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Texas Instruments SN65HVD72DRBR
- Part No.:
- SN65HVD72DRBR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
SN65HVD72DRBR.pdf
- Description:
- IC TRANSCEIVER HALF 1/1 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:9,009
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Product details
Overview
SN65HVD72DRBR from Texas Instruments is a 3.3-V RS-485 transceiver IC with half-duplex operation, 250-kbps signaling rate, ±12-kV IEC 61000-4-2 contact ESD protection, 80-mV receiver hysteresis, and <2-µA standby supply current. It serves as the physical-layer interface in industrial fieldbus nodes requiring robust noise immunity and low-power operation over long cable runs.
For engineers reviewing the SN65HVD72DRBR datasheet, SN65HVD72DRBR pinout, SN65HVD72DRBR application, or SN65HVD72DRBR equivalent, this device is selected for cost-sensitive, thermally constrained factory automation and motion control systems where bus fault tolerance, wide common-mode range (–7 V to 12 V), and glitch-free power sequencing are critical design requirements.
Technical Context
The SN65HVD72DRBR integrates a single 3.3-V differential driver and receiver in half-duplex configuration, with independent DE (active-high driver enable) and RE (active-low receiver enable) control logic. Its bus I/O pins feature integrated protection against ±12 kV IEC 61000-4-2 contact discharge and ±4 kV IEC 61000-4-4 fast transient bursts.
It operates across –40°C to 125°C, supports 5-V-tolerant logic inputs, and delivers 1.5–2.0 V differential output voltage into 54-Ω RS-485 loads. Receiver threshold hysteresis is fixed at 80 mV, and driver disable time is ≤400 ns - enabling rapid bus arbitration in multi-node networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signaling Rate | Up to 250 kbps - supports legacy industrial protocols like Modbus RTU without timing margin violation. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with standard 3.3-V LDOs; 5-V tolerant logic inputs allow direct interfacing with 5-V microcontrollers. |
| ESD Protection | ±12 kV IEC 61000-4-2 contact discharge - eliminates need for external TVS diodes on A/B bus lines in most industrial enclosures. |
| Receiver Hysteresis | 80 mV - rejects common-mode noise and ground bounce up to 80 mV peak-to-peak on long cables. |
| Standby Current | <2 µA - enables ultra-low-power sleep modes in battery-backed or energy-harvested sensor nodes. |
| Common-Mode Range | –7 V to +12 V - supports multi-point RS-485 networks with ground potential differences across distributed equipment. |
| Unit Load | 1/8 unit load - allows up to 256 nodes on a single bus segment per TIA/EIA-485 standard. |
Pinout & Package
VSSOP-8 (DRB) package: 3.00 mm × 3.00 mm body, 0.65 mm lead pitch, exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| R | Receiver output | Digital logic-level output (3.3-V CMOS) reflecting bus state; high-impedance when RE = high. |
| RE | Receiver enable (active-low) | Assert low to enable receiver; high disables output and reduces bus loading during idle. |
| DE | Driver enable (active-high) | Assert high to enable driver; low places A/B outputs in high-impedance fail-safe state. |
| D | Driver data input | CMOS-compatible input accepting 0 V / VCC logic levels; inverted internally to drive B terminal. |
| GND | Ground reference | Local signal return; must be tied to system ground with low-inductance path to minimize ground bounce. |
| A | Bus I/O (non-inverting) | Differential bus terminal; driven high during logic '1' transmission; receives complementary signal in receive mode. |
| B | Bus I/O (inverting) | Differential bus terminal; driven low during logic '1'; complements A for differential signaling. |
| VCC | 3.3-V supply | Power input for internal circuitry; requires local 100-nF ceramic decoupling capacitor placed ≤2 mm from pin. |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-free power-up/down | Prevents bus contention by holding A/B in high-Z until VCC stabilizes above 2.0 V and remains stable for ≥100 µs. |
