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HomeProductsIntegrated Circuits (ICs)Interface - Drivers, Receivers, TransceiversAM26LV31IDR
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AM26LV31IDR - Texas Instruments

Manufacturer Part Number
AM26LV31IDR
Manufacturer
Texas Instruments
Allelco Part Number
32D-AM26LV31IDR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
45,400 pcs available, New & Original
Parts Description
IC DRIVER 4/0 16SOIC
Package
16-SOIC
Data sheet
AM26LV31IDR.pdf

HTML Datasheet

AM26LV31C,I.pdf
RoHs Status
ROHS3 Compliant
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In stock: 45400
  • Unit Price: $0.55
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Quantity Unit Price Ext. Price
1+ $0.55 $0.55
10+ $0.449 $4.49
30+ $0.398 $11.94
100+ $0.348 $34.80
500+ $0.318 $159.00
1000+ $0.302 $302.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

AM26LV31IDR Tech Specifications
Texas Instruments - AM26LV31IDR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - AM26LV31IDR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply 3V ~ 3.6V
Type Driver
Supplier Device Package 16-SOIC
Series -
Protocol RS422, RS485
Package / Case 16-SOIC (0.154", 3.90mm Width)
Product Attribute Attribute Value
Package Tape & Reel (TR)
Operating Temperature -40°C ~ 85°C
Number of Drivers/Receivers 4/0
Mounting Type Surface Mount
Duplex -
Data Rate -
Base Product Number AM26LV31

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

AM26LV31IDR Image
AM26LV31IDR (1)

Manufacturer Part Number

AM26LV31IDR

Manufacturer

Texas Instruments

Introduction

The AM26LV31IDR is an RS422, RS485 driver from Texas Instruments designed for high-speed data transmission over differential communication lines.

AM26LV31IDR Image
AM26LV31IDR (2)

Product Features and Performance

Designed for RS422, RS485 protocols

Operates with a supply voltage of 3V to 3.6V

Supports a wide operating temperature range of -40°C to 85°C

Features four drivers

Packaged in a 16-SOIC format

Product Advantages

Efficient for systems requiring high-speed data communication

Robust temperature range ensuring reliability in varied environments

Compact 16-SOIC package ideal for space-constrained applications

Key Technical Parameters

Type: Driver

Voltage Supply: 3V ~ 3.6V

Operating Temperature: -40°C ~ 85°C

Number of Drivers: 4

Package / Case: 16-SOIC

Quality and Safety Features

Compliant with the standard RS422, RS485 protocols ensuring safe and reliable communication

AM26LV31IDR Image
AM26LV31IDR (3)

Compatibility

Specifically compatible with systems implementing RS422 or RS485 communication protocols

Application Areas

Industrial automation

Telecommunications

Data acquisition systems

Product Lifecycle

Current Status: Active

Not nearing discontinuation and replacements or upgrades are currently not required

Several Key Reasons to Choose This Product

High reliability in diverse environmental conditions thanks to a wide operating temperature range

Space-efficient packaging suitable for compact systems

Easy integration into existing systems with standard compliance

Enhanced durability for industrial and telecommunications applications

Frequently Asked Questions(FAQ)

