SP485CS-L - 5Mbps RS-485/RS-422 Transceiver | MaxLinear
料号： SP485CS-L ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
SP485CS-L 概述
An RS-485/RS-422 transceiver is an interface IC that converts single-ended logic signals into differential signals for reliable, noise-tolerant transmission over longer cable runs. The differential signal helps reduce common-mode noise and improves signal integrity in industrial environments. The SP485 family is designed for half-duplex operation, meaning the same differential pair can be used for transmitting and receiving when direction control is managed by external logic.
The SP485CS-L operates from a 4.75 V to 5.25 V supply according to the verified distributor data. The SP485 family is identified as a low-power BiCMOS RS-485/RS-422 transceiver family, and the SP485 variant supports communication up to 5 Mbps. The driver/receiver architecture is suited to industrial control, data acquisition, building automation, and equipment interfaces where a robust balanced link is preferred.
The PDIP-8 package supports conventional through-hole PCB assembly and tube packaging. Because the device is half-duplex, a direction-control circuit is typically used to enable the driver or receiver. Correct termination, biasing, grounding, and cable routing are essential for dependable operation, especially at higher data rates where transmission-line effects become more significant.
Typical applications include industrial RS-485 buses, remote sensor nodes, PLC and instrumentation links, motor-control systems, and communications between distributed modules. The 5 Mbps capability is useful for relatively high-speed local links, while actual cable length and topology remain application-dependent.
Designers should verify the exact pin functions, electrical limits, and thermal performance against the manufacturer datasheet before layout. A small decoupling capacitor should be placed close to the supply pins, and the differential pair should be routed as a controlled-impedance pair when board geometry permits. The transceiver must not be replaced with a functionally similar part unless package, pinout, logic levels, drive strength, receiver thresholds, and timing have all been confirmed.
直接替换替代料： SP485CS-L ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
SP485CS
✅ 直接替换📋 参考替代料（不在目录中）
SP485EN
✅ 直接替换📋 参考替代料（不在目录中）
ST485CN
✅ 直接替换📋 参考替代料（不在目录中）
LTC485IN8#PBF
✅ 直接替换📋 参考替代料（不在目录中）
SP485CS-L 规格参数
| Product Type | Half-duplex differential transceiver |
| Supported Standards | RS-485 and RS-422 |
| Maximum Data Rate | 5000 kbps |
| 电源电压 | 4.75 V to 5.25 V |
| Supply Type | +5 V only |
| Technology | BiCMOS |
| Operation Mode | Half-duplex |
| Driver Configuration | 1/1 differential driver |
| Receiver Configuration | Differential receiver |
| Enable Function | Driver/receiver enable |
| 封装 | PDIP-8 |
| 引脚数量 | 8 pins |
| 安装类型 | Through-hole |
| 工作温度 | 0 C to 70 C |
| Packaging | Tube |
| Manufacturer | MaxLinear, Inc. |
| RoHS 状态 | unknown |
SP485CS-L pdip-8 引脚配置指南
SP485CS-L（pdip-8 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： SP485CS-L.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SP485CS-L 适用于 6 应用s: Industrial RS-485 Control Bus, Remote Sensor and Data Acquisition, PLC and Instrumentation Communication, Building Automation Networks, Motor and Power-System Monitoring, Legacy +5 V Communication Interface.
Industrial RS-485 Control Bus
The SP485CS-L is suited to an industrial control bus because it combines a half-duplex differential driver and receiver with RS-485 support and operation up to 5000 kbps. It can connect a controller to remote actuators, sensors, or I/O modules over a balanced cable. The 4.75 V to 5.25 V supply range fits conventional +5 V industrial logic, while the PDIP-8 package simplifies through-hole assembly and maintenance. Direction-control logic should ensure that only one node drives the shared bus at a time. Cable termination, common-mode behavior, grounding, and node isolation must be validated for the installation.
推荐
Remote Sensor and Data Acquisition
Use the SP485CS-L as the physical-layer interface for a remote sensor or data-acquisition node when the telemetry link must reject noise and travel through a longer cable. Its differential RS-485/RS-422 signaling helps preserve data integrity in environments containing motors, relays, and switching supplies. The verified 5 Mbps capability provides headroom for many local sensor networks, although the practical cable length decreases as the baud rate increases. The receiving logic and host UART should be configured for the transceiver’s supported signaling levels, and the bus should include only the termination and biasing required by its topology.
