ISL8485IP - 5Mbps RS-485/RS-422 Transceiver | Renesas
MPN: ISL8485IP ✓ فعالISL8485IP نمای کلی
An RS-485/RS-422 transceiver is an interface IC that converts digital logic-level signals into differential signals for balanced wired communication and converts received differential signals back into logic levels. RS-422 supports point-to-point balanced links, while RS-485 permits multipoint buses and driver-enable control. The ISL8485IP belongs to the transceiver hierarchy within interface ICs and combines transmitter, receiver, bus-enable control, and protection functions in one package.
Key features include a 5Mbps maximum data rate, 4.5V to 5.5V supply tolerance, one-unit-load bus loading, and support for both RS-485 and RS-422 signaling. The 8-pin DIP package is suitable for conventional through-hole assembly, prototyping, repair, and industrial control equipment. Its half-duplex arrangement allows the same differential pair to transmit and receive, although external direction-control logic is normally required.
The BiCMOS architecture combines bipolar and CMOS characteristics to provide low-power operation with high data-rate capability. According to the Renesas ISL8485 family information, the ISL8485, ISL8490, and ISL8491 devices are 5V-powered single transceivers that meet RS-485 and RS-422 standards. The family supports supply voltages with 10% tolerance and presents one unit load to the RS-485 bus, helping control loading when multiple nodes share a communication line.
Typical applications include industrial factory automation, programmable-logic-controller communication, building-control networks, instrumentation links, and embedded serial-interface equipment. In these systems, the transceiver serves as the physical-layer interface between a controller UART or logic port and a balanced RS-485 or RS-422 cable. Its 5Mbps capability supports high-speed equipment links, while slew-rate-controlled variants in the broader family can be useful where lower EMI is the priority.
PCB design should preserve the differential signal path and provide controlled termination and biasing appropriate to the selected RS-485 or RS-422 topology. Keep the transceiver close to the connector, route the differential pair as a coupled pair, and place termination components where they can be configured for the intended network. The maximum 5.5V supply is especially important in industrial systems because transients and supply tolerances must remain within the device rating.
This product page combines verified distributor identification, package and interface details, family-level electrical characteristics, alternative sourcing information, and application-specific engineering guidance. It also distinguishes explicitly verified facts from parameters that require confirmation from the manufacturer datasheet before schematic release or production qualification.
جایگزین‌های drop-in برای ISL8485IP — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای ISL8485IP (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Manufacturer, Maximum Data Rate, Package, Product Type, Supply Voltage.
ISL8490IP
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ISL8491IP
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←SN75176AP
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
SP485ES-L
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
SP485CS-L
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ISL8485IP مشخصات
| Product Type | RS-485/RS-422 transceiver |
| Manufacturer | Renesas Electronics |
| Transceiver Configuration | 1 transceiver, half-duplex |
| ولتاژ تغذیه | 4.5V to 5.5V |
| Nominal Supply Voltage | 5V |
| Maximum Data Rate | 5Mbps |
| Supported Standards | RS-485 and RS-422 |
| RS-485 Bus Loading | 1 unit load |
| Logic Family | BiCMOS |
| بسته‌بندی | 8-pin DIP (8-PDIP) |
| نوع نصب | Through-hole |
راهنمای پیکربندی پین ISL8485IP 8-pin dip (8-pdip)
پیکربندی پین برای ISL8485IP (پکیج 8-pin dip (8-pdip)). شماره‌گذاری پایه‌ها، عملکردها و نمودارهای اتصال در دیتاشیت سازنده تعریف شده است. برای footprint دقیق و دستورالعمل‌های لحیم‌کاری به آن مراجعه کنید.
داده پین‌آوت تفصیلی موجود نیست برای ISL8485IP.
به دیتاشیت برای پیکربندی کامل پین‌ها.
کاربردهای معمول
ISL8485IP مناسب است برای 6 کاربردs: Industrial PLC Communication, Factory Automation Bus, Building Control Networks, Instrumentation and Data Acquisition, Embedded Equipment Interfaces, Legacy Communication Equipment.
Industrial PLC Communication
The Renesas ISL8485IP fits half-duplex RS-485 links between a PLC and remote I/O, operator panels, or motor-control equipment. Its verified 5Mbps maximum data rate supports fast communication cycles, while the 4.5V-to-5.5V supply range accommodates regulated 5V industrial rails. The device presents one unit load to the bus, which simplifies node-count planning when combined with the loading of the other installed transceivers. In a typical design, the PLC UART connects to the transceiver logic pins and an external driver-enable signal controls transmit versus receive intervals.
پیشنهادی
Factory Automation Bus
The ISL8485IP is suitable for factory automation equipment that exchanges control and diagnostic data over balanced RS-485 wiring. Its verified 5Mbps capability is valuable for short, well-controlled links carrying frequent process updates, while the half-duplex topology requires deterministic bus-direction control. The 8-pin DIP package is practical for legacy machinery and repair boards where through-hole construction is common. Designers should calculate the cable budget, termination strategy, common-mode range, and grounding arrangement before using high data rates on long factory cables.
