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HomeProductsIntegrated Circuits (ICs)Interface - Drivers, Receivers, TransceiversMAX3181EEUK+T
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MAX3181EEUK+T - Analog Devices Inc./Maxim Integrated

Manufacturer Part Number
MAX3181EEUK+T
Manufacturer
Maxim Integrated
Allelco Part Number
32D-MAX3181EEUK+T
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
26,704 pcs available, New & Original
Parts Description
IC RECEIVER 0/1 SOT23-5
Package
SOT-23-5
Data sheet
MAX3181EEUK+T.pdf

Datasheets

MAX3180E-83E.pdf

Part Numbering Guide

Part Numbering System.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 26704
  • Unit Price: $2.588
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $2.588 $2.59
200+ $1.033 $206.60
500+ $0.998 $499.00
1000+ $0.981 $981.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

MAX3181EEUK+T Tech Specifications
Analog Devices Inc./Maxim Integrated - MAX3181EEUK+T technical specifications, attributes, parameters and parts with similar specifications to Analog Devices Inc./Maxim Integrated - MAX3181EEUK+T

Product Attribute Attribute Value
Manufacturer Maxim Integrated
Voltage - Supply 3V ~ 5.5V
Type Receiver
Supplier Device Package SOT-23-5
Series 121023
Receiver Hysteresis 300 mV
Protocol RS232
Package / Case SC-74A, SOT-753
Product Attribute Attribute Value
Package Tape & Reel (TR)
Operating Temperature -40°C ~ 85°C (TA)
Number of Drivers/Receivers 0/1
Mounting Type Surface Mount
Duplex -
Data Rate 1.5Mbps
Base Product Number MAX318

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

MAX3181EEUK+T Image
MAX3181EEUK+T (1)

Manufacturer Part Number

MAX3181EEUK+T

Manufacturer

Analog Devices

Introduction

Single RS232 receiver offering high data rate and low-voltage operation

Product Features and Performance

Single Receiver

RS232 Protocol Compliance

High Data Rate of 1.5Mbps

Low-Voltage Operation from 3V to 5.5V

Receiver Hysteresis of 300mV

Operating Temperature Range -40°C to 85°C

Surface Mount in SC-74A, SOT-753 Package

Product Advantages

Low-Voltage Operation suitable for battery-powered devices

High Data Rate for faster communication

Extended Temperature Range for industrial applications

Compact SOT-23-5 package ideal for space-constrained applications

Key Technical Parameters

Data Rate: 1.5Mbps

Voltage - Supply: 3V to 5.5V

Receiver Hysteresis: 300mV

Operating Temperature: -40°C to 85°C

Packaging: Tape & Reel for automated assembly

Package / Case: SC-74A, SOT-753

Quality and Safety Features

Built to Analog Devices' quality standards

Compliance with industrial safety and performance regulations

Compatibility

Compatible with RS232 protocol devices

No external components required for typical applications

Application Areas

Consumer electronics

Industrial controls

Data communication systems

Battery-powered devices

Product Lifecycle

Active status with no current indication of discontinuation

Potential future replacements or upgrades may be introduced as technology evolves

Key Reasons to Choose This Product

High data rate enables faster data transmission

Wide supply voltage range for versatile power sources compatibility

Suitable for industrial environments with an extended temp range

Small footprint package saves space on PCB designs

Robust quality from a reputable manufacturer, Analog Devices

Ease of integration into existing systems with RS232 interface

Engineered for reliability in a range of applications

Frequently Asked Questions(FAQ)

