MAX1480CCPI+ - 250kbps Isolated RS-485/422 | Maxim Integrated
MPN： MAX1480CCPI+ ✓ 啟用中MAX1480CCPI+ 概覽
An RS-485/RS-422 transceiver is an interface IC that converts logic-level transmit and receive signals into balanced differential bus signals. The MAX1480 belongs to the broader isolated interface-IC hierarchy, where isolation provides a galvanic barrier between a communication bus and the controlling electronics. This helps protect systems from ground-potential differences and common-mode transients while supporting point-to-point and multidrop RS-485 or RS-422 communication networks.
The MAX1480CCPI+ uses a reduced-slew-rate driver to minimize electromagnetic interference and reduce reflected signaling on the bus. Its isolated outputs are stated to meet RS-485 and RS-422 specifications. Because one 5 V supply on the logic side powers both sides of the interface, the system does not require a separate isolated bus-side supply in the intended operating arrangement. The half-duplex architecture supports bidirectional communication over a shared differential pair when the application controls driver and receiver direction.
The MAX1480C family is implemented as a hybrid microcircuit in a 28-pin DIP package. The isolated interface integrates the physical-layer transceiver and isolation barrier rather than requiring a discrete optocoupler, transformer, and driver-receiver arrangement. This reduces component count and simplifies the physical isolation implementation, but designers must still account for creepage, isolation boundaries, bus termination, grounding, and protection requirements at the board level.
Typical uses include isolated RS-485 links in industrial controllers, HVAC and building-control networks, automated test equipment, local-area networks, and isolated data interfaces operating in EMI-sensitive environments. A 250 kbps data rate is suitable for moderate-speed supervisory, monitoring, and control traffic rather than the highest-speed industrial Ethernet protocols. The 28-pin through-hole DIP package also favors legacy, repairable, and industrial control-board designs.
When designing around the MAX1480CCPI+, place the device so its isolation boundary remains clearly defined, connect the logic ground and bus ground to their respective domains, and follow the bus-interface recommendations in the manufacturer datasheet. Termination, protection, and common-mode requirements depend on cable length, topology, and the external transceiver used. This page consolidates verified manufacturer and distributor information, drop-in alternatives, pricing, and practical selection guidance beyond a basic distributor listing.
直接替換替代品，適用於 MAX1480CCPI+ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MAX1480CCPI+ （相同外形與佔位） — 差異在於 Package, Product Type, Isolation, Driver Slew Rate, RoHS Status.
MAX1480ACPI+
✅ 直接替換聯絡詢價
查看資料表 →MAX1480BCPI+
✅ 直接替換聯絡詢價
查看資料表 →MAX1480CCPI+ 規格
| Product Type | Isolated RS-485/RS-422 transceiver |
| Driver and Receiver Configuration | 1 driver and 1 receiver |
| Duplex Mode | Half duplex |
| Maximum Data Rate | 250 kbps |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Isolation | Galvanically isolated logic-side and bus-side interfaces |
| Driver Slew Rate | Reduced slew rate |
| Supported Standards | RS-485 and RS-422 |
| 封裝 | 28-pin DIP, 0.600 in (15.24 mm) width |
| 安裝類型 | Through-hole |
| Logic-Side Supply | Single 5 V supply powers both sides of the interface |
| Driver Count | 1 |
| Receiver Count | 1 |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
MAX1480CCPI+ 28-pin dip, 0.600 in (15.24 mm) width 腳位配置指南
MAX1480CCPI+（28-pin dip, 0.600 in (15.24 mm) width 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： MAX1480CCPI+.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX1480CCPI+ 適用於 6 應用s: Industrial Control Networks, HVAC and Building Control, Automated Test Equipment, EMI-Sensitive Isolated Data Links, Local Area Bus Gateways, Remote Sensor and Actuator Networks.
Industrial Control Networks
The MAX1480CCPI+ fits isolated supervisory links between industrial controllers and field equipment because it combines one driver, one receiver, and a 250 kbps maximum data rate in a 28-pin DIP package. It is placed at the RS-485 or RS-422 boundary where the controller must communicate over a cable while remaining electrically separated from the bus. The reduced-slew-rate driver limits EMI and reflected signaling, while the single 4.5 V to 5.5 V supply simplifies the interface. Engineers should still verify the complete datasheet for common-mode limits, isolation rating, temperature range, termination, and transient protection before qualifying the part for an installation.
推薦
HVAC and Building Control
The MAX1480CCPI+ is applicable to HVAC and building-control networks that distribute commands and status over RS-485 or RS-422 wiring. Its 250 kbps data rate accommodates many monitoring and control messages, while electrical isolation helps the controller withstand ground-potential differences between building zones. The 28-pin DIP package is practical for through-hole industrial controllers and serviceable equipment. Using the reduced-slew-rate driver can improve EMI behavior around building wiring, but designers must maintain the isolation boundary, apply appropriate bus termination, and verify surge and ground-fault conditions against the complete manufacturer specifications.
