Overview
The ST1480ABDR is a 3.3 V powered, low-power transceiver designed for RS-485 and RS-422 communications, manufactured by STMicroelectronics. This device is part of the ST1480Ax series and features high-level ESD protection and a guaranteed data rate of up to 12 Mbps. It is configured in a half-duplex mode, containing one driver and one receiver. The transceiver is optimized for low power consumption and includes several protection mechanisms such as current limiting and thermal shutdown for driver overload protection.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 3 to 3.6 | V |
| Temperature Range | -40 to 85 | °C |
| Package Type | SO-8 (tape & reel) | |
| Data Rate | Up to 12 | Mbps |
| ESD Protection | ±15 kV (Human Body Model), ±8 kV (IEC 1000-4-2 contact discharge) | kV |
| Shutdown Supply Current | 0.002 to 1 | µA |
| Driver Output Voltage | ±14 | V |
| Receiver Input Voltage Range | -7 to 12 | V |
| Receiver Output High Voltage | 2 | V |
| Receiver Output Low Voltage | 0.4 | V |
Key Features
- Operates from a single 3.3 V supply without the need for a charge pump.
- Interoperable with 5 V logic.
- Low current shutdown mode (max 1 µA).
- Guaranteed 12 Mbps data rate.
- ±15 kV ESD protection (Human Body Model) and ±8 kV ESD protection (IEC 1000-4-2 contact discharge).
- Current limiting and thermal shutdown for driver overload protection.
- True fail-safe feature ensuring a logic high output if inputs are open circuit, shorted together, or in the presence of a termination with no signal.
- Allows up to 64 transceivers on the bus.
- Industry standard 75176 pinout.
Applications
The ST1480ABDR is suitable for a variety of applications requiring reliable and high-speed RS-485 and RS-422 communication. These include:
- Industrial automation systems.
- Building automation and control systems.
- Medical devices requiring robust communication interfaces.
- Automotive systems where high reliability and ESD protection are crucial.
- Point-of-sale terminals and other commercial equipment.
Q & A
- What is the operating voltage range of the ST1480ABDR?
The ST1480ABDR operates from a single 3.3 V supply, with a voltage range of 3 to 3.6 V. - What is the maximum data rate supported by the ST1480ABDR?
The ST1480ABDR supports a guaranteed data rate of up to 12 Mbps. - What level of ESD protection does the ST1480ABDR offer?
The ST1480ABDR offers ±15 kV ESD protection according to the Human Body Model and ±8 kV ESD protection according to IEC 1000-4-2 contact discharge. - How many transceivers can be connected on the same bus using the ST1480ABDR?
Up to 64 transceivers can be connected on the same bus. - What is the shutdown supply current of the ST1480ABDR?
The shutdown supply current is between 0.002 and 1 µA. - Is the ST1480ABDR compatible with 5 V logic?
Yes, the ST1480ABDR is interoperable with 5 V logic. - What is the temperature range for the ST1480ABDR?
The temperature range is -40 to 85 °C. - What type of package is the ST1480ABDR available in?
The ST1480ABDR is available in an SO-8 package (tape & reel). - Does the ST1480ABDR have any built-in protection mechanisms?
Yes, it includes current limiting and thermal shutdown for driver overload protection. - What is the receiver output high voltage of the ST1480ABDR?
The receiver output high voltage is 2 V.
