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Texas Instruments DS26LS32ACMX
- Part No.:
- DS26LS32ACMX
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS26LS32ACMX.pdf
- Description:
- IC TRANSCEIVER 0/4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,967
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Product details
Overview
DS26LS32ACMX from Texas Instruments is a quad differential line receiver IC designed for RS-422 and RS-423 balanced/unbalanced digital data transmission. It operates from a single 5V supply (4.75–5.25 V), delivers ±0.2 V input sensitivity over ±7 V common-mode range, features 100 mV input hysteresis, and provides TRI-STATE outputs with complementary enable logic-used in industrial serial communication interfaces.
For engineers reviewing the DS26LS32ACMX datasheet, DS26LS32ACMX pinout, DS26LS32ACMX application, or DS26LS32ACMX equivalent, this device is selected for robust noise immunity in long-line RS-422 receivers, bus-tied multi-drop systems, and legacy industrial control backplanes requiring guaranteed 200 mV differential threshold and integrated input pull-up/pull-down to prevent floating-channel oscillation.
Technical Context
The DS26LS32ACMX implements four independent high-impedance (6 kΩ min) differential receivers with internal input biasing-eliminating external termination resistors on unused channels. Its enable/disable control uses complementary active-low and active-high inputs to assert TRI-STATE output simultaneously across all four channels.
It meets full RS-422/RS-423 electrical compliance including ±7 V common-mode tolerance, ±25 V absolute maximum differential input voltage, and 17–25 ns propagation delay (tPLH/tPHL) at 5 V/25°C with 15 pF load-optimized for deterministic timing in synchronous serial links.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75–5.25 V - ensures stable operation within commercial-grade 5 V rail tolerances |
| Differential Input Sensitivity | ±0.2 V - guarantees reliable detection of small valid signals under noisy conditions |
| Common-Mode Input Range | ±7 V - supports long-cable runs with ground potential differences up to 14 V |
| Input Hysteresis | 100 mV - prevents chatter during slow-rising/falling edge transitions |
| Output Sink Current | 8 mA - drives standard TTL loads directly without external buffers |
| Propagation Delay | 17–25 ns - enables >20 Mbps data rates in point-to-point RS-422 links |
| Input Resistance | 6.0–8.5 kΩ - minimizes loading on upstream drivers while maintaining signal integrity |
Pinout & Package
DS26LS32ACMX is housed in a 16-pin SOIC (D package), 7.5 mm × 10.3 mm body, 1.27 mm pitch, RoHS-compliant with CU SN finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 7, 10 | Differential Input A (non-inverting) | Accepts positive leg of RS-422 pair; referenced to corresponding B pin |
| 2, 5, 8, 11 | Differential Input B (inverting) | Accepts negative leg of RS-422 pair; defines differential voltage polarity |
| 3, 6, 9, 12 | Output Y | TRI-STATE CMOS/TTL-compatible output; high-impedance when disabled |
| 13 | ENABLE (active low) | Global disable: pulls all outputs to Hi-Z when logic low |
| 14 | ENABLE (active high) | Global enable: asserts all outputs when logic high; complements Pin 13 |
| 16 | VCC | Positive supply terminal for all four receivers and output drivers |
| 8 | GND | Signal and power reference ground; shared across all channels |
Key Features
| Feature | Design Value |
|---|---|
| Integrated input pull-up/pull-down | Prevents undefined output states on unterminated or unused receiver channels |
| Complementary enable inputs | Supports both active-high and active-low system-level control without external logic inversion |
| 6 kΩ minimum input impedance | Reduces loading on differential drivers and maintains signal amplitude over long traces |
| TRI-STATE outputs with 8 mA sink | Enables direct connection to shared data buses without contention or level-shifting circuitry |
| 100 mV input hysteresis | Suppresses false triggering from EMI-induced noise near switching thresholds |
Applications
| Industrial PLC Backplane | Point-to-Point RS-422 Link |
|---|---|
Use Scenario: Receiving command/status data between CPU and I/O modules across a 1-meter PCB backplane with ground offsets up to ±3 V. IC Role / Device Role / Timing Role: Quad differential receiver converting twisted-pair RS-422 signals into clean TTL-level logic for microcontroller input capture. Use Value: ±7 V common-mode range absorbs ground differential; 100 mV hysteresis rejects board-level switching noise. | Use Scenario: Bidirectional serial link between two programmable logic controllers over 30 m of shielded twisted pair cable. IC Role / Device Role / Timing Role: RS-422 line receiver terminating one end of a point-to-point differential channel with precise 200 mV threshold detection. Use Value: Guaranteed ±0.2 V sensitivity ensures reliable decoding at 10 Mbps even with 1.5 Vpp differential swing degradation. |
| Multi-Drop Serial Bus | Legacy CNC Machine Interface |
Use Scenario: Interfacing eight remote sensors to a central controller using daisy-chained RS-422 receivers with bus-tied outputs. IC Role / Device Role / Timing Role: Quad receiver enabling four parallel sensor channels per IC; TRI-STATE outputs allow dynamic bus arbitration. Use Value: Complementary ENABLE pins simplify microcontroller GPIO usage; 8 mA sink drives bus capacitance without repeaters. | Use Scenario: Retrofitting modern motion controllers into older CNC equipment using existing RS-423 single-ended wiring. IC Role / Device Role / Timing Role: RS-423-compatible receiver interpreting unbalanced signals as pseudo-differential via internal biasing. Use Value: Internal pull-up/pull-down eliminates need for external bias resistors on legacy wiring harnesses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad differential receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65LBC174A | Higher 30 kΩ input impedance; 3.3 V/5 V dual-supply capable; no internal bias resistors | Requires external termination on unused channels; suited for mixed-voltage systems | Select when interfacing with 3.3 V logic or needing higher noise margin via elevated ZIN |
| DS34LS86 | Same pinout; lower 50 mV hysteresis; no complementary enable; 4.5–5.5 V supply range | Lacks floating-input protection; requires external enable logic for bus sharing | Select only if board layout rework is acceptable and input biasing is handled externally |
Compared with DS26LS32ACMX, SN65LBC174A offers wider supply flexibility and higher input impedance but lacks built-in biasing-increasing BOM count. DS34LS86 matches footprint but removes critical noise immunity features and complicates enable control, reducing design robustness in uncontrolled EMI environments.
