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Texas Instruments DS26C32ATMX/NOPB
- Part No.:
- DS26C32ATMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS26C32ATMX/NOPB.pdf
- Description:
- IC TRANSCEIVER 0/4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,834
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Product details
Overview
DS26C32ATMX/NOPB from Texas Instruments is a quad differential line receiver IC designed for RS-422 and RS-423 balanced digital data transmission systems. It delivers ±0.2 V input sensitivity over ±7 V common-mode range, 19 ns typical propagation delay, 60 mV input hysteresis, and TRI-STATE outputs with 6 mA drive capability-enabling robust noise-immune signal recovery in industrial serial communication links.
For engineers reviewing the DS26C32ATMX/NOPB datasheet, DS26C32ATMX/NOPB pinout, DS26C32ATMX/NOPB application, or DS26C32ATMX/NOPB equivalent, key selection criteria include its CMOS-based low-power operation (23 mA max ICC), −40°C to +85°C industrial temperature rating, SOIC-16 package compatibility, and direct functional alignment with legacy LS-type receivers in multi-drop bus architectures.
Technical Context
The DS26C32ATMX/NOPB implements four independent high-speed differential receivers with internal pull-up/pull-down resistors on unused channels to prevent floating output oscillation. Its enable/disable control is shared across all four channels, supporting synchronized bus isolation in multi-receiver configurations.
It meets EIA RS-422 electrical requirements-including ±14 V absolute maximum differential input voltage and ±14 V common-mode range-while maintaining CMOS power efficiency. Input hysteresis (60 mV) ensures stable switching in noisy environments, and outputs remain high-impedance when VCC = 0 V, enabling hot-swap compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - operates reliably across standard 5 V rail tolerances without regulation overhead |
| Input Sensitivity | ±200 mV differential - detects valid logic transitions even under severe line attenuation or coupling loss |
| Propagation Delay | 19 ns typical - supports >25 Mbps data rates in point-to-point RS-422 links |
| Output Drive | ±6 mA - drives standard 50 Ω terminated lines or multiple LS/TTL inputs without external buffers |
| Operating Temp | −40°C to +85°C - qualified for industrial automation, motor control, and factory-floor communication systems |
| Input Hysteresis | 60 mV - suppresses chatter on slow-rising or noisy differential signals, improving noise margin by >3× vs non-hysteretic receivers |
| TRI-STATE Leakage | ±5 μA max - minimizes bus contention current during disable, critical for shared-bus arbitration integrity |
Pinout & Package
DS26C32ATMX/NOPB is housed in a 16-pin SOIC (Package Drawing D) surface-mount package with 1.27 mm pitch, 10.3 mm body width, and RoHS-compliant matte tin (SN) lead finish. Moisture sensitivity level is MSL-1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Differential Input A−, B−, C−, D− | Inverting inputs for each of four receiver channels; accept balanced RS-422 signals |
| 2, 5, 11, 14 | Differential Input A+, B+, C+, D+ | Non-inverting inputs for each channel; referenced to corresponding A−–D− pairs |
| 3, 6, 12, 15 | Output Y A, Y B, Y C, Y D | TRI-STATE CMOS outputs; active-high logic with 6 mA sink/source capability |
| 7 | GND | Power ground reference for all receiver circuitry and output drivers |
| 8 | VCC | +5 V supply input; powers internal bias networks and output stages |
| 9 | ENABLE | Active-high enable control; disables all four outputs simultaneously into high-impedance state |
| 16 | NC | No-connect pin; internally unconnected and must remain unconnected on PCB |
Key Features
| Feature | Design Value |
|---|---|
| CMOS Low-Power Design | 23 mA max quiescent supply current at 5 V - reduces thermal load and enables dense board layouts in space-constrained enclosures |
| ±0.2 V Input Sensitivity | Valid detection down to 200 mV differential swing - maintains reliable operation with long cables, impedance mismatches, or aging transceivers |
| Internal Pull-Up/Pull-Down Resistors | Prevents undefined output states on unused channels - eliminates need for external biasing components and simplifies PCB design |
| TRI-STATE Output Control | Single ENABLE pin disables all four outputs - enables clean bus sharing in multi-drop RS-422 networks without signal contention |
| Hot-Swap Safe Inputs | Inputs remain high-impedance and non-loading when VCC = 0 V - allows safe insertion/removal in live backplane or modular systems |
Applications
| Industrial PLC Backplane Communication | Factory Automation Serial Bus |
|---|---|
Use Scenario: Bidirectional data exchange between CPU and I/O modules across a 1-meter backplane trace with 30 pF/m capacitance and 2 kΩ termination. IC Role / Device Role / Timing Role: Differential receiver converting RS-422 bus signals into clean CMOS logic levels for FPGA or microcontroller input sampling. Use Value: 60 mV hysteresis prevents metastability during voltage rail transients; 19 ns propagation delay ensures timing closure at 20 Mbps baud rate. |
Use Scenario: Central controller reading status from 8 remote sensor nodes via daisy-chained RS-422 links operating in electrically noisy motor-drive zones. IC Role / Device Role / Timing Role: Channelized receiver isolating individual node responses on shared differential pair, with ENABLE used for sequential polling. Use Value: ±7 V common-mode range rejects 120 Hz ground-loop noise; TRI-STATE outputs prevent bus contention during idle polling intervals. |
| Medical Imaging Data Acquisition | Avionics Data Concentrator Interface |
Use Scenario: Receiving real-time pixel stream from X-ray detector head over 3-meter shielded twisted-pair cable inside MRI-shielded enclosure. IC Role / Device Role / Timing Role: High-fidelity differential receiver recovering low-jitter clock/data embedded in RS-422 format for ADC synchronization. Use Value: 19 ns propagation delay matches transmitter skew; ±14 V absolute input rating withstands ESD events up to 2 kV HBM. |
Use Scenario: Interfacing ARINC 429-compatible avionics subsystems to a central data concentrator using RS-422 physical layer adaptation. IC Role / Device Role / Timing Role: Signal-level translator converting differential bus voltages to logic-compatible levels for FPGA-based protocol parsing. Use Value: −40°C to +85°C rating supports operation in unheated cargo bays; SOIC-16 package meets DO-254 layout density requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad differential receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS26LS32ACN/NOPB | Bipolar (not CMOS); higher ICC (35 mA typ), slower propagation (23 ns typ), no VCC = 0 V input isolation | Limited suitability for low-power or hot-swap systems; requires tighter thermal management | Select when legacy LS compatibility is mandatory and power budget exceeds 30 mA per receiver |
| SN65LBC179DR | Single-channel RS-422 receiver; 12 ns propagation, ±12 V common-mode, but no integrated ENABLE or TRI-STATE | Requires four discrete devices and external logic for channel enable control; increases BOM count and layout area | Select when ultra-low propagation delay (<15 ns) is prioritized over integration and bus-sharing simplicity |
Compared with DS26C32ATMX/NOPB, DS26LS32ACN/NOPB trades CMOS efficiency for proven bipolar robustness in legacy designs, while SN65LBC179DR offers speed at the cost of integration-making DS26C32ATMX/NOPB optimal for new industrial bus nodes requiring low power, single-package quad receive capability, and synchronized bus control.
