ISO1432BDWR - 12Mbps Isolated RS-485 Transceiver | TI
MPN： ISO1432BDWR ✓ 啟用中ISO1432BDWR 概覽
An isolated RS-485/RS-422 transceiver is an interface IC that combines differential line-driver and receiver functions with a galvanic isolation barrier. The ISO1432 belongs to the broader hierarchy of interface ICs, serial transceivers, communication ICs, and semiconductors. Its full-duplex architecture supports simultaneous transmission and reception through separate driver and receiver pairs, which is useful for point-to-point links, industrial automation systems, and other noise-prone industrial environments.
The principal features of the ISO1432 include a 12-Mbps data rate, 5-kVrms isolation, full-duplex operation, and EMC protection. The 12-Mbps capability provides sufficient bandwidth for factory automation, industrial data links, and peripheral interfaces while preserving the noise immunity associated with differential signaling. Its 5-kVrms isolation rating helps separate equipment domains that may experience substantial voltage differences or ground transients.
The device supports both RS-485 and RS-422 applications in the same transceiver architecture. These standards use balanced differential signaling to reduce susceptibility to externally coupled noise, while the integrated isolation barrier adds another layer of protection. The ISO1432 is positioned for harsh industrial environments where bus pins may encounter electrostatic-discharge and electrical-fast-transient events, reducing the need for additional external protection in appropriately designed systems.
Typical uses include industrial automation controllers, factory-floor communication links, grid infrastructure equipment, isolated data-acquisition systems, and point-to-point communications between equipment cabinets. Its full-duplex configuration can simplify bidirectional communication architectures because transmit and receive paths operate independently rather than sharing a single half-duplex bus direction control.
The principal design consideration is the isolation and protection network around the bus interface. Follow the manufacturer datasheet for the exact external network, bypass-capacitor, termination, and bus-protection recommendations. Confirm that the system ground arrangement, cable length, baud rate, grounding method, and environmental ESD/EFT requirements are compatible with the ISO1432 operating limits before releasing the PCB design.
This page combines the manufacturer’s key device characteristics, same-footprint alternatives, comparison parameters, and practical interface-design guidance. It emphasizes the ISO1432’s role as a 12-Mbps, full-duplex, 5-kVrms-isolated transceiver and helps engineers distinguish it from lower-speed, half-duplex, or differently isolated interface devices before making a board-level selection.
直接替換替代品，適用於 ISO1432BDWR — 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： ISO1432BDWR （相同外形與佔位） — 差異在於 Package, EMC Protection, Operating Temperature Range, RoHS Status, Isolation Voltage.
ISO1432DWR
✅ 直接替換✓ 有庫存
$4.9219 / 單位
查看資料表 →ISO1432DW
✅ 直接替換聯絡詢價
查看資料表 →ISO1430BDWR
✅ 直接替換✓ 有庫存
$4.5938 / 單位
查看資料表 →ISO1412BDWR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ISO1410BDWR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ISO1432BDWR 規格
| 資料速率 | 12 Mbps |
| Isolation Voltage | 5 kVrms |
| 工作溫度範圍 | -40 °C to +125 °C |
| 封裝 | 16-pin SOIC (DW) |
| 腳位數 | 16 pins |
| Interface Standards | TIA/EIA RS-485 and RS-422 |
| Duplex Mode | Full duplex |
| EMC Protection | EMC protected |
| Transceiver Configuration | 1 transceiver with 2 differential driver/receiver pairs |
| 安裝類型 | Surface mount |
| Moisture Sensitivity Level | MSL 2, 260 °C for 1 year |
| RoHS 狀態 | Compliant |
| Lead-Free Status | Pbfree code |
ISO1432BDWR 16-pin soic (dw) 腳位配置指南
ISO1432BDWR（16-pin soic (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： ISO1432BDWR.
請參閱 資料表 以查看完整腳位配置。
典型應用
ISO1432BDWR 適用於 6 應用s: Industrial Automation Data Links, Point-to-Point Bidirectional Communication, Isolated Data Acquisition, Grid Infrastructure Communication, Peripheral and Equipment Interfaces, Noise-Prone Industrial Control.
Industrial Automation Data Links
The ISO1432BDWR fits industrial automation links that need a 12-Mbps, full-duplex differential interface across equipment with different ground potentials. Its 5-kVrms isolation barrier helps prevent ground-related currents from entering the controller, while the full-duplex architecture permits simultaneous command transmission and status reception. The EMC-protected bus pins are particularly useful in factory environments containing motors, relays, and long cables. Place the device between the controller UART or SPI-compatible interface and the field bus, and validate the complete network for baud rate, cable length, grounding, and surge exposure.
推薦
Point-to-Point Bidirectional Communication
The ISO1432BDWR supports point-to-point links where both endpoints must transmit and receive concurrently. Its 12-Mbps rate provides ample throughput for industrial controllers, service equipment, and remote I/O, while separate driver and receiver pairs avoid half-duplex direction-control timing. The 5-kVrms isolation rating is useful when two connected systems use different reference grounds or when the cable crosses an equipment boundary. Verify logic levels, bus termination, fail-safe behavior, and the isolation-side supply requirements in the manufacturer datasheet before finalizing the interface.
