MAX485EPA+ - 2.5Mbps RS-485/RS-422 Transceiver | Maxim Integrated
料号： MAX485EPA+ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.5564 | $9.56 |
| 10 | $8.75 | $87.50 |
| 100 | $7.95 | $795.00 |
| 500 | $7.25 | $3,625.00 |
| 1,000 | $6.8 | $6,800.00 |
MAX485EPA+ 概述
An RS-485/RS-422 transceiver is an interface IC that converts logic-level digital signals into differential bus signals and converts received differential signals back into CMOS-compatible logic. RS-422 and RS-485 use differential signaling to improve noise immunity and allow communication across cables in electrically noisy environments. The MAX485EPA+ supports one driver and one receiver, making it suitable for point-to-point, multidrop, and half-duplex bus arrangements when the system includes the required enable control, termination, biasing, and transceiver-direction logic.
The MAX485EPA+ is specified as a low-power transceiver with driver short-circuit current limiting and protection. The verified product data states that the output slew rate is not limited and that the device can transmit up to 2.5 Mbps. This speed capability makes it useful for factory automation, industrial control, building automation, and embedded communications where the bus must carry bursts of digital data while maintaining a compact, widely available 8-pin through-hole package.
The device is suitable for RS-485 networks connected to microcontrollers, sensors, motor controllers, data converters, and remote I/O modules. The system designer must account for bus topology, cable length, termination resistors, common-mode limits, grounding, and the direction-control interface. The MAX485EPA+ does not by itself provide galvanic isolation; applications requiring isolation between high-energy bus wiring and control electronics should add suitable isolation components and protection devices.
Because the MAX485EPA+ uses a PDIP package, it is particularly useful for prototypes, serviceable equipment, and industrial products assembled through-hole rather than high-density automated surface-mount processes. The 8-pin package simplifies inspection and rework. The plus suffix identifies the leaded product ordering code shown in the verified distributor records; package, temperature, and qualification requirements should still be checked against the exact manufacturer ordering information before production release.
This page combines verified distributor listings, manufacturer-family information, pricing context, and practical interface design guidance. It is intended to help engineers identify whether the MAX485EPA+ fits an existing RS-485 or RS-422 PCB and to distinguish it from alternatives with different package, speed, supply, or protection characteristics.
直接替换替代料： MAX485EPA+ ——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： MAX485EPA+ （相同外形与封装尺寸） ——差异在于 Package, Driver Count, Product Type, Receiver Count, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
MAX485CPA+
✅ 直接替换✓ 有现货
$7.3596 / 个
查看数据手册 →MAX485EPA
✅ 直接替换📋 参考替代料（不在目录中）
MAX485ECPA+
✅ 直接替换📋 参考替代料（不在目录中）
MAX485EPA+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX485EPA 108
✅ 直接替换📋 参考替代料（不在目录中）
MAX485EPA
✅ 直接替换📋 参考替代料（不在目录中）
MAX485EPA+ 规格参数
| Product Type | RS-485/RS-422 transceiver |
| Driver Count | 1 driver |
| Receiver Count | 1 receiver |
| Communication Mode | Half-duplex |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Maximum Data Rate | 2.5 Mbps |
| Slew Rate | Not limited |
| Driver Protection | Short-circuit current limited and protected |
| 封装 | 8-pin PDIP |
| 安装类型 | Through-hole |
| Interface Standards | RS-422 and RS-485 |
| Driver Output | Differential |
| Receiver Input | Differential |
| Power Class | Low-power transceiver |
MAX485EPA+ 8-pin pdip 引脚配置指南
MAX485EPA+（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： MAX485EPA+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX485EPA+ 适用于 6 应用s: Factory Automation Bus, Building Automation Network, Instrumentation and Sensor Networks, Embedded Data Acquisition, Industrial Motor Control, Remote Environmental Monitoring.
Factory Automation Bus
The MAX485EPA+ fits half-duplex factory automation links that use one driver and one receiver to communicate between a controller and remote I/O. Its verified 4.75 V to 5.25 V supply range fits a 5 V control system, and its 2.5 Mbps capability provides margin for short, well-terminated industrial buses carrying bursts of status, command, and sensor data. The board designer must add the correct enable logic, bus termination, protection, and grounding.
