My Inquiry
My Account
Texas Instruments AM26LV31EIRGYR
- Part No.:
- AM26LV31EIRGYR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
AM26LV31EIRGYR.pdf
- Description:
- IC TRANSCEIVER 4/0 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,881
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AM26LV31EIRGYR from Texas Instruments is a low-voltage, high-speed quadruple differential line driver compliant with TIA/EIA-422-B and ITU V.11 standards. It operates from a single 3.3V supply, delivers ±30mA output drive, achieves 32MHz switching rates, and provides ±15kV IEC61000-4-2 air-gap ESD protection on RS-422 bus pins-used in industrial encoder interfaces and motor drive control loops.
For engineers reviewing the AM26LV31EIRGYR datasheet, AM26LV31EIRGYR pinout, AM26LV31EIRGYR application, or AM26LV31EIRGYR equivalent, key selection criteria include differential output voltage (2.6V typ into 100Ω), 8ns typical propagation delay, dual enable logic (active-high G and active-low G), 3-state outputs, and VQFN-16 thermal performance (RθJA = 48.4°C/W).
Technical Context
The AM26LV31EIRGYR integrates four independent RS-422 drivers with complementary enable inputs (G and G) enabling precise per-channel output control. Each driver features matched Y/Z differential outputs, accepts 5V-tolerant logic inputs at 3.3V supply, and supports partial-power-down via Ioff.
Its architecture targets balanced-bus transmission over twisted-pair cabling, delivering 2.6V differential swing into 100Ω loads while maintaining pulse skew ≤500ps and controlled 5ns rise/fall times-critical for noise-immune timing integrity in high-speed motion control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 3.3V nominal (3.0–3.6V range); enables direct integration with modern 3.3V logic and FPGA I/O banks. |
| Differential output voltage | 2.6V typical into 100Ω load; ensures robust signal margin against noise in long cable runs. |
| Propagation delay | 8ns typical (4–12ns max); supports deterministic timing in real-time servo feedback paths. |
| Pulse skew | 500ps typical (≤1.5ns max); minimizes inter-channel timing mismatch across all four drivers. |
| ESD protection | ±15kV IEC61000-4-2 air-gap on bus pins (2,3,5,6,10,11,13,14); eliminates need for external TVS diodes in harsh environments. |
| Output drive current | ±30mA continuous per channel; drives standard 100Ω RS-422 termination without external buffers. |
| Logic input tolerance | Accepts 0–5.5V inputs with 3.3V supply; simplifies interface to legacy 5V microcontrollers or level-shifting circuits. |
Pinout & Package
VQFN-16 package (RGY), 4mm × 3.5mm body with exposed thermal pad; optimized for thermal dissipation (RθJA = 48.4°C/W) and high-density PCB layouts in space-constrained industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A | Input | Logic data inputs for drivers 1–4; 5V-tolerant, compatible with mixed-voltage system interfacing. |
| 1Y/1Z, 2Y/2Z, 3Y/3Z, 4Y/4Z | Differential output | Complementary RS-422 outputs per channel; deliver 2.6V diff swing into 100Ω, with matched skew. |
| G (Pin 4) | Enable (active high) | Assert high to enable all four drivers; used for global bus activation in multi-drop systems. |
| G (Pin 12) | Enable (active low) | Assert low to enable all four drivers; supports inverted control signals or OR-gated enable schemes. |
| VCC (Pin 16) | Power supply | 3.3V supply input; requires local 0.1µF ceramic bypass capacitor for stable high-frequency operation. |
| GND (Pin 8) | Ground reference | Primary ground return; must be connected to low-impedance PCB ground plane to minimize EMI coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Quadruple 3-state RS-422 drivers | Four independent channels with simultaneous enable/disable control via dual G/G inputs-enables flexible bus arbitration and hot-swap capability. |
| ±15kV IEC61000-4-2 air-gap ESD | Integrated protection on all bus pins eliminates external ESD components, reducing BOM count and board area in medical and avionics designs. |
| 5V-tolerant logic inputs | Operates with 3.3V supply while accepting 0–5.5V input levels-removes need for discrete level shifters when interfacing to older controllers. |
| Ioff partial-power-down support | Outputs enter high-impedance state when VCC = 0V; prevents back-driving of powered-down systems during maintenance or fault conditions. |
