SN65HVD72D - 3.3V 250kbps Half-Duplex RS-485 | Texas Instruments
MPN: SN65HVD72D ✓ ActiveSN65HVD72D Overview
An RS-485 transceiver is an interface IC that translates between a logic-level UART or digital signal and a differential RS-485 bus. The differential architecture supports noise-resistant communication over longer cable runs than single-ended signaling, while the half-duplex arrangement allows the same pair of bus conductors to support both transmission and reception. In this device, the 3.3 V supply and 250 kbps data rate suit embedded systems, industrial controllers, sensors, and equipment using low-speed field-bus links.
Key verified characteristics include a 3.3 V supply, 250 kbps maximum signaling rate, half-duplex operation, RS-422/RS-485 transceiver functionality, and IEC ESD protection. The SOIC-8 package provides a compact surface-mount footprint for industrial control boards and communication modules. The device is marketed for demanding industrial applications where robust bus interfacing and protection are important.
The SN65HVD72D integrates the physical-layer functions needed to connect a microcontroller or programmable logic controller to a differential RS-485 network. Designers should pay attention to bus biasing, termination, grounding, cable length, and the exact logic-control requirements of the selected family variant. The manufacturer product page and part-details page are the authoritative sources for ordering information, electrical characteristics, and package details.
Typical uses include industrial automation equipment, remote sensor interfaces, building-control systems, instrumentation, and embedded serial networks. Compared with lower-speed or more highly integrated interface solutions, the SN65HVD72D provides a focused 250 kbps half-duplex RS-485 solution with ESD protection in a standard 8-pin SOIC package. This page combines verified manufacturer and distributor information with practical selection guidance, pricing context, and application notes for engineers evaluating the SN65HVD72D.
Drop-in alternatives for SN65HVD72D — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
SN65HVD72DR
✅ Drop-In📋 Reference alternative (not in catalog)
MxL83111E-ADA-R
✅ Drop-In📋 Reference alternative (not in catalog)
SN65HVD72D Specifications
| Supply Voltage | 3.3 V |
| Maximum Signaling Rate | 250 kbps |
| Duplex Mode | Half-duplex |
| Interface Standard | RS-422/RS-485 |
| Number of Drivers | 1 |
| Number of Receivers | 1 |
| ESD Protection | IEC ESD protection |
| Package | 8-pin SOIC (D) |
| Mounting Type | Surface mount |
| Operating Temperature Range | -40 °C to 125 °C |
| Lifecycle Status | Active |
| RoHS Status | Compliant |
SN65HVD72D 8-pin soic (d) Pin Configuration Guide
Pin configuration for SN65HVD72D (8-pin soic (d) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for SN65HVD72D.
Refer to the datasheet for full pin configuration.
Typical Applications
SN65HVD72D is suitable for 6 applications: Industrial Automation Controllers, Remote Sensor Networking, Building Control and HVAC Equipment, Data Acquisition and Instrumentation, Smart Metering and Utility Networks, Embedded Service and Diagnostic Interfaces.
Industrial Automation Controllers
The SN65HVD72D fits industrial automation controllers that connect a 3.3 V embedded processor to a 250 kbps differential RS-485 field bus. Its half-duplex architecture supports bidirectional command and status traffic over one bus pair, while the 3.3 V supply simplifies integration with modern microcontroller logic. The IEC ESD protection feature is particularly relevant when external cables connect the controller to remote sensors, actuators, or production equipment. Designers should still implement correct bus biasing, termination, grounding, and transmit-enable control around the transceiver.
Recommended
Remote Sensor Networking
The SN65HVD72D can connect remote sensor nodes to a 3.3 V controller over a 250 kbps RS-485 bus. Its differential driver and receiver are useful when sensors are distributed across industrial equipment or where cable routing introduces common-mode noise. The 8-pin SOIC package keeps the interface compact, and the -40 °C to 125 °C rating supports a broad range of industrial environments. Bus topology, cable length, termination, and the number of connected nodes must be validated together because the transceiver specification alone does not guarantee network performance.
