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ST4485EB：3.3 V powered, 15 kV ESD protected, up to 20 Mbps RS-485/RS-422 transceiver, [-40oC, 105oC] temperature range

The ST4485EB device is a ± 15 kV ESD protected, 3.3 V low power transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in half duplex configuration.

The ST4485EB transmits and receives at a guaranteed data rate of at least 20 Mbps.

All transmitter outputs and receiver inputs are protected to ± 15 kV using “Human Body Model”.

The driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state.

Key Features

• ESD protection
  • ± 15 kV human body model
  • ± 8 kV IEC 1000-4-2 contact discharge
• Operate from a single 3.3 V supply - no charge pump required
• Interoperable with 5 V logic
• 1 μA low current shutdown mode max.
• Guaranteed 20 Mbps data rate
• -7 to 12 V common mode input voltage range
• Half duplex versions available
• 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
• Allow up to 64 transceivers on the bus
• Wide operating temperature range: -40 to +105 °C

Product Specifications

Application Notes

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Quality & Reliability