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Texas Instruments DS26LS32ACM
- Part No.:
- DS26LS32ACM
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS26LS32ACM.pdf
- Description:
- IC TRANSCEIVER 0/4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,587
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Product details
Overview
DS26LS32ACM from Texas Instruments is a quad differential line receiver IC designed for RS-422 and RS-423 balanced/unbalanced digital data transmission systems. 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, 6 kΩ minimum input impedance, and TRI-STATE outputs with complementary enables-enabling direct connection to shared data buses in industrial serial interfaces.
For engineers reviewing the DS26LS32ACM datasheet, DS26LS32ACM pinout, DS26LS32ACM application, or DS26LS32ACM equivalent, key selection criteria include RS-422/RS-423 compliance, commercial-temperature SOIC-16 packaging, differential input robustness to ±7 V common-mode voltage, TRI-STATE bus interface capability, and integrated input pull-up/pull-down resistors preventing oscillation on unused channels.
Technical Context
The DS26LS32ACM implements four independent high-impedance differential receivers with internal biasing resistors on each input pair-eliminating external termination requirements for floating inputs. Its logic-level enable/disable control (active-low ENABLE and active-high ENABLE) supports synchronous bus arbitration across all four channels.
It uses low-power Schottky bipolar technology to achieve propagation delays of 17–25 ns (tPLH/tPHL) and enable/disable times as low as 15 ns (tZL/tZH), while maintaining compatibility with legacy TTL/CMOS logic families via 0.8 V VIL and 2.0 V VIH thresholds.
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 without regulation overhead. |
| Differential Input Sensitivity | ±0.2 V: Guarantees reliable detection of small signal swings even under noisy industrial EMI conditions. |
| Common-Mode Input Range | ±7 V: Supports robust reception in electrically noisy environments with ground potential differences up to 14 V between transmitter and receiver. |
| Input Hysteresis | 100 mV: Prevents output chatter during slow-rising/falling or marginally valid differential inputs. |
| Output Sink Current | 8 mA: Sufficient drive strength to directly interface with standard TTL loads or parallel bus stubs. |
| TRI-STATE Enable Propagation | tZL/tZH = 15–22 ns: Enables fast, glitch-free bus release for time-critical multi-drop communication protocols. |
| Operating Temperature | 0°C to +70°C: Qualified for commercial-grade embedded systems including PLC I/O modules and instrumentation front-ends. |
Pinout & Package
DS26LS32ACM is housed in a 16-pin SOIC (D package), 7.5 mm wide body, 1.75 mm height, with 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; device orientation follows TI standard D-package top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 9 | Differential Input Pairs A–D (IN+ / IN−) | Eight terminals forming four matched differential input pairs; each pair includes internal pull-up/pull-down resistors to prevent floating-induced oscillation. |
| 8 | GND | Power return reference for all receivers and enable circuitry; requires low-impedance PCB connection to minimize noise coupling. |
| 10, 11, 12, 13 | Outputs Y1–Y4 | Active-high TTL-compatible outputs; driven only when ENABLE = low AND ENABLE = high; otherwise high-impedance. |
| 14 | ENABLE | Active-low global enable controlling all four receivers; tied low to activate outputs, high to force TRI-STATE. |
| 15 | ENABLE | Active-high global enable complement; must be high when ENABLE is low for normal operation; used for complementary bus control logic. |
| 16 | VCC | +5 V power supply input; bypass capacitor (0.1 µF ceramic) required adjacent to pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated input bias resistors | Eliminates need for external pull-up/down networks on unused channels-reducing BOM count and layout complexity in multi-receiver systems. |
| Complementary enable inputs | Supports direct interfacing with both active-low and active-high bus control signals without external inverters-simplifying FPGA/CPLD interface design. |
| TRI-STATE bus-compatible outputs | Enables direct connection to shared data buses (e.g., RS-422 backplanes) without external bus transceivers or isolation logic. |
| 100 mV input hysteresis | Improves noise immunity on marginal signal edges-critical for long cable runs or electrically harsh factory-floor environments. |
| 6 kΩ minimum input impedance | Reduces loading on upstream drivers-preserving signal integrity in daisy-chained or star-topology RS-422 networks. |
Applications
| Industrial PLC Serial Interface | Factory Automation Data Hub |
|---|---|
|
Use Scenario: Receiving differential commands from remote I/O modules over twisted-pair cabling in noisy plant-floor environments. IC Role / Device Role / Timing Role: Quad differential line receiver converting RS-422 signals into clean TTL-level logic for microcontroller UART input. Use Value: ±7 V common-mode tolerance rejects ground-loop noise; internal bias resistors prevent false triggering when modules are disconnected or powered down. |
Use Scenario: Aggregating sensor data streams from multiple RS-422 field devices onto a central CAN-to-RS-422 gateway controller. IC Role / Device Role / Timing Role: Bus-interface receiver enabling concurrent monitoring of four independent differential links without contention. Use Value: Complementary ENABLE/ENABLE pins allow synchronized channel activation/deactivation-ensuring deterministic timing during bus arbitration. |
| Medical Diagnostic Equipment Backplane | Test & Measurement Instrument Front-End |
|
