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STMicroelectronics ST26C32ABDR
- Part No.:
- ST26C32ABDR
- Manufacturer:
- STMicroelectronics
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST26C32ABDR.pdf
- Description:
- IC TRANSCEIVER 0/4 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,745
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Product details
Overview
ST26C32ABDR from STMicroelectronics is a CMOS quad 3-state differential line receiver compliant with RS-422 and RS-423 standards, designed for balanced/unbalanced digital data transmission. It delivers ±200 mV input sensitivity over ±7 V common-mode range, 19 ns typical propagation delay, 60 mV input hysteresis, and 6 mA output drive capability. Used in industrial serial communication interfaces where noise immunity and bus-sharing are critical.
For engineers reviewing the ST26C32ABDR datasheet, ST26C32ABDR pinout, ST26C32ABDR application, or ST26C32ABDR equivalent, key selection factors include differential input threshold stability across temperature, 3-state enable timing (tPZH/tPLZ = 13–23 ns), RS-422/RS-423 compliance verification, and SO-16 package thermal performance in high-density PCB layouts.
Technical Context
The ST26C32ABDR implements four independent differential receivers with shared dual-enable control (pins 4 and 12), each featuring internal pull-up/pull-down resistors to suppress floating-channel oscillation. Its CMOS architecture ensures low quiescent current (16–23 mA at VCC = 5 V) while maintaining robust ±14 V absolute maximum input common-mode and differential voltage ratings.
Input hysteresis (60 mV typ.) enhances noise rejection in electrically noisy environments, and 3-state outputs support multi-drop bus architectures with 6 mA sink/source capability. Propagation delay (19–30 ns) and enable/disable timing (13–23 ns) are characterized under CL = 50 pF, supporting up to 20 Mbits/s data rates with all outputs switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - Ensures compatibility with standard 5 V logic systems and tolerance to rail droop. |
| Input Sensitivity | ±200 mV - Guarantees reliable detection of small differential signals across full ±7 V common-mode range. |
| Propagation Delay | 19–30 ns - Enables high-speed serial links up to 20 Mbits/s with deterministic timing margins. |
| Output Drive | ±6 mA - Sufficient to drive standard 100 Ω termination loads without external buffers. |
| Input Hysteresis | 60 mV typ. - Reduces susceptibility to noise-induced false triggering on slow or noisy inputs. |
| Enable Timing | tPZH/tPLZ = 13–23 ns - Supports fast bus arbitration and dynamic channel activation in multiplexed systems. |
| Quiescent Current | 16–23 mA - Low power consumption relative to bipolar RS-422 receivers, easing thermal design. |
Pinout & Package
ST26C32ABDR is housed in a 16-pin SOIC (SO-16) surface-mount package with 1.27 mm pitch, RoHS-compliant and ECOPACK® certified. Dimensions: 9.8–10.0 mm × 5.8–6.2 mm × 1.75 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 6, 7, 9, 10, 14, 15 | Differential Input Pair (A1/A2, B1/B2, C1/C2, D1/D2) | Accepts balanced RS-422 or unbalanced RS-423 signals; internal biasing prevents floating states. |
| 3, 5, 11, 13 | 3-State Output (AOUT, BOUT, COUT, DOUT) | Active-high outputs with high-impedance disable; supports wired-OR and shared-bus topologies. |
| 4, 12 | Enable Input (EN) | Active-high control for all four receivers; dual pins simplify PCB routing and reduce trace inductance. |
| 8 | GND | Signal reference plane for all inputs/outputs; requires low-impedance connection to minimize ground bounce. |
| 16 | VCC | 5 V supply input; decoupling capacitor (0.1 µF) required within 5 mm for stable switching operation. |
Key Features
| Feature | Design Value |
|---|---|
| RS-422/RS-423 Compliance | Fully meets EIA-422B and EIA-423B electrical requirements for interoperability with legacy and modern transceivers. |
| Zero-Load Input at VCC = 0 V | Inputs present no load to transmission lines during power-down, preventing signal corruption in hot-swap or partial-power systems. |
| Internal Bias Resistors | Eliminates need for external pull-ups/pull-downs on unused channels, reducing BOM count and board area. |
| High Common-Mode Range | ±7 V operating range accommodates ground potential differences between nodes in distributed industrial networks. |
| Fast Enable/Disable | Sub-25 ns transition to/from high-Z state enables precise bus contention control in real-time protocols. |
Applications
| Industrial PLC Backplane | Factory Automation Serial Bus |
|---|---|
Use Scenario: Interconnecting I/O modules across a DIN-rail mounted PLC chassis using twisted-pair cabling. IC Role / Device Role / Timing Role: Receives differential command/status data from remote terminal units (RTUs) via RS-422 links. Use Value: ±200 mV sensitivity and ±7 V common-mode range tolerate ground offsets between modules; 3-state outputs allow dynamic bus sharing among multiple controllers. | Use Scenario: Linking servo drives, HMIs, and motion controllers in a synchronized production line network. IC Role / Device Role / Timing Role: Terminates RS-422 point-to-point or multidrop links carrying position feedback and setpoint commands. Use Value: 19 ns propagation delay ensures sub-microsecond timing alignment; internal hysteresis rejects EMI from nearby motor drives. |
| Point-of-Sale Terminal Interface | Medical Diagnostic Equipment Data Link |