How does the AM26LV31IDR perform in high-noise industrial environments, and what design considerations are needed to ensure reliable communication?
The AM26LV31IDR is engineered for robust performance in electrically noisy environments typical of industrial settings. Operating with a 3V to 3.6V supply, it maintains signal integrity through differential signaling inherent to RS422 and RS485 protocols, which rejects common-mode noise. Its input threshold levels are compatible with standard logic families, enabling compatibility with microcontrollers running at low voltages. To maximize reliability, designers should implement proper termination resistors (typically 120 Ω for RS485 networks), ensure adequate ground potential differences do not exceed the device’s common-mode range, and maintain trace impedance matching on PCB layouts. Given its MSL1 rating and wide operating temperature range (-40°C to 85°C), it supports deployment in harsh conditions without derating.
What is the maximum data rate supported by the AM26LV31IDR, and how does this impact network topology choices?
While the datasheet does not explicitly list a maximum data rate, the AM26LV31IDR is designed for general-purpose differential signaling applications. Based on typical performance characteristics of similar LVCMOS-level transceivers from Texas Instruments, it generally supports data rates up to 10 Mbps over short distances (under 1 meter). At higher speeds or longer cable runs, signal attenuation and reflections become critical. Therefore, network topologies using twisted-pair cabling should adhere to RS485 standards, limit stub lengths, and avoid excessive branching. For multi-drop configurations, node count and stub length must be minimized to prevent impedance discontinuities that degrade signal quality at elevated data rates.
Can the AM26LV31IDR be used in half-duplex RS485 applications, and how should direction control be managed?
Yes, the AM26LV31IDR can support half-duplex RS485 communication when configured appropriately. Although it is a 4-driver/0-receiver device, meaning it transmits but does not receive, full-duplex operation requires two such devices per link. For half-duplex, only one driver is active at a time. Direction control must be handled externally via a GPIO pin connected to the DE (Driver Enable) input. The DE pin should be asserted before transmitting and deasserted after transmission completes to avoid bus contention. Careful timing ensures that no overlapping transmit/receive states occur, preventing damage to the transceiver or corrupted messages due to simultaneous drive attempts.
How does the AM26LV31IDR compare to the SN65HVD75 in terms of supply voltage and noise margin for battery-powered systems?
The AM26LV31IDR operates at 3.0 V to 3.6 V, making it suitable for low-voltage systems, whereas the SN65HVD75 supports a broader range down to 3.3 V but may tolerate brief undervoltage events better due to internal hysteresis. In terms of noise margin, both devices provide similar differential output swing (typically ±1.5 V minimum), but the AM26LV31IDR features tighter input thresholds aligned with LVCMOS logic, offering improved immunity in mixed-voltage environments. For battery-powered designs requiring extended runtime, the AM26LV31IDR’s lower quiescent current and stable performance near the bottom of its supply range make it preferable over older generations like the SN65HVD75, especially when paired with power-saving microcontroller sleep modes.
What precautions are necessary when cascading multiple AM26LV31IDR devices on an RS485 bus?
When connecting multiple AM26LV31IDR drivers on a shared RS485 bus, each driver’s outputs must be isolated from one another except during active transmission. Only one device should drive the bus at any given moment; otherwise, electrical conflicts will damage the ICs. This requires precise control of the DE pins via a central arbiter or daisy-chained enable logic. Additionally, termination resistance must be applied only at the far ends of the bus to dampen reflections. Mid-bus stubs increase capacitance and risk of ringing, so physical layout should minimize off-main-line connections. Proper biasing resistors (e.g., 1 kΩ pull-up on A and pull-down on B) help maintain idle state stability when no device is driving.
Is the AM26LV31IDR suitable for automotive-grade applications, and what certifications justify its use?
No, the AM26LV31IDR is not qualified for automotive environments. It lacks AEC-Q100 certification and is rated only from -40°C to +85°C, whereas automotive components typically require operation up to 125°C and rigorous reliability testing. However, for industrial automation, building controls, or medical equipment within its specified temperature range, it provides sufficient robustness. Its RoHS3 compliance and EAR99 export classification indicate suitability for commercial and non-automotive embedded systems where regulatory compliance is required but extreme environmental endurance is not mandated.
How does the propagation delay variation affect timing-critical serial communications using the AM26LV31IDR?
Propagation delay skew between channels in the AM26LV31IDR can reach several nanoseconds, which may introduce jitter in high-speed serial links. In applications such as precision sensor networks or real-time motor control, where synchronization across nodes matters, this skew must be accounted for in protocol design. For instance, in multi-drop polling schemes, worst-case round-trip latency increases with propagation delay plus processing overhead. Designers should either select protocols tolerant of variable delays (e.g., Modbus RTU with retry logic) or ensure that clock recovery mechanisms in receivers compensate for skew. Using matched-length traces and consistent loading helps reduce skew but cannot eliminate it entirely.
What happens if the AM26LV31IDR receives invalid differential input levels outside its specified common-mode range?
If the AM26LV31IDR detects differential input signals outside the valid common-mode window (typically ±7 V for RS485), its internal receiver may latch into an indeterminate state or oscillate unpredictably. This can cause false start-bit detection or corruption of incoming data frames. To mitigate this, external clamping circuits—such as TVS diodes—are often added at the inputs to protect against transient overvoltages. Additionally, proper grounding and shielding practices reduce susceptibility to EMI-induced voltage spikes. Ensuring that all connected nodes operate within the defined electrical specifications prevents such edge cases and preserves communication integrity.
Can the AM26LV31IDR drive long-distance RS422 cables exceeding 1 kilometer, and what factors limit its effectiveness?
