THVD1552D - 5V RS-485 Transceiver, ±18kV IEC ESD, 50Mbps | TI
部品番号: THVD1552D ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.91 | $2.91 |
| 10 | $2.62 | $26.20 |
| 100 | $2.33 | $233.00 |
| 500 | $2.04 | $1,020.00 |
| 1,000 | $1.75 | $1,750.00 |
THVD1552D 概要
A RS-485 transceiver is a physical-layer interface IC that converts the differential logic levels of a UART or controller into the balanced, half-duplex signaling required by the TIA/EIA-485-A standard. As a member of the RS-485/RS-422 interface IC family within the broader interface IC category and signal conditioning/isolation hierarchy, it enables robust multi-drop communication over twisted-pair cable in electrically noisy industrial environments. The THVD15xx family specifically targets rugged industrial applications where IEC-level surge, fast transient, and ESD events would otherwise require external protection components.
Key features include ±18kV IEC 61000-4-2 ESD protection on bus pins, ±2kV IEC 61000-4-4 EFT immunity, a wide common-mode range of -7V to +12V allowing up to 256 nodes on the bus, and thermal shutdown with short-circuit protection on the driver outputs. The receiver failsafe design guarantees a known logic-high output when the bus is open, shorted, or idle, eliminating the need for external biasing resistors.
Internally, the THVD1552D uses a differential line driver with slew-rate control suitable for 50 Mbps signaling, paired with a differential comparator receiver with 50 mV typical input hysteresis. The half-duplex architecture shares bus pins between driver and receiver, and the full-duplex variant (THVD1552) provides separate driver output and receiver input pins.
Typical applications include industrial fieldbus networks (Modbus, PROFIBUS), motor drive encoder links, building automation (BACnet, KNX), solar inverter daisy-chain communications, and any point-to-point or multi-drop RS-485 link requiring IEC-level robustness. Designers typically pair it with a TVS diode array on the bus for additional surge immunity.
When designing with this device, place 100 nF decoupling capacitors as close as possible to the VCC pin and add a 1 µF bulk capacitor on the bus-side supply rail. The exposed pad must be soldered to a continuous ground plane for thermal dissipation. Maintain 100 Ω termination at both cable ends to suppress reflections at 50 Mbps.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: THVD1552D — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: THVD1552D （同一形状・フットプリント） — 相違点: IEC ESD Protection (Bus Pins), Operating Temperature, Package, Protocol.
クイック比較ツール — 並列比較する代替部品を選択:
THVD1452DR
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.54 / 個
データシートを見る →THVD1550DR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
SN65HVD75DR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MAX3485ESA+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SP485EEN-L/TR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
THVD1552D 仕様
| Protocol | RS-485, RS-422 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Full |
| 電源電圧 | 4.5 V to 5.5 V |
| データレート | 50 Mbps (max) |
| IEC ESD Protection (Bus Pins) | ±18 kV (HBM), ±18 kV (IEC 61000-4-2 contact/air) |
| IEC EFT Immunity | ±2 kV (IEC 61000-4-4) |
| Common-Mode Range | -7 V to +12 V |
| Receiver Input Hysteresis | 50 mV (typ) |
| Number of Nodes | Up to 256 |
| 動作温度 | -40 °C to +85 °C |
| パッケージ | 14-pin SOIC (D) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
THVD1552D ピン構成
| ピン 1 | RO — Receiver output (TTL/CMOS logic) |
| ピン 2 | RE — Receiver enable (active-low) |
| ピン 3 | DE — Driver enable (active-high) |
| ピン 4 | DI — Driver input (TTL/CMOS logic) |
| ピン 5 | GND — Ground |
| ピン 6 | A — Non-inverting bus pin (receiver input) |
| ピン 7 | B — Inverting bus pin (receiver input) |
| ピン 8 | Y — Non-inverting driver output |
| ピン 9 | Z — Inverting driver output |
| ピン 10 | NC — Not connected (per datasheet) |
| ピン 11 | NC — Not connected (per datasheet) |
| ピン 12 | NC — Not connected (per datasheet) |
| ピン 13 | NC — Not connected (per datasheet) |
| ピン 14 | VCC — 5V supply input |
主な用途
THVD1552D の用途: 6 件s: Industrial Modbus / PROFIBUS Fieldbus Networks, Motor Drive Encoder / Servo Feedback Links, Building Automation (BACnet / KNX / LonWorks), Solar Inverter Daisy-Chain / Power Monitoring, Point-of-Sale Terminals and Card-Reader Networks, Long-Distance Utility Meter Reading (AMR/AMI).
