ISO1452DW - 50Mbps 5kVrms Isolated RS-485/RS-422 | TI
MPN： ISO1452DW ✓ 啟用中ISO1452DW 概覽
An isolated RS-485/RS-422 transceiver is a differential interface IC that transfers data between a logic-domain controller and a long-distance, noise-prone communications bus. Galvanic isolation places a robust isolation barrier between those domains, helping prevent ground-potential differences and ground current from disrupting data transfer or damaging connected equipment. Within the interface hierarchy, ISO1452DW is a bus transceiver, a communications interface IC, and a digital isolation IC.
The principal features include 50-Mbps operation, full-duplex communication, simultaneous transmitter and receiver paths, EMC-protected bus pins, and reinforced 5-kVrms isolation. Operating from both 3.3-V and 5-V supplies allows the device to interface with modern low-voltage controllers as well as established 5-V industrial logic. The wide -40°C to +125°C range supports use in industrial equipment where ambient temperatures may exceed consumer-device limits.
The ISO1452 is positioned for harsh industrial environments rather than short, isolated board-to-board links. Its differential signaling rejects common-mode noise encountered on RS-485 and RS-422 cabling, while the integrated isolation and bus-pin protection improve system resilience. Full-duplex operation provides independent transmit and receive paths, making the device suitable for industrial automation, factory equipment, building controls, and other multidrop or point-to-point industrial communication systems.
Typical applications include factory automation controllers, industrial sensor gateways, motor-control systems, building automation equipment, data acquisition systems, and isolated service interfaces. In these applications, the 50-Mbps rate supports high-speed data transfer, while the 5-kVrms isolation barrier separates the bus from the local logic ground. The 16-pin SOIC package is also easier to assemble than a larger high-voltage isolation module.
Designers should treat the isolation barrier and bus pins as dedicated high-energy interfaces. PCB creepage and clearance must follow the reinforced-isolation requirements in the manufacturer datasheet, bus protection must not be assumed to replace a correctly designed TVS and termination network, and the transceiver must be configured for the intended RS-485 or RS-422 topology. The verified source set does not provide the complete pin assignments or isolation layout dimensions.
This page consolidates the verified manufacturer and distributor information for ISO1452DW, identifies the only substantiated same-package family alternative, and separates known engineering data from values that require confirmation in the manufacturer datasheet before layout or procurement decisions are finalized.
直接替換替代品，適用於 ISO1452DW — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ISO1452DW （相同外形與佔位） — 差異在於 Supported Standards, EMC Protection, Mounting Type, Product Type, Package.
ISO1452BDW
✅ 直接替換✓ 有庫存
$2.4609 / 單位
查看資料表 →ISO1452DW 規格
| Product Type | Isolated full-duplex RS-485/RS-422 transceiver |
| 資料速率 | 50 Mbps |
| Isolation Voltage | 5 kVrms |
| EMC Protection | EMC-protected bus pins |
| Duplex Mode | Full duplex |
| Supported Standards | TIA/EIA RS-485 and TIA/EIA RS-422 |
| Driver Count | 1 driver |
| Receiver Count | 1 receiver |
| Supply Voltage Options | 3.3 V or 5 V |
| Minimum Operating Temperature | -40°C |
| Maximum Operating Temperature | +125°C |
| 封裝 | SOIC-16 (DW) |
| 腳位數 | 16 pins |
| 安裝類型 | SMD/SMT surface mount |
| Transient Protection | IEC electrostatic discharge and electrical fast transient events on bus pins |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
ISO1452DW soic-16 (dw) 腳位配置指南
ISO1452DW（soic-16 (dw) 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： ISO1452DW.
請參閱 資料表 以查看完整腳位配置。
典型應用
ISO1452DW 適用於 6 應用s: Factory Automation Interfaces, Industrial Sensor Gateways, Motor and Motion Control, Building Automation Equipment, Data Acquisition Systems, Industrial Communication Gateways.
Factory Automation Interfaces
The ISO1452DW fits factory automation controllers that must communicate over industrial RS-485 or RS-422 networks at up to 50 Mbps. Its full-duplex configuration provides independent transmit and receive paths, while the 5-kVrms reinforced barrier separates bus-side ground potential from sensitive controller logic. The -40°C to +125°C operating range also accommodates equipment placed near motors, relays, and heated industrial cabinets. Texas Instruments describes the ISO1452 family as noise-immune for harsh industrial environments, and its EMC-protected bus pins target IEC ESD and EFT exposure. PCB layout should preserve the datasheet isolation creepage and clearance, and external surge protection should be selected according to the actual cable and grounding environment.
推薦
Industrial Sensor Gateways
The ISO1452DW is suitable for sensor gateways that collect distributed field data over a differential bus while protecting the host electronics from ground-potential differences. Its 50-Mbps rate supports high-throughput plant data, while full-duplex operation can maintain simultaneous control traffic and status reporting. Reinforced 5-kVrms isolation helps protect the gateway from industrial noise and fault-energy coupling. The device can operate from either 3.3-V or 5-V supplies, which supports both modern embedded controllers and established industrial logic. Designers should use the manufacturer layout requirements for the isolation barrier and verify the exact bus topology, termination, fail-safe behavior, and common-mode limits against the complete datasheet before production release.
