SN65HVD73D - 20Mbps Full-Duplex RS-485 | TI
부품 번호: SN65HVD73D ✓ 활성SN65HVD73D 개요
An RS-485 transceiver is a physical-layer interface IC that converts low-voltage digital logic signals into differential bus signals and reconstructs logic-level data from a differential bus. It belongs to the transceiver hierarchy within interface ICs and enables robust, point-to-point or multidrop communication over longer distances than single-ended logic interfaces. Full duplex means the driver and receiver can operate simultaneously on separate differential pairs.
The SN65HVD73D's principal features include a 20 Mbps data rate, 70 mV receiver hysteresis, separate active-high driver enable and active-low receiver enable controls, and ±12 kV IEC-rated ESD protection. Its 3 V to 3.6 V operating range is appropriate for 3.3 V systems. The broad -40°C to +125°C temperature range supports industrial and extended-temperature equipment when the complete system qualification permits it.
The integrated driver and receiver provide one RS-485/RS-422 communication channel in full-duplex configuration. Separate enables allow the transmitter and receiver to be disabled independently, and the manufacturer product page states that standby current can be reduced below 5 µA when both functions are disabled. A common ground reference and carefully terminated differential wiring remain necessary for reliable operation.
Typical applications include industrial control networks, factory automation equipment, data acquisition systems, building-automation controllers, and communications between a host controller and a peripheral transceiver. The 20 Mbps capability supports high-speed point-to-point links, while the ±12 kV IEC ESD rating helps protect external bus connectors in electrically noisy environments.
Designers should follow the manufacturer datasheet for transceiver pinout, termination, fail-safe biasing, and differential routing. Keep the RS-485 differential pair routed as a controlled-impedance pair, minimize stub lengths, place termination only where required by the bus topology, and verify grounding and surge-protection requirements for the installed environment.
This product summary consolidates verified manufacturer and distributor information, supply parameters, design guidance, and replacement constraints into one engineering-focused reference. It also clearly distinguishes verified specifications from electrical values that require confirmation from the complete datasheet before schematic release.
드롭인 대체품: SN65HVD73D — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청SN65HVD73D 사양
| Product Type | RS-485/RS-422 Full-Duplex Transceiver |
| Supply Voltage Range | 3 V to 3.6 V |
| Nominal Supply Voltage | 3.3 V |
| Maximum Data Rate | 20 Mbps |
| ESD Protection | ±12 kV IEC |
| Number of Drivers | 1 |
| Number of Receivers | 1 |
| Duplex Mode | Full Duplex |
| Supported Protocols | RS-422 and RS-485 |
| Receiver Hysteresis | 70 mV |
| Driver Enable | Active High |
| Receiver Enable | Active Low |
| Standby Current | Less than 5 µA with driver and receiver disabled |
| 동작 온도 범위 | -40°C to +125°C |
| 패키지 | 14-pin SOIC (D) |
| 실장 유형 | Surface Mount |
| Shipping Packaging | Tube |
| 수명 주기 상태 | Active |
SN65HVD73D 14-pin soic (d) 핀 구성 가이드
SN65HVD73D(14-pin soic (d) 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: SN65HVD73D.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
SN65HVD73D 적합 용도: 6 애플리케이션s: Industrial Automation Fieldbus Interface, Factory Sensor and Actuator Networking, High-Speed Data Acquisition Equipment, Building Automation Controller, Power and Energy Monitoring Equipment, Communications and Network Equipment.
Industrial Automation Fieldbus Interface
The SN65HVD73D fits a high-speed industrial controller that must exchange differential data with remote field equipment while transmitting and receiving at the same time. Its 20 Mbps maximum data rate supports modern machine-control and data-acquisition links, while the 3 V to 3.6 V supply range integrates with 3.3 V logic. The full-duplex architecture uses separate driver and receiver paths, avoiding contention on a shared pair. The ±12 kV IEC ESD rating adds connector-level protection, although surge, immunity, grounding, and cable requirements must be verified separately for the installed machinery.
추천
Factory Sensor and Actuator Networking
The SN65HVD73D can connect a controller to distributed sensors or actuators when the installation benefits from independent transmit and receive paths. Its one-driver, one-receiver configuration and 20 Mbps capability accommodate modern digital equipment, while 70 mV receiver hysteresis helps distinguish valid differential states. Because the device operates from 3 V to 3.6 V, it fits 3.3 V industrial control boards. Designers must plan the differential pair as a controlled-impedance route, minimize branch stubs, and determine whether termination or fail-safe biasing is required at each end of the installed cable.
