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Texas Instruments AM26LS32AIDR
- Part No.:
- AM26LS32AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AM26LS32AIDR.pdf
- Description:
- IC TRANSCEIVER 0/4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,512
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Product details
Overview
AM26LS32AIDR from Texas Instruments is a quadruple differential line receiver compliant with ANSI TIA/EIA-422-B, TIA/EIA-423-B, and ITU V.10/V.11 standards. It operates from a single 5-V supply, provides ±7-V common-mode input range with ±200-mV sensitivity, features 3-state outputs, and supports fail-safe operation with open inputs. It is used in industrial RS-422 bus receivers for factory automation and motor drive control systems.
For engineers reviewing the AM26LS32AIDR datasheet, AM26LS32AIDR pinout, AM26LS32AIDR application, or AM26LS32AIDR equivalent, this page delivers verified technical context, package-specific pin functions, real-world interface roles, and validated alternative options for balanced differential data reception in harsh environments.
Technical Context
The AM26LS32AIDR implements four independent RS-422-compliant differential receivers with complementary enable inputs (G and G) supporting both active-high and active-low configuration. Its input stage includes hysteresis (50 mV typical) and high input impedance (≥12 kΩ), reducing bus loading while maintaining noise immunity.
Each receiver outputs TTL-compatible logic levels with 3-state capability, enabling direct connection to shared data buses. The device uses low-power Schottky circuitry and is characterized for operation from –40°C to +85°C - matching the industrial temperature grade indicated by the "I" suffix in AM26LS32AIDR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - ensures compatibility with standard 5-V TTL/CMOS logic rails and stable operation under typical industrial power rail tolerances. |
| Common-Mode Input Range | ±7 V - enables reliable reception across long cables with ground potential differences up to 14 V between transmitter and receiver. |
| Differential Sensitivity | ±200 mV - guarantees valid logic decision even with degraded signal integrity due to cable loss or noise coupling. |
| Input Hysteresis | 50 mV typical - suppresses output oscillation on slow or noisy differential inputs, improving robustness in electrically noisy factory environments. |
| Propagation Delay | 20–35 ns - supports data rates up to ~10 Mbps in point-to-point configurations without timing closure issues. |
| Output Drive | 8 mA sink / –440 µA source - sufficient to drive multiple TTL loads or feed into microcontroller GPIOs without external buffering. |
| Fail-Safe Behavior | Outputs high when inputs are open - prevents undefined logic states during cable disconnect or transmitter fault conditions. |
Pinout & Package
AM26LS32AIDR is supplied in a 16-pin SOIC (D) package measuring 9.9 mm × 6.0 mm, RoHS-compliant with NiPdAu lead finish and moisture sensitivity level (MSL) Level-1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 1B | Differential input pair (Ch 1) | Noninverting (1A) and inverting (1B) inputs for first receiver; accepts RS-422 differential signals with ±7-V common-mode tolerance. |
| 1Y | Logic output (Ch 1) | TTL-compatible output; high-impedance when disabled via G/G controls - enables bus sharing without contention. |
| 2A, 2B | Differential input pair (Ch 2) | Second independent RS-422 receiver channel, electrically isolated from others except shared supply and enables. |
| 2Y | Logic output (Ch 2) | Active-high TTL output; state determined solely by differential voltage on 2A–2B and enable status. |
| 3A, 3B | Differential input pair (Ch 3) | Third receiver channel; identical electrical specs to Ch 1/2 - supports multi-drop or parallel bus monitoring. |
| 3Y | Logic output (Ch 3) | 3-state output controlled by common enable logic - allows selective activation of individual channels. |
| 4A, 4B | Differential input pair (Ch 4) | Fourth receiver; enables full quad-channel monitoring of separate differential links or redundant paths. |
| 4Y | Logic output (Ch 4) | Independent output with same drive strength and voltage thresholds as other Y pins. |
| G, G | Complementary enable inputs | Active-high (G) and active-low (G) enables - either can activate all four receivers; simplifies interface to diverse controller logic families. |
| VCC | Positive supply | 5-V nominal power rail; requires local 0.1-µF ceramic bypass capacitor per TI layout guidelines. |
| GND | Ground reference | Return path for all internal circuitry; must be connected to system ground plane with low-inductance path. |
Key Features
| Feature | Design Value |
|---|---|
| RS-422/RS-485 compliance | Meets ANSI TIA/EIA-422-B and ITU V.10/V.11 - ensures interoperability with standard industrial transceivers and cabling infrastructure. |
| Fail-safe open-input design | Outputs default high when A/B inputs float - eliminates need for external pull-up resistors and prevents undefined logic states during cable faults. |
| High input impedance | ≥12 kΩ - minimizes loading on differential bus, allowing more receivers per segment without violating RS-422 stub or load limits. |
| 3-state outputs with dual-enable logic | Single G or G pin can enable all four outputs - simplifies control wiring and supports flexible bus arbitration schemes. |
| Industrial temperature range | –40°C to +85°C - qualified for deployment in factory floors, motor drives, and outdoor smart grid equipment without derating. |
Applications
| Factory Automation | AC & Servo Motor Drives |
|---|---|
|
Use Scenario: Receiving position feedback and command signals over twisted-pair cabling between PLCs and distributed I/O modules in high-noise manufacturing cells. IC Role / Device Role / Timing Role: Differential line receiver converting RS-422 bus signals into clean TTL-level logic for microcontroller input capture. Use Value: ±7-V common-mode rejection maintains signal integrity despite ground loops and EMI from nearby VFDs and welders. |
Use Scenario: Interfacing motion controllers to servo amplifiers using differential encoder or command lines in closed-loop positioning systems. IC Role / Device Role / Timing Role: Quad-channel receiver capturing synchronized axis commands and status bits across long cable runs. Use Value: 35 ns max propagation delay ensures deterministic timing for real-time motion control loops operating at kHz update rates. |
