MAX3488EESA+ - 12Mbps RS-485/422 IC | Maxim Integrated
부품 번호: MAX3488EESA+ ✓ 활성MAX3488EESA+ 개요
An RS-485/RS-422 transceiver is an interface IC that converts logic-level digital signals into balanced differential signals for reliable data transmission over wired networks. RS-485 supports multi-drop buses and common-mode noise rejection, while RS-422 provides a point-to-point differential interface with strong drive capability. The MAX3488EESA+ supports both standards and functions as a half-duplex interface with one driver and one receiver, allowing a system to transmit and receive data over a shared pair of conductors.
The device operates from a 3.3V supply and provides ±15kV ESD protection on its bus-facing pins. Its slew-rate-limited driver reduces high-frequency harmonics, electromagnetic interference, and cable reflections caused by poor impedance matching. The manufacturer describes the MAX3488 family as low-power, 3.3V transceivers intended to minimize electromagnetic emissions and enable error-free communication at data rates up to 250kbps when conservative slew-rate-limited operation is used. Faster operation up to 12Mbps is available for appropriately terminated point-to-point links.
The MAX3488EESA+ uses a differential driver and differential receiver architecture to reject common-mode voltage present on industrial wiring. Its driver produces complementary differential outputs, while the receiver responds to the voltage difference between the bus pair. This architecture supports robust links between a controller, sensor, converter, or data-acquisition module and a remote system. Because the interface is half duplex, software or hardware flow control is needed when the same pair carries both transmit and receive signals.
Typical uses include industrial sensor networks, motor-control equipment, PLC peripheral interfaces, factory data buses, instrumentation, building automation, and remote-control links. The 8-pin SOIC package simplifies assembly for conventional PCB designs and supports automated production. The low 3.3V operating voltage also allows direct interfacing with 3.3V microcontrollers, DSPs, and programmable logic when their I/O levels are compatible with the transceiver thresholds.
Designers should verify the exact driver, receiver, ground, and supply connections in the pin-description table before routing the PCB. Place the transceiver close to the cable connector, provide a solid ground reference, use proper differential pair routing, and install the protection network recommended by the manufacturer. Cabling, topology, termination, and grounding can be more important than nominal logic speed in determining field reliability.
This product resource summarizes the MAX3488EESA+ electrical identity, package, application fit, and compatible interface options. It also highlights practical bus-layout and ESD-protection considerations that help engineers compare the device against other 3.3V RS-485/422 transceivers before committing to a PCB footprint.
드롭인 대체품: MAX3488EESA+ — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MAX3488EESA+ (동일 폼 팩터 및 풋프린트) — 차이점: Mounting Type, Package, Driver Count, Receiver Count, Signal Type.
MAX3485EESA+T
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX3486EESA+
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MAX3488ECSA+T
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX3488ECPA+
✅ 드롭인가격 문의
데이터시트 보기 →SN65HVD78DR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX3488EESA+ 사양
| Product Type | RS-485/RS-422 transceiver |
| 공급 전압 | 3.3 V |
| Maximum Data Rate | 12 Mbps |
| ESD Protection | ±15 kV |
| Driver Count | 1 |
| Receiver Count | 1 |
| Signal Type | True differential RS-485/RS-422 |
| Driver Slew Rate | Slew-rate limited |
| Communication Mode | Half duplex |
| 패키지 | 8-pin NSOIC |
| 실장 유형 | Surface mount |
MAX3488EESA+ 8-pin nsoic 핀 구성 가이드
MAX3488EESA+(8-pin nsoic 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: MAX3488EESA+.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
MAX3488EESA+ 적합 용도: 6 애플리케이션s: Industrial Sensor Networks, PLC and Controller Peripherals, Factory Data Acquisition, Building Automation, Instrumentation and Test Equipment, Motor and Power-Control Communications.
Industrial Sensor Networks
The MAX3488EESA+ fits industrial sensor networks that distribute measurements over a 3.3V RS-485 bus. Its differential driver and receiver improve common-mode rejection, while the 12Mbps maximum rate supports short, high-speed links and the manufacturer’s 250kbps guidance supports longer, slew-rate-limited networks. The ±15kV ESD protection is useful where sensors connect to field-wired equipment. Designers should apply bias resistors at a defined bus location, terminate only the two physical endpoints, and use a continuous ground reference to prevent the receiver from interpreting common-mode voltage as data.
추천
PLC and Controller Peripherals
The MAX3488EESA+ provides a compact differential link between a 3.3V controller and a remote PLC peripheral, motor controller, or data-acquisition module. Its one-driver, one-receiver configuration is suitable for half-duplex command and response traffic when the system controls bus direction in software. The 8-pin SOIC package supports conventional surface-mount assembly, while the slew-limited output reduces fast-edge EMI. Ensure the host controller uses compatible logic thresholds and that the transceiver’s enable polarity matches the intended power-on state to prevent unwanted bus activation.