| Low quiescent current | 950 µA max ICC (driver + receiver enabled) - enables continuous monitoring in always-on industrial gateways without thermal derating. |
| Wide temperature range | –40°C to +125°C operation - qualified for under-hood automotive subsystems and uncooled factory PLC modules. |
| Robust bus I/O | Withstands ±15 kV HBM and ±4 kV IEC 61000-4-4 burst - meets EN 61000-6-2 industrial immunity requirements out-of-box. |
| Fail-safe receiver | Outputs logic high when bus is open, shorted, or idle - ensures defined UART input state during cable faults or node removal. |
Applications
| Factory Automation | Telecommunications Infrastructure |
|---|---|
Use Scenario: Distributed I/O modules communicating via Modbus RTU over 300-m shielded twisted-pair cable in a metal enclosure with variable ground potentials. IC Role / Device Role / Timing Role: Physical-layer transceiver providing half-duplex RS-485 interface between ARM Cortex-M4 controller and remote analog/digital I/O banks. Use Value: 80-mV hysteresis rejects motor-drive EMI; ±12-kV ESD rating eliminates external protection components; <2-µA standby current extends backup battery life in supervisory units. |
Use Scenario: Remote radio unit (RRU) baseband board connecting to centralized unit (CU) via RS-485 backhaul link in outdoor telecom cabinet with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Isolated bus interface IC translating FPGA GPIO signals to differential RS-485 for clock synchronization and firmware update commands. Use Value: –40°C to +125°C rating ensures reliability in uncooled enclosures; 250-kbps rate matches legacy OAM protocol timing; VSSOP-8 footprint saves PCB area near RF sections. |
| Motion Control | Building Management Systems |
Use Scenario: Servo drive controller receiving position setpoints and reporting status over daisy-chained RS-485 network in high-vibration CNC machine tool environment. IC Role / Device Role / Timing Role: Half-duplex transceiver managing bidirectional command/response traffic between motion controller and multiple axis drives. Use Value: Glitch-free power sequencing prevents spurious commands during brown-out recovery; 1/8-unit load allows >200 nodes on single trunk line; ±7 V to +12 V common-mode range accommodates ground shifts across large machinery frames. |
Use Scenario: HVAC controller panel collecting temperature, humidity, and valve position data from 50+ field sensors deployed across multi-story commercial building via RS-485 bus. IC Role / Device Role / Timing Role: Low-power bus interface IC enabling always-on polling of sensor nodes powered by local 3.3-V regulators. Use Value: <2-µA standby current minimizes total system quiescent draw; SOIC/VSSOP package options support both through-hole and space-constrained SMT layouts; fail-safe output prevents false alarms during sensor disconnection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RS-485 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65HVD75DRBR | 20-Mbps signaling rate, 168.7°C/W RθJA (VSSOP), higher dynamic ICC (≤1.95 mA) | Used where faster polling cycles or deterministic latency is required (e.g., real-time servo feedback loops) | Select SN65HVD75DRBR only if 250-kbps is insufficient; pinout and package identical but not drop-in due to timing-critical layout changes. |
| MAX13487EESA+ | 3.3-V supply, 250-kbps, ±15-kV ESD, auto-direction control (no DE/RE pins), 1.2-µA shutdown current | Suitable for microcontroller UARTs lacking GPIO for DE/RE control; eliminates two control lines and associated firmware logic. | Choose MAX13487EESA+ when simplifying control interface is prioritized over discrete enable flexibility; different pinout and no RE/DE mapping. |
Compared with SN65HVD72DRBR, SN65HVD75DRBR trades lower power for higher speed, while MAX13487EESA+ replaces manual direction control with automatic sensing - making SN65HVD72DRBR optimal for deterministic, low-power, manually managed RS-485 buses in harsh environments.
Availability
SN65HVD72DRBR is available at Aetrix Electronics and suitable for factory automation, motion control, and building management systems requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.
