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Texas Instruments MAX3232ECPWR
- Part No.:
- MAX3232ECPWR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX3232ECPWR.pdf
- Description:
- IC TRANSCEIVER FULL 2/2 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:35,834
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Product details
Overview
MAX3232ECPWR from Texas Instruments is a 3-V to 5.5-V dual-channel RS-232 line driver and receiver IC with ±15-kV IEC 61000-4-2 ESD protection, compliant with TIA/EIA-232-F and ITU V.28 standards, operating up to 250 kbit/s, and consuming only 300 μA typical supply current. It integrates a dual charge-pump circuit requiring four 0.1-μF external capacitors and supports 3.3-V logic inputs when powered from a 3.3-V supply - used in industrial PC serial interfaces.
For engineers reviewing the MAX3232ECPWR datasheet, MAX3232ECPWR pinout, MAX3232ECPWR application, or MAX3232ECPWR equivalent, key selection criteria include its TSSOP-16 package, 0°C to 70°C temperature grade, ±15-kV IEC ESD rating on RIN/DOUT pins, 250 kbit/s max data rate, and compatibility with single-supply 3.3-V/5-V systems without level-shifting circuitry.
Technical Context
The MAX3232ECPWR implements a dual charge-pump architecture generating ±5.4 V internal rails from a single 3.3-V or 5-V supply, enabling true RS-232 voltage levels (±5 V) without external high-voltage sources. Its drivers deliver ±5.4 V output swing into 3-kΩ loads, while receivers accept ±25 V input ranges and provide TTL/CMOS-compatible outputs with 0.4 V low-level and VCC–0.6 V high-level thresholds.
Each channel operates independently: DIN1/DIN2 accept logic-level inputs and drive DOUT1/DOUT2 to RS-232 levels; RIN1/RIN2 accept RS-232 signals and produce ROUT1/ROUT2 logic outputs. The device remains safe during VCC loss, allowing hot-plug RS-232 connection without latch-up or damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 5.5 V - enables direct interface with 3.3-V or 5-V microcontrollers without external regulators |
| Max Data Rate | 250 kbit/s - supports full-speed legacy RS-232 communication including modem control and point-to-point links |
| ESD Protection | ±15 kV IEC 61000-4-2 air-gap, ±8 kV contact - eliminates need for external TVS diodes on RS-232 port pins |
| Supply Current (typ) | 300 μA - allows battery-powered operation for >1 year in low-duty-cycle serial monitoring applications |
| Driver Output Swing | ±5.4 V into 3-kΩ load - meets TIA/EIA-232-F minimum ±5-V requirement for reliable long-cable transmission |
| Receiver Input Range | ±25 V - tolerates noise, ground offsets, and cable-induced transients in industrial wiring environments |
| Logic Compatibility | Accepts 5-V-tolerant inputs at 3.3-V VCC - simplifies integration with mixed-voltage UART peripherals |
Pinout & Package
TSSOP-16 (PW) package, 5.00 mm × 4.40 mm body size, 0.65 mm lead pitch, RoHS-compliant NIPDAU/SN finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1+ | Charge-pump capacitor positive terminal | Connects to positive lead of 0.1-μF flying capacitor; critical for stable +VCC charge-pump operation |
| V+ | Positive charge-pump output | Internal +5.4 V rail for driver stage; not user-accessible - must connect C1− and C2+ externally |
| C1− | Charge-pump capacitor negative terminal | Completes first charge-pump stage; ties between C1+ and C2+ to generate boosted voltage |
| C2+ | Second flying capacitor positive terminal | Feeds inverted charge-pump stage; works with C2− to generate –VCC rail |
| C2− | Second flying capacitor negative terminal | Reference node for negative charge-pump output; connects to V− pin |
| V− | Negative charge-pump output | Internal –5.4 V rail for driver stage; supplies negative swing capability without external supply |
| DOUT2 | RS-232 driver output (channel 2) | Drives RIN pin of remote RS-232 device; swings ±5.4 V, slew-rate limited to ≤30 V/μs |
| RIN2 | RS-232 receiver input (channel 2) | Accepts ±25 V RS-232 signal; includes 5-kΩ internal termination and hysteresis for noise immunity |
| ROUT2 | Logic-level receiver output (channel 2) | Delivers TTL/CMOS-compatible signal to local UART; VOH ≥ VCC–0.6 V, VOL ≤ 0.4 V |
| DIN2 | Logic-level driver input (channel 2) | Accepts 0–VCC logic input; VIH ≥ 2.0 V at 3.3 V, ≥2.4 V at 5 V; IIL/IIL < ±1 μA |
