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Texas Instruments AM26LS32ACNS
- Part No.:
- AM26LS32ACNS
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AM26LS32ACNS.pdf
- Description:
- IC TRANSCEIVER 0/4 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,589
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Product details
Overview
AM26LS32ACNS 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, delivers ±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 interfaces for factory automation and motor drive control systems.
For engineers reviewing the AM26LS32ACNS datasheet, AM26LS32ACNS pinout, AM26LS32ACNS application, or AM26LS32ACNS equivalent, this page provides verified electrical specifications, package mapping to SOP-16 (NS), functional pin roles, real-world use cases in balanced digital transmission, and validated alternative receivers for system-level design continuity.
Technical Context
The AM26LS32ACNS implements four independent RS-422-compliant differential receivers with complementary enable inputs (G and G̅) supporting both active-high and active-low configuration. Its internal low-power Schottky logic ensures TTL-compatible output levels while maintaining high noise immunity via 50 mV typical input hysteresis.
Each receiver channel accepts differential inputs across ±7 V common-mode range and produces logic-level outputs with 20 ns–40 ns disable/enable timing. The device uses fail-safe biasing to force high outputs when inputs are unconnected-critical for robust industrial communication links.
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 over long cables (up to 1000 m) in electrically noisy environments such as factory floors or motor drives. |
| Differential Sensitivity | ±200 mV - Guarantees valid logic decision even with attenuated or distorted differential signals on unterminated or mismatched lines. |
| Input Hysteresis | 50 mV typical - Suppresses chatter and false triggering caused by slow-rising or noisy differential inputs. |
| Output Drive | 8 mA sink / –440 µA source - Sufficient to directly drive multiple TTL loads or interface with microcontroller GPIOs without external buffering. |
| Propagation Delay | 20 ns to 35 ns - Supports data rates up to ~20 Mbps in point-to-point configurations with tight timing budgets. |
| Operating Temperature | 0°C to 70°C - Qualified for commercial and industrial ambient conditions where extended thermal cycling is not required. |
Pinout & Package
SOP-16 (NS) package: 10.2 mm × 7.8 mm body, surface-mount, gull-wing leads, RoHS-compliant NIPDAU finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 1B | Differential input pair (Ch1) | Noninverting (1A) and inverting (1B) inputs for first RS-422 receiver channel; accept balanced signals per EIA-422. |
| 1Y | Logic output (Ch1) | TTL-compatible output for Ch1; high-impedance when disabled via G/G̅ controls. |
| 2A, 2B | Differential input pair (Ch2) | Noninverting (2A) and inverting (2B) inputs for second receiver channel. |
| 2Y | Logic output (Ch2) | Active-low enabled output; shares common enable logic with all four channels. |
| 3A, 3B | Differential input pair (Ch3) | Third differential input pair; identical electrical behavior to Ch1/Ch2. |
| 3Y | Logic output (Ch3) | 3-state output synchronized to global enable function. |
| 4A, 4B | Differential input pair (Ch4) | Fourth differential input pair; supports full quad-receiver operation. |
| 4Y | Logic output (Ch4) | Final TTL-level output; enables bus-organized multi-drop topologies. |
| G, G̅ | Complementary enable inputs | Simultaneously enable/disable all four outputs; G = active-high, G̅ = active-low - allows flexible MCU interface logic matching. |
| VCC, GND | Power supply terminals | Single 5-V supply with dedicated ground; requires local 0.1-µF ceramic bypass capacitor per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| EIA-422-B / EIA-423-B compliance | Fully meets ANSI TIA/EIA-422-B and TIA/EIA-423-B physical layer requirements - ensures interoperability with certified transceivers and cabling infrastructure. |
| Fail-safe open-input operation | Outputs default to logic high when inputs float - prevents undefined states in disconnected or unterminated bus segments. |
| ±7-V common-mode range | Rejects ground potential differences up to ±7 V between transmitter and receiver - essential for distributed industrial systems with separate grounding domains. |
| 3-state outputs with dual-enable logic | Enables direct connection to shared data buses; complementary G/G̅ pins simplify interface with either active-high or active-low control signals. |
| 50 mV input hysteresis | Reduces susceptibility to noise-induced transitions on slow or degraded differential waveforms - improves reliability in EMI-heavy environments. |
Applications
| Factory Automation | AC Motor Drives |
|---|---|
|
Use Scenario: Interfacing PLC I/O modules with remote sensor nodes over 300-m twisted-pair cable in a metal-rich production cell. IC Role / Device Role / Timing Role: Differential line receiver converting RS-422 bus signals into clean TTL logic for microcontroller input capture. Use Value: ±7-V common-mode rejection suppresses ground-loop noise from welding equipment and variable-frequency drives, ensuring error-free command decoding. |
Use Scenario: Receiving position feedback and control commands from servo amplifiers in closed-loop motion control cabinets. IC Role / Device Role / Timing Role: Quad-channel receiver isolating four independent RS-422 links for encoder, torque, speed, and fault status signals. Use Value: 3-state outputs allow dynamic bus sharing among multiple drive units; fail-safe behavior prevents spurious motion commands during cable disconnect events. |
| Smart Grid Meters | ATM Cash Handling Systems |
|
Use Scenario: Communicating with remote terminal units (RTUs) in outdoor substations using shielded RS-422 links exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Robust differential receiver front-end protecting downstream metering SoC from induced common-mode transients. Use Value: ±25-V absolute maximum differential input rating (per datasheet Section 6.1) provides margin against surge coupling, while ±7-V operating range ensures signal integrity post-clamping. |
Use Scenario: Reading bill validation and stacker status signals from cash transport mechanisms inside ATM chassis with high EMI from motors and solenoids. IC Role / Device Role / Timing Role: Isolating noisy mechanical subsystems from main controller via differential signaling to eliminate false bill-jam detection. Use Value: 50 mV hysteresis eliminates chatter on slow-moving sensor edges; 20 ns–40 ns enable/disable timing supports rapid state polling of multiple actuators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential line receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LBC179D | Wider ±12-V common-mode range; higher 12 mA output drive; operates down to –40°C. | Better suited for extended temperature or higher-noise environments (e.g., outdoor smart grid nodes). | Select SN65LBC179D when >±7-V common-mode margin or industrial temp range is required; not pin-compatible with AM26LS32ACNS. |
| DS3695MX | Higher ±15-V common-mode range (like AM26LS33A); no input hysteresis; different enable architecture (single active-low EN). | Used in legacy RS-423 systems requiring greater voltage tolerance but less noise immunity. | Choose DS3695MX only if legacy board reuse demands identical footprint and pin count; verify hysteresis absence does not impact signal integrity. |
Compared with SN65LBC179D and DS3695MX, the AM26LS32ACNS offers optimized balance of noise immunity (50 mV hysteresis), fail-safe behavior, and TTL-level compatibility at commercial temperature range - making it ideal for cost-sensitive, space-constrained industrial controllers where ±7-V common-mode suffices.
