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Texas Instruments AM26LV31EIDR
- Part No.:
- AM26LV31EIDR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AM26LV31EIDR.pdf
- Description:
- IC TRANSCEIVER 4/0 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,063
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Product details
Overview
AM26LV31EIDR from Texas Instruments is a low-voltage, high-speed quadruple RS-422 differential line driver with ±15kV IEC 61000-4-2 air-gap ESD protection, 3.3V single-supply operation, 8ns typical propagation delay, and ±30mA output drive capability - deployed in motor drives and industrial encoder interfaces for noise-immune serial communication over twisted-pair cables.
For engineers reviewing the AM26LV31EIDR datasheet, AM26LV31EIDR pinout, AM26LV31EIDR application, or AM26LV31EIDR equivalent, key selection criteria include its TIA/EIA-422-B compliance, 32MHz maximum switching rate, dual enable logic (active-high G and active-low G), 3-state outputs, and compatibility with 5V logic inputs on a 3.3V supply.
Technical Context
The AM26LV31EIDR implements four independent differential drivers, each with complementary enable control (G and G) enabling precise bus arbitration and hot-swap readiness. Its architecture supports balanced-bus transmission with controlled 5ns typical rise/fall times and 500ps typical pulse skew to maintain signal integrity at high data rates.
It operates across –40°C to +85°C, accepts 5V-tolerant logic inputs while powered from 3.3V, and features Ioff partial-power-down support and short-circuit protection - making it suitable for systems requiring robustness during power sequencing and fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 3.3V nominal (3.0–3.6V range); enables direct integration into modern low-voltage digital systems without level-shifting. |
| Max switching rate | 32MHz; supports high-speed serial links up to 64 Mbps in RS-422 point-to-point configurations. |
| Propagation delay | 8ns typical; ensures tight timing alignment across all four channels for synchronous multi-axis motion control. |
| Differential output voltage | 2.6V typical into 100Ω load; delivers sufficient swing for reliable detection margin over long twisted-pair runs. |
| ESD protection | ±15kV IEC 61000-4-2 air-gap; protects bus pins against field-induced electrostatic discharge in industrial environments. |
| Output drive current | ±30mA; drives standard 100Ω RS-422 loads with headroom for cable capacitance and termination variations. |
| Input voltage tolerance | Accepts 0–5.5V logic inputs on 3.3V supply; simplifies interface to legacy 5V microcontrollers or FPGAs. |
Pinout & Package
AM26LV31EIDR is packaged in a 16-pin SOIC (D) package measuring 9.9mm × 6mm, with industry-standard lead pitch and thermal performance (RθJA = 84.6°C/W). The device uses a single ground (Pin 8) and VCC (Pin 16), dual enable inputs (Pins 4 and 12), and four fully differential driver pairs (1A/1Y/1Z through 4A/4Y/4Z).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A | Logic input | Four independent TTL/CMOS-compatible data inputs accepting 0–5.5V signals on 3.3V supply. |
| 1Y–4Y and 1Z–4Z | Differential output | Eight dedicated RS-422 bus outputs (Y = non-inverting, Z = inverting); each pair forms one balanced driver channel. |
| G (Pin 4) | Active-high enable | Enables all four drivers when HIGH; used for centralized bus control in master-slave topologies. |
| G (Pin 12) | Active-low enable | Enables all four drivers when LOW; supports inverted control logic or OR-wired enable schemes. |
| VCC (Pin 16) | Power supply | 3.3V input with internal regulation; requires local 0.1µF ceramic bypass capacitor per TI layout guidelines. |
| GND (Pin 8) | Reference ground | Common return path for all drivers and logic; must be connected to system ground plane with low-inductance trace. |
Key Features
| Feature | Design Value |
|---|---|
| Quadruple 3-state RS-422 drivers | Four independent, high-current differential outputs with simultaneous enable/disable control for flexible bus topology management. |
| Dual-complement enable logic | G (active-high) and G (active-low) allow seamless integration with both positive- and negative-logic control systems without external inverters. |
