MAX3485CPA+ - 3.3V 10Mbps RS-485/RS-422 Transceiver | Maxim
料号： MAX3485CPA+ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.4286 | $7.43 |
| 10 | $7.4286 | $74.29 |
| 100 | $7.4286 | $742.86 |
| 500 | $7.4286 | $3,714.30 |
| 1,000 | $7.4286 | $7,428.60 |
MAX3485CPA+ 概述
An RS-485/RS-422 transceiver is a physical-layer interface IC that combines differential line-driver and differential receiver functions. RS-422 commonly supports point-to-point, one-driver topologies, while RS-485 supports longer multipoint buses and often requires biasing and termination. The MAX3485CPA+ sits in the interface-IC hierarchy between a host UART or microcontroller and a balanced data cable.
The MAX3485CPA+ operates from 3.3V and supports communication rates up to 10Mbps. Its slew-rate-limited driver is intended to limit edge speed, which can reduce radiated EMI and ringing on imperfectly terminated cables. The device is suitable for industrial-control links, building automation, instrumentation, motor-control systems, and other embedded serial networks where a low-power differential interface is required.
The 8-pin PDIP package supports through-hole PCB assembly and is distinct from the surface-mount alternatives identified in the cross-reference data. The transceiver-half architecture means the application determines whether the driver and receiver are enabled together or whether receive-only and transmit-only behavior is used through external control. Correct biasing, termination, grounding, and cable topology remain essential for reliable RS-485 operation.
For design work, preserve the pinout and package when selecting a substitute. SP3485EN-L/TR is identified as a functionally equivalent, pin-compatible cross-reference with 2kV ESD protection, but its package and exact electrical details should be checked against the target design. This page consolidates verified manufacturer and distributor information, replacement data, application guidance, and design cautions for engineers evaluating MAX3485CPA+.
直接替换替代料： MAX3485CPA+ ——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： MAX3485CPA+ （相同外形与封装尺寸） ——差异在于 Product Type, Mounting Type, Package, Data Rate, Driver Count.
快速对比工具——选择替代料号进行并排对比：
SP3485EN-L/TR
✅ 直接替换✓ 有现货
$0.2813 / 个
查看数据手册 →SP3485CN-L
✅ 直接替换✓ 有现货
$0.43 / 个
查看数据手册 →MAX3485CPA+ 规格参数
| Product Type | RS-485/RS-422 transceiver |
| 电源电压 | 3.3 V |
| 数据速率 | Up to 10 Mbps |
| Driver and Receiver Count | 1 driver and 1 receiver |
| Communication Standard | RS-485 and RS-422 |
| Driver Architecture | Slew-rate limited |
| 封装 | 8-pin PDIP |
| 安装类型 | Through hole |
| Transceiver Configuration | Half-duplex transceiver |
| Low-Power Operation | 3.3 V low-power transceiver |
| EMI and Reflection Control | Slew-rate-limited driver intended to minimize EMI and cable reflections |
MAX3485CPA+ 8-pin pdip 引脚配置指南
MAX3485CPA+（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： MAX3485CPA+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX3485CPA+ 适用于 6 应用s: Industrial RS-485 Control Networks, Building Automation and Sensor Buses, Instrumentation and Measurement Equipment, Motor-Control and Embedded Serial Links, Point-to-Point RS-422 Equipment, Embedded UART Communication Modules.
Industrial RS-485 Control Networks
The MAX3485CPA+ is suitable for industrial controller boards that need a 3.3V differential serial interface between a microcontroller or UART and an RS-485 bus. Its verified 10Mbps capability supports higher-rate links, while the slew-rate-limited driver helps control edge energy and reduce reflections. In a multidrop network, the designer must still provide correct termination and fail-safe biasing, maintain a common reference between connected nodes, and verify the cable length and topology against the manufacturer guidance.