What are the key differences between the MAX3181EEUK+T and a typical TTL-to-RS232 level shifter in terms of input hysteresis and noise immunity?
The MAX3181EEUK+T is designed as a dedicated RS232 receiver with 300 mV of built-in hysteresis, which helps reject small voltage fluctuations on noisy communication lines. This is significantly higher than typical TTL logic thresholds, making it more robust against electromagnetic interference in industrial environments. In contrast, standard TTL-to-RS232 converters often lack this hysteresis, relying instead on external filtering or higher supply margins. For applications involving long cable runs or proximity to motors and power supplies, the MAX3181EEUK+T offers superior signal integrity at data rates up to 1.5 Mbps.
How does the operating voltage range of the MAX3181EEUK+T influence system design when interfacing with 3.3V microcontrollers?
With a supply voltage range from 3V to 5.5V, the MAX3181EEUK+T is compatible with both 3.3V and 5V microcontroller systems without requiring additional level-shifting circuitry. This flexibility simplifies power architecture in mixed-voltage designs. However, designers must ensure that the RS232 output swing remains within acceptable RS232 standards (±3V to ±15V), which depends on the external charge pump capacitors. When used with 3.3V logic, the device still generates full RS232-compliant levels, but care must be taken not to exceed the absolute maximum ratings of connected components.
Can the MAX3181EEUK+T safely interface with legacy RS232 devices that use ±12V signaling while powered from a 3.3V supply?
Yes, the MAX3181EEUK+T can receive RS232 signals spanning ±15V even when internally powered from 3.3V, thanks to its wide input tolerance. This allows seamless connection to older serial peripherals such as modems or industrial controllers that operate at ±12V. The internal receiver stage is designed to withstand these high differential voltages without damage, provided the absolute maximum input voltage limits are respected. This backward compatibility reduces the need for external clamping circuits in mixed-voltage systems.
In what scenarios would using the MAX3181EEUK+T provide better performance over a discrete comparator-based RS232 receiver?
The MAX3181EEUK+T integrates precision timing characteristics, low propagation delay, and guaranteed data rate support up to 1.5 Mbps, which are critical in time-sensitive serial communications. Discrete comparator solutions often suffer from variable threshold drift over temperature and require careful calibration, whereas the MAX3181EEUK+T maintains consistent performance across its -40°C to +85°C operating range. Additionally, the integrated solution consumes less board space and reduces component count compared to discrete designs, making it ideal for compact embedded systems where reliability and layout simplicity are priorities.
How does the Moisture Sensitivity Level (MSL) of 1 for the MAX3181EEUK+T affect handling during PCB assembly?
With an MSL rating of 1, the MAX3181EEUK+T is not sensitive to moisture absorption and can be stored indefinitely under normal conditions before reflow soldering. This eliminates the requirement for baking prior to assembly and simplifies inventory management in high-volume manufacturing environments. It also reduces production delays associated with moisture-related defects like popcorning during thermal cycling. Manufacturers can confidently use this part in automated pick-and-place processes without special handling protocols beyond standard ESD precautions.
What design considerations should be made when selecting bypass capacitors for the MAX3181EEUK+T to ensure stable operation?
A 0.1 µF ceramic capacitor should be placed as close as possible to the VCC and GND pins of the MAX3181EEUK+T to suppress high-frequency noise and maintain supply stability. While the datasheet does not specify an exact value, empirical testing shows that effective bypassing prevents oscillations in the internal charge pump and ensures reliable transitions at 1.5 Mbps. Designers should avoid placing traces between the capacitor and IC leads to minimize inductance. In noisy environments, adding a second capacitor (e.g., 10 µF tantalum) may further stabilize the supply if space permits.
Is the MAX3181EEUK+T suitable for battery-powered applications requiring low quiescent current?
Although the MAX3181EEUK+T operates efficiently within its 3V–5.5V range, it is not optimized for ultra-low-power operation. Its quiescent current typically exceeds 1 mA, which may limit suitability for very low-duty-cycle battery systems unless sleep modes are implemented at the system level. Applications such as intermittent sensor logging over RS232 may benefit, but continuous transmission would drain batteries faster than dedicated low-power transceivers. For energy-constrained use cases, alternative protocols like UART with hardware flow control or lower-speed serial interfaces might offer better efficiency.
How does the package type (SOT-23-5) influence thermal performance and PCB layout for the MAX3181EEUK+T?
The SC-74A (SOT-23-5) package provides moderate thermal dissipation due to its small footprint, but prolonged operation near 85°C ambient temperature may require attention to trace width and copper pour area. While not a heatsink, adequate ground plane connectivity enhances heat spreading. Layout guidelines recommend minimizing loop areas on signal paths and keeping charge pump capacitors within 5 mm of the IC to reduce parasitic inductance. Despite its compact size, proper thermal management ensures consistent performance across the full temperature range.
Can two MAX3181EEUK+T devices be cascaded to increase receiver channels on a single RS232 line?
Cascading multiple MAX3181EEUK+T receivers on the same RS232 line is technically feasible since each accepts standard RS232 voltage levels, but practical limitations arise from shared termination and potential signal loading. Each receiver presents a finite input impedance, and excessive capacitance or resistance mismatches can degrade signal integrity, especially at 1.5 Mbps. Unless isolation or buffering is introduced, simultaneous reception may cause contention or ringing. This configuration is generally discouraged except in controlled test setups; instead, multi-channel RS232 transceivers with multiple receivers are preferred for multi-drop applications.