Availability
DS26LS32ACMX is available at Aetrix Electronics and suitable for industrial automation, factory floor serial networks, and legacy equipment retrofits requiring stable component supply and long-term obsolescence management.
Supply support for DS26LS32ACMX 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The DS26LS32ACMX belongs to TI's legacy interface line of RS-422/RS-423 receivers, engineered for reliability in harsh industrial environments with guaranteed parametric performance across temperature and voltage extremes.
FAQ
What is the operating temperature range for DS26LS32ACMX?
The DS26LS32ACMX is rated for commercial operation from 0°C to +70°C. This range is defined in the datasheet's Operating Conditions table and applies specifically to the DS26LS32ACMX variant with SOIC packaging and NOPB suffix. The device does not support extended or military temperature grades-those are assigned to DS26LS32M and DS26LS33M variants.
Does DS26LS32ACMX require external pull-up or pull-down resistors on its inputs?
No, DS26LS32ACMX includes internal input pull-up and pull-down resistors on each differential pair, eliminating the need for external biasing components. This feature prevents output oscillation on unused channels and simplifies PCB layout-confirmed in the "FEATURES" section of the SNLS352C datasheet, which explicitly differentiates DS26LS32ACMX from DS26LS32 and DS26LS33.
Can DS26LS32ACMX be used in RS-423 applications?
Yes, DS26LS32ACMX meets all requirements of RS-423 for unbalanced digital data transmission. Its ±7 V common-mode input range and ±0.2 V differential sensitivity accommodate RS-423's single-ended driver topology when referenced to ground, as validated in the "TYPICAL APPLICATIONS" section showing Figure 7 (Single Wire with Driver Ground Reference).
What is the maximum data rate supported by DS26LS32ACMX?
DS26LS32ACMX supports data rates exceeding 20 Mbps in typical configurations. This is derived from its 17–25 ns propagation delay (tPLH/tPHL) at 5 V/25°C with 15 pF load, per the Switching Characteristics table in SNLS352C. Real-world throughput depends on cable length, termination, and noise-but the device's timing parameters are specified to enable reliable operation at ≥20 Mbps in point-to-point RS-422 links.
Is DS26LS32ACMX pin-compatible with DS26LS32CMX?
Yes, DS26LS32ACMX and DS26LS32CMX share identical SOIC-16 (D package) pinouts, pin functions, and mechanical dimensions. Both use the same D package drawing, 16-pin configuration, and complementary ENABLE architecture. However, DS26LS32CMX lacks internal input biasing and has different input sensitivity (±0.5 V), so functional substitution requires validation of signal integrity and noise immunity in the target application.
DS26LS32ACMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Receiver
- Protocol:
- RS422, RS423
- Number of Drivers/Receivers:
- 0/4
- Duplex:
- -
- Receiver Hysteresis:
- 100 mV
- Data Rate:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DS26LS32ACMX FAQ
1.How can I place an order for DS26LS32ACMX through Aetrix?
Please submit a Request for Quotation (RFQ) for DS26LS32ACMX 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 DS26LS32ACMX reliable?
The price and inventory of DS26LS32ACMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS26LS32ACMX is usually 5 days.
3.What payment methods are accepted for DS26LS32ACMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS26LS32ACMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS26LS32ACMX?
DS26LS32ACMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS26LS32ACMX 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 DS26LS32ACMX?
For technical support, including DS26LS32ACMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS26LS32ACMX requirements.
6.How does Aetrix verify that DS26LS32ACMX is sourced from the original manufacturer or authorized distributors?
All DS26LS32ACMX 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 DS26LS32ACMX meets industry standards.
7.What is the process for return or replacement of DS26LS32ACMX?
All DS26LS32ACMX units undergo pre-shipment inspection (PSI). If there is an issue with DS26LS32ACMX, 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 DS26LS32ACMX part is unused and in its original packaging.
Return procedure for DS26LS32ACMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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