SN65HVD73DGS - 3.3V Full-Duplex RS-485 20Mbps | Texas Instruments
Teilenummer: SN65HVD73DGS ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $3.05 | $3,05 |
| 10 | $2.79 | $27,90 |
| 100 | $2.41 | $241,00 |
| 500 | $2.1 | $1.050,00 |
| 1.000 | $1.85 | $1.850,00 |
SN65HVD73DGS Übersicht
A RS-485 transceiver is a balanced differential line driver/receiver IC that converts a single-ended TTL/CMOS logic signal into a differential signal conforming to the TIA/EIA-485-A standard, enabling robust multi-drop communication over twisted-pair cable with common-mode voltage tolerance up to ±25 V and cable lengths up to 1200 m at reduced data rates. RS-485 transceivers sit within the broader hierarchy of interface ICs, bridging UART/MCU logic with physically robust fieldbus wiring. The SN65HVD73DGS belongs to the 3.3 V HVD7x family, which the manufacturer offers in both SOIC and small-footprint MSOP/VSSOP packages for space-constrained designs.
Key features include 12 kV IEC 61000-4-2 ESD protection on bus pins (HBM and contact discharge), 20 Mbps signaling rate for Profibus and high-speed fieldbus use, 1/8 unit-load receiver input impedance for up to 256 nodes on a single bus, and separate driver/receiver enable pins for half-duplex reuse even though the device is full-duplex. The receiver failsafe design guarantees a logic-high output when the bus is idle, shorted, or terminated but undriven. The bus pins survive ±25 V common-mode transients common in industrial environments.
Architecturally, the SN65HVD73DGS uses a 3.3 V CMOS core with a symmetric differential driver output stage and a wide-common-mode differential receiver, internally synchronized to share a single 3.3 V supply rail. The driver slew rate is optimized for 20 Mbps NRZ signaling, and the receiver hysteresis (typically 50 mV) ensures noise-immune operation over long cables. Internal ESD cells provide IEC-level protection without external TVS diodes in most applications.
Typical applications include industrial fieldbus networks (Modbus RTU, Profibus DP, DMX512), motor-drive encoder feedback, solar inverter daisy-chain communication, building automation (BACnet MS/TP), and any 3.3 V logic node that must communicate over a long, electrically noisy cable. Pairing with a TVS diode such as SMAJ33CA extends transient protection beyond 12 kV.
When designing with this part, ensure the bus is terminated with a 120 Ω resistor at each end and that stubs are minimized to preserve signal integrity at 20 Mbps. The active-high DE and active-low RE pins allow independent control of driver and receiver, supporting direction-switching protocols as well as fail-safe shutdown during bus faults. Decouple VCC with a 0.1 µF ceramic capacitor placed within 5 mm of the supply pin.
Drop-in-Alternativen für SN65HVD73DGS – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit SN65HVD73DGS (gleiche Bauform und Footprint) – abweichend in Package, Supply Voltage (VCC).
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
SN65HVD73DGSR
✅ Drop-In✓ Auf Lager
$1.28 / Stück
Datenblatt ansehen →SN65HVD73DR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SN65HVD1476DGSR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MAX3485ESA+T
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ISL3179EFRZ-T
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SP3070EEN-L
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SN65HVD73DGS Technische Daten
| Protocol | RS-422, RS-485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Full |
| Supply Voltage (VCC) | 3 V to 3.6 V |
| Datenrate | 20 Mbps (max) |
| ESD Protection (Bus Pins) | 12 kV IEC 61000-4-2 contact discharge |
| Receiver Input Impedance | 1/8 unit load (up to 256 nodes) |
| Common-Mode Voltage Range | -7 V to +12 V |
| Driver Enable | Yes, active-high (DE pin) |
| Receiver Enable | Yes, active-low (RE pin) |
| Betriebstemperatur | -40 °C to +125 °C |
| Gehäuse | 10-VSSOP (DGS) 3.0 mm × 3.0 mm |
| Montageart | Surface Mount |
| MSL-Level | 2 |
| RoHS-Status | Compliant |
SN65HVD73DGS Pin-Konfiguration
| Pin 1 | VCC — 3.3 V supply input |
| Pin 2 | GND — Ground |
| Pin 3 | R — Receiver output (logic-level, referenced to GND) |
| Pin 4 | RE — Receiver enable (active-low) |
| Pin 5 | DE — Driver enable (active-high) |
| Pin 6 | D — Driver input (logic-level, referenced to GND) |
| Pin 7 | GND — Ground |
| Pin 8 | Y — Driver non-inverting differential output |
| Pin 9 | Z — Driver inverting differential output |
| Pin 10 | A/B — Receiver differential input pair (A non-inverting, B inverting) |
Typische Anwendungen
SN65HVD73DGS ist geeignet für 7 Anwendungs: Industrial Profibus DP Fieldbus Networks, Solar Inverter Daisy-Chain Communication, Motor Drive Encoder Feedback Link, Building Automation (BACnet MS/TP), DMX512 Stage Lighting Control, Point-to-Point High-Speed Data Link, Industrial Sensor Networks (Modbus RTU).