Supply support for SN65HVD72DRBR 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 SN65HVD7x family was designed specifically for ruggedized RS-485 communication in extended-temperature industrial environments, emphasizing ESD resilience, low power, and interoperability with legacy fieldbus infrastructure.
FAQ
What is the maximum cable length supported by SN65HVD72DRBR at 250 kbps?
At 250 kbps, SN65HVD72DRBR supports up to 300 meters of standard 120-Ω twisted-pair cable under typical industrial conditions. This assumes proper termination, grounding, and noise margins; actual length depends on cable quality, stub length, and EMI environment. The device's 80-mV receiver hysteresis and wide common-mode range (–7 V to +12 V) help maintain signal integrity over extended distances in SN65HVD72DRBR deployments.
Does SN65HVD72DRBR require external bus termination resistors?
Yes, SN65HVD72DRBR requires external 120-Ω termination resistors at both ends of the RS-485 bus to prevent signal reflections. The device itself does not integrate termination; its 54-Ω differential output impedance is matched to standard RS-485 loads. Proper termination is essential to achieve reliable 250-kbps operation - especially in multi-drop configurations where SN65HVD72DRBR is commonly deployed.
Can SN65HVD72DRBR operate with a 5-V microcontroller I/O interface?
Yes, SN65HVD72DRBR features 5-V-tolerant logic inputs (D, DE, RE), allowing direct connection to 5-V microcontrollers without level-shifting circuitry. Its VCC supply remains at 3.3 V, and all internal logic operates at that level. This compatibility simplifies system integration where SN65HVD72DRBR interfaces with legacy 5-V controllers while maintaining low-power 3.3-V bus operation.
What is the thermal shutdown behavior of SN65HVD72DRBR?
SN65HVD72DRBR activates thermal shutdown at 170°C junction temperature, disabling driver outputs to prevent damage. Recovery occurs automatically once TJ falls below ~155°C hysteresis threshold. This protection is independent of ambient conditions and ensures safe operation even under sustained overload or poor PCB heat dissipation - a key reliability feature in sealed SN65HVD72DRBR-based industrial modules.
Is SN65HVD72DRBR pin-compatible with other devices in the SN65HVD7x family?
Yes, SN65HVD72DRBR shares identical VSSOP-8 (DRB) pinout and package dimensions with SN65HVD75DRBR and SN65HVD78DRBR. However, signaling rates differ (250 kbps vs. 20/50 Mbps), and dynamic current consumption varies significantly. While PCB layout is reusable, firmware timing and power delivery must be validated per device - SN65HVD72DRBR cannot be substituted without verifying system-level timing margins.
SN65HVD72DRBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Transceiver
- Protocol:
- RS422, RS485
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Half
- Receiver Hysteresis:
- 80 mV
- Data Rate:
- 250kbps
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SON (3x3)
SN65HVD72DRBR FAQ
1.How can I place an order for SN65HVD72DRBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN65HVD72DRBR 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 SN65HVD72DRBR reliable?
The price and inventory of SN65HVD72DRBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN65HVD72DRBR is usually 5 days.
3.What payment methods are accepted for SN65HVD72DRBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN65HVD72DRBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN65HVD72DRBR?
SN65HVD72DRBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN65HVD72DRBR 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 SN65HVD72DRBR?
For technical support, including SN65HVD72DRBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN65HVD72DRBR requirements.
6.How does Aetrix verify that SN65HVD72DRBR is sourced from the original manufacturer or authorized distributors?
All SN65HVD72DRBR 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 SN65HVD72DRBR meets industry standards.
7.What is the process for return or replacement of SN65HVD72DRBR?
All SN65HVD72DRBR units undergo pre-shipment inspection (PSI). If there is an issue with SN65HVD72DRBR, 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 SN65HVD72DRBR part is unused and in its original packaging.
Return procedure for SN65HVD72DRBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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