MAX3485EPA+ - 3.3V 10Mbps RS-485/RS-422 Transceiver
MPN: MAX3485EPA+ ✓ Hoạt độngMAX3485EPA+ Tóm tắt
An RS-485/RS-422 transceiver is an interface IC that converts logic-level digital signals into balanced differential bus signals and receives differential bus signals back into logic-level outputs. RS-422 commonly supports point-to-point or one-driver topologies, while RS-485 supports multipoint buses and commonly uses termination and biasing. The MAX3485EPA+ combines one transmitter and one receiver in one package, making it suitable for half-duplex communication links, industrial transceivers, and systems that need a compact dual-ended interface.
Key verified features include operation from 3V to 3.6V, a transmission data rate up to 10Mbps, slew-rate limiting for controlled signal propagation, short-circuit current limiting, and thermal shutdown protection that places the driver output into a high-impedance state. The receiver includes a fail-safe feature for improved behavior in bus idle or fault conditions. These functions help designers protect the communication path when the remote bus is shorted or when power dissipation becomes excessive.
The MAX3485 family is positioned between general-purpose digital I/O and full physical-layer network controllers. Compared with an RS-232 transceiver, it uses differential signaling and is better suited to longer, noise-resistant industrial links. Compared with a multi-channel transceiver, the MAX3485EPA+ provides a simpler one-driver, one-receiver implementation in an 8-pin PDIP package. Its through-hole package also makes it convenient for prototypes, repair assemblies, and systems where a surface-mount footprint is not required.
Typical applications include RS-485 industrial sensor links, factory automation equipment, building-control interfaces, data-acquisition systems, instrumentation, and embedded communications modules. In an RS-485 bus, the MAX3485EPA+ can be paired with a microcontroller UART, protection components, termination resistors, and bias resistors. In RS-422 applications, it can support differential point-to-point links with suitable wiring and termination.
Designers should verify the PCB footprint, supply decoupling, bus termination, common-mode limits, grounding, and protection requirements before production use. The verified data does not provide every electrical limit, package dimension, temperature grade, compliance declaration, or full pin-level application detail, so those parameters should be confirmed in the manufacturer datasheet. This page combines verified product information, cross-reference results, application guidance, and drop-in alternatives.
Bộ thay thế dễ dàng lắp đặt cho MAX3485EPA+ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX3485EPA+ (cùng hình factor và footprint) — khác nhau ở Mounting Type, Product Type, Package, Data Rate, Low-Power Operation.
SP3485EN-L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SP3485EP-L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX3485EPA
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX3485CPA+
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX3485ESA/GG8
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX3485EPA+ Thông số kỹ thuật
| Product Type | RS-485/RS-422 interface transceiver |
| Supply Voltage Range | 3 V to 3.6 V |
| Transmission Data Rate | Up to 10 Mbps |
| Driver Count | 1 |
| Receiver Count | 1 |
| Supported Standards | RS-422 and RS-485 |
| Driver Protection | Short-circuit current limiting and thermal shutdown |
| Driver Output State During Thermal Shutdown | High impedance |
| Driver Slew Control | Slew-rate limited |
| Receiver Fail-Safe Feature | Yes |
| Hộp | 8-pin PDIP |
| Kiểu lắp đặt | Through-hole |
| Operating Voltage | 3.3 V nominal |
Hướng dẫn cấu hình chân MAX3485EPA+ 8-pin pdip
Cấu hình chân cho MAX3485EPA+ (8-pin pdip gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho MAX3485EPA+.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MAX3485EPA+ phù hợp cho 7 Áp dụngs: Industrial RS-485 Sensor Networks, Factory Automation Communication Links, Building Control and HVAC Equipment, Data-Acquisition and Instrumentation Systems, Embedded UART-to-RS-485 Conversion, RS-422 Point-to-Point Communication, Test and Measurement Communication.
Industrial RS-485 Sensor Networks
The MAX3485EPA+ fits industrial sensor networks that use a 3.3V controller and differential RS-485 communication. Its one-driver, one-receiver arrangement can connect a microcontroller UART or measurement controller to remote sensors, while the verified up-to-10Mbps capability supports faster local bus traffic. Slew-rate limiting helps control edge transitions, and short-circuit current limiting plus thermal shutdown improve robustness when a bus fault occurs. The 8-pin PDIP package is practical for industrial controller boards, prototypes, and repair assemblies.
Được đề xuất
Factory Automation Communication Links
The MAX3485EPA+ is suitable for factory automation links where a controller must communicate with remote actuators, drives, or equipment over a differential bus. Operation from 3V to 3.6V supports 3.3V embedded systems, while the single-driver, single-receiver structure simplifies half-duplex point-to-point and multidrop RS-485 designs. The verified slew-rate-limited output and fault protection are useful in electrically noisy environments, although cable routing, grounding, termination, and surge protection remain system-level requirements.