推荐
Building Automation Network
The MAX485EPA+ can connect a building controller to distributed sensors, actuators, and access-control modules over an RS-485 segment. Its one-driver/one-receiver arrangement supports a compact half-duplex transceiver node, while the verified 2.5 Mbps capability is useful for burst-oriented building automation traffic. Cable length, building ground-potential differences, surge exposure, and isolation requirements should be evaluated before using the 8-pin PDIP device on long field wiring.
推荐
Instrumentation and Sensor Networks
The MAX485EPA+ is suitable for a remote instrumentation node that multiplexes measurements from sensors over a short differential bus. The verified 4.75 V to 5.25 V operating supply supports conventional 5 V logic, and the differential interface helps reject common-mode noise compared with single-ended transmission. Designers should select termination and biasing for the actual cable length and verify the receiver’s input behavior and system grounding in the exact manufacturer datasheet.
推荐
Embedded Data Acquisition
The MAX485EPA+ can provide the wired communication link between an embedded data-acquisition unit and a host computer or remote logger. Its one-driver/one-receiver structure allows half-duplex operation when the host and peripheral share a bus, and its 2.5 Mbps maximum rate can support high burst rates on appropriately terminated links. The 8-pin PDIP package is useful for prototypes and serviceable equipment, while production designs must include surge protection and validated connector grounding.
推荐
Industrial Motor Control
The MAX485EPA+ can connect a motor-control or drive-status module to a supervisory controller over an RS-485 network. Differential signaling is useful when the controller and drive electronics share a ground-referenced environment with switching noise, but the transceiver is not an isolation barrier. Use it only after checking common-mode limits, cable routing, protective earth, transient immunity, and the drive’s communication timing. A termination network and controlled enable sequence help prevent unwanted bus states.
推荐
Remote Environmental Monitoring
The MAX485EPA+ fits a remote environmental-monitoring node that sends periodic temperature, humidity, air-quality, or equipment-status data to a central station. Its 5 V supply range and 2.5 Mbps capability provide useful headroom for short cable links, while differential signaling improves robustness in electrically noisy installations. The enclosure and cabling environment must still be evaluated for moisture, surge, and ground-potential issues; the verified data does not establish a temperature rating or isolation capability.
推荐
推荐产品汇总
工程参考数据： MAX485EPA+ ——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 | MAX485CPA | MAX485EPA | MAX485ECPA+ | MAX485EPA+T | MAX485EPA 108 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP | 8-pin PDIP - exact packaging variant not specified | 8-pin PDIP - exact packaging variant not specified |
| Product Type | RS-485/RS-422 transceiver | MAX485 transceiver family | RS-485/RS-422 transceiver | MAX485 transceiver family | MAX485 transceiver family | MAX485 transceiver family |
关键差异点
- Integrated half-duplex RS-485/RS-422 interface （对比 MAX485CPA)
- Verified 2.5 Mbps transmission capability （对比 MAX485EPA)
- Driver short-circuit protection （对比 MAX485ECPA+)
- Through-hole 8-pin PDIP construction （对比 MAX485EPA+T)
设计说明
Do not treat the transceiver as a complete RS-485 protection solution. The verified data confirms a protected, short-circuit-limited driver, but the design still needs system-level decisions for cable termination, common-mode voltage, surge protection, grounding, and fail-safe biasing. Confirm the actual topology and cable length against the manufacturer’s electrical characteristics before placing production parts.
Keep the transceiver, connector, protection devices, and termination network close together. Route the differential pair as a balanced pair with continuous return reference, avoid long unprotected stubs, and keep switching or high-current paths spatially separated from the receiver input. A symmetric connection and properly placed return path reduce common-mode conversion and improve noise immunity.
The MAX485EPA+ can transmit up to 2.5 Mbps, but that rate does not guarantee reliable communication over every cable length. For high-speed links, use controlled edge rates, verified termination, appropriate fail-safe biasing, and a receiver enable strategy that prevents all drivers from driving simultaneously. Measure the completed bus with representative cable and loading conditions.
合规信息
The supplied verified results do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status for MAX485EPA+. Compliance must be confirmed from the exact manufacturer product documentation or distributor compliance record.