| Controlled 5ns rise/fall times | Minimizes harmonic content and EMI radiation in EMC-sensitive applications such as wireless infrastructure base stations. |
Applications
| Encoder Interface | Motion Control Bus |
|---|---|
Use Scenario: High-resolution optical encoder signals (A/B/Z phases) transmitted over 10+ meter twisted-pair cables to servo drives. IC Role / Device Role / Timing Role: Differential line driver converting single-ended FPGA encoder outputs to robust RS-422 signals with precise edge alignment. Use Value: 500ps pulse skew and 8ns propagation delay ensure sub-microsecond phase accuracy across all four channels-critical for closed-loop position error correction. |
Use Scenario: Real-time command distribution from motion controller to multiple axis drives in CNC machinery. IC Role / Device Role / Timing Role: Quadruple driver providing isolated, noise-immune command streams (enable, direction, step, fault) over differential pairs. Use Value: ±30mA drive strength maintains signal integrity across 30m daisy-chained buses; ±15kV ESD withstand protects against factory floor transients. |
| Medical Imaging Data Link | Avionics Sensor Network |
Use Scenario: Transmitting time-critical image sensor data from CT/MRI detector modules to processing units through shielded harnesses. IC Role / Device Role / Timing Role: High-speed differential transmitter preserving signal fidelity and jitter performance in safety-critical diagnostic equipment. Use Value: 32MHz max operating frequency supports >25Mbps serial imaging data rates; 2.6V differential swing exceeds RS-422 minimum for reliable detection under EMI stress. |
Use Scenario: Interfacing inertial measurement units (IMUs) and GPS receivers to flight control computers in UAVs and satellites. IC Role / Device Role / Timing Role: Radiation-tolerant (qualified per -40°C to +85°C) differential driver ensuring deterministic latency in guidance loops. Use Value: Dual enable logic allows synchronized channel shutdown during safe-mode transitions; Ioff prevents power leakage during partial system resets. |
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. | Requires external termination and level translation for RS-422 compliance; unsuitable for legacy 5V controller interfaces. | Select only if system uses LVDS physical layer and full 5V compatibility is unnecessary. |
| THVD1450DR | RS-485 transceiver (driver + receiver); higher 5V supply requirement; integrated fail-safe biasing. | Supports multi-drop bus topologies but lacks independent 3-state control per channel; not optimized for encoder A/B/Z isolation. | Prefer when bidirectional communication or bus arbitration is required; avoid when unidirectional, low-skew quad-driver functionality is primary. |
Compared with SN65LVDS31DR and THVD1450DR, the AM26LV31EIRGYR uniquely combines RS-422 compliance, 5V-tolerant inputs, quad-channel 3-state control, and ±15kV air-gap ESD-all in a thermally efficient VQFN package-making it the optimal choice for precision encoder and motion control subsystems requiring deterministic timing and ruggedness.
Availability
AM26LV31EIRGYR is available at Aetrix Electronics and suitable for motor drives, medical imaging subsystems, and avionics sensor networks requiring stable component supply across extended product lifecycles.
Supply support for AM26LV31EIRGYR 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 company specializing in analog and embedded processing technologies, with leadership in industrial, automotive, and communications markets.
The AM26LV31EIRGYR belongs to TI's high-speed interface portfolio, designed specifically for noise-immune differential signaling in demanding real-time control applications-including factory automation, robotics, and aerospace systems.
FAQ
What is the maximum data rate supported by the AM26LV31EIRGYR?
The AM26LV31EIRGYR supports a maximum operating frequency of 32MHz, corresponding to a theoretical data rate of up to 64Mbps in NRZ encoding. This rating is validated under recommended operating conditions (3.3V supply, –40°C to +85°C), with 100Ω termination and controlled 5ns rise/fall times-ensuring reliable operation in high-speed encoder and motion control links. The AM26LV31EIRGYR datasheet specifies f(max) = 32MHz in Section 5.6.
