SN65HVD08D - 3.3/5V 10Mbps RS-485 Transceiver | Texas Instruments
MPN: SN65HVD08D ✓ AktifSN65HVD08D Ringkasan
An RS-485 transceiver is an interface IC that converts logic-level signals into balanced differential signals for communication over a multipoint bus. The differential architecture is part of the broader interface IC hierarchy and is commonly used where noise immunity, wiring distance, and multiple-node connectivity are important. The SN65HVD08 family supports both RS-485 and RS-422-oriented balanced communication while operating from a supply compatible with 3.3-V and 5-V systems.
The SN65HVD08D combines a wide supply range extending to 5.5 V with low quiescent power consumption below 90 mW. Its one-eighth-unit-load receiver allows as many as 256 nodes on one bus, reducing the loading imposed by connected devices. The 10 Mbps signaling rate supports high-speed data paths, while open-circuit, short-circuit, and idle-bus failsafe receiver behavior helps establish a defined state when the bus is not being actively driven.
The bus pins include integrated electrostatic-discharge protection rated at more than 16 kV using the human-body model. The wide operating supply allows operation from a 5-V cable power bus even when the line experiences approximately 2 V of voltage drop, potentially reducing the need for isolated power at every ground-isolated connection. These features make the transceiver suitable for industrial data links, building controls, and distributed instrumentation.
Typical applications include factory-floor fieldbus gateways, industrial PLC serial links, building-automation controllers, remote sensor nodes, and industrial Ethernet interface equipment. Its half-duplex transceiver arrangement requires the controller to manage driver enable and receiver enable functions when the bus direction changes. Designers should also account for termination, fail-safe biasing, grounding, and protection requirements imposed by the installed cable.
A critical design practice is to place the transceiver close to the connector and provide a low-impedance return path to the PCB ground plane. Bus traces should be routed as a balanced pair, with connector surge protection considered for installations exposed to industrial transients. The 8-pin SOIC package supports conventional surface-mount assembly, but exposed bus pins still require careful mechanical and electrical protection.
This page combines manufacturer specifications, distributor availability references, verified drop-in candidates, comparison data, and practical RS-485 design guidance. It also distinguishes confirmed substitutions from candidates that still require engineering review before use in an existing PCB design.
Pilihan pengganti yang segera untuk SN65HVD08D — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
SN75HVD08D
✅ Masuk Drop-In📋 Alternatif rujukan (tidak dalam katalog)
SP3078EEN-L/TR
✅ Masuk Drop-In📋 Alternatif rujukan (tidak dalam katalog)
SN65HVD08D Spesifikasi
| Product Type | Half-duplex RS-485 transceiver |
| Tegangan Pemberi Arus | 3.3/5 V |
| Maximum Supply Voltage | 5.5 V |
| Maximum Data Rate | 10 Mbps |
| Quiescent Power Consumption | Less than 90 mW |
| Receiver Unit Load | 1/8 unit load |
| Maximum Bus Nodes | Up to 256 nodes |
| Bus-Pin ESD Protection | Exceeds 16 kV HBM |
| Driver Output Type | Three-state differential line driver |
| Receiver Type | Differential line receiver |
| Failsafe Receiver Behavior | Open-circuit, short-circuit, and idle-bus failsafe |
| Standards Compatibility | ANSI TIA/EIA-485-A and ISO-8482E |
| Cable-Powered Operation | 5-V power bus with up to 2 V line-voltage drop |
| Kemasan | 8-pin SOIC |
| Jenis Pemasangan | Surface mount |
Panduan Konfigurasi Pin SN65HVD08D 8-pin soic
Konfigurasi pin untuk SN65HVD08D (8-pin soic pakai). Penomeran pin, fungsi, dan garis bentuk koneksi ditakrifkan dalam dokumen pengeluar. Rujuk dokumen untuk kebentuk dan pedoman pengasman.
Tiada data garisan pin yang diperoleh untuk SN65HVD08D.
Rujuk kepada lembaran data untuk konfigurasi pin penuh.
Aplikasi Biasa
SN65HVD08D patut untuk 6 aplikasis: Industrial Fieldbus Gateway, Building Automation Controller, Remote Sensor Network, PLC Serial Communication, Cable-Powered Bus Node, Data Acquisition and Instrumentation.
Industrial Fieldbus Gateway
The SN65HVD08D fits a factory-fieldbus gateway because it supports 10 Mbps signaling, 3.3/5-V operation, and a 1/8-unit-load receiver for as many as 256 bus nodes. The transceiver can bridge a host controller to a balanced RS-485 network while its open-circuit, short-circuit, and idle-bus failsafe receiver provides a defined state when the bus is inactive. The principal design benefit is the combination of high data rate and low loading, although industrial cabinets still need external surge and ESD protection. Verify the actual node count, cable length, topology, and termination before assuming full 256-node operation at 10 Mbps.
Disebarkan
Building Automation Controller
The SN65HVD08D is appropriate for a building-automation controller connected to distributed lighting, HVAC, access, or sensor nodes over an RS-485 bus. Its 1/8-unit-load input allows up to 256 connected nodes, while the 10-Mbps capability provides margin for local control traffic and firmware-oriented message bursts. The 3.3/5-V supply compatibility lets the interface operate beside either 3.3-V or 5-V control electronics. In a building installation, the design should include balanced routing, a solid ground reference, appropriate bus biasing, and connector protection because long cable branches can increase reflected signaling and common-mode stress.
