SP490EEP-L - 10Mbps Full-Duplex RS-485/422 | MaxLinear
料号： SP490EEP-L ✓ 量产中SP490EEP-L 概述
直接替换替代料： SP490EEP-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： SP490EEP-L （相同外形与封装尺寸） ——差异在于 Common-Mode Range, Maximum Data Rate, Mounting Type, Package, Product Type.
SP490EEP
✅ 直接替换📋 参考替代料（不在目录中）
SP490EN-L
✅ 直接替换联系询价
查看数据手册 →LTC490
✅ 直接替换📋 参考替代料（不在目录中）
SP490EEP-L 规格参数
| Product Type | Full-duplex differential line transceiver |
| Interface Standards | RS-485 and RS-422 |
| Transceiver Count | 1 transmitter and 1 receiver |
| Duplex Mode | Full duplex |
| Maximum Data Rate | 10 Mbps |
| Receiver Input Sensitivity | ±200 mV |
| Common-Mode Range | Wide common-mode range; numerical limits not provided |
| Technology | Low-power BiCMOS |
| Power Consumption | Low power; numerical value not provided |
| 封装 | 8-pin plastic DIP |
| 安装类型 | Through-hole |
| Driver Enable | No separate tri-state driver enable in SP490E configuration |
| Receiver Enable | No separate tri-state receiver enable in SP490E configuration |
| Bus Nodes | Up to 32 nodes |
SP490EEP-L 8-pin plastic dip 引脚配置指南
SP490EEP-L（8-pin plastic dip 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： SP490EEP-L.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SP490EEP-L 适用于 6 应用s: Full-Duplex Industrial RS-485 Links, RS-422 Data Acquisition Equipment, Instrumentation and Test Systems, Building and Facility Control Networks, Embedded Serial Communication, Legacy Equipment Retrofit and Repair.
Full-Duplex Industrial RS-485 Links
The SP490EEP-L fits industrial point-to-point links that need simultaneous transmission and reception because it combines one differential driver and one receiver in an 8-PDIP package. Its 10 Mbps capability provides ample margin for supervisory commands, status data, and remote sensor updates over short industrial cables. The wider common-mode receiver range is useful in cabinets where the two communication conductors may not share exactly the same ground potential. Unlike a half-duplex transceiver arrangement, this device provides dedicated differential paths for both directions. The principal design checks are termination, common-mode grounding, cable length, and protection against industrial surge events; no SP491E-style tri-state enable lines are provided in the SP490E configuration.
推荐
RS-422 Data Acquisition Equipment
The SP490EEP-L is suitable for RS-422 data-acquisition links where one controller communicates with a remote measurement or control module. The SP490E family's 10 Mbps maximum data rate supports high-speed command and return-data paths, while the ±200 mV receiver sensitivity supports detection of the differential signal used by balanced cabling. Using the 8-PDIP package also simplifies manual assembly, prototype rework, and replacement in older test systems. For reliable operation, the designer should preserve the differential trace or cable geometry, provide the receiver with an appropriate reference, and verify the exact SP490EEP-L pinout against the manufacturer datasheet before laying out the board.
推荐
Instrumentation and Test Systems
The SP490EEP-L can bridge laboratory or field instrumentation through a full-duplex differential bus, combining a 10 Mbps interface rate with a through-hole package that is easy to prototype and service. Its receiver sensitivity of ±200 mV is useful when the communication link operates close to the signal-amplitude limits of RS-422 and RS-485. The device is particularly suitable for legacy instrument-control architectures where full duplex simplifies command and response traffic. The board still needs correct signal grounding, cable termination, and surge protection appropriate to the installation environment. Engineers should confirm supply voltage, temperature range, and complete pin assignments from the official MaxLinear datasheet because those details were not present in the supplied excerpts.