推薦
Automated Test Equipment
The MAX1480CCPI+ can serve as the isolated communications interface in automated test equipment that must exchange RS-485 or RS-422 commands with external fixtures or instruments. Isolation reduces the risk of ground-potential interference between test-station electronics and remote equipment, while the 250 kbps rate supports moderate-speed control traffic. Its one-driver, one-receiver arrangement allows a half-duplex link when direction is managed by the test controller. Board layout must preserve creepage and isolation clearances, and the bus side should be checked for ESD, surge, and cable-length requirements that are outside the supplied excerpts.
推薦
EMI-Sensitive Isolated Data Links
The MAX1480CCPI+ is specifically suited to EMI-sensitive isolated data interfaces because its reduced-slew-rate driver minimizes electromagnetic interference and reflected bus signaling. The 250 kbps maximum data rate is appropriate for low- to moderate-speed data paths where predictable edges and reduced emissions are more valuable than maximum throughput. Its integrated isolation provides a galvanic barrier between the logic-side controller and the bus side. Layout should include short bus connections, controlled return paths, suitable protection, and verified isolation spacing; the reduced slew rate alone is not a substitute for a complete EMC-compliant interface design.
推薦
Local Area Bus Gateways
The MAX1480CCPI+ can provide the isolated physical interface on a gateway that bridges a host controller to an RS-485 or RS-422 local-area network. The half-duplex, one-driver and one-receiver arrangement supports shared-bus communication when the gateway controls transmit direction, and the 250 kbps rate suits supervisory and configuration traffic. The 28-pin DIP package supports repairable and legacy-style controller boards. Actual deployment requires checking the complete datasheet for bus-drive capability, timing, common-mode range, termination strategy, isolation rating, and environmental limits, because those details are not quantified in the supplied search excerpts.
推薦
Remote Sensor and Actuator Networks
The MAX1480CCPI+ can interface remote sensors and actuators in a wired monitoring system using RS-485 or RS-422 differential signaling. Isolation helps protect the local controller from ground shifts and common-mode disturbances encountered on field wiring, while the 250 kbps rate is adequate for many periodic measurement and command sequences. The reduced-slew-rate driver reduces EMI and reflected transitions on the bus. For long cables or industrial environments, engineers should add the required termination and surge protection and confirm the device’s common-mode voltage, isolation withstand, and environmental specifications from the complete manufacturer datasheet.
推薦
推薦產品摘要
工程參考資料，適用於 MAX1480CCPI+ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MAX1480ACPI+ | MAX1480BCPI+ |
|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 28-pin DIP | 28-pin DIP | 28-pin DIP |
| Product Type | Isolated RS-485/RS-422 transceiver | Isolated RS-485/RS-422 transceiver | Isolated RS-485/RS-422 transceiver |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Isolation | Electrically isolated | Electrically isolated | Electrically isolated |
| Supported Bus Standards | RS-485 and RS-422 | RS-485 and RS-422 | RS-485 and RS-422 |
主要差異化特點
- Complete isolation and differential interface integrated in one device (對比MAX1480BCPI+)
- Confirmed 28-pin DIP family footprint (對比MAX1480ACPI+)
- Reduced-slew-rate driver for lower EMI (對比MAX1480ACPI+)
- Single logic-side supply architecture (對比MAX1480BCPI+)
設計說明
Preserve a continuous isolation barrier across the board rather than routing logic-side or bus-side copper beneath the transceiver. Keep bus traces short, use a solid ground reference on each side, and place any required protection close to the connector so surge current does not flow through sensitive circuitry. The supplied manufacturer material identifies the MAX1480 as an electrically isolated interface, but exact creepage, clearance, and isolation-body dimensions must be taken from the complete datasheet and package drawing.
Use the reduced-slew-rate driver as intended, but do not rely on it as the only EMI-control measure. Match differential pair geometry where practical, minimize stub lengths, place termination only where required by the bus topology, and route the pair away from switching nodes and clocks. The verified 250 kbps data rate helps constrain edge-rate-related emissions, yet cable length, connector construction, grounding, and shielding can determine practical EMC performance in the finished equipment.
Confirm direction-control logic before using the half-duplex interface because the device contains one driver and one receiver. Releasing the bus at the correct time prevents the driver from fighting another transmitter, while receiver enable should be managed to avoid unwanted echo or contention. Also verify common-mode voltage, isolation withstand voltage, temperature range, and external protection requirements from the complete datasheet; those values are not present in the supplied excerpts and should not be guessed.
Decouple the 4.5 V to 5.5 V logic-side supply at the device using the capacitor values and grounding arrangement specified in the manufacturer datasheet. The verified description states that one 5 V supply on the logic side powers both sides of the interface, so designers should not assume a conventional non-isolated transceiver layout. Keep high-current return paths away from the isolated bus-side reference and validate startup, supply tolerance, and power-sequencing requirements on the final board.
合規資訊
The supplied excerpts do not provide verified RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations for MAX1480CCPI+.