Availability
AM26LS32ACNS is available at Aetrix Electronics and suitable for factory automation, AC motor drives, and smart grid metering applications requiring stable component supply and long-term industrial availability.
Supply support for AM26LS32ACNS 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, embedded processing, and connectivity technologies, with decades of leadership in industrial interface ICs.
The AM26LS32A family was designed specifically for robust RS-422/RS-423 differential data reception in electrically harsh industrial environments - emphasizing noise immunity, fail-safe operation, and TTL compatibility.
FAQ
What is the operating temperature range for AM26LS32ACNS?
The AM26LS32ACNS is characterized for operation from 0°C to 70°C. This commercial-grade temperature rating aligns with its SOP-16 (NS) packaging and targets applications in controlled indoor industrial settings such as programmable logic controller (PLC) backplanes and automated test equipment. It is not rated for extended industrial (–40°C to 85°C) or military ranges.
Does AM26LS32ACNS support fail-safe operation?
Yes, AM26LS32ACNS includes built-in fail-safe circuitry. When differential inputs are left unconnected or floating, internal biasing forces all four outputs (1Y–4Y) to logic high. This behavior prevents undefined states in unterminated or disconnected RS-422 bus segments - a critical reliability feature in factory automation and motor control systems.
What are the key differences between AM26LS32ACNS and AM26LS33ACNS?
The AM26LS32ACNS offers ±7-V common-mode input range and ±200-mV differential sensitivity, while the AM26LS33ACNS provides ±15-V common-mode range and ±500-mV sensitivity. Both share identical pinout, 3-state outputs, and enable architecture, but AM26LS33ACNS is better suited for higher-voltage noise environments - neither is a drop-in replacement without verifying system-level common-mode margins.
Can AM26LS32ACNS be used with RS-485 transceivers?
Yes, AM26LS32ACNS is compatible with RS-485 transmitters when used in receive-only mode. Its differential input structure, ±7-V common-mode range, and EIA-422-B compliance meet RS-485 receiver electrical requirements. However, it lacks driver functionality and must be paired with a separate RS-485 transceiver (e.g., SN65HVD72) for full-duplex communication.
What is the purpose of the complementary G and G̅ pins on AM26LS32ACNS?
The G (active-high) and G̅ (active-low) pins provide dual-enable logic for all four receiver outputs. Either pin can independently enable the device - allowing seamless integration with microcontrollers that output active-high or active-low control signals. When both are asserted oppositely, outputs remain enabled; tying one inactive ensures deterministic behavior per TI's recommended practice.
AM26LS32ACNS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Receiver
- Protocol:
- RS422, RS485
- Number of Drivers/Receivers:
- 0/4
- Duplex:
- -
- Receiver Hysteresis:
- 50 mV
- Data Rate:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
AM26LS32ACNS FAQ
1.How can I place an order for AM26LS32ACNS through Aetrix?
Please submit a Request for Quotation (RFQ) for AM26LS32ACNS 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 AM26LS32ACNS reliable?
The price and inventory of AM26LS32ACNS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM26LS32ACNS is usually 5 days.
3.What payment methods are accepted for AM26LS32ACNS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM26LS32ACNS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM26LS32ACNS?
AM26LS32ACNS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM26LS32ACNS 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 AM26LS32ACNS?
For technical support, including AM26LS32ACNS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM26LS32ACNS requirements.
6.How does Aetrix verify that AM26LS32ACNS is sourced from the original manufacturer or authorized distributors?
All AM26LS32ACNS 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 AM26LS32ACNS meets industry standards.
7.What is the process for return or replacement of AM26LS32ACNS?
All AM26LS32ACNS units undergo pre-shipment inspection (PSI). If there is an issue with AM26LS32ACNS, 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 AM26LS32ACNS part is unused and in its original packaging.
Return procedure for AM26LS32ACNS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AM26LS32ACNS Tags
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ATA6561-GAQW-N
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