Disebarkan
Remote Sensor Network
The SN65HVD08D can connect remote sensor nodes when a shared balanced bus must accommodate many low-power endpoints. Its one-eighth-unit-load receiver reduces input loading to permit as many as 256 nodes, while the 10-Mbps link rate supports efficient polling and short data frames. The transceiver's failsafe response to open, shorted, and idle buses helps the controller avoid interpreting an undriven bus as valid data. Designers should still keep the cable within the baud-rate-versus-distance envelope, use consistent termination and fail-safe biasing, and ensure that each node's driver-enable and receive-enable logic cannot create contention.
Disebarkan
PLC Serial Communication
The SN65HVD08D is useful in PLC and industrial-control modules that exchange commands over a multipoint RS-485 network. The 10-Mbps rate can accommodate short, high-speed links, while the low receiver loading supports a larger population of field devices than one-unit-load transceivers. Its 3.3/5-V operating range is useful across both legacy 5-V control systems and modern 3.3-V controllers. Practical implementation requires correct DE and RE control, a deterministic state after reset, adequate logic-level compatibility, and careful grounding between cabinets. External protection should be selected from the actual installation's surge, ESD, and transient requirements.
Disebarkan
Cable-Powered Bus Node
The SN65HVD08D is suitable for cable-powered bus nodes because its wide supply range and low quiescent consumption permit operation from a 5-V cable power bus with approximately 2 V of line-voltage drop. This can reduce the need for isolated power generation at every ground-isolated endpoint. The same device simultaneously provides the balanced driver and receiver needed for bidirectional half-duplex communication. The system designer must confirm that the total bus current, voltage drop, transceiver dissipation, and protection-network leakage remain within budget. Isolation boundaries, if required, should be designed separately rather than inferred from the cable-power capability.
Disebarkan
Data Acquisition and Instrumentation
The SN65HVD08D fits data-acquisition equipment that must collect measurements from multiple remotely distributed instruments over a balanced bus. A 10-Mbps signaling rate supports efficient transfer of digital measurement and configuration information, while the 1/8-unit-load receiver allows numerous instrument nodes to share the line. The failsafe receiver behavior is valuable during startup, cable faults, and idle periods because it defines the receiver state when no node is transmitting. For laboratory and industrial installations, preserve the differential pair geometry, keep the transceiver close to the connector, and consider separate protection so that external cable events do not exceed the device's absolute maximum ratings.
Disebarkan
Ringkasan Produk Disebarkan
Data referensi kejuruteraan untuk SN65HVD08D — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini | SN75HVD08D | SP3078EEN-L/TR |
|---|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Brand | Texas Instruments | Texas Instruments | SGS-Thomson Microelectronics |
| Product Type | RS-485 transceiver | RS-485 transceiver | RS-485 transceiver |
| Supply Voltage | 3.3/5 V | 3.3/5 V family operation | 3.3 V application referenced in verified result |
Penyeberangsung Jelas
- Higher verified signaling rate than the SN65HVD78DR comparison option (vsSN65HVD78DR)
- Wide 3.3/5-V supply range (vsSP3078EEN-L/TR)
- Low receiver loading for large networks (vsSN75HVD08D)
Catatan Desain
Route the differential bus as a tightly coupled pair on a continuous reference plane and minimize stubs from the transceiver, protection devices, and connector. Place ESD or surge-protection components close to the connector so transient current returns through a short path rather than through the transceiver ground. Preserve the pair geometry through connector transitions, and confirm that any external protection network does not degrade the 10-Mbps edge rate or upset receiver thresholds.
Do not approve an alternative solely because it uses an 8-pin SOIC footprint. Confirm DE, RE, A, B, VCC, and ground assignments against the SN65HVD08D pin configuration, then compare enable polarity, bus-idle thresholds, receiver failsafe behavior, supply limits, and maximum data rate. The verified distributor result specifically cautions against assuming that SP3078EEN-L/TR is a direct replacement, and the SN75HVD08D evidence likewise does not provide a complete pin-by-pin equivalence statement.
For the stated cable-powered use case, calculate the maximum available transceiver supply after the documented 2-V line drop and include transceiver, protection-device, and bias-network current. The manufacturer states that quiescent power consumption is less than 90 mW, but actual dissipated power changes with supply voltage, load, and bus activity. Do not use the 90-mW figure as a worst-case design allowance for a complete cable-powered node without adding the load and protection-network budget.
Termination and fail-safe biasing are separate design tasks. A termination resistor at each end of the cable limits reflections, while fail-safe biasing establishes a valid state when all drivers are disabled. The SN65HVD08D's open-circuit, short-circuit, and idle-bus failsafe receiver does not remove the need to avoid incorrect resistor values or excessive bias current. Verify the network with the intended cable length, node count, baud rate, and measured termination topology.
Maklumat Kesediaan
The supplied excerpts identify ANSI TIA/EIA-485-A and ISO-8482E interoperability and HBM ESD performance, but they do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. No compliance claim has been inferred.