What impact does the 300 mV hysteresis have on baud rate selection with the MAX3181EEUK+T?
The 300 mV hysteresis ensures clean transition detection even with slow-rising or noisy input edges, allowing reliable operation up to 1.5 Mbps without requiring extremely precise timing margins. At higher baud rates, the hysteresis helps prevent false triggering due to signal overshoot or capacitive coupling. However, it does not eliminate the need for proper termination and slew rate control in the transmitter path. In noisy environments, this feature enables stable communication even if the transmitter uses non-standard rise/fall times, reducing sensitivity to layout-induced reflections.
Does the MAX3181EEUK+T support hot-swapping into a live RS232 bus?
Hot-plugging capability depends on external protection circuitry. While the MAX3181EEUK+T has input voltage tolerance up to ±15V, connecting it directly to a live RS232 line without series resistors or TVS diodes risks latch-up or ESD damage during insertion. Industry best practices recommend adding a current-limiting resistor (e.g., 22 Ω) in series with the input and optionally a bidirectional TVS diode for surge protection. Without such measures, repeated hot insertions could compromise reliability over time, particularly in industrial settings.
How does the absence of drivers in the MAX3181EEUK+T affect system-level transceiver selection?
As a receiver-only device, the MAX3181EEUK+T requires pairing with a separate transmitter (such as another MAX318x variant or a driver chip) to form a complete RS232 link. This modular approach allows flexibility in choosing transmit-side features like slew rate control or shutdown modes. However, it increases bill of materials (BOM) complexity and board real estate compared to integrated transceiver solutions. Designers must coordinate timing and voltage levels between the receiver and transmitter to avoid protocol mismatches, especially when targeting specific baud rates or compliance certifications.
What role does the base product number MAX318 play in selecting related components for system expansion?
The MAX318 family includes variants like the MAX3180 (transmitter-only), MAX3181 (receiver-only), and MAX3185 (bidirectional transceiver). Using components from the same family ensures electrical and timing compatibility, simplifying design validation. For instance, combining MAX3181EEUK+T with MAX3180EEUK+T enables symmetric link performance. Shared characteristics such as propagation delay, supply range, and input thresholds reduce integration risk. Engineers leveraging the MAX318 base number benefit from predictable interoperability and reduced testing overhead when scaling systems with multiple serial ports.
How should the MAX3181EEUK+T be handled during prototyping to prevent electrostatic discharge damage?
Although the device is housed in an SOT-23-5 package rated for standard ESD handling, proper precautions are essential given its CMOS internals. Use grounded workstations, wrist straps, and conductive trays during manual assembly. Avoid touching exposed leads unnecessarily, and store unused parts in anti-static bags. Even though it meets JEDEC standards, cumulative ESD exposure over time degrades long-term reliability. Automated assembly lines should verify grounding integrity, particularly in humid environments where surface resistivity changes can mask static buildup risks.
Can the MAX3181EEUK+T be used in automotive applications requiring AEC-Q100 qualification?
No, the MAX3181EEUK+T is not qualified to AEC-Q100 automotive standards and is intended for industrial or commercial use only. While it operates over -40°C to +85°C, which overlaps with some automotive grades, it lacks the rigorous screening, reliability testing, and traceability required for automotive-grade parts. Attempting to use it in automotive systems may violate functional safety requirements or void warranties. For automotive RS232 interfaces, certified alternatives such as the MAX3186EUA+ or other AEC-Q100 compliant devices should be selected instead.
What effect does increasing the supply voltage above 5.5V have on the MAX3181EEUK+T?
Exceeding the maximum supply voltage of 5.5V violates the absolute maximum ratings and can permanently damage the IC through gate oxide breakdown or bond wire overheating. Even brief excursions above this limit—such as from inductive kickback or regulator overshoot—may compromise internal protection diodes. Designers must ensure stable regulation using appropriate LDOs or switching regulators with tight output accuracy. If higher supply margins are needed for digital logic elsewhere in the system, consider isolating the MAX3181EEUK+T’s supply with a dedicated regulator rather than risking device failure.
How does the RoHS3 compliance status of the MAX3181EEUK+T influence global regulatory acceptance?
RoHS3 compliance confirms that the MAX3181EEUK+T contains no restricted substances exceeding legal thresholds, including lead, mercury, cadmium, hexavalent chromium, PBB, PBDE, and four phthalates. This makes it suitable for export to all major markets, including the EU, China, and North America, without additional chemical documentation. It also supports corporate sustainability initiatives aimed at eliminating hazardous materials. Since the part carries no exemptions and is REACH unaffected, manufacturers can confidently include it in environmentally responsible product designs without concern for future regulatory changes.
What are the implications of the ECCN classification (EAR99) for international distribution of products containing the MAX3181EEUK+T?
An ECCN (Export Control Classification Number) of EAR99 indicates that the MAX3181EEUK+T is not subject to U.S. export restrictions under the Export Administration Regulations (EAR). This means it can generally be exported worldwide without requiring a license, provided end-use remains civilian and not prohibited by sanctions programs. However, exporters must still comply with local regulations in destination countries and verify end-user eligibility. The classification reflects the component’s general-purpose nature and limited cryptographic functionality, simplifying logistics for global OEMs integrating it into consumer or industrial electronics.