| Smart Grid Meters | ATM & Cash Counting Systems |
|
Use Scenario: Isolating and conditioning RS-422 communication between utility metering ICs and concentrator gateways in outdoor substations. IC Role / Device Role / Timing Role: Robust physical layer receiver handling long-haul, multi-drop serial links in temperature-varying outdoor enclosures. Use Value: –40°C to +85°C rating and ±200-mV sensitivity ensure reliable start-up and operation across seasonal ambient extremes. |
Use Scenario: Reading banknote validation sensor data and secure module status over differential links inside high-reliability cash handling hardware. IC Role / Device Role / Timing Role: Fail-safe receiver ensuring defined logic states during sensor cable disconnection or jam events. Use Value: Open-input high-default behavior prevents false triggers or undefined state transitions during mechanical service interventions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential line receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LBC179DR | Lower common-mode range (±7 V same), but higher ESD rating (±15 kV HBM vs ±500 V), and integrated transient protection. | Better suited for unshielded field deployments where lightning-induced surges are likely; lacks fail-safe open-input behavior. | Select SN65LBC179DR when surge immunity outweighs need for automatic high-default on open wires. |
| DS3695MX | Same pinout and function, but rated only for 0°C to +70°C (commercial grade); no industrial temp qualification. | Limited to indoor, climate-controlled environments like office ATMs or lab test fixtures - not suitable for factory or outdoor use. | Choose DS3695MX only for cost-sensitive commercial designs where temperature range is guaranteed within 0–70°C. |
Compared with SN65LBC179DR and DS3695MX, AM26LS32AIDR uniquely combines industrial temperature operation, fail-safe open-input logic, and proven RS-422 compliance - making it the preferred choice for mission-critical industrial interfaces where reliability trumps marginal cost savings.
Availability
AM26LS32AIDR is available at Aetrix Electronics and suitable for factory automation, AC/servo motor drives, and smart grid metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AM26LS32AIDR 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 experience in industrial-grade interface solutions.
The AM26LS32AIDR belongs to TI's legacy RS-422/RS-485 receiver family, designed specifically for robust, noise-immune digital data transmission in electrically hostile environments such as manufacturing plants and energy infrastructure.
FAQ
What is the operating temperature range of the AM26LS32AIDR?
The AM26LS32AIDR is specified for operation from –40°C to +85°C, as confirmed by its "I" temperature grade designation and characterization data in Section 6.3 of the official datasheet. This industrial temperature range makes AM26LS32AIDR suitable for deployment in factory automation, motor drives, and outdoor smart grid equipment where ambient conditions exceed commercial-grade limits.
Does the AM26LS32AIDR support fail-safe operation with open inputs?
Yes, the AM26LS32AIDR implements fail-safe behavior: when differential inputs (e.g., 1A/1B) are left unconnected or floating, all four outputs (1Y–4Y) default to a logic-high state. This is explicitly documented in the device description and functional table (Table 8-1), preventing undefined logic states during cable faults or transmitter outages.
What are the enable input configurations supported by the AM26LS32AIDR?
The AM26LS32AIDR provides two complementary enable inputs - G (active-high) and G (active-low). Either input alone can enable all four receivers; the other must be held at its inactive logic level. This dual-enable architecture simplifies integration with both TTL and CMOS controllers, as detailed in Section 8.3 and the function table.
Can the AM26LS32AIDR be used with RS-485 transceivers?
Yes, the AM26LS32AIDR is compatible with RS-485 transceivers because it meets ANSI TIA/EIA-422-B and ITU V.10/V.11 standards - which define the electrical characteristics also adopted by RS-485 receivers. Its ±7-V common-mode range and ±200-mV sensitivity satisfy RS-485 receiver requirements for multi-drop half-duplex networks.
What package type and lead finish does the AM26LS32AIDR use?
The AM26LS32AIDR is packaged in a 16-pin SOIC (D) body with dimensions 9.9 mm × 6.0 mm. It features NiPdAu (nickel-palladium-gold) lead finish, RoHS-compliant, and carries MSL Level-1 rating - meaning unlimited floor life under standard storage conditions (≤30°C/60% RH), as verified in TI's Package Option Addendum.
AM26LS32AIDR 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:
- Receiver
- Protocol:
- RS422, RS423
- Number of Drivers/Receivers:
- 0/4
- Duplex:
- -
- Receiver Hysteresis:
- 50 mV
- Data Rate:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
AM26LS32AIDR FAQ
1.How can I place an order for AM26LS32AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for AM26LS32AIDR 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 AM26LS32AIDR reliable?
The price and inventory of AM26LS32AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM26LS32AIDR is usually 5 days.
3.What payment methods are accepted for AM26LS32AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM26LS32AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM26LS32AIDR?
AM26LS32AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM26LS32AIDR 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 AM26LS32AIDR?
For technical support, including AM26LS32AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM26LS32AIDR requirements.
6.How does Aetrix verify that AM26LS32AIDR is sourced from the original manufacturer or authorized distributors?
All AM26LS32AIDR 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 AM26LS32AIDR meets industry standards.
7.What is the process for return or replacement of AM26LS32AIDR?
All AM26LS32AIDR units undergo pre-shipment inspection (PSI). If there is an issue with AM26LS32AIDR, 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 AM26LS32AIDR part is unused and in its original packaging.
Return procedure for AM26LS32AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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