推荐
PLC and Instrumentation Communication
The SP485CS-L can provide a point-to-point or multidrop communication link between a PLC, test instrument, and peripheral module. Half-duplex operation makes it practical for command and response traffic where the controller selects transmit or receive direction with an enable signal. The +5 V supply range aligns with many legacy industrial control boards, while the 8-pin PDIP package is convenient for repairable through-hole designs. Before deployment, verify the instrument’s RS-485/RS-422 mode, connector pinout, cable shield policy, and ground reference. A transceiver substitution must not be made based only on the RS-485 label because logic thresholds and timing can differ.
推荐
Building Automation Networks
SP485CS-L can serve as a low-speed-to-medium-speed building automation interface for controllers, environmental sensors, and access-control modules. Differential communication is useful when cables run near lighting, relays, elevators, and other potential noise sources. The device’s half-duplex architecture supports shared-bus communication when the network manager controls bus direction. The verified operating range of 0 C to 70 C may fit indoor commercial equipment, but deployed temperature conditions must be checked against the exact qualification and system requirements. Use a defined grounding and surge-protection strategy suitable for building wiring rather than relying on the transceiver alone for transient protection.
推荐
Motor and Power-System Monitoring
The SP485CS-L can connect a monitoring controller to temperature, current, or controller nodes in a motor-control cabinet. RS-485/RS-422 differential signaling is appropriate for electrically noisy machinery environments when the cable and grounding are designed correctly. The transceiver’s 5 Mbps maximum rate is more than adequate for many supervisory status and parameter links, but the designer should choose the baud rate based on network length and error margin. Keep the bus away from motor phases and high-current switching nodes, use shielded or appropriately routed cable, and add external protection when transients or ESD exposure exceeds the supported application environment.
推荐
Legacy +5 V Communication Interface
The SP485CS-L is a practical choice when extending an older +5 V control board with a robust balanced-bus port. Its 4.75 V to 5.25 V supply range avoids requiring a higher-voltage interface rail, and the PDIP-8 format supports conventional through-hole repair and prototyping. This is especially useful for equipment that predates compact surface-mount transceivers. The host logic must control the driver enable and receiver enable appropriately, and the bus should be isolated from ground-current paths wherever practical. Confirm the original system’s termination, fail-safe, and connector pinout before replacing or paralleling interfaces.
推荐
推荐产品汇总
工程参考数据： SP485CS-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 | SP485CS | SP485EN | ST485CN | LTC485IN8#PBF |
|---|---|---|---|---|---|
| Package | PDIP-8 | PDIP-8 - same | PDIP-8 - same | PDIP-8 - same | PDIP-8 - same |
| Brand | MaxLinear | MaxLinear | MaxLinear | STMicroelectronics | Analog Devices |
| Product Type | Half-duplex differential transceiver | RS-485/RS-422 transceiver | RS-485/RS-422 transceiver candidate | RS-485 transceiver candidate | RS-485 transceiver candidate |
| Mounting Type | Through-hole | Through-hole | Through-hole candidate | Through-hole candidate | Through-hole |
| RS-485/RS-422 Support | RS-485 and RS-422 | RS-485 and RS-422 | RS-485 and RS-422 candidate | RS-485 candidate | RS-485 candidate |
关键差异点
- Verified 5 Mbps family capability （对比 SP485EN)
- Verified +5 V supply range （对比 ST485CN)
- Verified PDIP-8 commercial package （对比 LTC485IN8#PBF)
设计说明
Place the supply bypass capacitor immediately adjacent to the SP485CS-L supply pins and keep the return path short. Route the RS-485/RS-422 differential pair as a pair with consistent geometry where practical, and keep it away from switching nodes, motor phases, and high-current return paths. Because the verified data does not provide a manufacturer land pattern, use the official PDIP-8 footprint rather than estimating pad locations.
Treat the cable as a transmission line when operating at higher baud rates. Evaluate termination, biasing, cable length, node spacing, and topology together; adding termination at every node can overload the bus. The verified information confirms a 5000 kbps maximum data rate, but it does not establish a universal cable-length or termination value, so those values must come from the selected bus design and manufacturer guidance.
Do not infer that any 8-pin RS-485 IC is automatically a drop-in replacement. Verify pin names, driver and receiver enable polarity, fail-safe behavior, receiver thresholds, supply limits, timing, and package dimensions. The verified cross-reference results identify comparison candidates but do not provide complete electrical equivalence data, so production substitutions require datasheet-level review and bench validation.
合规信息
The supplied verified data does not provide definitive RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statements. The 0 C to 70 C operating range is listed for SP485CS-L.
