ISO1452BDW - 50Mbps Isolated RS-485/RS-422 | Texas Instruments
料号： ISO1452BDW ✓ 量产中ISO1452BDW 概述
An isolated RS-485 or RS-422 transceiver is an interface IC that transfers differential data across a communication link while electrically separating the equipment-side circuitry from the bus-side circuitry. In the signal hierarchy, it belongs to the RS-485/RS-422 transceiver class, within interface ICs and broader semiconductor devices. Galvanic isolation limits fault-current and ground-potential pathways between connected systems while enabling communication across substantial isolation barriers.
The ISO1452BDW combines 50-Mbps data capability, full-duplex operation, RS-485 and RS-422 compatibility, and EMC protection in one 16-SOIC device. Its differential bus interface is suitable for industrial control, instrumentation, and data-acquisition systems where reducing common-mode interference is important. The integrated 3-channel digital isolator also allows a host-side digital interface to cross the same isolation barrier.
Texas Instruments describes the family as compatible with TIA/EIA-485-A and built around a silicon-dioxide capacitive isolation barrier. The 5-kVrms withstand rating and 1500-VPK working voltage provide quantified isolation capability. Because the exact detailed electrical limits and timing values are not included in the supplied verified extracts, parameters such as receiver thresholds, propagation delay, supply current, and temperature limits must be confirmed in the manufacturer datasheet before release.
Typical applications include industrial RS-485 networks, isolated RS-422 point-to-point links, factory automation equipment, motor-control systems, and instrumentation requiring a high-speed isolated data interface. Full-duplex operation allows separate transmitting and receiving paths, which can simplify communication timing compared with a shared half-duplex bus.
PCB design should preserve the isolation boundary, minimize differential-trace asymmetry, provide the capacitor and supply networks recommended by the manufacturer, and avoid placing unprotected copper or assembly features across the isolation barrier. The 16-pin wide-body SOIC footprint should be checked against its creepage, clearance, and pad geometry before layout.
This page consolidates the verified manufacturer and distributor facts for ISO1452BDW, distinguishes documented capability from data still requiring datasheet confirmation, and provides a conservative replacement guide for engineers evaluating same-package alternatives.
直接替换替代料： ISO1452BDW ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ISO1452BDW （相同外形与封装尺寸） ——差异在于 EMC Protection, Mounting Type, Product Type, Supported Standards.
ISO1452DWR
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →ISO1452DW
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →ISO1452BDWR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ISO1452BDW 规格参数
| Product Type | Isolated RS-485/RS-422 transceiver |
| Manufacturer | Texas Instruments |
| Maximum Data Rate | 50 Mbps |
| Duplex Mode | Full duplex |
| Supported Standards | TIA/EIA-485-A, RS-485, RS-422 |
| Isolation Withstand Voltage | 5 kVrms |
| Isolation Working Voltage | 1500 VPK |
| Digital Isolation Channels | 3 channels |
| Isolation Barrier Technology | Silicon-dioxide capacitive isolation barrier |
| EMC Protection | EMC protected |
| Package Type | 16-pin wide-body SOIC |
| 安装类型 | Surface mount |
| Terminal Count | 16 terminals |
| Automotive Temperature Grade | Automotive |
| Receiver Count | 1 receiver |
| Transmitter Count | 1 transmitter |
ISO1452BDW 16-pin wide-body soic 引脚配置指南
ISO1452BDW（16-pin wide-body soic 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： ISO1452BDW.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ISO1452BDW 适用于 6 应用s: Industrial RS-485 Automation Networks, Isolated RS-422 Point-to-Point Links, Factory Motor-Control Isolation, Instrumentation and Data-Acquisition Systems, Medical and Diagnostic Equipment, Isolated Building and Energy-Control Networks.
Industrial RS-485 Automation Networks
The ISO1452BDW fits industrial automation networks requiring isolated RS-485 communication between a controller and field equipment. Its 50-Mbps maximum data rate provides substantial link margin, while full-duplex operation permits simultaneous transmission and reception. The 5-kVrms isolation withstand rating and 1500-VPK working voltage help separate the controller ground domain from the bus-side interface. The 16-pin wide-body SOIC package also provides a practical isolation boundary on the PCB. Designers should use the manufacturer datasheet to confirm logic thresholds, timing, external capacitance, and bus loading.
推荐
Isolated RS-422 Point-to-Point Links
The ISO1452BDW supports isolated point-to-point RS-422 links where full-duplex data flow and high signaling speed are important. At up to 50 Mbps, the transceiver is suitable for equipment connections that exceed the rate of many conventional RS-422 transceivers. Its 3-channel digital isolator can carry related control signals across the isolation barrier. The 5-kVrms rating supports robust separation between connected systems, but cable length, termination, skew, and propagation-delay margins must be evaluated together because a high IC data rate does not remove channel-level limitations.
