SN65HVD73DGSR - 3.3V Full-Duplex RS-485, 20Mbps, 12kV ESD | TI
Référence : SN65HVD73DGSR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.55 | $25,50 |
| 100 | $2.1 | $210,00 |
| 500 | $1.78 | $890,00 |
| 1 000 | $1.52 | $1 520,00 |
| 2 500 | $1.28 | $3 200,00 |
SN65HVD73DGSR Présentation
A RS-485 transceiver is a physical-layer interface IC that converts between a low-voltage UART/logic-level signal on the controller side and a balanced differential signal on the bus side. Full-duplex (a.k.a. 4-wire RS-485) uses separate differential pairs for transmit and receive, allowing simultaneous two-way communication. The SN65HVD73 belongs to the broader family of half- and full-duplex RS-485 transceivers -> differential line transceivers -> interface ICs -> integrated circuits in the data-communication hierarchy defined by TIA-485 / EIA-422 standards.
Key features include 3.3-V single-supply operation (compatible with modern low-power MCUs and FPGAs), 20 Mbps maximum data rate, ±30-kV HBM and ±12-kV IEC 61000-4-2 contact-discharge ESD on bus pins, large receiver hysteresis for noise immunity in harsh industrial environments, 1/8 unit-load support that lets up to 256 nodes share one bus, and separate driver-enable (DE) and receiver-enable (RE) pins for direction control and half-duplex reuse. Operating temperature spans -40 °C to +125 °C.
The architecture uses a differential line driver and differential line receiver with a wide common-mode range (typically -7 V to +12 V), allowing reliable communication in installations with large ground-potential differences. Internal slew-rate control and low bus-current loading support PROFIBUS, DMX512, and similar multi-drop protocols at 20 Mbps without external components.
Typical applications include industrial field-bus nodes, motor encoder feedback links, building-automation gateways, solar inverter monitoring, and point-to-point backplane links between 3.3-V controllers. The wide common-mode range and IEC-grade ESD simplify compliance with industrial EMC requirements without external TVS arrays.
When designing with this device, place the 100 nF VCC bypass capacitor as close to pin 10 as possible and use 120 Ω termination only at the two physical ends of the bus. Leave the middle of the bus unterminated to avoid loading reflections. The DE and RE pins let the host power-gate the part in sleep-mode designs by de-asserting both enables.
This page synthesizes distributor pricing, drop-in alternatives from the TI SN65HVD7x family and cross-brand RS-485 ICs in the VSSOP-10 footprint, and practical design notes not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour SN65HVD73DGSR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec SN65HVD73DGSR (même facteur de forme et même empreinte) — différant par Package, Supply Voltage (VCC).
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
SN65HVD72DGSR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SN65HVD75DGSR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SN65HVD1473DGSR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SN65HVD76DGSR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADM3485EARZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX3485ESA+T
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SP3485EN-L/TR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SN65HVD73DGSR Spécifications
| Part Number | SN65HVD73DGSR |
| Manufacturer | Texas Instruments |
| Product Type | RS-485 / RS-422 Full-Duplex Transceiver |
| Supply Voltage (VCC) | 3.0 V to 3.6 V |
| Data Rate (max) | 20 Mbps |
| Number of Drivers / Receivers | 1 / 1 |
| Duplex | Full |
| ESD Protection - HBM (bus pins) | ±30 kV |
| ESD Protection - IEC 61000-4-2 Contact (bus pins) | ±12 kV |
| Unit Load | 1/8 (up to 256 nodes) |
| Plage de température de fonctionnement | -40 °C to +125 °C |
| Boîtier | VSSOP-10 (DGS), 3.00 mm × 3.00 mm, PowerPAD |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
| Enable Pins | DE (driver enable, active-high); RE (receiver enable, active-low) |
Configuration des broches de SN65HVD73DGSR
| Broche 1 | R — Receiver output (logic-level, referenced to GND) |
| Broche 2 | RE — Receiver enable, active-low; tie low for normal operation |
| Broche 3 | DE — Driver enable, active-high; tie high to transmit |
| Broche 4 | DI — Driver input (logic-level, referenced to GND) |
| Broche 5 | GND — Device ground |
| Broche 6 | A — Non-inverting receiver input (RS-485 bus) |
| Broche 7 | B — Inverting receiver input (RS-485 bus) |
| Broche 8 | VCC — 3.3-V supply input; decouple with 100 nF ceramic to GND |
| Broche 9 | Z — Inverting driver output (RS-485 bus) |
| Broche 10 | Y — Non-inverting driver output (RS-485 bus) |
Applications typiques
SN65HVD73DGSR convient pour 7 applications: Industrial Field-Bus Nodes (PROFIBUS / Modbus RTU), Building Automation Gateways (BACnet / KNX bridges), Solar Inverter Monitoring and String Combiner Links, Motor Encoder and Servo Drive Feedback, Point-to-Point Backplane Links Between 3.3-V Controllers, DMX512 Lighting and Stage-Control Networks, Utility-Grade Smart Meter and AMI Concentrator Links.
