Overview
The ST3485EIYDT is a 3.3 V low-power transceiver designed for RS-485 and RS-422 communications, manufactured by STMicroelectronics. This device is part of the ST3485EB, ST3485EC, ST3485EI, and ST3485EIY family and is specifically tailored for automotive applications. It features high ESD protection, low power consumption, and a guaranteed data rate of up to 12 Mbps. The ST3485EIYDT is available in an SO8 package and is designed to operate in harsh environments, making it suitable for a variety of industrial and automotive communication systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 3 V to 3.6 V | V |
| ESD Protection | ±15 kV IEC 61000-4-2 air discharge, ±8 kV IEC 61000-4-2 contact discharge | kV |
| Data Rate | Up to 12 Mbps | Mbps |
| Shutdown Current | 1 µA max. | µA |
| Common Mode Input Voltage Range | -7 to 12 V | V |
| Driver Output Voltage | ±14 V | V |
| Receiver Input Resistance | 24 kΩ | kΩ |
| Operating Temperature Range | -40 to 125 °C | °C |
| Package Type | SO8 | - |
Key Features
- ±15 kV ESD protection for both air and contact discharge, ensuring robustness against electrical surges.
- Operates from a single 3.3 V supply without the need for a charge pump.
- Interoperable with 5 V logic, enhancing compatibility with various systems.
- Low current shutdown mode with a maximum of 1 µA, reducing power consumption when not in use.
- Guaranteed data rate of up to 12 Mbps, supporting high-speed communication.
- Half duplex configuration with one driver and one receiver.
- Industry standard 75176 pinout for ease of integration.
- Current limiting and thermal shutdown for driver overload protection.
- High receiver output state for floating inputs with no signal present.
- Supports up to 64 transceivers on the bus.
- Automotive grade, suitable for harsh automotive environments.
Applications
- Automotive communication systems, including in-vehicle networks and diagnostic interfaces.
- Industrial control systems, such as those used in manufacturing and process control.
- Remote sensing and monitoring applications where reliable and high-speed data transmission is critical.
- Building automation and smart home systems requiring robust and efficient communication.
- Medical devices and equipment that demand high reliability and low power consumption.
Q & A
- What is the primary function of the ST3485EIYDT?
The ST3485EIYDT is a transceiver for RS-485 and RS-422 communications, designed to transmit and receive data at high speeds.
- What is the operating voltage range of the ST3485EIYDT?
The ST3485EIYDT operates from a single 3.3 V supply, with a voltage range of 3 V to 3.6 V.
- What level of ESD protection does the ST3485EIYDT offer?
The ST3485EIYDT offers ±15 kV ESD protection for air discharge and ±8 kV for contact discharge, according to IEC 61000-4-2 standards.
- What is the maximum data rate supported by the ST3485EIYDT?
The ST3485EIYDT supports a guaranteed data rate of up to 12 Mbps.
- What is the shutdown current of the ST3485EIYDT?
The shutdown current of the ST3485EIYDT is a maximum of 1 µA.
- What is the common mode input voltage range for the ST3485EIYDT?
The common mode input voltage range for the ST3485EIYDT is -7 to 12 V.
- Is the ST3485EIYDT suitable for automotive applications?
Yes, the ST3485EIYDT is automotive grade and suitable for harsh automotive environments.
- What package type is the ST3485EIYDT available in?
The ST3485EIYDT is available in an SO8 package.
- How many transceivers can be supported on the bus with the ST3485EIYDT?
The ST3485EIYDT supports up to 64 transceivers on the bus.
- What kind of protection does the ST3485EIYDT offer against driver overload?
The ST3485EIYDT offers current limiting and thermal shutdown protection against driver overload.
