Overview
The MAX3485ESA+ is a 3.3V, low-power transceiver designed for RS-485 and RS-422 communication, manufactured by Analog Devices Inc./Maxim Integrated. This device is part of the MAX348x family and is optimized for applications requiring high-speed data transmission and robust protection against environmental and electrical stresses.
The MAX3485ESA+ operates from a single 3.3V supply, eliminating the need for a charge pump, and is interoperable with +5V logic. It features a half-duplex configuration, making it suitable for a variety of industrial and telecommunications applications.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Supply Voltage | Operating voltage range | 3.0V to 3.6V |
| Data Rate | Maximum data transmission rate | Up to 10Mbps |
| Duplex Mode | Communication mode | Half-Duplex |
| Package Type | Physical package of the IC | 8-SOIC (Surface Mount) |
| Operating Temperature | Temperature range for operation | -40°C to +85°C |
| ESD Protection | Electrostatic discharge protection level | ±20kV HBM, ±15kV Air-Gap, ±8kV Contact |
| Receiver Input Impedance | Input impedance of the receiver | 1-unit load |
| Common-Mode Input Voltage Range | Allowed common-mode voltage range | -7V to +12V |
| Shutdown Current | Current in shutdown mode | 2nA |
Key Features
- Single 3.3V Supply: Operates without the need for a charge pump.
- Interoperable with +5V Logic: Compatible with both 3.3V and 5V logic systems.
- High-Speed Data Rates: Supports data rates up to 10Mbps.
- Slew-Rate Limited Drivers: Minimizes EMI and reduces reflections for error-free data transmission.
- Low-Current Shutdown Mode: Consumes only 2nA in shutdown mode.
- Enhanced ESD Protection: Protected to ±20kV HBM, ±15kV Air-Gap, and ±8kV Contact ESD.
- True Fail-Safe Receiver: Ensures a logic-high output if both inputs are open circuit, shorted, or connected to a three-state bus.
- Hot-Swap Capability: Eliminates false transitions during power-up or hot insertion.
- Current-Limiting and Thermal Shutdown: Protects against driver overload.
- Industry Standard Pinout: Compatible with the industry standard 75176 pinout.
Applications
- Industrial-Control Local Area Networks: Suitable for industrial automation and control systems.
- Telecommunications: Used in various telecommunications equipment and networks.
- EMI-Sensitive Applications: Ideal for environments where electromagnetic interference is a concern.
Q & A
- What is the operating voltage range of the MAX3485ESA+?
The MAX3485ESA+ operates from a single 3.3V supply, with a voltage range of 3.0V to 3.6V.
- What is the maximum data rate supported by the MAX3485ESA+?
The MAX3485ESA+ supports data rates up to 10Mbps.
- What is the duplex mode of the MAX3485ESA+?
The MAX3485ESA+ operates in half-duplex mode.
- What type of package does the MAX3485ESA+ come in?
The MAX3485ESA+ is available in an 8-SOIC (Surface Mount) package.
- What is the operating temperature range of the MAX3485ESA+?
The operating temperature range is -40°C to +85°C.
- What level of ESD protection does the MAX3485ESA+ offer?
The MAX3485ESA+ offers ±20kV HBM, ±15kV Air-Gap, and ±8kV Contact ESD protection.
- How many transceivers can be connected on the bus with the MAX3485ESA+?
The MAX3485ESA+ allows up to 32 transceivers on the bus.
- What is the common-mode input voltage range of the MAX3485ESA+?
The common-mode input voltage range is -7V to +12V.
- What is the shutdown current of the MAX3485ESA+?
The shutdown current is 2nA.
- Does the MAX3485ESA+ have hot-swap capability?
Yes, the MAX3485ESA+ has hot-swap capability, eliminating false transitions during power-up or hot insertion.