| 5V-tolerant inputs on 3.3V supply | Eliminates need for external level translators when interfacing with 5V microcontrollers, CPLDs, or legacy logic families. |
| Ioff partial-power-down mode | Outputs enter high-impedance state when VCC = 0V, preventing back-driving of powered-down buses in modular systems. |
| Glitch-free power-up/down | Internal circuitry prevents false transitions during supply ramping - critical for encoder and servo applications where spurious pulses cause positioning errors. |
Applications
| Motor Drive Feedback Interface | Industrial Encoder Transmission |
|---|---|
Use Scenario: Transmitting quadrature A/B and index signals from rotary encoders to motion controllers over 10+ meter twisted-pair cables in CNC machines. IC Role / Device Role / Timing Role: Differential line driver converting single-ended encoder outputs to robust RS-422 signals with matched propagation delay across all four channels. Use Value: 500ps pulse skew and 8ns propagation delay ensure phase alignment between A/B signals, preserving encoder resolution and preventing position counting errors. | Use Scenario: Isolating and driving differential signals in space-constrained servo amplifier PCBs where ESD immunity and thermal reliability are mission-critical. IC Role / Device Role / Timing Role: High-speed bus driver providing ±15kV IEC ESD protection on RS-422 lines exposed to handling and environmental stress in avionics-grade assemblies. Use Value: ±15kV air-gap ESD rating eliminates need for external TVS diodes on bus lines, reducing BOM count and board area in compact motor control modules. |
| Factory Automation Bus Node | Wireless Base Station Backhaul |
Use Scenario: Driving differential clock and data lines between PLC I/O modules and remote sensor hubs in noisy factory-floor environments. IC Role / Device Role / Timing Role: Noise-immune line driver delivering clean, slew-controlled signals across unshielded or lightly shielded cabling subject to 60Hz EMI and relay switching transients. Use Value: Controlled 5ns rise/fall times suppress harmonic emissions while maintaining edge fidelity - meeting CISPR 11 Class A radiated emissions limits without added filtering. | Use Scenario: Interfacing FPGA-based baseband processors to RF front-end modules via differential control and status lines in 5G small-cell radios. IC Role / Device Role / Timing Role: Low-jitter, high-drive driver supporting 32MHz clock distribution and fast command-response signaling between digital and analog subsystems. Use Value: 32MHz max switching rate enables sub-31.25ns bit periods for real-time control loops, ensuring deterministic latency in time-sensitive fronthaul protocols. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-422 line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LVDS31DR | LVDS output standard (not RS-422); lower 350mV differential swing; no 5V-tolerant inputs. | Designed for point-to-point LVDS links, not multidrop RS-422 buses; lacks ±15kV ESD rating. | Select only if system uses LVDS receivers and requires lower power; not drop-in for RS-422 infrastructure. |
| THVD1450DR | RS-422/485 transceiver (integrated receiver); 14kV IEC ESD; 50Mbps max data rate; no dual-enable logic. | Supports bidirectional communication; includes fail-safe biasing; optimized for half-duplex networks rather than unidirectional encoder feeds. | Prefer when bidirectional diagnostics or bus monitoring are required; requires redesign of enable/control logic. |
Compared with SN65LVDS31DR and THVD1450DR, AM26LV31EIDR uniquely combines true RS-422 compliance, 5V-tolerant inputs, dual-enable control, and ±15kV air-gap ESD - making it the optimal choice for high-reliability, unidirectional encoder and motion-control interfaces where signal integrity and ruggedness are non-negotiable.
Availability
AM26LV31EIDR is available at Aetrix Electronics and suitable for motor drives, industrial encoder systems, and factory automation equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.
Supply support for AM26LV31EIDR 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 decades of expertise in industrial-grade interface ICs and high-reliability signal conditioning solutions.