Được đề xuất
Building Control and HVAC Equipment
The MAX3485EPA+ can be used in building-control equipment that links a low-voltage controller to HVAC units, sensors, dampers, or gateways. The differential RS-485/RS-422 interface is appropriate for wiring that may run between equipment panels, while the 3.3V supply range aligns with embedded controllers. The device’s verified fail-safe receiver feature helps define idle-bus behavior, and the 8-pin PDIP format supports serviceable industrial boards. External protection may be required when field wiring leaves the enclosure.
Được đề xuất
Data-Acquisition and Instrumentation Systems
The MAX3485EPA+ is useful for data-acquisition equipment that transfers measurements between a local controller and remote instrumentation. Its verified 10Mbps maximum transmission rate supports high-speed communication over suitable cable lengths and topologies, while differential signaling helps reject common-mode noise. The one-driver, one-receiver format can support RS-422 point-to-point links or RS-485 multidrop buses. Designers should select termination and biasing values based on the bus topology and validate noise performance in the final enclosure.
Được đề xuất
Embedded UART-to-RS-485 Conversion
The MAX3485EPA+ provides the physical-layer bridge between a 3.3V UART and an RS-485 bus. A microcontroller can control driver enable or receive logic around the transceiver to implement half-duplex communication. The MAX3485EPA+ supplies one driver and one receiver, making the interface suitable for compact embedded gateways, fieldbus adapters, and service equipment. Its 8-pin PDIP package simplifies through-hole prototyping, while the verified fault protections help manage bus shorts and excessive driver dissipation.
Được đề xuất
RS-422 Point-to-Point Communication
The MAX3485EPA+ can be used for RS-422 point-to-point links when differential signaling and controlled edge rates are important. Its verified one-driver, one-receiver configuration maps naturally to a full-duplex or paired communication arrangement, while the up-to-10Mbps capability supports higher-speed equipment links. The 3V to 3.6V operating range fits 3.3V logic. Cable length, impedance, termination, grounding, and common-mode requirements must be evaluated for the specific RS-422 application.
Được đề xuất
Test and Measurement Communication
The MAX3485EPA+ can connect test and measurement instruments to a remote controller over RS-485 or RS-422. The 10Mbps verified data-rate capability is useful for local laboratory and industrial test links, while the differential interface helps reduce susceptibility to ground offsets and common-mode noise. The PDIP package is convenient for legacy test equipment and service boards. Confirm signal levels, bus direction, cable length, and protection requirements before connecting instruments with different grounding arrangements.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX3485EPA+ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | SP3485EN-L | SP3485EP-L | MAX3485EPA | MAX3485CPA+ |
|---|---|---|---|---|---|
| Brand | Analog Devices | MaxLinear | MaxLinear | Analog Devices | Analog Devices |
| Package | 8-pin PDIP | 8-pin PDIP, verify against manufacturer datasheet | 8-pin PDIP, verify against manufacturer datasheet | 8-pin PDIP | 8-pin PDIP, verify ordering and pinout |
| Product Function | One-driver, one-receiver RS-485/RS-422 transceiver | RS-485/RS-422 transceiver, cross-reference result | RS-485/RS-422 transceiver, cross-reference result | MAX3485 RS-485/RS-422 transceiver | MAX3485 family transceiver |
Bảo phân biệt quan trọng
- Verified 3.3V operating range (vsSP3485EN-L)
- Verified 10Mbps data-rate capability (vsSP3485EP-L)
- Verified driver fault behavior (vsMAX3485CPA+)
- Verified fail-safe receiver behavior (vsSP3485EN-L)
Ghi chú thiết kế
The verified MAX3485EPA+ supply range is 3 V to 3.6 V, so the surrounding 3.3V system must remain within that range during startup, load transients, and fault conditions. Place the device’s normal bypass capacitors close to the supply and ground pins according to the manufacturer layout recommendations. The verified information does not specify a complete decoupling table, so do not infer capacitor values or power-dissipation limits without the datasheet.
Route the differential bus traces as a closely matched pair and keep the RS-485/RS-422 traces away from switching nodes and high-current paths. The MAX3485EPA+ uses differential signaling, but layout still affects signal integrity and common-mode noise. Confirm the 8-pin PDIP footprint from the official package drawing before layout release, especially because the verified search results include different MAX3485 package variants.
Do not assume short-circuit current limiting and thermal shutdown make external protection unnecessary. They improve fault behavior, but an RS-485 field cable can expose the interface to surge, ESD, and ground-potential hazards. Select external protection, grounding, bus termination, and biasing based on the installation environment. Also verify the transceiver’s direction-control logic so the bus is not driven during receive intervals.
The verified MAX3485EPA+ supports data rates up to 10Mbps and uses slew-rate limiting. At the highest rates, cable loss, reflections, stub lengths, loading, and termination placement become increasingly important. Use the shortest practical wiring, follow the bus topology, and validate signal integrity with the actual cable and remote-device loading rather than relying only on the nominal data-rate specification.
Thông tin tuân thủ
The supplied verified data does not include RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification declarations. The component is an interface IC and no automotive qualification was stated.