Analog Devices Inc./Maxim Integrated MAX485EESA
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | RoHS non-compliant |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mfr | Analog Devices Inc./Maxim Integrated |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Type | Transceiver |
| Data Rate | 2.5Mbps |
| Receiver Hysteresis | 70 mV |
| Supplier Device Package | 8-SOIC |
| Voltage - Supply | 4.75V ~ 5.25V |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Package | Bulk |
| Product Status | Obsolete |
| REACH Status | REACH Affected |
| Standard Package | 1 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
MAX485EESA RS-485 Transceiver 15kV ESD Protection RS-422 Chip
The MAX485EESA is a low-power, half-duplex transceiver designed for robust industrial communication in harsh environments, supporting both RS-485 and RS-422 protocols. Engineered with a 15kV ESD protection rating (HBM), it ensures reliability in scenarios prone to electrostatic discharge, such as factory automation or outdoor installations. The device operates at a 5V power supply with a static current consumption as low as 300μA, making it ideal for battery-powered or energy-sensitive applications. Its data rate reaches up to 2.5Mbps, enabling high-speed transmission over differential signal lines, while the SOIC-8 (SOP-8) package facilitates compact PCB layouts and high-density integration. The transceiver features a single driver and receiver pair, with a propagation delay of 40ns–60ns, ensuring minimal latency in time-critical systems. Additionally, it supports up to 32 nodes on a shared bus and includes fault-protection mechanisms, such as open-circuit receiver outputs that default to logic-high states, preventing undefined behavior during disconnections.
Key Features and Applications
The MAX485EESA stands out for its industrial-grade temperature tolerance (-40°C to +85°C), enabling deployment in extreme climates without performance degradation. Its 15kV ESD protection exceeds standard requirements, safeguarding against transient voltage spikes from lightning strikes or power surges. The device's half-duplex architecture allows bidirectional communication on a single twisted-pair cable, reducing wiring costs in applications like HVAC systems, motor control, and data acquisition networks. In industrial automation, it connects PLCs, sensors, and actuators over distances up to 1.2km, while its low power draw extends device battery life in remote monitoring setups.
Alternative Models and Key Differences
● MAX485EESA+T: Extends the temperature range to -40°C to +125°C and adds fault-safe features for open-bus conditions, supporting up to 256 nodes.
● MAX485ESA: Similar to the EESA variant but with 300μA static current and commercial-grade temperature tolerance (0°C to +70°C), targeting cost-sensitive applications.
● MAX3085EESA: A direct alternative with identical pinout and 2.5Mbps data rate, offering enhanced ESD protection and lower power consumption (250μA).
● MAX485EESA-TD: Designed for 3.3V–5V mixed-voltage systems, maintaining 15kV ESD protection and 128-node support for flexible power designs.
