Overview
The MAX3485EESA+T 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 MAX3483E to MAX3491E family, which offers a range of features and protections suitable for various industrial and telecommunications applications. Each device in this family contains one driver and one receiver, ensuring reliable and efficient data transmission.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Guaranteed Data Rate | - | - | - | - | 12 | Mbps |
| Supply Voltage | VCC | - | 3.0 | 3.3 | 3.6 | V |
| Duplex Mode | - | - | - | - | Half | - |
| Slew-Rate Limited Driver | - | - | No | - | - | - |
| Receiver Enable/Shutdown Current | - | - | - | - | 2 | nA |
| Pin Count | - | - | - | - | 8 | - |
| ESD Protection | - | - | ±15kV | - | - | Human Body Model |
| Common-Mode Input Voltage Range | - | - | -7 | - | 12 | V |
Key Features
- ESD Protection: ±15kV ESD protection for RS-485 I/O pins using the Human Body Model, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using IEC 1000-4-2 Air-Gap Discharge.
- Single 3.3V Supply: Operates from a single +3.3V supply without the need for a charge pump.
- Interoperability with +5V Logic: Compatible with +5V logic systems.
- High Data Rates: Guaranteed data rate of up to 12Mbps.
- Slew-Rate Limited Drivers: Minimizes EMI and reduces reflections caused by improperly terminated cables, ensuring error-free data transmission.
- Low-Current Shutdown Mode: 2nA low-current shutdown mode for power conservation.
- Common-Mode Input Voltage Range: -7V to +12V common-mode input voltage range.
- Full-Duplex and Half-Duplex Versions: Available in both full-duplex and half-duplex configurations.
- Industry-Standard Pinout: Industry-standard 75176 pinout for compatibility with existing designs.
- Current-Limiting and Thermal Shutdown: Drivers are short-circuit current-limited and protected against excessive power dissipation by thermal shutdown circuitry.
Applications
- Telecommunications: Suitable for telecommunications systems requiring reliable data transmission.
- Industrial-Control Local Area Networks: Ideal for industrial control networks where robust communication is essential.
- Transceivers for EMI-Sensitive Applications: Designed for applications sensitive to electromagnetic interference (EMI).
- Integrated Services Digital Networks: Used in integrated services digital networks (ISDN) for efficient data transmission.
- Packet Switching: Applicable in packet switching networks for reliable data communication.
Q & A
- What is the guaranteed data rate of the MAX3485EESA+T?
The MAX3485EESA+T has a guaranteed data rate of up to 12Mbps.
- What is the supply voltage range for the MAX3485EESA+T?
The device operates from a single +3.3V supply, with a range of 3.0V to 3.6V.
- Does the MAX3485EESA+T support full-duplex communication?
No, the MAX3485EESA+T is designed for half-duplex communication.
- What level of ESD protection does the MAX3485EESA+T offer?
The device offers ±15kV ESD protection using the Human Body Model, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using IEC 1000-4-2 Air-Gap Discharge.
- Is the MAX3485EESA+T compatible with +5V logic systems?
- What is the common-mode input voltage range for the MAX3485EESA+T?
- Does the MAX3485EESA+T have a low-current shutdown mode?
- What type of pinout does the MAX3485EESA+T use?
- How is the driver protected against overload in the MAX3485EESA+T?
- What are some typical applications for the MAX3485EESA+T?
