Specifications
| Attribute | Value |
| Supplier | Analog Devices Inc./Maxim Integrated |
| 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 | Through Hole |
| Package/Case | 8-DIP (0.300, 7.62mm) |
Overview
Description
MAX487ECPA is Maxim’s 5V RS-485/RS-422 transceiver in an 8-pin Pb-free package with extended temperature range. It provides a differential line driver and receiver for half‑duplex, two‑wire bus (A/B) networks with DE and RE# control for easy direction management. Key features include a failsafe receiver (guaranteed logic-high output when inputs are open, idle, or shorted), robust ESD protection on the bus pins, and low-power operation. Data rates reach a few Mbps depending on bus length, termination, and layout. Typical applications are multi‑point industrial networks, building automation, and other RS‑485/RS‑422 links. Package: ECPA (Pb-free, extended temperature). For exact electrical specs and pinout, consult the MAX487ECPA datasheet.
Equivalent
MAX487ECPA is an RS-485/RS-422 transceiver. Common cross-reference equivalents from other vendors include:
- Analog Devices ADM485
- STMicroelectronics ST485 (ST485/ST485E)
- Microchip MCP4851 / MCP4852
- Texas Instruments SN65HVD178 / SN65HVD178A
Note: check voltage, data rate, fail-safe, and DI/DE control features in datasheets to ensure proper substitution.
- Analog Devices ADM485
- STMicroelectronics ST485 (ST485/ST485E)
- Microchip MCP4851 / MCP4852
- Texas Instruments SN65HVD178 / SN65HVD178A
Note: check voltage, data rate, fail-safe, and DI/DE control features in datasheets to ensure proper substitution.
Features
MAX487ECPA is a high‑speed, half‑duplex RS-485/RS-422 transceiver. Key features:
- 5V single‑supply operation
- Data rates up to about 5 Mbps
- 1/8 unit‑load receiver for multi‑drops on the bus
- Fail‑safe receiver output (logic high when inputs are open/shorted/idle)
- Full 3‑state outputs with separate DE (driver enable) and RE (receiver enable)
- Robust protection: ESD/IEC protection on bus pins; short‑circuit protection and thermal shutdown
- Low‑power operation with quiet standby
- Available in an 8‑pin ECPA package with extended temperature options
Note: exact temperature range and electrical specs vary by revision; check the latest datasheet for exact figures.
- 5V single‑supply operation
- Data rates up to about 5 Mbps
- 1/8 unit‑load receiver for multi‑drops on the bus
- Fail‑safe receiver output (logic high when inputs are open/shorted/idle)
- Full 3‑state outputs with separate DE (driver enable) and RE (receiver enable)
- Robust protection: ESD/IEC protection on bus pins; short‑circuit protection and thermal shutdown
- Low‑power operation with quiet standby
- Available in an 8‑pin ECPA package with extended temperature options
Note: exact temperature range and electrical specs vary by revision; check the latest datasheet for exact figures.
Pinout
- Pin count: 8 pins (DIP8/SOIC8)
- Function: RS-485/RS-422 half‑duplex transceiver (driver + receiver) with DI, RO, DE, /RE, A, B, Vcc, GND.
- Function: RS-485/RS-422 half‑duplex transceiver (driver + receiver) with DI, RO, DE, /RE, A, B, Vcc, GND.
Manufacturer
- Manufacturer: Maxim Integrated Products (now part of Analog Devices, Inc., ADI).
- What kind of company: A semiconductor company that designs and sells analog and mixed-signal integrated circuits; historically fabless (outsources fabrication).
- What kind of company: A semiconductor company that designs and sells analog and mixed-signal integrated circuits; historically fabless (outsources fabrication).
Application
MAX487ECPA is a differential RS-485/RS-422 transceiver. Typical applications include:
- Industrial automation and control (PLC interfaces, motor drives, remote I/O)
- Building automation (HVAC, lighting, security)
- Remote data acquisition and telemetry (SCADA, data loggers)
- Multi-point RS-485 networks in noisy environments and long cable runs
- Instrumentation and measurement equipment
- Energy meters and utility sensing devices
In short: robust, long-distance, multi-point serial communications over twisted-pair in harsh environments.
- Industrial automation and control (PLC interfaces, motor drives, remote I/O)
- Building automation (HVAC, lighting, security)
- Remote data acquisition and telemetry (SCADA, data loggers)
- Multi-point RS-485 networks in noisy environments and long cable runs
- Instrumentation and measurement equipment
- Energy meters and utility sensing devices
In short: robust, long-distance, multi-point serial communications over twisted-pair in harsh environments.
Package
MAX487ECPA comes in an 8-pin Plastic DIP (DIP-8) package.