Industrial Field-Bus Nodes (PROFIBUS / Modbus RTU)
The SN65HVD73DGSR is well suited to industrial PROFIBUS-DP and Modbus RTU slave nodes because its 20 Mbps data rate covers the 12 Mbps PROFIBUS ceiling and its ±12 kV IEC 61000-4-2 contact-discharge ESD rating on the bus pins simplifies compliance with the IEC 61850 / EN 61131-2 industrial EMC envelope. The 3.3-V single-supply rail lets the part connect directly to a 3.3-V STM32 or ESP32 host MCU without external level shifters, while the wide common-mode range tolerates ground-potential differences across long cable runs in factory floors. Used between the isolated bus transformer and the MCU UART, it provides fail-safe biasing and supports 1/8 unit loads so up to 256 nodes can share a segment without repeaters.
Recommandé
Building Automation Gateways (BACnet / KNX bridges)
In BACnet MS-TP and KNX-TP1 building-automation gateways the SN65HVD73DGSR provides the RS-485 physical layer between the building-bus and a 3.3-V gateway MCU. The full-duplex Y/Z driver and A/B receiver pairs allow simultaneous transmit and receive, which is useful for gateway nodes that must echo or re-transmit frames in real time. The ±12 kV IEC ESD rating protects the gateway from installer-induced cable transients, and the small VSSOP-10 footprint fits inside the cramped connector bay of wall-mounted controllers. Termination of 120 Ω at each end of the bus and fail-safe biasing are external, leaving the design flexible for both 2-wire and 4-wire topologies.
Recommandé
Solar Inverter Monitoring and String Combiner Links
The SN65HVD73DGSR serves as the RS-485 link between solar inverters and a string-level monitoring unit, where each inverter reports DC and AC telemetry over a multi-drop bus. The 1/8 unit-load input supports 256 nodes per segment, allowing a single monitoring backbone to span large commercial installations with dozens of string combiners. The -40 °C to +125 °C operating range covers outdoor rooftop enclosures, and the ±30 kV HBM ESD rating on bus pins protects against installer-arcing and induced surges from PV wiring. The full-duplex topology makes it easy to add repeaters or split the bus into multiple galvanically-isolated segments for serviceability.
Recommandé
Motor Encoder and Servo Drive Feedback
Servo drives and absolute-encoder interfaces use the SN65HVD73DGSR to transmit BiSS or EnDat-equivalent encoder feedback over RS-485, taking advantage of the 20 Mbps data rate and full-duplex 4-wire topology for simultaneous clock and data on separate differential pairs. The wide common-mode range of ±12 V tolerates ground bounce in the high-current drive cabinet, while ±12 kV IEC ESD guards against the inductive kickback that occurs when the motor cable is hot-plugged. The small VSSOP-10 footprint fits on the encoder-interface board inside the servo housing, and the 3.3-V supply rail matches modern DSP and FPGA motion controllers.
Recommandé
Point-to-Point Backplane Links Between 3.3-V Controllers
Within multi-board embedded systems, the SN65HVD73DGSR provides a robust differential backplane link between two 3.3-V FPGAs or MCUs separated by 10-30 cm of FR4 trace, where ground bounce and EMI would corrupt a single-ended UART. The 20 Mbps rate supports fast SPI-to-UART bridges, inter-processor communication, and FPGA bit-stream loading. The full-duplex topology allows both processors to communicate concurrently without software-side direction switching, and the 3.3-V VCC matches the host I/O without level shifting. For longer backplanes, the slew-rate-controlled SN65HVD72 variant reduces EMI at the cost of maximum data rate.
Recommandé
DMX512 Lighting and Stage-Control Networks
The SN65HVD73DGSR is widely used as the DMX512 transceiver on stage-lighting fixtures, dimmer packs, and moving-head lights. The DMX512 standard specifies 250 kbps signaling over RS-485; the 20 Mbps capability of this part provides substantial headroom while its ±12 kV IEC ESD protects the fixture from cable handling and stage-rigging static discharge. The 1/8 unit load lets a single controller drive up to 256 fixtures per universe without bus repeaters, and the VSSOP-10 package fits inside compact moving-light housings. The 3.3-V supply matches modern LED-driver MCUs and reduces fixture power consumption compared to legacy 5-V DMX interfaces.
