Overview
The ST3485EBDR, produced by STMicroelectronics, is a 3.3 V powered, low-power transceiver designed for RS-485 and RS-422 communication protocols. This device features a half-duplex configuration with one driver and one receiver, capable of transmitting and receiving data at a guaranteed rate of up to 12 Mbps. It is notable for its high level of protection against electrostatic discharge (ESD), withstanding ±15 kV IEC 61000-4-2 air discharge and ±8 kV IEC 61000-4-2 contact discharge. The ST3485EBDR operates from a single 3.3 V supply without the need for a charge pump and is interoperable with 5 V logic. It is available in a small SO8 package and includes an automotive grade option (ST3485EIY) that meets AEC-Q100 standards.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Supply Voltage | 3.3 V (3 V to 3.6 V) |
| Data Rate | Up to 12 Mbps |
| ESD Protection | ±15 kV IEC 61000-4-2 air discharge, ±8 kV IEC 61000-4-2 contact discharge |
| Common Mode Input Voltage Range | -7 to 12 V |
| Shutdown Current | 1 µA max |
| Package Type | SO8 |
| Operating Temperature Range | -40 to 125 °C (depending on the grade) |
| Number of Channels | 2 (one driver, one receiver) |
| Interface | RS-485 and RS-422 |
| Pinout | Industry standard 75176 pinout |
Key Features
- High ESD protection: ±15 kV IEC 61000-4-2 air discharge and ±8 kV IEC 61000-4-2 contact discharge.
- Operates from a single 3.3 V supply without a charge pump.
- Interoperable with 5 V logic.
- Low current shutdown mode: 1 µA max.
- Guaranteed 12 Mbps data rate.
- Wide common mode input voltage range: -7 to 12 V.
- Half-duplex configuration.
- Industry standard 75176 pinout.
- Current limiting and thermal shutdown for driver overload protection.
- Guaranteed high receiver output state for floating inputs with no signal present.
- Allows up to 64 transceivers on the bus.
- Automotive grade option (ST3485EIY) meeting AEC-Q100 standards.
Applications
The ST3485EBDR is suitable for various applications, including:
- Communications equipment.
- Computers and peripherals.
- Industrial automation and control systems.
- Automotive systems, particularly with the automotive grade option (ST3485EIY).
Q & A
- What is the operating supply voltage of the ST3485EBDR?
The ST3485EBDR operates from a single 3.3 V supply (3 V to 3.6 V).
- What is the maximum data rate of the ST3485EBDR?
The ST3485EBDR can transmit and receive data at a guaranteed rate of up to 12 Mbps.
- What level of ESD protection does the ST3485EBDR offer?
The ST3485EBDR offers ±15 kV IEC 61000-4-2 air discharge and ±8 kV IEC 61000-4-2 contact discharge ESD protection.
- What is the common mode input voltage range of the ST3485EBDR?
The common mode input voltage range is -7 to 12 V.
- What is the shutdown current of the ST3485EBDR?
The shutdown current is 1 µA max.
- In what package is the ST3485EBDR available?
The ST3485EBDR is available in an SO8 package.
- What are the operating temperature ranges for the ST3485EBDR?
The operating temperature range is -40 to 125 °C, depending on the specific grade.
- How many channels does the ST3485EBDR have?
The ST3485EBDR has one driver and one receiver, making it a half-duplex configuration.
- What interfaces does the ST3485EBDR support?
The ST3485EBDR supports RS-485 and RS-422 communication protocols.
- Is the ST3485EBDR suitable for automotive applications?
Yes, the ST3485EBDR has an automotive grade option (ST3485EIY) that meets AEC-Q100 standards.