Industrial Modbus / PROFIBUS Fieldbus Networks
The THVD1552D is purpose-built for industrial Modbus RTU and PROFIBUS DP networks where robust bus protection is mandatory. Its ±18kV IEC 61000-4-2 ESD rating and ±2kV IEC 61000-4-4 EFT immunity let the transceiver survive the air-discharge and inductive-switching transients common on factory floors, eliminating the need for external TVS diode arrays in most designs. The -7V to +12V common-mode range and 1/8 unit-load receiver support up to 256 nodes on a single twisted pair, while the 50 Mbps data rate exceeds the bandwidth of Modbus (typically 19.2 kbps to 115.2 kbps) and PROFIBUS (12 Mbps max). Engineers typically terminate the bus with 120 Ω resistors at both ends and use the DE/RE pins for direction control in half-duplex RS-485 segments.
おすすめ
Motor Drive Encoder / Servo Feedback Links
Industrial servo drives and stepper motor controllers use RS-485 to transmit encoder feedback from remote motors back to the central controller, often across cable runs of 10-50 meters in electrically noisy cabinets. The THVD1552D's ±18kV IEC ESD rating protects the encoder link from discharge events during cable installation and maintenance, while its 50 Mbps data rate handles high-resolution 26-bit encoders at update rates above 10 kHz. The 14-pin SOIC package fits standard servo drive PCB form factors alongside 3.3V/5V logic, and the wide common-mode range tolerates ground-potential differences between the motor and controller cabinets. The failsafe receiver design eliminates false pulses when the encoder cable is disconnected, a critical feature for safety-rated motion systems.
おすすめ
Building Automation (BACnet / KNX / LonWorks)
BACnet MS-TP and LonWorks FTT-10 networks rely on RS-485 as their physical layer for HVAC controllers, lighting panels, and access-control readers throughout commercial buildings. The THVD1552D's integrated IEC ESD protection eliminates the need for external TVS arrays on every BACnet device, reducing BOM cost and PCB area in wall-mount controllers where space is constrained. The full-duplex configuration supports RS-422 four-wire topologies used in larger building automation segments, and the 256-node capability accommodates mid-rise commercial installations with hundreds of field devices per segment. The -40°C to +85°C operating range covers unconditioned mechanical rooms and rooftop enclosures without derating.
おすすめ
Solar Inverter Daisy-Chain / Power Monitoring
String inverters and module-level power optimizers chain together via RS-485 to report per-panel telemetry back to the gateway inverter, often across PV arrays exposed to direct sunlight and weather-coupled surge events. The THVD1552D's ±18kV IEC ESD and ±2kV EFT immunity handle the indirect lightning surges that couple into long rooftop cable runs, reducing field failure rates that would otherwise require truck-rolls for replacement. The 50 Mbps data rate supports both legacy Modbus RTU telemetry and faster proprietary protocols for module-level monitoring. The SOIC-14 package mounts to standard inverter control PCBs that also host STM32 controllers and isolated DC-DC converters for gate-driver bias.
おすすめ
Point-of-Sale Terminals and Card-Reader Networks
Multi-lane retail POS systems use RS-485 to connect checkstands, receipt printers, and EFT terminals to the back-office server over distances up to 100 meters. The THVD1552D's ±18kV IEC ESD rating protects against static discharge when cashiers plug in peripherals during live operation, while its 50 Mbps data rate is more than adequate for transactional traffic. The SOIC-14 footprint fits the compact PCBs of slim POS terminals, and the wide common-mode range tolerates ground differences between mains-powered lanes. Fail-safe receiver operation ensures the system gracefully recovers when a checkstand is disconnected for service.