Recommended
Building Control and HVAC Equipment
The SN65HVD72D is suitable for building-control modules, HVAC controllers, and room-level equipment that use a 250 kbps half-duplex RS-485 backbone. The 3.3 V operating supply aligns with embedded controller logic, while the SOIC-8 package supports compact communication sections on densely populated boards. Half-duplex operation allows command polling and status reporting on shared wiring, provided the controller correctly arbitrates bus direction. ESD protection adds a useful layer of ruggedness, but surge protection and grounding should be added when cables exit the enclosure.
Recommended
Data Acquisition and Instrumentation
The SN65HVD72D can serve as the communication interface in distributed data-acquisition and test-instrumentation equipment. A 250 kbps differential link is appropriate for transferring commands, measurements, and diagnostic records between a controller and remote instrument modules. Its compact SOIC-8 footprint leaves board area for analog or processing circuitry, and the half-duplex mode supports request-response protocols. For bench or industrial deployments, use controlled grounding and cable protection, and verify that latency requirements remain acceptable when the bus is heavily loaded.
Recommended
Smart Metering and Utility Networks
The SN65HVD72D supports smart-metering and utility telemetry nodes that communicate over a shared RS-485 bus. Its 250 kbps rate is suitable for moderate-rate polling networks, while the 3.3 V supply fits low-energy embedded designs. Half-duplex operation is useful for centralized meter polling, and differential signaling helps maintain data integrity across premises or equipment rooms. Installation details such as cable segregation, surge paths, common-mode conditions, and fault behavior remain critical and should be verified against the complete interface design.
Recommended
Embedded Service and Diagnostic Interfaces
The SN65HVD72D can provide a robust service port for embedded equipment such as motor controllers, test fixtures, and remote diagnostics modules. A 250 kbps RS-485 service link allows firmware, configuration data, and status information to be transferred without occupying the primary high-speed interface. The device’s 3.3 V operation and compact SOIC-8 package simplify adoption in space-constrained designs. To avoid contention, firmware must coordinate transmit-enable timing, and the PCB should include the bus protection and grounding required by the deployment environment.
Recommended
Recommended Products Summary
Engineering reference data for SN65HVD72D — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN65HVD72DR | MxL83111E-ADA-R |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | MaxLinear |
| Package | 8-pin SOIC (D) | 8-pin SOIC (D) | 8-pin SOIC (D), pin-compatible according to cross-reference data |
| Interface Standard | RS-422/RS-485 | RS-422/RS-485 family equivalent | RS-485 functional equivalent |
Key Differentiators
- Verified pin-compatible cross-brand sourcing path (vs MxL83111E-ADA-R)
- Same-family alternative with no reported primary-parameter difference (vs SN65HVD72DR)
- Compact 250 kbps industrial interface (vs SN65HVD72DR)
Design Notes
Do not assume that a same-package replacement is automatically safe. The SN65HVD72DR is reported as functionally equivalent to SN65HVD72D, and MaxLinear MxL83111E-ADA-R is listed as pin-compatible, but the replacement review must still confirm supply limits, enable polarity, driver and receiver thresholds, propagation delay, bus loading, fail-safe behavior, and ESD ratings. Keep the original device in the approved-parts list and use the manufacturer datasheet for final substitution approval.
Place the transceiver close to the connector and keep the differential A and B traces as a short, tightly coupled pair. Route the pair away from switching nodes, clocks, and high-current paths; maintain continuous reference-plane support beneath the pair. If external surge or TVS devices are used, verify their capacitance and placement because excessive capacitance or long stubs can degrade edge quality and reduce the usable 250 kbps signaling margin.
Provide a clean 3.3 V supply with local high-frequency bypass placed close to the transceiver supply and ground pins. The supplied verified data confirms the 3.3 V operating supply but does not provide the recommended bypass-capacitor value, so the value must be taken from the manufacturer datasheet and application guidance. Avoid routing bus return current through sensitive digital ground paths, and verify ground offsets across long or externally powered cable segments.
Half-duplex RS-485 requires correct transmit-enable control. Release the driver before the receiver is enabled and allow the bus to return to idle before accepting another transmission; otherwise two active drivers can contend and produce undefined bus voltage. The supplied verified data does not include transition timing values, so software and external-enable timing must be validated against the datasheet rather than estimated.
Compliance Information
RoHS compliance is explicitly reported by the verified FindMyChip listing. The supplied verified data does not explicitly state REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status, so those fields remain unknown.