추천
Factory Data Acquisition
The MAX3488EESA+ is appropriate for factory data-acquisition equipment collecting measurements from multiple remote modules over a wired differential bus. Its 3.3V operation aligns with modern embedded processors, and the 12Mbps capability allows short links to operate rapidly without changing the interface device. The MAX3488E family’s slew-rate-limited driver helps reduce radiated emissions and reflections on imperfectly terminated cables. For dependable operation, maintain a common ground reference, route the differential pair as a controlled impedance pair, and separate switching-regulator and motor-current paths from the communication area.
추천
Building Automation
The MAX3488EESA+ can connect building controllers, room modules, dampers, and occupancy sensors using a 3.3V RS-485/RS-422 differential interface. Its low-voltage supply simplifies integration with controller logic, while the 250kbps conservative operating recommendation of the MAX3488 family aligns with many building-automation networks. The ±15kV ESD protection adds useful resilience at exposed equipment boundaries. Keep cable routing away from mains wiring, observe the recommended network topology, and use the transceiver ground as a controlled reference rather than relying only on the cable shield.
추천
Instrumentation and Test Equipment
The MAX3488EESA+ supports compact instrumentation that must exchange measurement and control data with a remote host. Differential signaling improves immunity to ground offsets and common-mode noise encountered near power-conversion or switching circuits. The 3.3V supply supports low-power logic integration, and the 8-pin SOIC package makes the interface easy to place near a rear-panel connector. For laboratory or field use, protect the connector with an appropriately rated network and keep the cable interface away from precision analog ground currents to avoid introducing measurement errors.
추천
Motor and Power-Control Communications
The MAX3488EESA+ can carry command, status, and diagnostic data between a controller and a motor-control or power-conversion module. Differential reception is valuable in systems where high currents cause ground-potential differences between equipment cabinets. The interface’s 12Mbps maximum rate accommodates short control links, while slew-rate-limited operation reduces EMI around power stages. Keep the transceiver and its protection network near the cable entry, use a defined logic ground at the interface, and avoid routing the bus alongside motor phase and high-current switching nodes.
추천
추천 제품 요약
엔지니어링 참조 데이터: MAX3488EESA+ — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MAX3485EESA+T | MAX3486EESA+ | MAX3488ECSA+T | MAX3488ECPA+ | SN65HVD78DR |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Texas Instruments |
| Package | 8-pin NSOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Driver and Receiver Count | 1 driver, 1 receiver | 1 driver, 1 receiver | 1 driver, 1 receiver | 1 driver, 1 receiver | 1 driver, 1 receiver | Full-duplex transceiver |
| Interface Standard | RS-485/RS-422 | RS-485/RS-422 | RS-485/RS-422 | RS-485/RS-422 | RS-485/RS-422 | RS-485 |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount |
주요 차별점
- Higher documented maximum data rate than the 250kbps-class alternative (vs SN65HVD78DR)
- Half-duplex bus architecture with one driver and one receiver (vs SN65HVD78DR)
- Slew-rate-limited driver reduces fast-edge EMI and reflections (vs MAX3486EESA+)
- Documented high-level bus ESD protection (vs MAX3485EESA+T)
설계 노트
Place the MAX3488EESA+ close to the external connector and route the two bus conductors as a tightly coupled differential pair. Keep the bus pair away from switching nodes, relay contacts, and high-current motor paths. Maintain a continuous ground reference between connected equipment, and use the manufacturer’s recommended protection network at exposed connectors. For RS-485 multidrop networks, terminate only the two physical ends and install fail-safe biasing at one controlled location.
Do not interpret the 12Mbps headline rate as a guarantee for every cable length or topology. The MAX3488 family documentation identifies conservative slew-rate-limited operation up to 250kbps as suitable for error-free transmission in challenging applications. Long cables, incorrect termination, unequal impedance, and poor grounding can cause reflections even when the logic waveform itself is compliant. Validate the selected baud rate across the complete cable, connector, grounding, and interference environment.
Operate the transceiver from a stable 3.3V rail and place its local supply decoupling close to the package pins. Keep the transceiver’s return current close to the signal traces so switching noise does not share a noisy path with the receiver reference. Verify enable states during reset and power-up so the driver does not unintentionally dominate the bus. If multiple devices connect to one bus, use deterministic driver-enable control and ensure only one transmitter drives the pair at a time.
The slew-rate-limited driver is valuable for controlling high-frequency harmonics and radiated emissions, but it also reduces usable edge bandwidth. Select baud rates, cable length, and termination as a complete system rather than maximizing the nominal data rate. Preserve the symmetric bus geometry, avoid stubs, and use a proper connector shield termination strategy. If radiated-emission testing fails, first inspect cable routing, common-mode paths, connector return currents, and switching-node separation before changing the transceiver.
규정 준수 정보
The MAX3488EESA+ is an industrial or commercial interface IC rather than an automotive-qualified device. Compliance fields remain unknown until confirmed by the manufacturer’s current product declaration or material declaration.
