Thông số kỹ thuật
| thuộc tính | Giá trị |
| Package | Tube |
| ProductStatus | Obsolete |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| NumberofDrivers/Receivers | 1/1 |
| Duplex | Half |
| ReceiverHysteresis | 70 mV |
| DataRate | 250kbps |
| Voltage-Supply | 4.75V ~ 5.25V |
| OperatingTemperature | 0°C ~ 70°C |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
Tổng quan
Description
MAX487ECSA is an 8-pin low-power RS-485/RS-422 transceiver from Maxim Integrated (now part of Analog Devices). It combines a differential driver and receiver for half‑duplex, two‑wire twisted-pair communication, typically used on a single bus with A and B lines. It operates from a 5V supply and offers a small 1/8 unit load, enabling many nodes on a single bus. Key features include a failsafe receiver (RO goes high when the bus is idle or open/shorted), separate driver-enable (DE) and receiver-enable (RE) controls, and 3-state outputs. The ECSA suffix indicates extended temperature operation (and the specific 8-pin SOIC package).
Typical use: industrial automation, building automation, process control, and data acquisition networks. Pinout basics: DI (data input), RO (data output), DE, RE, A, B, Vcc, GND. For precise electrical characteristics and pinout, consult the MAX487ECSA datasheet.
Typical use: industrial automation, building automation, process control, and data acquisition networks. Pinout basics: DI (data input), RO (data output), DE, RE, A, B, Vcc, GND. For precise electrical characteristics and pinout, consult the MAX487ECSA datasheet.
Equivalent
Equivalent products to MAX487ECSA are other RS-485/RS-422 transceivers from major vendors. Examples:
- Analog Devices: ADM485
- STMicroelectronics: SP485, SP487
- Texas Instruments: SN65HVDxx family
- Microchip: MCP2551, MCP2552
- NXP: PCA82C250/251
Note: verify pinout, supply (typically 4.5–5.5V), data rate, and unit load to ensure true compatibility (8-pin package).
- Analog Devices: ADM485
- STMicroelectronics: SP485, SP487
- Texas Instruments: SN65HVDxx family
- Microchip: MCP2551, MCP2552
- NXP: PCA82C250/251
Note: verify pinout, supply (typically 4.5–5.5V), data rate, and unit load to ensure true compatibility (8-pin package).
Pinout
- Pin count: 8 pins (8-pin package, e.g., SOIC).
- Function: One-channel RS-485/RS-422 transceiver with both driver and receiver. DI data in -> RO data out; differential bus on A/B; DE (driver enable) and /RE (receiver enable) control; power (Vcc) and ground (GND). Used for converting to/from differential RS-485/422 signals.
- Function: One-channel RS-485/RS-422 transceiver with both driver and receiver. DI data in -> RO data out; differential bus on A/B; DE (driver enable) and /RE (receiver enable) control; power (Vcc) and ground (GND). Used for converting to/from differential RS-485/422 signals.
Manufacturer
- Manufacturer: Maxim Integrated (now part of Analog Devices).
- What kind of company: A US semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (now part of Analog Devices, a global semiconductor company).
- What kind of company: A US semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (now part of Analog Devices, a global semiconductor company).
Application
MAX487ECSA is an RS-485/RS-422 transceiver. Common applications include:
- Industrial automation (PLC/SCADA, RTU networks)
- Building automation and security systems
- Data acquisition and instrumentation over differential links
- Multi-point RS-485 networks (long-distance over twisted pair)
- Remote sensors, telemetry, and smart metering
- Robotics and industrial process control
- Harsh or electrically noisy environments requiring robust differential signaling
- Industrial automation (PLC/SCADA, RTU networks)
- Building automation and security systems
- Data acquisition and instrumentation over differential links
- Multi-point RS-485 networks (long-distance over twisted pair)
- Remote sensors, telemetry, and smart metering
- Robotics and industrial process control
- Harsh or electrically noisy environments requiring robust differential signaling
Package
MAX487ECSA comes in an 8-pin surface-mount SOIC package (SOP-8).