Use Scenario: Isolating and conditioning RS-422 control signals between modular subsystems in MRI or ultrasound platforms. IC Role / Device Role / Timing Role: Signal integrity guard for safety-critical command paths-rejecting EMI from high-power RF sections. Use Value: 100 mV hysteresis suppresses metastability during transient coupling events; SOIC-16 package supports automated optical inspection and reflow compatibility. |
Use Scenario: Interfacing calibrated analog-to-digital subsystems with host PC via RS-422 link in benchtop multimeters or spectrum analyzers. IC Role / Device Role / Timing Role: High-fidelity differential receiver preserving signal edge integrity for precise timing recovery. Use Value: 17–25 ns propagation delay ensures sub-microsecond latency; 6 kΩ input impedance minimizes source loading on precision driver stages. |
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 ±15 V common-mode range; no internal input bias resistors; requires external termination. | Better suited for long-haul (>1 km), high-noise utility metering where ±15 V tolerance is mandatory. | Select SN65LBC174A only if system demands >±7 V common-mode immunity and external biasing is acceptable. |
| MAX3044 | Lower 3.3 V supply operation; 500 ns max propagation delay; no complementary enable inputs. | Targeted at low-power, battery-operated portable test gear-not compatible with 5 V bus architectures. | Choose MAX3044 only for new 3.3 V designs requiring ultra-low ICC (<1 mA); not drop-in for DS26LS32ACM. |
Compared with SN65LBC174A and MAX3044, the DS26LS32ACM uniquely balances commercial-temperature 5 V operation, built-in input biasing, and tight propagation timing-making it optimal for cost-sensitive, medium-distance industrial serial backplanes where layout simplicity and bus compatibility are prioritized.
Availability
DS26LS32ACM is available at Aetrix Electronics and suitable for industrial PLC serial interfaces, factory automation data hubs, medical diagnostic equipment backplanes, and test & measurement instrument front-ends requiring stable component supply across extended production cycles.
Supply support for DS26LS32ACM 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 U.S.-based semiconductor company specializing in analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The DS26LS32ACM belongs to TI's legacy RS-422/RS-423 interface product line, engineered specifically for robust, low-cost differential data reception in commercial-grade industrial control and instrumentation systems.
FAQ
What is the operating temperature range for the DS26LS32ACM?
The DS26LS32ACM is specified for commercial-grade operation from 0°C to +70°C. This range aligns with its DS26LS32AC designation and SOIC packaging, making it suitable for indoor industrial electronics, lab equipment, and non-military embedded systems where ambient thermal stress remains within these bounds. The DS26LS32ACM does not support extended or military temperature ranges.
Does the DS26LS32ACM require external pull-up or pull-down resistors on its inputs?
No, the DS26LS32ACM integrates internal pull-up and pull-down resistors on each differential input pair (pins 1–7, 9), eliminating the need for external biasing components. This feature prevents output oscillation on unused or unterminated channels-a key differentiator from the base DS26LS32C and critical for reliable operation in modular or hot-pluggable systems using the DS26LS32ACM.
What is the maximum common-mode voltage the DS26LS32ACM can tolerate?
The DS26LS32ACM supports a common-mode input voltage range of ±7 V, verified per RS-422 and RS-423 standards. This allows the device to reject ground potential differences up to 14 V between transmitter and receiver nodes-essential for noise resilience in factory-floor wiring or multi-chassis instrumentation setups using the DS26LS32ACM.
Can the DS26LS32ACM be used with a 3.3 V supply?
No, the DS26LS32ACM is rated exclusively for 4.75–5.25 V operation and is not guaranteed to function correctly below 4.75 V. Its internal Schottky logic thresholds, output drive strength, and enable voltage levels (VIL = 0.8 V, VIH = 2.0 V) are optimized for 5 V TTL compatibility. For 3.3 V systems, consider alternatives like the MAX3044-not the DS26LS32ACM.
How does the DS26LS32ACM differ from the DS26LS32C?
The DS26LS32ACM includes internal input pull-up/pull-down resistors absent in the DS26LS32C, preventing false triggering on floating inputs. Both share identical pinout, SOIC-16 packaging, ±7 V common-mode range, and 100 mV hysteresis-but only the DS26LS32ACM variant provides integrated biasing, making it the preferred choice for systems with variable channel utilization or unpopulated connectors.
DS26LS32ACM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
DS26LS32ACM FAQ
1.How can I place an order for DS26LS32ACM through Aetrix?
Please submit a Request for Quotation (RFQ) for DS26LS32ACM 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 DS26LS32ACM reliable?
The price and inventory of DS26LS32ACM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS26LS32ACM is usually 5 days.
3.What payment methods are accepted for DS26LS32ACM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS26LS32ACM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS26LS32ACM?
DS26LS32ACM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS26LS32ACM 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 DS26LS32ACM?
For technical support, including DS26LS32ACM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS26LS32ACM requirements.
6.How does Aetrix verify that DS26LS32ACM is sourced from the original manufacturer or authorized distributors?
All DS26LS32ACM 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 DS26LS32ACM meets industry standards.
7.What is the process for return or replacement of DS26LS32ACM?
All DS26LS32ACM units undergo pre-shipment inspection (PSI). If there is an issue with DS26LS32ACM, 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 DS26LS32ACM part is unused and in its original packaging.
Return procedure for DS26LS32ACM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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