Overview
The MAX3485ESA+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 MAX3483 to MAX3491 family, which offers various configurations for different communication needs. The MAX3485ESA+T operates in half-duplex mode and is optimized for high-speed data transmission up to 10Mbps. It features a single 3.3V supply operation, eliminating the need for a charge pump, and is interoperable with +5V logic systems. The transceiver includes advanced protection mechanisms such as short-circuit protection, thermal shutdown, and enhanced electrostatic discharge (ESD) protection.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Supply Voltage | 3.0 to 3.6 | V |
| Data Rate | Up to 10 | Mbps |
| Duplex Mode | Half-Duplex | |
| Number of Drivers/Receivers | 1/1 | |
| Package Type | 8-SOIC | |
| Operating Temperature | -40°C to +85°C | |
| Receiver Hysteresis | 50 mV | |
| Shutdown Current | 2 nA | |
| Common-Mode Input Voltage Range | -7V to +12V | |
| ESD Protection | ±20kV HBM, ±15kV Air-Gap, ±8kV Contact |
Key Features
- Operates from a single 3.3V supply without a charge pump.
- Interoperable with +5V logic systems.
- High-speed data rates up to 10Mbps.
- Slew-rate limited for errorless data transmission (in other models of the series).
- Low-current shutdown mode (2 nA).
- -7V to +12V common-mode input voltage range.
- Allows up to 32 transceivers on the bus.
- Industry standard 75176 pinout.
- Current-limiting and thermal shutdown for driver overload protection.
- True fail-safe receiver to prevent false transitions on receiver input short or open events.
- Enhanced ESD protection (±20kV HBM, ±15kV Air-Gap, ±8kV Contact).
Applications
- Telecommunications.
- Industrial-control local area networks.
- Transceivers for EMI-sensitive applications.
- Other applications requiring reliable, high-speed RS-485 and RS-422 communication.
Q & A
- What is the operating supply voltage of the MAX3485ESA+T? The operating supply voltage is 3.0V to 3.6V.
- What is the maximum data rate supported by the MAX3485ESA+T? The maximum data rate is up to 10Mbps.
- What is the duplex mode of the MAX3485ESA+T? The MAX3485ESA+T operates in half-duplex mode.
- What is the package type of the MAX3485ESA+T? The package type is 8-SOIC.
- What is the operating temperature range of the MAX3485ESA+T? The operating temperature range is -40°C to +85°C.
- Does the MAX3485ESA+T have ESD protection? Yes, it has enhanced ESD protection (±20kV HBM, ±15kV Air-Gap, ±8kV Contact).
- How many transceivers can be connected on the bus with the MAX3485ESA+T? Up to 32 transceivers can be connected on the bus.
- What is the shutdown current of the MAX3485ESA+T? The shutdown current is 2 nA.
- Is the MAX3485ESA+T interoperable with +5V logic systems? Yes, it is interoperable with +5V logic systems.
- What is the common-mode input voltage range of the MAX3485ESA+T? The common-mode input voltage range is -7V to +12V.
