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Texas Instruments SN65HVD251DR
- Part No.:
- SN65HVD251DR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN65HVD251DR.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:12,443
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Product details
Overview
SN65HVD251DR from Texas Instruments is an industrial-grade CAN bus transceiver compliant with ISO 11898, providing differential transmit and receive capability for controller-area network systems operating up to 1 Mbps. It features ±36-V bus-fault protection, high input impedance supporting up to 120 nodes, and low-current standby mode (200 µA typical). It is used in SAE J1939 and NMEA 2000 data bus interfaces within harsh industrial environments.
For engineers reviewing the SN65HVD251DR datasheet, SN65HVD251DR pinout, SN65HVD251DR application, or SN65HVD251DR equivalent, key selection considerations include bus-fault tolerance, slope-control flexibility via Rs pin, thermal shutdown behavior, and compatibility with 5-V CAN controllers in automotive and industrial control networks.
Technical Context
The SN65HVD251DR implements a fully differential driver-receiver architecture with independent enable logic controlled by the RS pin. Its driver supports three operational modes-high-speed (Rs = GND), slope-controlled (Rs = 10–100 kΩ to GND), and low-power standby (Rs ≥ 0.75 × VCC)-each altering rise/fall times and current consumption without changing pinout or protocol behavior.
Receiver functionality includes 100-mV hysteresis (VIT+ = 900 mV, VIT− = 650 mV), ±7 V to +12 V common-mode range, and >600-V/ns noise rejection per Figure 22. Bus pins (CANH/CANL) withstand ±200-V transients per IEC 61000-4-4 and maintain high-impedance isolation when unpowered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | Up to 1 Mbps - enables full-speed CAN FD pre-phase operation and compatibility with SAE J1939 physical layer timing budgets. |
| Bus Fault Protection | ±36 V - prevents latch-up or damage during wiring faults, ground offsets, or battery disconnect events in vehicle or factory-floor installations. |
| Differential Output Voltage (Dominant) | 1.2–3.1 V - ensures robust dominant-state margin across temperature and load, meeting ISO 11898-2 minimum VOD of 1.5 V at 60-Ω termination. |
| Standby Supply Current | 275 µA typical - allows node-level power gating in battery-powered gateways or remote I/O modules without bus disturbance. |
| Common-Mode Input Range | –7 V to +12 V - supports operation across wide supply variances and noisy ground references in industrial PLC backplanes. |
| ESD Protection (CANH/CANL) | ±14 kV HBM - exceeds IEC 61000-4-2 Level 4 requirements, reducing need for external TVS diodes in cost-sensitive designs. |
| Thermal Shutdown Threshold | 165 °C - protects against sustained overcurrent or ambient overheating in enclosed enclosures without external monitoring circuitry. |
Pinout & Package
SN65HVD251DR is housed in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, with standard gull-wing leads and 1.27-mm pitch. The package is RoHS-compliant and rated for industrial temperature range (–40°C to +125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D (Pin 1) | Driver Input | Single-ended TTL/CMOS-compatible TXD signal from CAN controller; LOW drives dominant bus state. |
| GND (Pin 2) | Ground Reference | Primary return path for internal biasing and driver/receiver common-mode reference; must be low-impedance connection to system ground plane. |
| VCC (Pin 3) | Supply Input | 5-V nominal supply; decoupling capacitor (0.1 µF ceramic) required within 10 mm for stable switching performance. |
| R (Pin 4) | Receiver Output | Single-ended RXD signal to CAN controller; active HIGH during recessive bus state, LOW during dominant. |
| VREF (Pin 5) | Reference Output | 0.5 × VCC ±5% buffered voltage source; used for external comparator bias or diagnostic monitoring circuits. |
| CANL (Pin 6) | Bus Terminal | Low-side differential CAN bus line; internally biased to VCC/2 in recessive state; tolerates –36 V to +36 V fault conditions. |
| CANH (Pin 7) | Bus Terminal | High-side differential CAN bus line; complements CANL to generate differential signaling; shares same fault protection and ESD rating. |