推荐
Factory Motor-Control Isolation
The ISO1452BDW is appropriate for factory motor-control and industrial drive modules where a control processor must communicate through an isolation barrier. Full-duplex RS-485/RS-422 operation can support simultaneous command and feedback traffic, while the 50-Mbps capability offers useful timing margin. The 5-kVrms isolation withstand rating and 1500-VPK working voltage help manage galvanic separation between control and power domains. Layout must keep high-current switching paths away from the isolated interface and preserve the manufacturer's recommended creepage and clearance around the device.
推荐
Instrumentation and Data-Acquisition Systems
The ISO1452BDW can connect laboratory, process, and data-acquisition equipment requiring a fast, galvanically isolated differential communication path. Its 50-Mbps maximum rate supports high-volume command and measurement traffic, and the full-duplex architecture removes the need to share a single bus direction. The 3-channel digital isolator provides additional isolated digital connectivity, while the 5-kVrms withstand rating is valuable when instrument grounds may differ from host grounds. Engineers should verify analog and digital return paths so bus noise is not inadvertently coupled through the enclosure or shield system.
推荐
Medical and Diagnostic Equipment
The ISO1452BDW can be evaluated for medical and diagnostic equipment where a communication link must cross a patient-protection or equipment-isolation boundary. Its 5-kVrms isolation withstand rating, 1500-VPK working voltage, and full-duplex RS-422/RS-485 capability support a high-speed isolated data path. The 50-Mbps rate provides ample bandwidth for commands and diagnostic data. Actual medical suitability cannot be inferred from these communication specifications alone; the complete system must satisfy applicable safety, creepage, clearance, component-qualification, and risk-management requirements.
推荐
Isolated Building and Energy-Control Networks
The ISO1452BDW suits building-control, energy-management, and distributed equipment nodes that exchange data over isolated RS-485 or RS-422 links. Full-duplex communication can simplify protocol timing between a central controller and remote module, and the 50-Mbps maximum rate covers common control traffic with margin. The 5-kVrms isolation withstand rating helps reduce fault-current paths between differently powered subsystems. The 16-pin wide-body SOIC footprint is compatible with conventional leaded assembly, but production designs must preserve creepage, clearance, and separate ground domains around the isolation barrier.
推荐
推荐产品汇总
工程参考数据： ISO1452BDW ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ISO1452DWR | ISO1452DW | ISO1452BDWR |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 16-pin wide-body SOIC | 16-pin wide-body SOIC - same | 16-pin wide-body SOIC - same | 16-pin wide-body SOIC - same |
| Maximum Data Rate | 50 Mbps | 50 Mbps | 50 Mbps | 50 Mbps |
| Duplex Mode | Full duplex | Full duplex | Full duplex | Full duplex |
| Isolation Withstand Voltage | 5 kVrms | 5 kVrms | 5 kVrms | 5 kVrms |
| Isolation Working Voltage | 1500 VPK | 1500 VPK | 1500 VPK | 1500 VPK |
| Digital Isolation Channels | 3 channels | 3 channels | 3 channels | 3 channels |
| Interface Standards | RS-485 and RS-422, compatible with TIA/EIA-485-A | RS-485 and RS-422, compatible with TIA/EIA-485-A | RS-485 and RS-422, compatible with TIA/EIA-485-A | RS-485 and RS-422, compatible with TIA/EIA-485-A |
| EMC Protection | EMC protected | EMC protected | EMC protected | EMC protected |
关键差异点
- High-speed isolated differential communication （对比 ISO1432DWR)
- Integrated multi-channel digital isolation （对比 ISO1410DWR)
- EMC-focused interface implementation （对比 SN65HVD06D)
- Full-duplex bus operation （对比 SN75174DWR)
设计说明
Preserve the manufacturer-specified isolation boundary on all copper, solder mask, silkscreen, and assembly layers. Do not route ground or chassis connections across the barrier. Maintain the datasheet's creepage and clearance requirements and avoid placing high-voltage or high-current switching nodes near either side of the isolated interface.
Route the RS-485 or RS-422 differential pair as a tightly coupled pair with matched impedance, consistent length, and minimal stubs. Keep the bus-side traces away from digital switching edges and the isolated-side supply return. Verify propagation-delay and skew budgets at 50 Mbps and confirm that the connector, cable, termination, and transceiver can all support the intended signaling distance.
Do not treat a 50-Mbps IC data-rate rating as permission to omit termination or relax cable-length calculations. Confirm the receiver topology, fail-safe behavior, bus loading, common-mode range, supply levels, and logic thresholds in the ISO1452 datasheet. Also verify that the selected ISO1452 ordering suffix provides the required temperature grade and shipping format.
Follow the manufacturer's guidance for each isolated supply domain, including capacitor selection, placement, and return-current routing. Keep input and ground planes continuous on their respective sides of the isolation barrier. Because detailed supply-current and capacitor values were not included in the supplied data, they must be obtained from the manufacturer datasheet rather than estimated.
合规信息
The supplied verified extracts identify the ISO1452 family as compatible with TIA/EIA-485-A and describe a 5-kVrms isolated interface, but they do not explicitly state the target MPN's RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The distributor excerpt labels the temperature grade as automotive, but that statement alone was not treated as proof of AEC-Q100 qualification.