おすすめ
Long-Distance Utility Meter Reading (AMR/AMI)
Electricity, water, and gas meters in AMR/AMI deployments communicate via RS-485 to concentrators, with cable runs up to 1.2 km in underground utility corridors prone to induced surges from nearby power cables. The THVD1552D's ±18kV IEC ESD rating and integrated EFT immunity provide the ruggedness required for utility-grade AMI equipment, while its 1/8 unit-load receiver enables dense concentrator hubs with hundreds of meters per RS-485 trunk. The -40°C to +85°C operating range covers outdoor meter enclosures in cold climates, and the SOIC-14 package supports automated assembly for high-volume AMI rollouts.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: THVD1552D — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | THVD1452DR | THVD1550DR | SN65HVD75DR | MAX3485ESA+T | SP485EEN-L/TR |
|---|---|---|---|---|---|---|
| Package | 14-pin SOIC (D) | 14-pin SOIC (D) - same | 14-pin SOIC (D) - same | 14-pin SOIC (D) - same | 14-pin SOIC (D) - same | 14-pin SOIC (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices (formerly Maxim) | MaxLinear |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 4.75 V to 5.25 V |
| Data Rate | 50 Mbps | 50 Mbps | 10 Mbps | 50 Mbps | 12 Mbps | 5 Mbps |
| Duplex | Full | Full | Half | Full | Half | Half |
| Number of Nodes | 256 (1/8 unit load) | 256 (1/8 unit load) | 256 (1/8 unit load) | 256 (1/8 unit load) | 32 (1 unit load) | 32 (1 unit load) |
| Common-Mode Range | -7 V to +12 V | -7 V to +12 V | -7 V to +12 V | -7 V to +12 V | -7 V to +12 V | -7 V to +12 V |
主な差別化要因
- Highest integrated IEC ESD rating in RS-485 class （vs MAX3485ESA+T)
- 5x higher data rate than MAX3485 （vs MAX3485ESA+T)
- Full-duplex variant with separate driver outputs and receiver inputs （vs THVD1550DR)
- 256-node capability vs 32 nodes for legacy parts （vs MAX3485ESA+T)
設計ノート
Place a 100 nF ceramic decoupling capacitor as close as possible to the VCC pin (pin 14) of the THVD1552D, with a 10 µF bulk capacitor on the same supply rail. The bus pins (A, B, Y, Z) should be routed as a differential pair with 100 Ω differential impedance on the PCB, using continuous ground reference plane underneath. Keep the trace length from the IC to the connector within 25 mm to minimize common-mode impedance imbalance.
For cable lengths exceeding 10 meters at 50 Mbps, terminate both ends of the RS-485 bus with 120 Ω resistors matching the cable characteristic impedance. Place the termination resistor within 10 mm of the bus connector. Use TVS diode arrays (e.g., PESD1LIN, SMBJ6.0CA) on the bus-side connector for additional surge protection beyond the integrated ±18kV IEC ESD, especially for outdoor installations exposed to direct lightning surges.
Do not leave the DE pin floating — tie DE to GND through a pull-down resistor or drive it from the MCU; a floating DE pin can enable the driver unpredictably and cause bus contention. Similarly, RE must be tied to GND (active-low enable) when the receiver is always needed. In multi-node RS-485 networks, never exceed 256 transceivers on a single bus without active repeaters, and ensure common-mode voltage stays within -7V to +12V under all fault conditions.
Estimated: at 5V supply and 50 Mbps switching into a fully loaded 60 Ω differential bus, the THVD1552D dissipates approximately 200 mW worst-case. The 14-pin SOIC has θJA of approximately 100 °C/W in still air, giving a junction-to-ambient rise of 20 °C — well within the -40°C to +85°C operating range. No heatsink is required, but a continuous ground plane beneath the exposed thermal pad region improves dissipation in enclosed cabinets.
コンプライアンス情報
RoHS and REACH compliant per TI product page. Not AEC-Q100 qualified — not designed for automotive safety-critical applications.