推荐
Building Automation and Sensor Buses
The MAX3485CPA+ can connect low-power building-automation equipment, sensor nodes, and supervisory controllers over a balanced RS-485 bus. The 3.3V supply operation aligns with compact embedded systems, while one driver and one receiver support the transceiver-half architecture used in common multidrop networks. Designers should use a defined termination strategy, avoid excessive stub lengths, and account for common-mode voltage and grounding conditions; those electrical limits are not included in the supplied data and must be checked in the datasheet.
推荐
Instrumentation and Measurement Equipment
MAX3485CPA+ is appropriate for measurement instruments that need a short- or medium-distance differential link between a controller and an external sensor, analyzer, or calibration module. Its verified 10Mbps maximum data rate can help reduce command latency, while slew-rate limiting is useful when cable reflections or EMI are concerns. The application still needs a consistent ground strategy, appropriate cable termination, and verified receiver input limits; those receiver and common-mode values require the manufacturer datasheet rather than inference from the family name.
推荐
Motor-Control and Embedded Serial Links
The MAX3485CPA+ can be used in embedded motor-control equipment when a controller communicates with a remote drive or supervisory module over RS-422 or RS-485. Its one-driver/one-receiver configuration and 3.3V operation support compact systems, and the stated 10Mbps capability provides ample headroom for command traffic on appropriately designed wiring. Protection, isolation, and cable routing remain important in motor environments; use the verified electrical limits and layout guidance before placing the transceiver next to noisy power stages.
推荐
Point-to-Point RS-422 Equipment
For point-to-point RS-422 links, MAX3485CPA+ provides one differential driver and one differential receiver in a compact 8-pin PDIP package. This topology is useful when two boards or subsystems require balanced communication and the cable environment is controlled. The verified data supports operation up to 10Mbps and a slew-rate-limited driver, but the application must still confirm input thresholds, common-mode range, supply current, and recommended termination from the manufacturer documentation.
推荐
Embedded UART Communication Modules
The MAX3485CPA+ is useful in embedded UART-to-RS-485 modules where a microcontroller needs a robust differential bus interface for remote logging, configuration, or diagnostics. Its 3.3V operation can simplify integration with modern embedded logic, and the 10Mbps rating provides flexibility for short high-speed links. Firmware and hardware must still control driver and receiver states correctly, and the PCB should preserve the verified package pinout and provide any required termination or biasing components.
推荐
推荐产品汇总
工程参考数据： MAX3485CPA+ ——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 | SP3485EN-L/TR | SP3485CN-L |
|---|---|---|---|
| Brand | Maxim Integrated | MaxLinear | MaxLinear |
关键差异点
- Documented MAX3485 family 10Mbps capability （对比 SP3485EN-L/TR)
- Target package and interface identity （对比 SP3485EN-L/TR)
- Slew-rate-limited operation （对比 SP3485CN-L)
设计说明
Route the MAX3485CPA+ as a physical-layer interface close to the connector and cable entry. Keep the transceiver, connector, and protection components grouped to minimize the unshielded trace area exposed to external noise. Because the supplied data does not provide exact pin functions, confirm the manufacturer pinout before routing the 8-pin PDIP footprint and do not assign pins by analogy with another MAX348x member.
Do not treat a 10Mbps data-rate rating as a guarantee for every RS-485 cable. Signal integrity depends on cable length, topology, termination, stub lengths, grounding, baud rate, and edge rate. Use the slew-rate-limited MAX3485CPA+ only within the manufacturer application guidance and verify the receiver and driver electrical limits in the datasheet before release.
The verified product information specifically identifies slew-rate-limited drivers as a feature intended to minimize EMI and reduce reflections caused by improperly terminated cables. In implementation, still use the correct termination and biasing network for the network topology. Avoid long stubs and keep the cable return or shield reference properly connected according to the installation interface.
合规信息
The supplied verified web results do not explicitly provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations for MAX3485CPA+. Obtain current compliance documentation from the manufacturer or authorized distributor before release.