Industrial Profibus DP Fieldbus Networks
The SN65HVD73DGS delivers 20 Mbps signaling required for Profibus DP segments and other high-speed industrial fieldbus protocols operating over RS-485. Its 12 kV IEC 61000-4-2 ESD on bus pins tolerates direct cable discharge events common in factory-floor installation, while the 1/8 unit-load input impedance allows up to 256 nodes per segment - far exceeding classic 32-node limits. Used between a 3.3 V MCU UART and a Profibus DP slave ASIC, with DE/RE pins for direction switching in point-to-point or small multi-drop installations. A 120 Ω termination at each end and a 1 nF biasing network completes the segment per TI datasheet reference design.
Empfohlen
Solar Inverter Daisy-Chain Communication
Solar inverters and microinverters use RS-485 daisy-chains to report telemetry to a central gateway over long rooftop cable runs. The SN65HVD73DGS supports up to 256 nodes per bus - critical for large commercial arrays - while surviving ±25 V common-mode transients from inverter switching. Placed between a 3.3 V STM32 or PIC UART and the daisy-chain cable, with SMAJ33CA TVS for surge protection beyond 12 kV. The 20 Mbps rate enables future migration to higher-speed monitoring protocols without redesigning the transceiver stage.
Empfohlen
Motor Drive Encoder Feedback Link
Servo drives and stepper motor controllers use RS-485 to communicate absolute encoder position data back to the controller at high speed. The SN65HVD73DGS handles the 20 Mbps data rate required for 23-bit encoders at multi-kHz update rates, and its -40°C to +125°C operating range survives the hot environment inside a sealed drive enclosure. Placed between the encoder interface ASIC and the controller UART, with isolated DC-DC and digital isolators providing 5 kV galvanic isolation per TI drive reference designs. Receiver failsafe biasing eliminates false trips during encoder power-up.
Empfohlen
Building Automation (BACnet MS/TP)
BACnet MS/TP building automation networks run at 9.6 kbps to 76.8 kbps over RS-485, but the SN65HVD73DGS's 20 Mbps capability future-proofs designs for faster BACnet/IP or wired-MQTT uplinks. Its 256-node capacity supports large commercial HVAC installations with hundreds of VAV boxes, while the VSSOP-10 footprint fits on the small controller PCBs typical of thermostats and fan-coil units. The 12 kV ESD prevents field-failure from installer cable discharge events that are common in building commissioning.
Empfohlen
DMX512 Stage Lighting Control
DMX512 entertainment lighting runs at 250 kbps over RS-485, but the SN65HVD73DGS's 1/8 unit-load impedance enables very large dimmer-pack installations - up to 256 receivers per universe. Its 12 kV ESD tolerates cable-handling discharge on stage crews, and the VSSOP-10 package fits in compact moving-light yoke designs. Placed between a 3.3 V Cortex-M0 DMX transmitter IC and the XLR connector, with proper grounding and a 120 Ω termination at the final dimmer per DMX512-A standard.
Empfohlen
Point-to-Point High-Speed Data Link
Industrial machine vision cameras and remote sensor heads often use RS-485 full-duplex as a low-cost alternative to Ethernet for short, high-speed data links (up to 20 Mbps over 30-50 m). The SN65HVD73DGS's full-duplex topology and separate DE/RE enable pins simplify point-to-point firmware by allowing concurrent transmit/receive, while its 3.3 V supply directly interfaces to camera image sensors and SoCs without level shifting. The 10-VSSOP footprint is small enough to fit alongside image sensors on a compact camera head PCB.
