SP485RCP-L - 1 Mbps RS-485 Transceiver | MaxLinear
料号： SP485RCP-L ✓ 量产中SP485RCP-L 概述
An RS-485 transceiver is a physical-layer interface IC that combines a differential line driver with a differential receiver. It belongs to the hierarchy of transceiver, interface IC, communications semiconductor, and semiconductor. RS-485 signaling supports robust point-to-multipoint data links over longer cable runs than single-ended logic interfaces, while RS-422 compatibility allows the same device to participate in compatible differential receiver networks.
The SP485RCP-L provides a 1/1 driver-to-receiver configuration, allowing one transceiver to support bidirectional communication when the bus direction is controlled externally. Its 1 Mbps maximum signaling rate supports substantially faster communication than low-speed RS-485 devices. The commercial 0°C to 70°C temperature rating defines its intended operating environment, while the through-hole PDIP-8 package supports conventional PCB assembly and field-serviceable equipment.
The transceiver separates the physical-layer data path from the digital logic interface used by a host controller. Direction control must be managed so that the driver and receiver do not contend on the bus. For half-duplex networks, the system commonly uses a receiver-enable or driver-enable signal to change the operating direction around a transmission request. Proper termination and biasing remain essential for dependable behavior on multidrop buses.
Typical applications include industrial control links, instrument interfaces, point-of-sale equipment, building automation controllers, and factory data networks. The part is especially relevant when an existing board uses an 8-pin PDIP footprint and requires a direct RS-485/RS-422 interface upgrade without changing the mechanical layout. Its maximum data rate also suits moderate-speed supervisory and control channels rather than only slow telemetry links.
Designers should verify logic thresholds, driver enable polarity, receiver fail-safe behavior, isolation needs, and bus-topology requirements before releasing a replacement design. A DIP package simplifies through-hole assembly, but it is larger than surface-mount alternatives. In long cables or noisy industrial environments, add appropriate transient protection, controlled grounding, and tested termination rather than relying on the transceiver alone for surge immunity.
This page combines package, interface, temperature, and data-rate details with pin-compatible replacement guidance and practical PCB considerations. It is intended to help engineers determine whether SP485RCP-L fits an existing RS-485 design and to identify the checks required before approving a substitution.
直接替换替代料： SP485RCP-L ——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： SP485RCP-L （相同外形与封装尺寸） ——差异在于 Mounting Type, Package, Supply Voltage.
SP485RCP
✅ 直接替换📋 参考替代料（不在目录中）
MAX483ECPA+
✅ 直接替换📋 参考替代料（不在目录中）
SP485RCP-L 规格参数
| Product Type | RS-422/RS-485 transceiver |
| Transceiver Configuration | 1 driver / 1 receiver |
| Duplex Mode | Half-duplex |
| Supported Standards | RS-422 and RS-485 |
| Maximum Data Rate | 1000 kbps |
| 电源电压 | 5.25 V |
| 工作温度范围 | 0°C to 70°C |
| 封装 | 8-pin PDIP |
| 安装类型 | Through-hole |
| Driver Count | 1 |
| Receiver Count | 1 |
SP485RCP-L 8-pin pdip 引脚配置指南
SP485RCP-L（8-pin pdip 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： SP485RCP-L.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SP485RCP-L 适用于 6 应用s: Industrial Controller RS-485 Link, Building Automation Communication, Point-of-Sale Equipment, Instrumentation and Sensor Network, Factory Data Acquisition, Legacy Communication Card Upgrade.
Industrial Controller RS-485 Link
The SP485RCP-L fits an industrial controller that communicates with remote modules over a half-duplex RS-485 bus. Its one-driver, one-receiver arrangement supports bidirectional control traffic, and the 1000 kbps maximum data rate provides ample margin for supervisory commands and status updates. Install it where the 0°C to 70°C operating range covers the enclosure environment. Use external direction control, tested bus termination, and protective grounding so that software timing, reflections, and conducted noise do not undermine otherwise reliable differential signaling.
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Building Automation Communication
The SP485RCP-L is appropriate for building-automation controllers exchanging configuration, sensor, and actuator data over a wired differential bus. A 1 Mbps physical-layer ceiling supports responsive control traffic, while the 8-pin PDIP package simplifies through-hole assembly in controllers designed for serviceability. The 0°C to 70°C range suits many indoor control cabinets, but it should be checked against local ambient conditions. Verify bus topology, grounding strategy, termination locations, and protocol timing before deployment.
