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Texas Instruments SN65HVD11DR
- Part No.:
- SN65HVD11DR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN65HVD11DR.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,850
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Product details
Overview
SN65HVD11DR from Texas Instruments is a 3.3-V, half-duplex RS-485 transceiver in SOIC-8 package, supporting up to 10 Mbps signaling rate, 1/8 unit-load (256-node bus capacity), and ±16-kV HBM ESD protection on bus pins A/B. It features fail-safe receiver operation (open-circuit, shorted-bus, idle-bus), thermal shutdown, and low-power standby mode (1 µA typical). Used in industrial process control networks with multi-drop wiring.
For engineers reviewing the SN65HVD11DR datasheet, SN65HVD11DR pinout, SN65HVD11DR application, or SN65HVD11DR equivalent, key selection criteria include signaling rate (10 Mbps), bus node count (256), common-mode range (–7 V to 12 V), driver enable timing (55 ns enable-to-output), and fail-safe receiver behavior under fault conditions.
Technical Context
The SN65HVD11DR integrates a 3-state differential line driver and a differential line receiver operating from a single 3.3-V supply. Its driver output transition times are optimized for 10 Mbps operation, with propagation delays of 18–40 ns (tPLH/tPHL) and rise/fall times of 10–30 ns under 54-Ω load and 50-pF capacitance.
Receiver functionality includes wide common-mode input range (–7 V to 12 V), hysteresis (35 mV), and fail-safe logic that outputs high when bus is open, shorted, or idle. Driver and receiver enables (DE active-high, RE active-low) support direction control and hot-plug robustness via glitch-free power-up/down sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0 V to 3.6 V - ensures compatibility with modern 3.3-V logic systems and low-power microcontrollers. |
| Signaling Rate | 10 Mbps - supports high-speed industrial communication such as motor drive feedback loops and real-time PLC I/O. |
| Unit Load | 1/8 - allows up to 256 transceivers on a single RS-485 bus without signal degradation. |
| Bus ESD Protection | ±16-kV HBM on A/B pins - eliminates need for external TVS diodes in harsh factory environments. |
| Standby Current | 1 µA typical - enables ultra-low-power sleep modes in battery-backed or energy-harvesting remote nodes. |
| Common-Mode Range | –7 V to +12 V - tolerates ground potential differences between chassis in distributed building automation systems. |
| Fail-Safe Receiver | Outputs logic high during open, shorted, or idle bus conditions - prevents undefined UART framing errors in noisy field wiring. |
Pinout & Package
SN65HVD11DR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with standard JEDEC MS-012AC footprint and 1.27-mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A | Bus input/output | Differential bus terminal (complementary to B); connects directly to RS-485 twisted pair; withstands –7 V to +12 V common-mode. |
| B | Bus input/output | Differential bus terminal (complementary to A); forms balanced transmission pair with A for noise rejection. |
| D | Digital input | Driver data input - accepts TTL/CMOS-level signals from MCU UART TX; controls driver output polarity. |
| DE | Digital input | Active-high driver enable - asserts driver onto bus when high; must be synchronized with RE for half-duplex control. |
| GND | Reference potential | Local ground reference for internal circuitry; separate from bus ground to maintain isolation integrity. |
| R | Digital output | Receiver data output - drives MCU UART RX with CMOS-compatible levels; high-impedance when RE = high. |
| RE | Digital input | Active-low receiver enable - disables receiver output (high-Z) when high; used with DE for direction management. |
| VCC | Supply | 3.0–3.6 V power input - requires local 100-nF ceramic decoupling near pin; not tolerant of >6 V transient overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 1/8 Unit-load capability | Enables 256-node RS-485 networks without bus loading penalties, reducing termination complexity in large-scale utility metering deployments. |
| Fail-safe receiver | Guarantees logic-high R output during open-circuit, shorted-bus, or idle-bus states - prevents UART framing errors and system lockup. |
| Thermal shutdown protection | Disables driver at ~165°C junction temperature - protects against latch-up during sustained bus faults or ambient overheating. |
| Glitch-free hot-plug operation | Prevents false edge generation on R/D pins during live insertion - critical for modular PLC backplanes and field-replaceable I/O modules. |
| Bus-pin short-circuit protection | Sustains continuous operation with A/B shorted to –7 V or +12 V - eliminates fuse or current-limiting circuitry in security station interfaces. |
Applications
| Industrial Process Control | Utility Metering Networks |
|---|---|
Use Scenario: Multi-drop RS-485 network connecting PLC master to 50+ remote I/O modules across factory floor with 300-m cable runs. IC Role / Device Role / Timing Role: Half-duplex transceiver providing robust differential signaling, direction control via DE/RE, and fail-safe receiver output during sensor disconnection. Use Value: Eliminates bus contention and undefined UART states when modules are powered sequentially; 10 Mbps rate supports fast analog scan cycles. |
Use Scenario: AMI (Advanced Metering Infrastructure) concentrator polling 200+ smart electricity meters over underground twisted-pair trunk lines. IC Role / Device Role / Timing Role: Bus node transceiver enabling 1/8 unit-load scalability, ±16-kV HBM protection against lightning-induced surges, and low standby current for battery backup. Use Value: Supports full network addressing without repeaters; 1 µA standby extends 10-year battery life in endpoint meters during grid outage. |
| Building Automation Systems | Electronic Security Stations |