| RS (Pin 8) | Mode Control | Three-state logic input selecting high-speed (GND), slope-controlled (10–100 kΩ pull-down), or standby (≥0.75 × VCC) operation. |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-free hot-plug bus protection | Prevents false dominant pulses during power-up/down sequences - eliminates bus arbitration errors when nodes are inserted or removed live. |
| Unpowered node isolation | Bus pins present >100 kΩ impedance when VCC = 0 V - avoids loading or disrupting active CAN segments during maintenance or partial system power-down. |
| Slope control via external resistor | Adjustable slew rate (2–15 V/µs) using single Rs resistor - enables EMI optimization without redesigning PCB layout or adding filtering components. |
| DeviceNet Vendor ID #806 | Factory-programmed identifier enabling plug-and-play integration into DeviceNet networks without custom configuration or firmware updates. |
| Thermal shutdown with automatic recovery | Halts driver output at 165 °C junction temperature and resumes normal operation once TJ drops below 150 °C - provides self-protecting operation under overload or poor heatsinking. |
Applications
| Industrial Automation | Commercial Vehicle Telematics |
|---|---|
Use Scenario: Distributed I/O modules communicating over CANopen in factory machine control cabinets with shared 24-V DC power rails and variable ground potentials. IC Role / Device Role / Timing Role: Physical-layer transceiver bridging microcontroller UART to twisted-pair CAN bus; maintains signal integrity despite ±7 V common-mode offsets and fast-switching motor drive noise. Use Value: ±36-V bus-fault tolerance prevents field failures due to accidental 24-V shorts to CANH/CANL; high input impedance allows daisy-chaining of >100 sensor nodes on single trunk line. | Use Scenario: Engine control unit (ECU) gateway aggregating J1939 messages from multiple subsystems (ABS, transmission, HVAC) before forwarding to telematics module. IC Role / Device Role / Timing Role: High-reliability CAN PHY with 1-Mbps capability and thermal shutdown - ensures deterministic latency and fault containment during engine cranking or alternator load dump events. Use Value: Slope control via Rs resistor reduces radiated emissions below CISPR 25 Class 5 limits; ±200-V transient immunity meets ISO 7637-2 Pulse 1/2/3a/3b requirements. |
| Marine Navigation Systems | Building Management Controllers |
Use Scenario: NMEA 2000 backbone connecting GPS, autopilot, depth sounder, and AIS transceivers on aluminum-hulled vessels with galvanic corrosion risks. IC Role / Device Role / Timing Role: Isolated CAN transceiver interfacing 3.3-V microcontrollers to 12-V marine bus; handles ground potential differences between isolated equipment racks. Use Value: Unpowered-node isolation prevents bus lockup if GPS module loses power; 14-kV HBM ESD rating survives repeated docking/undocking static discharges. | Use Scenario: HVAC controller in commercial building integrating BACnet/IP gateway with legacy CAN-based damper actuators and temperature sensors. IC Role / Device Role / Timing Role: Low-quiescent-current CAN interface enabling always-on monitoring while drawing <300 µA in standby - extends battery backup runtime during utility outages. Use Value: VREF output provides stable 2.5-V reference for analog sensor ADCs; thermal shutdown prevents thermal runaway in sealed ceiling-mounted enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CAN transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65HVD230DR | Lower quiescent current (150 µA standby), no VREF pin, fixed high-speed mode only (no Rs slope control) | Better suited for ultra-low-power battery nodes where slope tuning is unnecessary and board space is constrained | Select SN65HVD230DR when minimizing sleep current is critical and EMI control via slew rate adjustment is not required. |
| TJA1051T/3/1 | Higher ESD rating (±8 kV contact per IEC 61000-4-2), integrated wake-up functionality, no VREF output | Preferred for automotive body electronics requiring wake-on-CAN and stricter EMC compliance beyond industrial standards | Choose TJA1051T/3/1 when automotive qualification (AEC-Q100 Grade 2), wake-up capability, or higher contact ESD immunity are mandatory. |
Compared with SN65HVD230DR and TJA1051T/3/1, the SN65HVD251DR uniquely combines slope control, VREF output, and industrial temperature range in a single SOIC-8 package - making it optimal for design flexibility in non-automotive embedded systems requiring both EMI tuning and diagnostic support.