推荐
Point-of-Sale Equipment
SP485RCP-L can support a point-of-sale terminal or peripheral network that uses an RS-485 physical layer for configuration or command traffic. The half-duplex 1/1 topology permits controlled bidirectional exchanges, and its 1000 kbps limit provides useful headroom over typical transaction-control protocols. The PDIP-8 package is beneficial in serviceable commercial equipment assembled through holes. Keep the transceiver away from motors and switching supplies, and validate grounding and protection against the installation environment.
推荐
Instrumentation and Sensor Network
The SP485RCP-L can connect a measurement instrument or sensor controller to a remote RS-485 network when moderate update rates and robust differential signaling are required. Its 1 Mbps maximum rate permits faster sampling and configuration exchanges than slow RS-485 transceivers, while the 8-pin PDIP format is convenient for laboratory and industrial instrumentation boards. Confirm that the 0°C to 70°C specification covers the measured environment and that cable length does not reduce the usable data rate or exceed receiver common-mode limits.
推荐
Factory Data Acquisition
SP485RCP-L is suitable for factory data-acquisition equipment that collects short status messages or configuration data from distributed machines. A half-duplex RS-485 bus can connect multiple nodes when termination, biasing, and addressing are designed correctly. The transceiver's 1000 kbps capability supports fast polling, although practical throughput is constrained by protocol overhead and turnaround time. Its through-hole package supports straightforward PCB assembly, while additional surge and ESD protection should be selected for electrically noisy machinery.
推荐
Legacy Communication Card Upgrade
The SP485RCP-L is well suited to repairing or upgrading a legacy communication card that already uses an 8-pin PDIP RS-485 footprint. The same-package format can reduce mechanical redesign, while the 1 Mbps interface rating and 1/1 driver-receiver arrangement match common older bus designs. Before installation, compare the original and replacement pin descriptions, especially enable polarity and receiver enable behavior. Preserve the board's termination, fail-safe biasing, isolation boundaries, and protective components during the retrofit.
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推荐产品汇总
工程参考数据： SP485RCP-L ——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 | SP485RCP | MAX483ECPA+ |
|---|---|---|---|
| Brand | MaxLinear | MaxLinear | Analog Devices |
| Package | PDIP-8 | PDIP-8 | PDIP-8 |
| Product Type | RS-422/RS-485 transceiver | RS-422/RS-485 transceiver | RS-485 transceiver |
| Supported Standards | RS-422 and RS-485 | RS-422 and RS-485 | RS-485 |
| Mounting Type | Through-hole | Through-hole | Through-hole |
关键差异点
- Direct SP485R family continuity （对比 MAX483ECPA+)
- Through-hole package supports serviceable legacy boards （对比 MAX483ECPA+)
- Combined RS-422 and RS-485 interface （对比 MAX483ECPA+)
设计说明
Route the RS-485 differential pair as a tightly coupled pair on the PCB, keeping the ground reference nearby and avoiding stubs. Place the transceiver close to the connector so that protection components and the bus interface share a short return path. Keep switching-regulator loops, relay contacts, and high-current conductors away from the differential pair to reduce differential noise and common-mode conversion.
Do not infer pin compatibility from the PDIP outline alone. Compare the numbered driver-enable and receiver-enable functions, ground assignments, supply pins, and receiver-output logic with the manufacturer pin-description table. Direction-control polarity is a frequent replacement error, and even a correctly installed substitute can disable the bus if the host firmware expects the opposite enable level.
Use termination, biasing, and protection as one coordinated bus design. Place termination at the physical ends of the main trunk, avoid termination on every stub, and provide fail-safe bias through a suitable network where needed. For cables leaving an enclosure, add appropriately rated transient and ESD protection while maintaining impedance continuity and a low-resistance chassis-to-ground path.
Decouple the 5.25 V transceiver supply close to the device with the capacitance and ESR values specified by the manufacturer. Keep the transceiver's supply return separate from high-current return paths where practical, and route or filter noisy supply sources rather than relying on the bus receiver alone. Validate the rail during maximum driver activity to avoid unwanted resets, timing errors, or false receiver transitions.
合规信息
The SP485RCP-L ordering suffix commonly denotes a lead-free finish, but RoHS, REACH, halogen-free, conflict-minerals, and AEC-Q100 status are not explicitly established by the available manufacturer-family information. No compliance claim should be made without current manufacturer documentation.