사양
| 속성 | 가치 |
| Supplier | Analog Devices Inc./Maxim Integrated |
| Package | Tube |
| ProductStatus | Active |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| NumberofDrivers/Receivers | 1/1 |
| Duplex | Half |
| ReceiverHysteresis | 70 mV |
| DataRate | 250kbps |
| Voltage-Supply | 4.75V ~ 5.25V |
| OperatingTemperature | -40°C ~ 85°C |
| MountingType | Through Hole |
| Package/Case | 8-DIP (0.300, 7.62mm) |
개요
Description
MAX487EEPA+ is an RS-485/RS-422 transceiver from Maxim Integrated (now part of Analog Devices). It provides a half‑duplex differential interface with both a driver and a receiver in one package, suitable for multi-point industrial networks.
Key points:
- Interfaces: DI, DE, RO, /RE, and differential A/B lines.
- Operation: single-supply (typical 4.5–5.5 V); DE and /RE control for driver/receiver enable.
- Features: failsafe receiver (known output on idle/open/shorted lines), robust protection on the bus, and extended temperature range (as indicated by the E/EE suffix) with RoHS/compliant packaging (PA+ variant).
- Applications: industrial control, building automation, remote sensors, data acquisition over RS-485/RS-422 networks.
Note: The exact electrical specs (data rate, thresholds, delays) depend on the specific part revision. For precise figures, consult the MAX487EEPA+ datasheet.
Key points:
- Interfaces: DI, DE, RO, /RE, and differential A/B lines.
- Operation: single-supply (typical 4.5–5.5 V); DE and /RE control for driver/receiver enable.
- Features: failsafe receiver (known output on idle/open/shorted lines), robust protection on the bus, and extended temperature range (as indicated by the E/EE suffix) with RoHS/compliant packaging (PA+ variant).
- Applications: industrial control, building automation, remote sensors, data acquisition over RS-485/RS-422 networks.
Note: The exact electrical specs (data rate, thresholds, delays) depend on the specific part revision. For precise figures, consult the MAX487EEPA+ datasheet.
Equivalent
Equivalent RS-485/RS-422 transceivers (8-pin, 5V) from other vendors include:
- TI SN65HVD178A (and SN65HVD179)
- STMicroelectronics SP485/SP487 families
- NXP Philips SP3485
- Analog Devices ADM485
Note: check exact pinout (DI/RO/DE/RE), Vcc, GND, and features to ensure true compatibility.
- TI SN65HVD178A (and SN65HVD179)
- STMicroelectronics SP485/SP487 families
- NXP Philips SP3485
- Analog Devices ADM485
Note: check exact pinout (DI/RO/DE/RE), Vcc, GND, and features to ensure true compatibility.
Features
Key features of MAX487EEPA+ (RS-485/RS-422 transceiver, 8-pin, lead-free, extended-temp):
- Half-duplex RS-485/RS-422 transceiver with DE/RE control
- Operates from a single 5 V supply; low quiescent current
- Up to 5 Mbps data rate (typical)
- ±60 V bus-fault protection on the A/B differential pins
- Fail-safe receiver: RO output is high when inputs are open, idle, or shorted
- Robust ESD/overvoltage protection on bus pins
- RoHS-compliant, extended-temperature range (EEPA+ packaging)
Note: Always check the latest datasheet for exact electrical specs and packaging details.
- Half-duplex RS-485/RS-422 transceiver with DE/RE control
- Operates from a single 5 V supply; low quiescent current
- Up to 5 Mbps data rate (typical)
- ±60 V bus-fault protection on the A/B differential pins
- Fail-safe receiver: RO output is high when inputs are open, idle, or shorted
- Robust ESD/overvoltage protection on bus pins
- RoHS-compliant, extended-temperature range (EEPA+ packaging)
Note: Always check the latest datasheet for exact electrical specs and packaging details.
Pinout
- Pin count: 8 pins.
- Function: RS-485/RS-422 transceiver (single-channel, half‑duplex) with A and B differential bus pins, DI input, RO output, DE (Driver Enable) and /RE (Receiver Enable) controls, plus VCC and GND.
- Function: RS-485/RS-422 transceiver (single-channel, half‑duplex) with A and B differential bus pins, DI input, RO output, DE (Driver Enable) and /RE (Receiver Enable) controls, plus VCC and GND.
Manufacturer
- Manufacturer: Maxim Integrated Products, Inc. (now part of Analog Devices, Inc.)
- What kind of company: A United States–based semiconductor company that designs and sells analog and mixed-signal integrated circuits; traditionally fabless (designs ICs and outsources manufacturing).
- What kind of company: A United States–based semiconductor company that designs and sells analog and mixed-signal integrated circuits; traditionally fabless (designs ICs and outsources manufacturing).
Application
MAX487EEPA+ is a robust 5V RS-485/RS-422 transceiver. Typical applications include:
- Industrial automation: PLCs, motor drives, sensors, I/O networks
- Building/process automation: HVAC, lighting, security systems
- Remote telemetry and data acquisition: SCADA, energy meters, remote sensors
- Multi-point RS-485 networks: Modbus RTU, BACnet, other industrial serial buses
- Point-to-point/half-duplex links in electrically noisy environments
- Instrumentation and test equipment requiring reliable 5V serial communication
- Industrial automation: PLCs, motor drives, sensors, I/O networks
- Building/process automation: HVAC, lighting, security systems
- Remote telemetry and data acquisition: SCADA, energy meters, remote sensors
- Multi-point RS-485 networks: Modbus RTU, BACnet, other industrial serial buses
- Point-to-point/half-duplex links in electrically noisy environments
- Instrumentation and test equipment requiring reliable 5V serial communication
Package
8-pin SOIC (small-outline) package; Pb-free/RoHS-compliant.