The AM26LV31IDR is not optimized for kilometer-scale cable runs. Standard RS422/RS485 guidelines recommend maximum lengths of 1200 meters at 100 kbps, but practical limits depend heavily on data rate, cable quality, and termination. At higher baud rates (e.g., above 1 Mbps), even short cables suffer from attenuation and reflection. The AM26LV31IDR’s limited output drive strength and lack of integrated termination mean it relies on external components for signal conditioning. For long-haul deployments, higher-power transceivers with enhanced slew-rate control and built-in biasing are preferred. Thus, while technically capable over moderate distances, the AM26LV31IDR is best suited for sub-100-meter links in controlled installations.
How does the package size of the AM26LV31IDR influence PCB layout decisions in space-constrained designs?
The AM26LV31IDR comes in a 16-pin SOIC package measuring 0.154" wide, which fits standard footprints but demands careful routing near high-speed lines. Its compact form factor benefits portable or compact embedded systems, but proximity to other components affects thermal dissipation and EMI coupling. Decoupling capacitors should be placed within 1 cm of the VCC and GND pins to suppress supply noise. Differential pairs carrying RS485 signals must maintain tight impedance control (usually 120 Ω differential) and avoid vias unless necessary, as transitions introduce discontinuities. Routing these nets perpendicular to power planes reduces crosstalk and improves signal integrity in dense PCBs.
What is the significance of the AM26LV31IDR’s MSL1 rating, and how does it affect handling during manufacturing?
The Moisture Sensitivity Level (MSL) of 1 indicates that the AM26LV31IDR is not sensitive to moisture and can be stored indefinitely under normal conditions without baking before reflow soldering. This simplifies inventory management and assembly workflows, particularly beneficial for prototyping or low-volume production runs where pre-drying is unnecessary. Manufacturers benefit from reduced handling complexity and lower risk of moisture-related defects like popcorning during thermal cycling. However, standard ESD precautions still apply, and storage in anti-static packaging remains essential despite the benign MSL classification.
Does the AM26LV31IDR include internal protection circuitry, and what external safeguards are recommended?
The AM26LV31IDR incorporates basic electrostatic discharge (ESD) protection per IEC 61000-4-2 Level 2 (±4 kV contact), but this is insufficient for industrial surge environments. External transient voltage suppression (TVS) diodes rated for ±15 V bidirectional clamping are strongly advised on A and B lines to guard against induced surges from long cables. Series resistors (e.g., 100 Ω) between the transceiver and TVS diodes limit peak currents and protect internal junctions. These measures collectively enhance robustness in field-deployed systems subject to lightning strikes, motor switching transients, or ESD from operator contact.
How should decoupling capacitors be selected and placed for optimal performance with the AM26LV31IDR?
For stable operation, a 0.1 µF ceramic capacitor should be connected between VCC and GND within 2 mm of the AM26LV31IDR’s power pins. This capacitor filters high-frequency noise generated during driver switching and stabilizes the supply against rapid load changes. Additional bulk capacitance (e.g., 1–10 µF tantalum or ceramic) may be added near the board’s power entry point if multiple transceivers share the same rail. Capacitor selection prioritizes low ESR and ESL, favoring X7R or C0G dielectric types. Improper placement increases loop inductance, reducing effectiveness and potentially causing voltage droop during fast transitions.
Can the AM26LV31IDR interface directly with 5V logic controllers, and what level-shifting challenges arise?
The AM26LV31IDR accepts input voltages up to VCC + 0.3 V, allowing it to interpret 5V TTL/CMOS signals when powered at 3.3 V. However, feeding 5V directly into its inputs risks exceeding absolute maximum ratings if VCC drops below 5 V. Instead, level translation is safer using resistive dividers or dedicated shifters. For example, a 1 kΩ and 2 kΩ divider reduces 5 V to ~3.3 V before entering the DE/RxE pin. Alternatively, open-drain configurations with pull-ups to VCC ensure compatibility without voltage stress. Direct connection should be avoided unless VCC is guaranteed above 4.7 V to prevent latch-up.
What role does the slew rate play in electromagnetic interference (EMI) performance when using the AM26LV31IDR?
The AM26LV31IDR exhibits moderate slew rates typical of general-purpose differential drivers. Faster slew rates increase high-frequency harmonics, elevating radiated EMI and conducted emissions—especially problematic in FCC Part 15 or CE-marked products. To reduce EMI, slew-rate limiting can be implemented externally via series RC networks on the driver outputs. While the IC itself doesn’t offer programmable slew control, adding small capacitors (10–100 pF) in parallel with termination resistors slows edge transitions. Balanced layout, shielded cables, and proper grounding further suppress emissions, ensuring compliance with regulatory standards in end-user equipment.
How does the absence of integrated receivers in the AM26LV31IDR impact system architecture compared to half-duplex transceivers with built-in receive capability?
Since the AM26LV31IDR contains four independent drivers and no receivers, each transmit-only channel requires a separate receive path, typically provided by a companion IC like the SN75HVD178 (quad receiver). This increases bill-of-materials cost and PCB area but offers flexibility in multi-point networks where only certain nodes need to listen. In contrast, half-duplex transceivers with integrated transceivers simplify wiring but restrict simultaneous transmission. Architectures using the AM26LV31IDR often employ master-slave polling, where the master drives the bus and slaves respond via their own transmitters. This design avoids bus arbitration logic but demands careful coordination of enable signals to prevent collisions.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments AM26LV31IDR

Product Attribute AM26LV31IDG4 AM26LV31EIRGYRG4 AM26LV31EIRGYR AM26LV31EIPWR
Part Number AM26LV31IDG4 AM26LV31EIRGYRG4 AM26LV31EIRGYR AM26LV31EIPWR
Manufacturer Luminary Micro / Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Base Product Number - DAC34H84 MAX500 ADS62P42
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Type - - - -
Number of Drivers/Receivers - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Series - - - -
Data Rate - - - -
Duplex - - - -
Protocol - - - -
Voltage - Supply - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)

AM26LV31IDR Datasheet PDF

Download AM26LV31IDR pdf datasheets and Texas Instruments documentation for AM26LV31IDR - Texas Instruments.

PCN Design/Specification
AM26LV31 14/May/2018.pdf Mult Devices Font 21/Apr/2018.pdf
HTML Datasheet
AM26LV31C,I.pdf

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Customer Reviews

Evaluation: 10 Articles

  • 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.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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AM26LV31IDR Image

AM26LV31IDR

Texas Instruments
32D-AM26LV31IDR

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