추천
High-Speed Data Acquisition Equipment
The SN65HVD73D is appropriate for a data-acquisition chassis that must return sensor or instrument data to a host controller over a full-duplex differential link. The 20 Mbps rate provides ample link margin for many short-distance laboratory and industrial cables, and the receiver's 70 mV hysteresis supports clean digital recovery. Its 14-pin SOIC package is practical for conventional surface-mount assembly. At the board level, route the A and B conductors as a pair, provide a low-impedance return path, control connector stubs, and verify receiver thresholds and cable attenuation at the selected operating distance.
추천
Building Automation Controller
The SN65HVD73D can support full-duplex communications between a building controller and remote room or equipment controllers. The 3.3 V operating range suits modern embedded control boards, and the broad -40°C to +125°C specification provides margin for temperature-controlled equipment. Its independent active-high driver enable and active-low receiver enable allow firmware to control the two interface directions, including a low-power state below 5 µA when both are disabled. The finished design still needs appropriate cable routing, grounding, connector protection, and qualification for the building environment.
추천
Power and Energy Monitoring Equipment
The SN65HVD73D is suitable for energy-monitoring equipment that communicates measurements from a remote meter or monitoring unit to a concentrator. Full-duplex operation permits simultaneous command transmission and measurement reporting, while the 20 Mbps capability supports high-speed local links. The 3.3 V supply range and 14-pin SOIC package align with compact embedded control hardware. Ensure that the bus cable is installed according to its environmental class, maintain a continuous reference path between communicating nodes, and separate or filter noisy power stages to avoid coupling disturbances into the differential receiver.
추천
Communications and Network Equipment
The SN65HVD73D can terminate a full-duplex RS-485 or RS-422 link inside routers, gateways, protocol converters, and network-interface modules. Its 20 Mbps maximum rate supports short, high-speed links, while separate enable inputs give the host controller explicit control over the driver and receiver. The ±12 kV IEC ESD protection is useful where an internal board connects to an external panel connector. For reliable operation, keep the transceiver close to the connector, keep the connector-to-transceiver differential route short and impedance-controlled, and validate the complete interface under cable, ground-potential, and transient conditions.
추천
추천 제품 요약
엔지니어링 참조 데이터: SN65HVD73D — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 |
|---|---|
| Brand | Texas Instruments |
| Package | 14-pin SOIC (D) |
| Supply Voltage Range | 3 V to 3.6 V |
| Maximum Data Rate | 20 Mbps |
| Duplex Mode | Full Duplex |
| Drivers/Receivers | 1/1 |
| Supported Protocols | RS-422 and RS-485 |
| Receiver Hysteresis | 70 mV |
| ESD Protection | ±12 kV IEC |
| Operating Temperature Range | -40°C to +125°C |
주요 차별점
- Full-duplex operation with independent enable controls (vs SN65HVD73DR)
- High verified signaling rate (vs SN65HVD06D)
- Panel-interface ESD resilience (vs SN65HVD1470D)
설계 노트
Route the two RS-485 conductors as a controlled-impedance differential pair from the transceiver to the connector, using matched geometry and a continuous reference plane. Keep the transceiver close to the connector, minimize connector-to-IC distance, and avoid stubs that create reflections. Keep unrelated switching nodes and crystal or clock routing away from the receiver input. Where the cable interface crosses a board partition or chassis boundary, provide a defined ground and surge-protection strategy rather than relying only on the transceiver's ±12 kV IEC ESD feature.
Do not assume that every SN65HVD7x-family device is pin-to-pin compatible with the SN65HVD73D. The verified TI ordering information distinguishes devices with fully enabled operation from those with active-high driver enables and active-low receiver enables, but enable polarity alone does not establish package compatibility. Before substituting any family member, compare the official pin assignments, differential output pins, receiver-output pins, enable pins, supply pins, and exposed-pad requirements. Also verify that the candidate supports the intended protocol and data rate.
Use a stable 3.3 V supply within the verified 3 V to 3.6 V operating range, and place local bypass capacitance close to the device's supply and ground connections. Confirm the required capacitor value, voltage rating, and layout against the complete manufacturer datasheet. Keep the receive-side and transmit-side return current within the transceiver ground reference, and avoid sharing narrow ground paths with high-current loads. The manufacturer states that standby current can fall below 5 µA when both driver and receiver are disabled, making enable-state planning important for low-power systems.
Determine termination and fail-safe biasing from the actual cable topology rather than adding components by habit. Full-duplex systems commonly place termination at the ends of each differential pair, while multidrop arrangements require careful analysis of branches and reflections. Evaluate the receiver's 70 mV hysteresis against the cable loss, common-mode noise, ground offset, and transmitted signal amplitude. Use the manufacturer's recommended test conditions to verify the 20 Mbps operating limit with the intended cable length and connector rather than assuming the headline data rate applies to every installation.
규정 준수 정보
The supplied verified data explicitly references IEC ESD protection and an operating range of -40°C to +125°C, but it does not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than being inferred.