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 FeaturesESD 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 rangeHalf 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
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