The AM26LV31EIDR belongs to TI's precision RS-422/RS-485 interface portfolio, engineered specifically for noise-immune serial communication in harsh industrial, medical, and aerospace environments where ESD resilience and timing accuracy are critical.
FAQ
What is the operating temperature range for AM26LV31EIDR?
The AM26LV31EIDR is characterized for operation from –40°C to +85°C ambient temperature. This extended industrial range ensures reliable performance in motor drive cabinets, outdoor base stations, and factory-floor PLCs where thermal cycling and elevated ambient temperatures are common. The SOIC package's thermal metrics (RθJA = 84.6°C/W) support this rating under standard PCB layout conditions with adequate copper pour.
Does AM26LV31EIDR support 5V logic inputs when powered from 3.3V?
Yes, AM26LV31EIDR accepts logic input voltages up to 5.5V while operating from a 3.3V supply - confirmed in Section 5.3 (Recommended Operating Conditions) and Section 7.1 of the datasheet. This 5V-tolerance eliminates external level shifters when interfacing with legacy microcontrollers or FPGAs, and is implemented via robust input clamp structures that remain functional across the full –40°C to +85°C range.
How does the dual-enable logic (G and G) function on AM26LV31EIDR?
The AM26LV31EIDR provides two complementary enable inputs: G (Pin 4, active-high) and G (Pin 12, active-low). Outputs are enabled when either G = HIGH or G = LOW; they enter high-impedance state only when G = LOW and G = HIGH. This design allows flexible control using either polarity and supports wired-OR configurations - a feature explicitly documented in Table 7-1 and Section 7.3.1 of the AM26LV31EIDR datasheet.
What is the differential output voltage of AM26LV31EIDR into a 100Ω load?
The AM26LV31EIDR delivers 2.6V typical differential output voltage (|VOD2|) into a 100Ω load, as specified in Section 5.5 Electrical Characteristics. This value is measured under standard conditions (VCC = 3.3V, TA = 25°C) and ensures >200mV noise margin at the receiver end - exceeding the minimum 200mV requirement of TIA/EIA-422-B for reliable detection over long cable runs.
Is AM26LV31EIDR pin-compatible with other members of the AM26LV31 family?
Yes, AM26LV31EIDR shares identical pinout and functionality with all variants in the AM26LV31E family (e.g., AM26LV31EINSR, AM26LV31EIPWR), as confirmed by the unified Pin Configuration diagrams (Figures 4-1 and 4-2) and Table 4-1 in the datasheet. All variants use the same 16-pin SOIC/SOP/TSSOP/VQFN footprints and identical pin functions - enabling direct substitution across packages without PCB redesign.
AM26LV31EIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Driver
- Protocol:
- RS422, RS485
- Number of Drivers/Receivers:
- 4/0
- Duplex:
- -
- Receiver Hysteresis:
- -
- Data Rate:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
AM26LV31EIDR FAQ
1.How can I place an order for AM26LV31EIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for AM26LV31EIDR 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 AM26LV31EIDR reliable?
The price and inventory of AM26LV31EIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM26LV31EIDR is usually 5 days.
3.What payment methods are accepted for AM26LV31EIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM26LV31EIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM26LV31EIDR?
AM26LV31EIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM26LV31EIDR 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 AM26LV31EIDR?
For technical support, including AM26LV31EIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM26LV31EIDR requirements.
6.How does Aetrix verify that AM26LV31EIDR is sourced from the original manufacturer or authorized distributors?
All AM26LV31EIDR 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 AM26LV31EIDR meets industry standards.
7.What is the process for return or replacement of AM26LV31EIDR?
All AM26LV31EIDR units undergo pre-shipment inspection (PSI). If there is an issue with AM26LV31EIDR, 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 AM26LV31EIDR part is unused and in its original packaging.
Return procedure for AM26LV31EIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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