Availability
DS26C32ATMX/NOPB is available at Aetrix Electronics and suitable for industrial automation, factory-floor serial communication, and medical imaging equipment requiring stable component supply and long-term manufacturability.
Supply support for DS26C32ATMX/NOPB 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 interface ICs and industrial-grade signal conditioning.
The DS26C32ATMX/NOPB belongs to TI's legacy RS-422/RS-423 interface product line, engineered specifically for noise-immune, long-distance digital data transmission in harsh electromagnetic environments.
FAQ
What is the operating temperature range for DS26C32ATMX/NOPB?
The DS26C32ATMX/NOPB is rated for operation from −40°C to +85°C, making it suitable for industrial environments including factory automation, motor control cabinets, and outdoor instrumentation enclosures where ambient temperatures fluctuate widely. This range is confirmed in the "Operating Conditions" table of the official SNLS382C datasheet and applies specifically to the DS26C32AT variant marked on the DS26C32ATMX/NOPB device.
Does DS26C32ATMX/NOPB support hot-swap operation when VCC is unpowered?
Yes, DS26C32ATMX/NOPB inputs remain high-impedance and do not load the line when VCC = 0 V, as explicitly stated in the "Features" section of the datasheet. This behavior allows safe insertion or removal of the DS26C32ATMX/NOPB into live RS-422 buses without disrupting communication on other nodes-a critical capability for modular PLC backplanes and field-replaceable I/O cards.
Is DS26C32ATMX/NOPB pin-compatible with DS26LS32A?
Yes, DS26C32ATMX/NOPB is pin-compatible with DS26LS32A and AM26LS32, as confirmed in the "Features" section of the SNLS382C datasheet. Both share identical SOIC-16 pinouts, terminal functions, and mechanical footprint-enabling drop-in replacement in existing LS-based designs without PCB modification, provided system-level timing and power constraints accommodate the DS26C32ATMX/NOPB's lower ICC and faster propagation.
What is the minimum differential input voltage required for DS26C32ATMX/NOPB to switch reliably?
The DS26C32ATMX/NOPB guarantees switching for differential input voltages ≥±200 mV across its full common-mode range (−7 V to +7 V), with 60 mV of built-in hysteresis to prevent chatter. This specification is verified in the "DC Electrical Characteristics" table under parameter VTH (Minimum Differential Input Voltage) and ensures robust operation even with degraded signal integrity due to cable loss or connector wear.
Can DS26C32ATMX/NOPB be used in RS-485 systems?
DS26C32ATMX/NOPB is not an RS-485 transceiver and lacks driver functionality or fail-safe biasing-its sole function is differential reception compliant with RS-422/RS-423. While it can decode RS-485 bus signals when paired with a separate RS-485 driver (e.g., DS26C31), it does not meet RS-485 receiver standards such as unit load or open-circuit fail-safe behavior. Use only in RS-422 contexts unless externally augmented.
DS26C32ATMX/NOPB 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:
- 60 mV
- Data Rate:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DS26C32ATMX/NOPB FAQ
1.How can I place an order for DS26C32ATMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for DS26C32ATMX/NOPB 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 DS26C32ATMX/NOPB reliable?
The price and inventory of DS26C32ATMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS26C32ATMX/NOPB is usually 5 days.
3.What payment methods are accepted for DS26C32ATMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS26C32ATMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS26C32ATMX/NOPB?
DS26C32ATMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS26C32ATMX/NOPB 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 DS26C32ATMX/NOPB?
For technical support, including DS26C32ATMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS26C32ATMX/NOPB requirements.
6.How does Aetrix verify that DS26C32ATMX/NOPB is sourced from the original manufacturer or authorized distributors?
All DS26C32ATMX/NOPB 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 DS26C32ATMX/NOPB meets industry standards.
7.What is the process for return or replacement of DS26C32ATMX/NOPB?
All DS26C32ATMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with DS26C32ATMX/NOPB, 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 DS26C32ATMX/NOPB part is unused and in its original packaging.
Return procedure for DS26C32ATMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS26C32ATMX/NOPB Tags
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