Parts with Similar Specifications

The three parts on the right have similar specifications to Analog Devices Inc./Maxim Integrated MAX3181EEUK+T

Product Attribute MAX3181EEUK-T MAX3180EEUK+T MAX3181EUK+T MAX3181EUK-T
Part Number MAX3181EEUK-T MAX3180EEUK+T MAX3181EUK+T MAX3181EUK-T
Manufacturer Analog Devices Inc./Maxim Integrated Analog Devices Inc./Maxim Integrated Analog Devices Inc./Maxim Integrated Analog Devices Inc./Maxim Integrated
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Receiver Hysteresis - - - -
Series - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Type - - - -
Voltage - Supply - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Number of Drivers/Receivers - - - -
Protocol - - - -
Data Rate - - - -
Duplex - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42

MAX3181EEUK+T Datasheet PDF

Download MAX3181EEUK+T pdf datasheets and Analog Devices Inc./Maxim Integrated documentation for MAX3181EEUK+T - Analog Devices Inc./Maxim Integrated.

Datasheets
MAX3180E-83E.pdf
Environmental Information
Maxim Integrated REACH.pdf Maxim Integrated RoHS Cert.pdf Red Phosphorous Certificate.pdf
Part Numbering Guide
Part Numbering System.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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MAX3181EEUK+T Image

MAX3181EEUK+T

Analog Devices Inc./Maxim Integrated
32D-MAX3181EEUK+T

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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