| DIN1 | Logic-level driver input (channel 1) | Independent input for first RS-232 channel; identical electrical specs to DIN2 |
| ROUT1 | Logic-level receiver output (channel 1) | Independent output for first RS-232 channel; matches ROUT2 timing and voltage specs |
| RIN1 | RS-232 receiver input (channel 1) | Identical to RIN2; supports open-wire detection (high output on open input) |
| DOUT1 | RS-232 driver output (channel 1) | Identical to DOUT2; provides full ±5.4 V swing with short-circuit protection up to ±60 mA |
| GND | Power and signal reference | Common return for all internal circuits; must be low-impedance connection to system ground plane |
| VCC | Primary power supply input | Single 3.3-V or 5-V source powering entire IC; requires 0.1-μF bypass capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| Dual RS-232 transceiver | Two independent driver/receiver pairs enable full-duplex serial communication without multiplexing or timing constraints |
| Integrated charge-pump | Eliminates need for ±12-V supplies; generates required RS-232 voltage levels using only four 0.1-μF ceramic capacitors |
| IEC 61000-4-2 ESD protection | ±15-kV air-gap and ±8-kV contact discharge rating on RIN/DOUT pins reduces board-level protection component count by ≥3 devices |
| 3.3-V logic compatibility | Accepts 5-V-tolerant inputs at 3.3-V VCC - enables direct connection to 3.3-V UARTs without level shifters or resistive dividers |
| Low-power shutdown mode | ICC drops to <1 μA when VCC = 0 V - permits safe hot-plug operation and prevents backfeeding into unpowered systems |
| Robust receiver input | ±25 V common-mode range and 0.3 V hysteresis prevent false triggering from EMI, ground bounce, or cable reflections |
Applications
| Industrial PC Serial Interface | Point-of-Sale Terminal |
|---|---|
Use Scenario: Connecting embedded controller UART to DB9 RS-232 port in factory-floor IPCs exposed to ESD and ground noise. IC Role / Device Role / Timing Role: Translates 3.3-V UART signals to ±5-V RS-232 levels while providing ±15-kV IEC ESD protection on port pins. Use Value: Eliminates external ESD diodes and dual-supply generation, reducing BOM cost by $0.18 and PCB area by 12 mm² per port. |
Use Scenario: Integrating barcode scanner or receipt printer via RS-232 in compact retail terminals powered by 3.3-V SMPS. IC Role / Device Role / Timing Role: Bidirectional level shifter and line driver/receiver supporting 115.2 kbit/s polling protocols with <300 ns propagation delay. Use Value: Enables single-supply 3.3-V design with guaranteed 250-kbit/s margin, avoiding 5-V rail and associated filtering components. |
| Medical Diagnostic Equipment | Programmable Logic Controller (PLC) |
Use Scenario: Isolating UART communication between microcontroller and external RS-232-configurable sensor module in Class II medical devices. IC Role / Device Role / Timing Role: Provides galvanically isolated RS-232 interface when paired with optocouplers; handles ±25 V input transients from long cables. Use Value: Meets IEC 60601-1 creepage/clearance requirements via compact TSSOP-16 footprint and integrated ESD protection. |
Use Scenario: Interfacing PLC CPU module to legacy HMI panels using RS-232 in harsh industrial environments with high EMI. IC Role / Device Role / Timing Role: Robust physical layer transceiver with 5-kΩ receiver termination and 30-V/μs slew-rate limiting to reduce radiated emissions. Use Value: Sustains error-free communication at 19.2 kbit/s over 15 m unshielded cable without external termination or ferrites. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-232 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65C3232E | Same pinout, identical electrical specs, but rated for –40°C to +85°C industrial temp range | Required for extended-temperature deployments (e.g., outdoor kiosks, automotive test gear) | Select SN65C3232E when ambient operating temperature exceeds 70°C |
| MAX3232CDR | SOIC-16 package (9.9 mm × 3.91 mm), same electrical performance, 0°C to 70°C grade | Suitable where TSSOP-16 footprint is incompatible with existing PCB layout or reflow profile | Choose MAX3232CDR for through-hole or larger-pitch assembly processes |
Compared with MAX3232ECPWR, SN65C3232E extends thermal reliability for wide-temperature applications, while MAX3232CDR trades miniaturization for mechanical robustness and legacy assembly compatibility - both retain identical RS-232 functionality and ESD protection.
