-232 buses in telematics gateways.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3V to 5.5V - Enables direct integration with 3.3V microcontrollers and 5V legacy systems without level-shifting. |
| Data Rate | Up to 250kbit/s - Supports full-speed RS-232 communication in diagnostic interfaces and CAN gateway bridging. |
| ESD Protection | ±15kV IEC 61000-4-2 - Protects serial ports against human-body-model discharges in service bay environments. |
| Standby Current | 300μA typical - Extends battery life in always-on vehicle modules like remote keyless entry receivers. |
| Capacitor Requirement | 4 × 0.1μF - Reduces BOM cost and board area vs. legacy RS-232 ICs requiring larger or polarized capacitors. |
| Operating Temperature | −40°C to +85°C - Qualified per AEC-Q100 Grade 2 for under-hood and cabin-mounted electronics. |
| Logic Compatibility | Accepts 5V logic inputs at 3.3V VCC - Simplifies interface to mixed-voltage SoCs in ADAS domain controllers. |
Pinout & Package
TSSOP-16 (PW) package, 5.0mm × 6.4mm footprint, 1.2mm max height, lead-free NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1+, C1−, C2+, C2− | Charge-pump capacitor connections | Enable ±10V RS-232 voltage generation using four 0.1μF ceramic caps; no polarity sensitivity required. |
| V+, V− | Charge-pump intermediate outputs | Internal nodes not intended for external connection; must remain unconnected per design guidelines. |
| DIN1, DIN2 | Logic-side input (UART TX) | Accept CMOS/TTL logic levels; 5V-tolerant when VCC = 3.3V, eliminating external level shifters. |
| ROUT1, ROUT2 | Logic-side output (UART RX) | Drive standard CMOS inputs with VOH ≥ VCC − 0.1V and VOL ≤ 0.4V at 1.6mA load. |
| RIN1, RIN2 | RS-232 line input (cable side) | Accept ±25V input range with 3–7kΩ input resistance; hysteresis (0.3V) rejects line noise in noisy chassis environments. |
| DOUT1, DOUT2 | RS-232 line output (cable side) | Deliver ±5.4V min swing into 3kΩ load; slew-rate-limited to meet FCC Class B emissions limits. |
| VCC, GND | Power and reference | Single-supply operation; requires local 0.1μF bypass capacitor between VCC and GND for stable charge-pump operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Grade 2 (−40°C to +85°C) certification enables use in automotive powertrain, chassis, and infotainment systems without additional qualification effort. |
| TIA/EIA-232-F compliance | Meets all electrical requirements including driver output voltage, receiver sensitivity, and timing parameters for interoperability with legacy industrial and automotive RS-232 equipment. |
| Dual-channel architecture | Simultaneous bidirectional communication on two independent RS-232 links - supports OBD-II diagnostics and secondary serial bus (e.g., GPS module) in one IC. |
| Low-power standby mode | 300μA quiescent current allows implementation of wake-on-RS-232 functionality in sleep-mode vehicle networks. |
| IEC 61000-4-2 ESD hardened | ±15kV contact discharge rating protects against ESD events during assembly, service, and field operation without external TVS diodes. |
Applications
| OBD-II Diagnostic Interface | Telematics Control Unit (TCU) |
|---|---|
Use Scenario: Bidirectional communication between vehicle ECU and handheld scan tool via standardized DB9 connector. IC Role / Device Role / Timing Role: RS-232 line driver/receiver translating UART signals to ±12V-compatible physical layer with ESD protection on exposed pins. Use Value: Enables reliable high-speed (250kbit/s) diagnostics in harsh electromagnetic environments with no external voltage converters or protection components. |
Use Scenario: Serial link between cellular modem and main processor for firmware updates and remote diagnostics over AT command set. IC Role / Device Role / Timing Role: Dual-channel transceiver handling simultaneous modem control (DIN1/ROUT1) and GPS NMEA data (DIN2/ROUT2) paths. Use Value: Reduces component count by consolidating two RS-232 interfaces into one AEC-Q100-qualified device, saving PCB area in compact TCUs. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Interfacing legacy RS-232 peripherals (e.g., seat memory controller, HVAC display) to modern 3.3V microcontroller. IC Role / Device Role / Timing Role: Logic-level shifter and voltage translator enabling 3.3V MCU to drive 5V-tolerant RS-232 receivers and accept their outputs. Use Value: Eliminates need for discrete level shifters and dual supplies, simplifying BCM design while meeting automotive reliability standards. |
Use Scenario: Connecting rear-seat entertainment system or Bluetooth audio adapter via RS-232 debug port for factory programming and service access. IC Role / Device Role / Timing Role: Isolated RS-232 interface with ±15kV ESD protection on externally accessible connectors to prevent damage during technician handling. Use Value: Ensures long-term field reliability of service ports exposed to frequent plugging/unplugging in dealership service bays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65C3232QPWRQ1 | Higher 1Mbit/s data rate; identical AEC-Q100 Grade 2 qualification and TSSOP-16 package. | Better suited for high-speed firmware update channels where 250kbit/s is insufficient. | Select when >250kbit/s throughput is required; otherwise MAX3232EIPWRQ1 offers lower cost and proven stability at standard diagnostic rates. |
| MAX3232IPWR | Industrial-grade (−40°C to +85°C), non-automotive qualified; same pinout and electrical specs except missing AEC-Q100 test documentation. | Limited to non-safety-critical aftermarket or industrial applications without automotive certification requirements. | Choose only for cost-sensitive non-automotive designs; MAX3232EIPWRQ1 is mandatory for OEM production programs requiring AEC-Q100 evidence. |
Compared with SN65C3232QPWRQ1 and MAX3232IPWR, the MAX3232EIPWRQ1 uniquely balances automotive qualification, 250kbit/s performance, and minimal external component count - making it optimal for cost-constrained, volume automotive serial interfaces where ultra-high speed or non-automotive use cases do not apply.