推薦
Motor and Motion Control
The ISO1452DW can interface a motion-control controller with external drives, positioning modules, and diagnostic equipment through RS-485 or RS-422. Differential signaling is useful in motor environments where switching transients can appear on wiring, and the transceiver's EMC-protected bus pins are intended for IEC electrostatic-discharge and electrical-fast-transient exposure. The 5-kVrms reinforced isolation barrier separates the control electronics from the bus domain, reducing the effect of ground shifts. At 50 Mbps, the device offers ample bandwidth for command and feedback traffic. Installation still requires careful grounding, cable routing, protection components, and termination design; isolation does not replace surge protection or safe equipotential bonding.
推薦
Building Automation Equipment
The ISO1452DW is appropriate for building controllers, HVAC equipment, access-control panels, and lighting-management systems using RS-485. Reinforced isolation supports reliable communication between building equipment that may share grounding infrastructure, while the 50-Mbps rate accommodates high-density control networks. The 3.3-V and 5-V supply options enable use with embedded control platforms, and the -40°C to +125°C range supports equipment deployed near heat sources. EMC-protected bus pins improve resilience to electrostatic discharge and fast-transient events encountered during installation or maintenance. The final design should use the reinforced-isolation PCB layout, apply suitable bus termination, and follow the manufacturer recommendations for cable length and grounding.
推薦
Data Acquisition Systems
The ISO1452DW can connect data-acquisition equipment to remote sensors, test systems, and laboratory controllers over RS-485 or RS-422. The 50-Mbps bus rate supports high-volume synchronized measurements, while full-duplex operation permits simultaneous acquisition commands and data return. Galvanic isolation reduces the risk that ground differences between test equipment and remote fixtures will disturb measurements or damage inputs. Its dual 3.3-V and 5-V supply compatibility simplifies interface design across acquisition platforms. Engineers should still evaluate cable length, baud-rate derating, differential routing symmetry, grounding, and protection against laboratory transients. The verified source does not provide a complete digital timing table, so timing margins should be calculated from the official datasheet.
推薦
Industrial Communication Gateways
The ISO1452DW is well suited to protocol gateways that bridge an RS-485 or RS-422 field bus with a local processor or network interface. A 50-Mbps rate enables high-speed gateway traffic, and the independent transmit and receive paths support full-duplex protocols. The 5-kVrms reinforced isolation barrier helps segregate the communications domain from sensitive gateway electronics. EMC-protected bus pins target the electrostatic-discharge and electrical-fast-transient conditions common in industrial installations, while the wide temperature range supports equipment outside controlled office environments. To obtain the full benefit, follow the recommended isolation layout, use balanced routing for the differential pair, and select bus protection and termination according to the installation's surge environment.
推薦
推薦產品摘要
工程參考資料，適用於 ISO1452DW — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ISO1452BDW |
|---|---|---|
| Package | SOIC-16 (DW) | SOIC-16 (DW) |
| Brand | Texas Instruments | Texas Instruments |
| Function | Isolated full-duplex RS-485/RS-422 transceiver | Isolated RS-485/RS-422 transceiver |
主要差異化特點
- Reinforced isolation rating (對比ISO1452BDW)
- Verified high-speed full-duplex operation (對比ISO1452BDW)
- Industrial EMC positioning (對比ISO1452BDW)
設計說明
Preserve the reinforced-isolation clearance and creepage defined by the Texas Instruments ISO1452 datasheet. Keep the isolation barrier free of copper and keep high-voltage bus-side and low-voltage logic-side nets physically separated. The verified records confirm 5-kVrms reinforced isolation but do not provide the required dimensional limits, so engineers must obtain those values from the manufacturer layout guidance before placing components or routing the PCB.
Route the RS-485 or RS-422 differential pair as a tightly coupled, impedance-consistent pair over a continuous reference plane. Avoid switching the pair around unrelated signals or splitting it across board regions. Connectors, surge-protection devices, chassis ground, and digital ground should be arranged so surge current is diverted away from the transceiver. Do not treat the integrated EMC protection as permission to omit external protection for an exposed cable.
ISO1452DW and ISO1452BDW must not be treated as electrically identical despite using the same DW package. Texas Instruments support information identifies ISO1452BDW as a basic-isolation part, whereas ISO1452DW provides 5-kVrms reinforced isolation. Before replacing an installed device, confirm the isolation class, working voltage, data rate, pin assignments, bus topology, and supply requirements. A physically matching package alone is not sufficient qualification.
Do not infer the complete pinout from the 16-pin SOIC package designation. The verified web records do not expose individual DW pin assignments, so each signal, supply, ground, and isolation-boundary connection must be checked against the official pin-description table. Incorrectly connecting the logic-side ground, bus-side ground, enable pins, or differential terminals can prevent operation or compromise the isolation barrier.
Use the shortest practical connection to the external bus and apply termination only where required by the selected RS-485 or RS-422 topology. A 50-Mbps capable device does not imply that every cable length can operate at 50 Mbps. Account for baud rate, propagation delay, transceiver timing, connector losses, reflections, and common-mode range when creating a reliable industrial link.
合規資訊
The supplied manufacturer and distributor records do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. IEC electrostatic-discharge and electrical-fast-transient ruggedness is a product feature and is not treated as an AEC-Q100 qualification.