Availability
SN65HVD251DR is available at Aetrix Electronics and suitable for industrial automation, commercial vehicle telematics, and marine navigation systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN65HVD251DR 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 since 1930.
The SN65HVD251DR belongs to TI's industrial CAN transceiver product line, designed specifically for robust serial communication in electrically noisy, high-reliability environments such as factory automation, heavy equipment, and marine electronics.
FAQ
What is the maximum signaling rate supported by the SN65HVD251DR?
The SN65HVD251DR supports signaling rates up to 1 Mbps under recommended operating conditions. This rate is validated across the full industrial temperature range (–40°C to +125°C) and with 60-Ω bus termination. At higher temperatures or with longer stub lengths, derating may be necessary to maintain bit error rate compliance with ISO 11898-2.
How does the RS pin on the SN65HVD251DR affect device operation?
The RS pin on the SN65HVD251DR selects among three operational modes: grounding RS enables high-speed mode (fastest rise/fall times); connecting RS to 10–100 kΩ to GND enables slope control (adjustable slew rate from ~2 V/µs to ~15 V/µs); applying ≥0.75 × VCC to RS activates low-current standby mode (275 µA typical ICC). Each mode retains full receiver functionality and bus fault protection.
Does the SN65HVD251DR require external components for basic CAN bus operation?
Yes - the SN65HVD251DR requires a 0.1-µF ceramic decoupling capacitor between VCC and GND placed within 10 mm of the device. For slope control, an external resistor from RS to GND is needed. Termination resistors (typically 120 Ω) must be placed at each bus end. No external biasing or level-shifting components are required for standard 5-V CAN controller interfacing.
What is the purpose of the VREF pin on the SN65HVD251DR?
Pin 5 (VREF) on the SN65HVD251DR provides a buffered 0.5 × VCC reference voltage (±5% tolerance, ±50 µA load capability). It is commonly used to bias external comparators for bus fault detection, calibrate ADC references for analog sensor inputs, or serve as a stable midpoint for differential receiver diagnostics - eliminating need for external voltage dividers.
Can the SN65HVD251DR be used in automotive applications?
The SN65HVD251DR is specified for industrial temperature range (–40°C to +125°C) and meets ISO 11898-2 physical layer requirements, but it is not AEC-Q100 qualified. While functionally compatible with many automotive CAN buses, it lacks automotive-specific validation (e.g., extended life testing, humidity resistance, or stringent ESD test protocols). For production automotive use, TI recommends AEC-Q100-qualified alternatives like the TCAN1042 or TJA1051.
SN65HVD251DR 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:
- CANbus
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Half
- Receiver Hysteresis:
- 100 mV
- Data Rate:
- 1Mbps
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SN65HVD251DR FAQ
1.How can I place an order for SN65HVD251DR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65HVD251DR 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 SN65HVD251DR reliable?
The price and inventory of SN65HVD251DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65HVD251DR is usually 5 days.
3.What payment methods are accepted for SN65HVD251DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65HVD251DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN65HVD251DR?
SN65HVD251DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65HVD251DR 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 SN65HVD251DR?
For technical support, including SN65HVD251DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65HVD251DR requirements.
6.How does Aetrix verify that SN65HVD251DR is sourced from the original manufacturer or authorized distributors?
All SN65HVD251DR 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 SN65HVD251DR meets industry standards.
7.What is the process for return or replacement of SN65HVD251DR?
All SN65HVD251DR units undergo pre-shipment inspection (PSI). If there is an issue with SN65HVD251DR, 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 SN65HVD251DR part is unused and in its original packaging.
Return procedure for SN65HVD251DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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