Recommandé
Utility-Grade Smart Meter and AMI Concentrator Links
Advanced Metering Infrastructure (AMI) concentrators use the SN65HVD73DGSR as the RS-485 link between the data-collector board and a downstream row of electricity, water, or heat meters. The wide -40 °C to +125 °C operating range supports outdoor and basement-mounted equipment, while the ±30 kV HBM ESD withstands the inductive transients generated by the meters' contactors during disconnect events. The 1/8 unit-load bus input supports dense meter clusters, and the 3.3-V VCC allows direct connection to the concentrator's MCU without intermediate level translation. Full-duplex operation enables simultaneous meter read-back and command transmission for time-critical billing data.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour SN65HVD73DGSR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | SN65HVD72DGSR | SN65HVD75DGSR | SN65HVD1473DGSR | SN65HVD76DGSR | ADM3485EARZ | MAX3485ESA+T | SP3485EN-L/TR |
|---|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Maxim Integrated | MaxLinear |
| Package | VSSOP-10 (DGS) | VSSOP-10 (DGS) - same | VSSOP-10 (DGS) - same | VSSOP-10 (DGS) - same | VSSOP-10 (DGS) - same | VSSOP-10 / MSOP-10 - same | VSSOP-10 / SOIC-8 (verify) | MSOP-10 / NSOIC-8 (verify) |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Max Data Rate | 20 Mbps | 250 kbps | 20 Mbps | 50 Mbps | 20 Mbps | 10 Mbps | 10 Mbps | 10 Mbps |
| Duplex | Full | Full | Half | Half | Half | Full | Full | Full |
| ESD - HBM | ±30 kV | ±30 kV | ±30 kV | ±30 kV | ±30 kV | ±15 kV | ±15 kV | ±15 kV |
| Unit Load | 1/8 (256 nodes) | 1/8 (256 nodes) | 1/8 (256 nodes) | 1/8 (256 nodes) | 1/8 (256 nodes) | 1 unit load (32 nodes) | 1 unit load (32 nodes) | 1 unit load (32 nodes) |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
Principaux différenciateurs
- ±30 kV HBM ESD exceeds cross-brand competitors (vs ADM3485EARZ / MAX3485ESA+T)
- 1/8 unit-load bus input supports 256-node segments (vs MAX3485ESA+T (1 unit load, 32 nodes))
- Pin-compatible with the entire SN65HVD7x family (vs MAX3485 / ADM3485 (different family ecosystem))
Notes de conception
Place the 100 nF VCC bypass capacitor as close to pin 8 (VCC) as possible, using a wide ground trace to pin 5 (GND) to minimize supply inductance. Keep the differential pair traces (Y/Z and A/B) matched in length to within 5 mm and route them over a continuous ground plane for the 120 Ω characteristic impedance required by TIA-485. Maintain 100 Ω differential and 50 Ω single-ended impedances, and avoid right-angle bends in the bus traces to reduce reflections at 20 Mbps.
Terminate the bus with a 120 Ω resistor at each physical end only; never place a termination in the middle of the bus, as the additional loading causes reflections. For multi-drop RS-485 segments, add fail-safe biasing resistors (typically 680 Ω pull-up to 3.3 V on one line and 680 Ω pull-down to GND on the other) to guarantee a known idle state when no driver is active. The SN65HVD73DGSR internal fail-safe is sufficient for point-to-point links but external biasing is recommended for multi-drop segments to meet the ±200 mV receiver threshold margin.
The VSSOP-10 (DGS) package has a junction-to-ambient thermal resistance of approximately 120-150 C/W depending on PCB copper area, so at 20 Mbps continuous operation the device dissipates only a few tens of milliwatts and no heatsink is required. For dense multi-port designs, expose the PowerPAD on the bottom of the package to a grounded copper pour of at least 25 mm² to reduce thermal impedance by 30-50%. Verify in production with thermal-couple profiling when stacking multiple transceivers next to high-current switching regulators.
Do not use the SN65HVD73DGSR in a 5-V system - it is a 3.3-V-only part and the absolute-maximum VCC is 4.0 V per the SN65HVD7x datasheet. Connecting a 5-V rail will damage the device. When migrating from a 5-V legacy RS-485 transceiver such as the SN75176 or MAX485, verify that the host UART logic levels are 3.3-V compatible; if not, add a level shifter on DI, DE, RE, and RO. Also avoid tying DE and RE together when bus direction switching is software-controlled - the timing skew can cause bus contention and high current spikes.
Informations de conformité
RoHS and REACH compliant per TI product page; lead-free and halogen-free per MSL-2 qualification data. Not AEC-Q100 qualified - the part is targeted at industrial / commercial applications. IEC 61000-4-2 ESD protection on bus pins is rated ±12 kV contact discharge.