Use Scenario: HVAC controller communicating with thermostats, VAV boxes, and fire dampers over shared RS-485 backbone in commercial high-rise. IC Role / Device Role / Timing Role: Transceiver handling ground potential shifts between floors (up to 12 V common-mode), short-circuit tolerance during conduit damage, and hot-swap maintenance. Use Value: Prevents system-wide communication failure when individual devices are serviced; fail-safe logic avoids false alarm triggers during wiring faults. |
Use Scenario: Central alarm panel interfacing with door access readers, motion sensors, and panic buttons across campus perimeter using daisy-chained RS-485. IC Role / Device Role / Timing Role: Robust physical layer interface with bus-pin ESD protection, thermal shutdown during tamper attempts, and glitch-free power sequencing. Use Value: Survives repeated electrostatic discharge from personnel handling; maintains secure channel integrity during physical intrusion events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-485 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65HVD11D | Same electrical specs and pinout, but supplied in cut-tape (not tape-and-reel); no R suffix. | Identical functional use; differs only in packaging format for manual prototyping vs automated SMT placement. | Select SN65HVD11D for bench evaluation or low-volume hand assembly; SN65HVD11DR is optimized for pick-and-place production. |
| MAX13487EESA+ | Pin-compatible 10 Mbps RS-485 transceiver with integrated auto-direction control (no external DE logic required). | Reduces MCU GPIO count and firmware complexity in space-constrained endpoints like smart sensors. | Choose MAX13487EESA+ when simplifying direction control is prioritized over strict TI ecosystem alignment or legacy design reuse. |
Compared with SN65HVD11D and MAX13487EESA+, the SN65HVD11DR offers identical performance in a tape-and-reel format for high-volume manufacturing, while retaining full manual direction control flexibility - making it ideal for industrial designs requiring deterministic bus arbitration and long-term component availability.
Availability
SN65HVD11DR is available at Aetrix Electronics and suitable for industrial process control, utility metering networks, and building automation systems requiring stable component supply, long lifecycle support, and guaranteed traceability.
Supply support for SN65HVD11DR 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 solutions for industrial, automotive, and communications markets.
The SN65HVD11DR belongs to TI's precision RS-485 transceiver portfolio, engineered for reliability in electrically noisy, multi-node industrial networks where interoperability, ESD resilience, and fail-safe behavior are non-negotiable.
FAQ
What is the maximum signaling rate supported by the SN65HVD11DR?
The SN65HVD11DR supports a maximum signaling rate of 10 Mbps under recommended operating conditions (3.3-V supply, 54-Ω load, 50-pF capacitance). This is confirmed in the Device Comparison Table and Driver Switching Characteristics section of the datasheet. Higher rates risk increased bit error due to inter-symbol interference and are not guaranteed.
Does the SN65HVD11DR include fail-safe receiver functionality?
Yes, the SN65HVD11DR features open-circuit, shorted-bus, and idle-bus fail-safe receiver operation. When the A/B bus lines are disconnected, shorted together, or left floating, the R output defaults to a logic-high state - preventing UART framing errors and ensuring deterministic behavior in field-deployed systems.
What is the bus-pin ESD rating for the SN65HVD11DR?
The SN65HVD11DR provides ±16-kV HBM (Human Body Model) ESD protection on bus pins A and B, as verified in Section 7.2 of the datasheet. This eliminates the need for external TVS diodes in most industrial installations and meets IEC 61000-4-2 Level 4 surge immunity requirements when combined with proper PCB layout.
Can the SN65HVD11DR operate with a 3.0-V supply?
Yes, the SN65HVD11DR is fully specified for operation from 3.0 V to 3.6 V. At 3.0 V, parameters including differential output voltage (≥1.5 V), receiver thresholds, and switching times remain within datasheet limits - enabling compatibility with brown-out tolerant microcontrollers and low-voltage power domains.
How does the SN65HVD11DR handle thermal overload conditions?
The SN65HVD11DR incorporates thermal shutdown protection that disables the driver when junction temperature exceeds ~165°C. Recovery occurs automatically once temperature falls below the hysteresis threshold (~155°C). This prevents permanent damage during sustained bus shorts or high-ambient deployments without requiring external thermal monitoring circuitry.
SN65HVD11DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- RS422, RS485
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Half
- Receiver Hysteresis:
- 35 mV
- Data Rate:
- 10Mbps
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SN65HVD11DR FAQ
1.How can I place an order for SN65HVD11DR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65HVD11DR 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 SN65HVD11DR reliable?
The price and inventory of SN65HVD11DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65HVD11DR is usually 5 days.
3.What payment methods are accepted for SN65HVD11DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65HVD11DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN65HVD11DR?
SN65HVD11DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65HVD11DR 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 SN65HVD11DR?
For technical support, including SN65HVD11DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65HVD11DR requirements.
6.How does Aetrix verify that SN65HVD11DR is sourced from the original manufacturer or authorized distributors?
All SN65HVD11DR 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 SN65HVD11DR meets industry standards.
7.What is the process for return or replacement of SN65HVD11DR?
All SN65HVD11DR units undergo pre-shipment inspection (PSI). If there is an issue with SN65HVD11DR, 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 SN65HVD11DR part is unused and in its original packaging.
Return procedure for SN65HVD11DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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