Availability
MAX3232ECPWR is available at Aetrix Electronics and suitable for industrial PCs, point-of-sale terminals, and programmable logic controllers requiring stable component supply with guaranteed long-term sourcing.
Supply support for MAX3232ECPWR 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 industrial, automotive, and communications markets.
The MAX3232E product line delivers robust, single-supply RS-232 interface solutions for space-constrained, low-power, and ESD-prone applications - designed specifically for industrial automation, medical instrumentation, and embedded computing.
FAQ
What is the operating temperature range for MAX3232ECPWR?
The MAX3232ECPWR is specified for 0°C to +70°C ambient operation, as confirmed in the TI orderable addendum and Recommended Operating Conditions table. This commercial-grade rating makes it suitable for indoor industrial PCs, POS terminals, and office equipment - but not for under-hood automotive or outdoor telecom applications requiring extended temperature support. Always verify junction temperature rise under actual load conditions using RθJA = 108.2°C/W.
Does MAX3232ECPWR require external voltage supplies beyond VCC?
No, MAX3232ECPWR does not require external ±12-V or ±5-V supplies. Its integrated dual charge-pump circuit generates the necessary ±5.4-V RS-232 driver rails from a single 3.3-V or 5-V VCC input, using only four 0.1-μF external capacitors. This eliminates the need for additional DC-DC converters or linear regulators, simplifying power architecture and reducing bill-of-materials cost.
Can MAX3232ECPWR interface directly with a 3.3-V microcontroller UART?
Yes, MAX3232ECPWR accepts 3.3-V logic-level inputs on DIN1 and DIN2 pins when powered from a 3.3-V VCC supply, and produces TTL/CMOS-compatible outputs on ROUT1 and ROUT2. Its VIH threshold is 2.0 V (min) at 3.3-V VCC, ensuring reliable recognition of standard 3.3-V logic highs without level shifting - verified in Section 6.4 of the TI datasheet.
What capacitor values are required for MAX3232ECPWR at 3.3-V operation?
For 3.3-V ±0.3-V operation, MAX3232ECPWR requires four 0.1-μF ceramic capacitors: C1 (between C1+ and C1−), C2 (between C2+ and C2−), C3 (between V+ and GND), and C4 (between V− and GND). These values are specified in Table 9-1 of the TI datasheet and validated for 250-kbit/s operation with minimal EMI and stable charge-pump regulation.
Is MAX3232ECPWR pin-compatible with older MAX3232 variants?
Yes, MAX3232ECPWR is pin-compatible with all MAX3232E family members in TSSOP-16 (PW) package, including MAX3232EIPWR and MAX3232ECPWRG4.A. Pin functions, spacing, and thermal pad configuration match exactly - enabling drop-in replacement in existing designs. However, temperature grade (0°C–70°C vs –40°C–85°C) and ESD certification details must be verified per application requirements.
MAX3232ECPWR 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
MAX3232ECPWR FAQ
1.How can I place an order for MAX3232ECPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3232ECPWR 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 MAX3232ECPWR reliable?
The price and inventory of MAX3232ECPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3232ECPWR is usually 5 days.
3.What payment methods are accepted for MAX3232ECPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3232ECPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3232ECPWR?
MAX3232ECPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3232ECPWR 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 MAX3232ECPWR?
For technical support, including MAX3232ECPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3232ECPWR requirements.
6.How does Aetrix verify that MAX3232ECPWR is sourced from the original manufacturer or authorized distributors?
All MAX3232ECPWR 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 MAX3232ECPWR meets industry standards.
7.What is the process for return or replacement of MAX3232ECPWR?
All MAX3232ECPWR units undergo pre-shipment inspection (PSI). If there is an issue with MAX3232ECPWR, 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 MAX3232ECPWR part is unused and in its original packaging.
Return procedure for MAX3232ECPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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