推薦
Isolated Data Acquisition
The ISO1432BDWR is appropriate for data-acquisition equipment that must communicate reliably with remote sensors or instrument racks. A 12-Mbps differential link can carry measurement commands and return data, while the 5-kVrms barrier improves operator and equipment safety in high-potential installations. Full-duplex operation simplifies simultaneous acquisition and control traffic. The system still requires careful attention to isolation-side power, input and output bypassing, cable routing, and common-mode limits. Use the manufacturer application guidance to determine whether the bus-side network needs additional surge or ESD protection for the installation environment.
推薦
Grid Infrastructure Communication
The ISO1432BDWR can support communication modules in grid infrastructure equipment where long field connections and differing ground potentials are common. Its 12-Mbps rate accommodates local supervisory traffic, and the 5-kVrms isolation provides a defined separation between the communication electronics and external equipment. EMC-protected bus circuitry improves suitability for electrically noisy installations, although successful deployment also depends on cable shielding, surge coordination, and chassis grounding. Confirm the transceiver’s operating limits and isolation requirements against the exact grid-system safety architecture before using the part in a safety-critical installation.
推薦
Peripheral and Equipment Interfaces
The ISO1432BDWR provides a practical isolated interface between a host controller and remote RS-485 or RS-422 equipment. At 12 Mbps, it supports high-rate configuration transfers, diagnostics, and real-time status exchange, while the full-duplex configuration reduces turnaround delays compared with a shared half-duplex bus. Its isolation rating helps decouple the host from ground shifts and transients at the peripheral end. Confirm that the peripheral uses compatible differential signaling, that both logic-side supplies meet their required operating conditions, and that the connector and cable protection strategy suit the target environment.
推薦
Noise-Prone Industrial Control
The ISO1432BDWR is suited to control links near motors, contactors, switching supplies, and long cables because differential signaling limits susceptibility to externally coupled noise. The integrated EMC protection and 5-kVrms isolation add protection beyond the basic differential receiver, while the 12-Mbps capability preserves short-frame and real-time command throughput. To obtain the intended immunity, implement the manufacturer’s recommended bus network and grounding arrangement rather than treating isolation as a substitute for shielded cabling. Validate the completed assembly for ESD, electrical fast transient, radiated-noise, and temperature requirements.
推薦
推薦產品摘要
工程參考資料，適用於 ISO1432BDWR — 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 | ISO1432DWR | ISO1432DW | ISO1430BDWR | ISO1412BDWR | ISO1410BDWR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 16-pin SOIC (DW) | 16-pin SOIC (DW) | 16-pin SOIC (DW) | 16-pin SOIC (DW) | 16-pin SOIC (DW) | 16-pin SOIC (DW) |
| Maximum Data Rate | 12 Mbps | 12 Mbps | 12 Mbps | 12 Mbps | 12 Mbps | 10 Mbps |
| Isolation Voltage | 5 kVrms | 5 kVrms | 5 kVrms | 5 kVrms | 5 kVrms | 5 kVrms |
| Supported Interfaces | RS-485 and RS-422 | RS-485 and RS-422 | RS-485 and RS-422 | RS-485 | RS-485 and RS-422 | RS-485 and RS-422 |
| Special Feature | EMC protection with isolated full-duplex operation | Same family and headline ratings | Same family and headline ratings | Different ISO14xx family member | Different ISO14xx family member | Lower maximum data rate |
主要差異化特點
- Full-duplex isolated communication (對比ISO1412BDWR)
- Higher maximum signaling rate (對比ISO1410BDWR)
- Closest same-family ordering option (對比ISO1432DWR)
- EMC-focused industrial interface (對比ISO1430BDWR)
設計說明
Follow the Texas Instruments ISO1432 datasheet layout exactly for the isolation barrier, input and output bypass capacitors, and bus-side return paths. Keep the isolation-region copper and component placement consistent with the manufacturer’s creepage and clearance guidance. Do not route fast bus traces beneath the isolation barrier, and maintain the specified spacing between logic-side and bus-side copper. This prevents coupling across the 5-kVrms barrier and helps preserve the intended isolation performance.
Do not assume that an RS-485 transceiver can be substituted solely because its package has 16 pins. Before fitting ISO1432DWR, ISO1432DW, ISO1430BDWR, ISO1412BDWR, or ISO1410BDWR, compare every terminal name and function, driver and receiver enable logic, isolation-side supply requirements, fail-safe behavior, and bus-receiver thresholds. The ISO1432BDWR is full duplex, while related family members may use different bus architectures. A PCB that is mechanically compatible can still be functionally incompatible.
For industrial EMC performance, implement the manufacturer’s recommended transceiver network rather than adding arbitrary capacitance directly across the differential bus. A proper network can control common-mode behavior and preserve the receiver’s differential performance. Use controlled-return or shield bonding at the connector according to the installation’s grounding plan, and keep the cable interface away from switching nodes. Validate the finished equipment against the ESD, electrical-fast-transient, and radiated-immunity levels required by the target installation.
Design separate, well-decoupled supplies for the logic side and bus side of the isolation barrier. Place the required local bypass capacitors at their associated device pins and verify startup, supply sequencing, and shutdown behavior across the complete operating temperature range. Do not infer the permissible supply range or isolation-lifetime derating from nominal values; use the electrical-characteristic and isolation sections of the manufacturer datasheet before releasing power-rail specifications.
合規資訊
The product information identifies RoHS-compliant and Pbfree status. REACH, halogen-free, and conflict-minerals status are not confirmed by the manufacturer material retrieved for this part.