推荐
Building and Facility Control Networks
The SP490EEP-L is applicable to full-duplex building-control links carrying commands, sensor values, and diagnostic information between controllers and field modules. The 10 Mbps capability offers substantial bandwidth relative to typical control traffic, and the wide common-mode range can assist operation where ground-potential differences exist between distributed equipment. The 8-PDIP format is practical for equipment designed for through-hole assembly and field replacement. A robust design should add suitable transient protection, maintain recommended bus geometry, and account for cable ground offsets and surges at long cable runs. Because the SP490E lacks the SP491E's explicit tri-state enable inputs, system power-up behavior must be evaluated to prevent unwanted bus activity.
推荐
Embedded Serial Communication
The SP490EEP-L can provide the physical-layer endpoint for an embedded controller that needs a dedicated differential receive and transmit path rather than a shared half-duplex bus. Its 10 Mbps capability supports protocols and firmware that exchange data continuously, while the through-hole package remains convenient for prototype controllers and serviceable industrial electronics. Pair the transceiver with a microcontroller UART and verify signal levels, grounding, and timing at the selected line rate. The SP490E configuration has no separate driver or receiver tri-state enable, so firmware and external circuitry must ensure that the transmitter is inactive when it would otherwise conflict with another bus driver.
推荐
Legacy Equipment Retrofit and Repair
The SP490EEP-L is a practical fit for repairing or extending legacy equipment that uses an 8-pin through-hole differential transceiver and requires an RS-485 or RS-422 physical layer. The package supports conventional through-hole assembly and component-level replacement, while the 10 Mbps capability covers many existing communications architectures. Engineers should compare the legacy part's pin map, supply voltage, receiver thresholds, and enable connections with the SP490E/SP491E datasheet before fitting it to an existing PCB. If the original circuit relies on tri-state control or protected low-voltage operation, a functional-looking substitute may still require a small board revision. This makes schematic verification more important than the package outline alone.
推荐
推荐产品汇总
工程参考数据： SP490EEP-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 | SP490EEP | SP490E | LTC490 |
|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear | MaxLinear | Analog Devices |
| Package | 8-PDIP | 8-PDIP | 8-PDIP | 8-PDIP |
关键差异点
- Verified 10 Mbps differential operation （对比 LTC490)
- Full-duplex integration in an 8-PDIP package （对比 SP490E)
- RS-485 and RS-422 coverage in one interface IC （对比 SP490EEP)
设计说明
Confirm the complete pin table and package drawing in the official MaxLinear SP490E/SP491E datasheet before routing the PCB. The retrieved data identifies the SP490EEP-L as an 8-PDIP but does not expose the numbered signal assignments. Keep the differential driver and receiver paths as matched, short, and geometrically similar as practical, and route them away from switching nodes and unrelated high-current paths.
Do not treat a matching 8-pin outline as proof that an alternative is interchangeable. The SP490E lacks the SP491E's explicit tri-state enable inputs, while the SP490EEP cross-reference material identifies compatibility with LTC490. Verify enable behavior, supply voltage, receiver thresholds, driver output state, and pin mapping for the exact ordering code. This check is especially important when replacing a populated board rather than creating a new design.
The receiver sensitivity is ±200 mV, so common-mode voltage and conducted noise can directly affect data integrity. Use a balanced cable or controlled differential trace, maintain the appropriate reference connection, and keep external switching regulators and relays away from the communication pair. Add protection selectively because excessive capacitance or incorrect clamping can degrade the usable 10 Mbps performance.
Use a locally decoupled supply at the device and verify the exact operating and absolute-maximum voltage limits from the manufacturer datasheet before design release. The supplied source excerpts identify the SP490E as low-power BiCMOS but do not provide a numerical supply voltage, quiescent current, or current-limit threshold. Consequently, power-tree sizing and capacitor selection must use the complete datasheet values rather than assumptions.
合规信息
The supplied search results did not provide verified compliance statements for RoHS, REACH, AEC-Q100, lead-free status, halogen-free status, or conflict-minerals reporting.