Use Scenario: Connecting barcode scanners, receipt printers, and cash drawers to a central POS controller over extended cables. IC Role / Device Role / Timing Role: Receives asynchronous serial data (e.g., RS-232 converted to RS-422) in electrically noisy retail environments. Use Value: 60 mV input hysteresis suppresses noise from fluorescent lighting and switching power supplies; SO-16 package supports compact, cost-effective assembly. | Use Scenario: Transmitting sensor readings and control signals between imaging subsystems (e.g., ultrasound probe head and main processor). IC Role / Device Role / Timing Role: Isolates sensitive analog front-end circuitry from digital backplane noise using differential signaling. Use Value: CMOS low-power operation minimizes self-heating near temperature-sensitive components; 5 V supply simplifies integration with existing medical-grade power rails. |
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 | Higher supply current (35 mA typ.), wider operating temp (–40 to +125 °C), no internal bias resistors. | Preferred in automotive under-hood applications requiring extended temperature range and higher ESD robustness. | Select when ambient temperature exceeds +85 °C or when external biasing is acceptable for tighter layout control. |
| MAX3080CSA+ | Lower propagation delay (12 ns typ.), integrated fail-safe biasing, but only single-channel per package. | Suitable for high-speed point-to-point links where channel density is less critical than timing precision. | Choose for designs prioritizing <15 ns delay and guaranteed fail-safe state, accepting higher per-channel cost and footprint. |
Compared with SN65LBC179D and MAX3080CSA+, the ST26C32ABDR offers optimal balance of quad-channel integration, built-in biasing, and 5 V-only operation-making it ideal for space-constrained industrial control boards where thermal management and BOM simplicity are primary concerns.
Availability
ST26C32ABDR is available at Aetrix Electronics and suitable for industrial PLC backplanes, factory automation serial buses, and medical diagnostic equipment requiring stable component supply and long-term lifecycle assurance.
Supply support for ST26C32ABDR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, sensors, and interface ICs for industrial, automotive, and consumer markets.
The ST26C32ABDR belongs to ST's legacy RS-422/RS-423 interface portfolio, engineered specifically for noise-immune, low-power digital communication in harsh industrial environments with wide ground potential variations.
FAQ
What is the maximum data rate supported by ST26C32ABDR?
The ST26C32ABDR supports up to 20 Mbits/s under specified conditions: CL = 50 pF, VDIFF = 2.5 V, and all outputs loaded and switching. This rating assumes proper termination and controlled impedance traces; actual achievable rate depends on cable length, stubs, and noise environment.
Does ST26C32ABDR require external bias resistors on unused inputs?
No. The ST26C32ABDR integrates internal pull-up and pull-down resistors on each differential input pair, eliminating the need for external biasing components on inactive channels and reducing PCB complexity and cost.
Can ST26C32ABDR operate with a 3.3 V supply?
No. The ST26C32ABDR is specified only for 4.5–5.5 V operation. Its input thresholds, output levels, and internal logic are optimized for 5 V CMOS compatibility; use at 3.3 V violates recommended operating conditions and may result in undefined behavior or failure to meet RS-422 specifications.
How are the two ENABLE pins (4 and 12) functionally connected internally?
Pins 4 and 12 are electrically tied together internally to control all four receivers simultaneously. They are provided as separate pins to improve layout flexibility and reduce trace inductance-especially beneficial in high-noise environments where low-impedance enable routing is critical.
ST26C32ABDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- 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:
- 20Mbps
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
ST26C32ABDR FAQ
1.How can I place an order for ST26C32ABDR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST26C32ABDR 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 ST26C32ABDR reliable?
The price and inventory of ST26C32ABDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST26C32ABDR is usually 5 days.
3.What payment methods are accepted for ST26C32ABDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST26C32ABDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST26C32ABDR?
ST26C32ABDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST26C32ABDR 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 ST26C32ABDR?
For technical support, including ST26C32ABDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST26C32ABDR requirements.
6.How does Aetrix verify that ST26C32ABDR is sourced from the original manufacturer or authorized distributors?
All ST26C32ABDR 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 ST26C32ABDR meets industry standards.
7.What is the process for return or replacement of ST26C32ABDR?
All ST26C32ABDR units undergo pre-shipment inspection (PSI). If there is an issue with ST26C32ABDR, 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 ST26C32ABDR part is unused and in its original packaging.
Return procedure for ST26C32ABDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ST26C32ABDR Tags
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ATA6561-GAQW-N
Microchip Technology
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ATA6561-GBQW-N
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SP485CN-L/TR
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SP485EN-L/TR
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SP485EEN-L/TR
MaxLinear, Inc.
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SP485ECN-L/TR
MaxLinear, Inc.
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THVD1400DR
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