Availability
MAX3232EIPWRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, telematics control units, and OBD-II diagnostic interfaces requiring stable component supply across extended product lifecycles.
Supply support for MAX3232EIPWRQ1 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 for automotive, industrial, and consumer markets.
The MAX3232E-Q1 belongs to TI's automotive RS-232 transceiver family, designed specifically to replace legacy ±12V-powered interfaces with single-supply, ESD-hardened, AEC-Q100-compliant devices for modern vehicle electronic control units.
FAQ
What automotive qualification does the MAX3232EIPWRQ1 hold?
The MAX3232EIPWRQ1 is qualified to AEC-Q100 Grade 2 (−40°C to +85°C), with full test documentation covering stress testing, thermal cycling, and reliability validation required for automotive production. This qualification applies specifically to the MAX3232EIPWRQ1 part number and is verified in TI's official qualification report SLLS676B.
Can the MAX3232EIPWRQ1 operate from a 3.3V supply while interfacing with 5V logic inputs?
Yes, the MAX3232EIPWRQ1 accepts 5V logic-level inputs on DIN1 and DIN2 pins even when VCC = 3.3V, per its absolute maximum rating (VIH up to 5.5V) and electrical characteristics table. This eliminates external level shifters in mixed-voltage automotive subsystems, and is confirmed in Section 5.2 of the MAX3232EIPWRQ1 datasheet.
How many external capacitors does the MAX3232EIPWRQ1 require, and what values are specified?
The MAX3232EIPWRQ1 requires four 0.1μF ceramic capacitors (C1+, C1−, C2+, C2−) for charge-pump operation at 3.3V supply, as defined in Section 6.1 Typical Operating Circuit and Table 5.2 Recommended Operating Conditions. At 5V supply, capacitor values change to C1 = 0.047μF and C2–C4 = 0.33μF, but 0.1μF remains valid for most automotive 3.3V implementations.
What is the maximum data rate supported by the MAX3232EIPWRQ1, and under what conditions?
The MAX3232EIPWRQ1 supports up to 250kbit/s, measured with CL = 1000pF, RL = 3kΩ, and one DOUT switching, per Section 5.6 Switching Characteristics. This rate is guaranteed across the full −40°C to +85°C temperature range and applies to both channels independently, as validated in TI's production test flow for MAX3232EIPWRQ1.
Does the MAX3232EIPWRQ1 include built-in ESD protection, and what standard does it meet?
Yes, the MAX3232EIPWRQ1 provides ±15kV IEC 61000-4-2 ESD protection on all RS-232 pins (RIN1, RIN2, DOUT1, DOUT2, GND), as stated in the device description and Section 5.1 Absolute Maximum Ratings. This protection is integrated at the silicon level and requires no external TVS diodes for compliance with automotive ESD test plans.
MAX3232EIPWRQ1 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
MAX3232EIPWRQ1 FAQ
1.How can I place an order for MAX3232EIPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3232EIPWRQ1 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 MAX3232EIPWRQ1 reliable?
The price and inventory of MAX3232EIPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3232EIPWRQ1 is usually 5 days.
3.What payment methods are accepted for MAX3232EIPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3232EIPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3232EIPWRQ1?
MAX3232EIPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3232EIPWRQ1 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 MAX3232EIPWRQ1?
For technical support, including MAX3232EIPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3232EIPWRQ1 requirements.
6.How does Aetrix verify that MAX3232EIPWRQ1 is sourced from the original manufacturer or authorized distributors?
All MAX3232EIPWRQ1 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 MAX3232EIPWRQ1 meets industry standards.
7.What is the process for return or replacement of MAX3232EIPWRQ1?
All MAX3232EIPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with MAX3232EIPWRQ1, 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 MAX3232EIPWRQ1 part is unused and in its original packaging.
Return procedure for MAX3232EIPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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