پیشنهادی
Building Control Networks
The ISL8485IP can connect a building controller to distributed sensors, actuators, lighting modules, or access-control equipment using RS-485. Its one-unit-load bus behavior is important when several nodes share the wiring, and the 5Mbps rate provides ample physical-layer headroom for many control protocols. Because building installations vary in cable length and noise, engineers should select termination and fail-safe bias values for the actual topology and validate the transceiver against the protocol's timing requirements.
پیشنهادی
Instrumentation and Data Acquisition
The ISL8485IP is appropriate for laboratory and industrial instrumentation that must transfer commands and measurements between a controller and remote analog or digital acquisition modules. The verified 5Mbps maximum rate supports high-volume serial transfers, and the half-duplex architecture can share one balanced pair for transmit and receive operation. Its 5V supply tolerance permits use with conventional regulated laboratory rails. Designers should keep the differential route away from switching-node wiring and verify receiver thresholds, isolation requirements, and grounding when the instrument uses a separate power domain.
پیشنهادی
Embedded Equipment Interfaces
The ISL8485IP can bridge a microcontroller or processor UART to an RS-485 or RS-422 physical layer in embedded equipment. Its low-power 5V architecture is suited to established control boards, and the 8-pin DIP format allows straightforward assembly in prototypes or repair-oriented products. The transceiver handles differential signaling but not protocol framing, so the host controller must handle addresses, timing, collision avoidance, and direction control. Firmware should prevent transmit-enable overlap and provide controlled turnaround between transmission and reception.
پیشنهادی
Legacy Communication Equipment
The ISL8485IP is a practical choice for maintaining or repairing legacy 5V equipment that uses an 8-pin half-duplex RS-485/RS-422 transceiver position. Its through-hole DIP package aligns with older through-hole boards and simplifies socket-level replacement where appropriate. The 5Mbps rating covers many short industrial communication ports, while the one-unit-load specification supports shared-bus planning. Before installation, technicians should compare the original device's enable polarity, receiver fail-safe behavior, driver strength, and pin names because the verified excerpts do not provide a complete cross-manufacturer pin table.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای ISL8485IP — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | ISL8490IP | ISL8491IP | SN75176AP | SP485ES-L | SP485CS-L |
|---|---|---|---|---|---|---|
| Package | 8-pin DIP (8-PDIP) | 8-pin DIP (8-PDIP) | 8-pin DIP (8-PDIP) | 8-pin DIP (8-PDIP) | 8-pin DIP (8-PDIP) | 8-pin DIP (8-PDIP) |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Texas Instruments | Exar | Exar |
| Transceiver Configuration | 1 transceiver, half-duplex | Single half-duplex transceiver | Single half-duplex transceiver | Differential bus transceiver | RS-485/RS-422 transceiver | RS-485/RS-422 transceiver |
| Supported Standards | RS-485 and RS-422 | RS-485 and RS-422 | RS-485 and RS-422 | RS-485/RS-422 candidate | RS-485/RS-422 | RS-485/RS-422 |
تفاوت‌های کلیدی
- Verified high-speed capability (در مقابلSP485ES-L)
- Documented supply tolerance (در مقابلSN75176AP)
- One-unit-load RS-485 bus loading (در مقابلSP485CS-L)
- Same-brand family integration (در مقابلISL8490IP)
یادداشت‌های طراحی
Route the differential pair as a tightly coupled pair from the transceiver pins to the connector or isolation barrier, and minimize stub branches. Keep the transceiver close to the connector to reduce exposed trace length, while separating it from switching regulators and high-current inductors. The ISL8485IP supports data rates up to 5Mbps, but edge rates can be much faster than the data rate, so return paths and ground references must remain continuous across the board.
Do not substitute the part based only on the 8-pin DIP outline. Verify the numbered pin functions, transmit-enable polarity, receiver enable behavior, driver strength, receiver thresholds, and shutdown-control implementation. The verified excerpts establish the package and broad RS-485/RS-422 function but do not provide a full cross-manufacturer pin table. Confirm those details in each candidate's datasheet before approving a drop-in replacement.
Select termination and fail-safe biasing for the actual network topology rather than copying a universal resistor arrangement. Place termination at the physical ends of the cable, and determine whether the selected protocol or transceiver configuration includes internal fail-safe bias. Because the ISL8485 supports a 5Mbps rate, excessive edge energy can couple into adjacent cables or measurement circuits even when the average data traffic is low.
Operate the ISL8485IP only within its verified 4.5V-to-5.5V supply range. Place normal bypass capacitance close to the device supply and ground pins according to the manufacturer guidance, while keeping the connector-side surge path away from sensitive logic. Industrial systems may experience supply transients, so verify whether the selected board also requires external overvoltage, undervoltage, or surge protection rather than assuming the transceiver itself provides it.
اطلاعات انطباق
The verified excerpts do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields require confirmation from the current Renesas product documentation or manufacturer declarations.