Does the AM26LV31EIRGYR require external ESD protection on its bus pins?
No, the AM26LV31EIRGYR includes integrated ±15kV IEC61000-4-2 air-gap and ±8kV contact-discharge ESD protection on all RS-422 bus pins (2,3,5,6,10,11,13,14). This eliminates the need for external TVS diodes in most industrial and medical applications, reducing component count and PCB area. The AM26LV31EIRGYR ESD ratings are fully specified in Section 5.2 of the official TI datasheet.
Can the AM26LV31EIRGYR interface directly with 5V microcontrollers?
Yes, the AM26LV31EIRGYR accepts logic input voltages from 0V to 5.5V while operating from a 3.3V supply-enabling direct connection to 5V-tolerant GPIOs of legacy microcontrollers without level-shifting circuitry. Input thresholds are VIH ≥ 2V and VIL ≤ 0.8V, ensuring reliable recognition of 5V logic states. This capability is explicitly confirmed in Section 5.3 (Recommended Operating Conditions) of the AM26LV31EIRGYR datasheet.
How does the dual-enable logic (G and G) function on the AM26LV31EIRGYR?
The AM26LV31EIRGYR 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 3-state when G = LOW and G = HIGH. This design allows flexible control-e.g., global enable via G, or inverted logic enable via G-without external gates. The truth table is defined in Section 7.4 (Table 7-1) of the AM26LV31EIRGYR datasheet.
What thermal considerations apply to the AM26LV31EIRGYR in VQFN packaging?
The AM26LV31EIRGYR in RGY (VQFN-16) package has a junction-to-ambient thermal resistance (RθJA) of 48.4°C/W and junction-to-board (RθJB) of 24.6°C/W. Successful thermal design requires soldering the exposed thermal pad to a minimum 100mm² copper pour connected to internal ground planes. The AM26LV31EIRGYR thermal metrics are detailed in Section 5.4, and layout guidelines-including 0.1µF bypass capacitors near VCC-are provided in Section 8.4.
AM26LV31EIRGYR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- 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-VQFN (4x3.5)
AM26LV31EIRGYR FAQ
1.How can I place an order for AM26LV31EIRGYR through Aetrix?
Please submit a Request for Quotation (RFQ) for AM26LV31EIRGYR 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 AM26LV31EIRGYR reliable?
The price and inventory of AM26LV31EIRGYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM26LV31EIRGYR is usually 5 days.
3.What payment methods are accepted for AM26LV31EIRGYR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM26LV31EIRGYR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM26LV31EIRGYR?
AM26LV31EIRGYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM26LV31EIRGYR 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 AM26LV31EIRGYR?
For technical support, including AM26LV31EIRGYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM26LV31EIRGYR requirements.
6.How does Aetrix verify that AM26LV31EIRGYR is sourced from the original manufacturer or authorized distributors?
All AM26LV31EIRGYR 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 AM26LV31EIRGYR meets industry standards.
7.What is the process for return or replacement of AM26LV31EIRGYR?
All AM26LV31EIRGYR units undergo pre-shipment inspection (PSI). If there is an issue with AM26LV31EIRGYR, 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 AM26LV31EIRGYR part is unused and in its original packaging.
Return procedure for AM26LV31EIRGYR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AM26LV31EIRGYR Tags
-
ATA6561-GAQW-N
Microchip Technology
-
ATA6561-GBQW-N
Microchip Technology
-
AM26LS32ACDR
Texas Instruments
-
SP485CN-L/TR
MaxLinear, Inc.
-
SP485EN-L/TR
MaxLinear, Inc.
-
SP485EEN-L/TR
MaxLinear, Inc.
-
SP485ECN-L/TR
MaxLinear, Inc.
-
THVD1400DR
Texas Instruments
-
AM26C31IDR
Texas Instruments
-
TLIN1021ADRQ1
Texas Instruments
-
MAX232IDR
Texas Instruments
-
AM26C32IDR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