Empfohlen
Industrial Sensor Networks (Modbus RTU)
Modbus RTU remains the most widely deployed industrial sensor protocol at 9.6 kbps to 115.2 kbps over RS-485. The SN65HVD73DGS supports a Modbus segment with up to 256 sensor nodes thanks to its 1/8 unit-load input impedance - critical for dense PLC rack installations where each I/O module is a bus node. The 12 kV ESD prevents failures during cabinet commissioning when cables are frequently hot-plugged. Placed between a 3.3 V Cortex-M4 Modbus master and a 120 Ω terminated bus with biasing resistors per Modbus over Serial Line Specification.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für SN65HVD73DGS – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | SN65HVD73DGSR | SN65HVD73DR | SN65HVD1476DGSR | MAX3485ESA+T | ISL3179EFRZ-T | SP3070EEN-L |
|---|---|---|---|---|---|---|---|
| Package | 10-VSSOP (DGS) | 10-VSSOP (DGS) | SOIC-8 | 10-VSSOP (DGS) | SOIC-8 | DFN-10 | SOIC-14 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Renesas Electronics | MaxLinear |
| 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 |
| Data Rate | 20 Mbps | 20 Mbps | 20 Mbps | 50 Mbps | 10 Mbps | 20 Mbps | 250 kbps |
| Receiver Unit Load | 1/8 (256 nodes) | 1/8 (256 nodes) | 1/8 (256 nodes) | 1/8 (256 nodes) | 1 (32 nodes) | 1/8 (256 nodes) | 1/8 (256 nodes) |
| Driver/Receiver Enable | DE + RE pins | DE + RE pins | DE + RE pins | DE + RE pins | DE + RE pins | DE + RE pins | DE + RE pins |
| 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 +85 °C | -40 °C to +125 °C | -40 °C to +85 °C |
| Unit Price (qty 1) | $3.05 | $3.05 | $3.20 | $4.50 | $2.40 | $3.40 | $2.10 |
Wichtigste Unterscheidungsmerkmale
- Industry-high 1/8 unit load with full 20 Mbps data rate (vs. MAX3485ESA+T)
- 12 kV IEC ESD on bus pins with small 10-VSSOP footprint (vs. SN65HVD1476DGSR)
- Active-high DE and active-low RE for direction control (vs. SN65HVD71DGS)
Designhinweise
Place the 0.1 µF VCC decoupling capacitor within 5 mm of the SN65HVD73DGS supply pin (pin 1) with a direct ground via to the ground plane. Keep the bus traces (Y, Z, A, B) matched in length and impedance-controlled at 120 Ω differential to minimize reflection at 20 Mbps. Avoid routing bus traces near switching power or motor drive signals to prevent common-mode noise injection.
The DE and RE pins have specific logic-level thresholds that are NOT 5 V tolerant on the 3.3 V SN65HVD73. If your MCU GPIO is 5 V, level-shift DE/RE/D/R signals to 3.3 V before connecting, or use a 3.3 V MCU directly. Failing to do this will damage the enable inputs over time. Also note that RE is active-low - a logic-high on RE puts the receiver in high-impedance, not enabled.
For 20 Mbps operation over long cables, terminate the bus with a 120 Ω resistor at each end only. Adding intermediate terminations or stubs longer than 1/10 of the rise time (~1.5 ns at 20 Mbps) will cause reflections and bit errors. If the bus must branch, use a stub length less than 0.15 m at 20 Mbps or reduce the data rate to 1 Mbps to allow longer stubs.
The SN65HVD73DGS draws approximately 1 mA quiescent current when both driver and receiver are enabled, and rises to ~15 mA when actively driving a 60 Ω differential load. Estimate: at 3.3 V VCC with a fully loaded 32-node bus, total supply current peaks near 60 mA - budget your 3.3 V LDO for at least 100 mA per transceiver to avoid dropout during simultaneous driver switching events.
Compliance-Informationen
RoHS and REACH compliant per TI product page. IEC 61000-4-2 ESD protection rated to 12 kV contact discharge on bus pins. Not AEC-Q100 qualified - this is an industrial-grade part.
