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1. Description
The ST3485EB, ST3485EC, ST3485EIDT and ST3485EIY devices are ±15 kV ESD protected, 3.3 V low power transceiver for RS-485 and RS-422 communications. These devices contain one driver and one receiver in half duplex configuration. These devices transmit and receive at a guaranteed data rate of at least 12 Mbps. All transmitter outputs and receiver inputs are protected to ±15 kV IEC 61000-4-2 air discharge. 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.
2. Features
1. ESD protection
– ±15 kV IEC 61000-4-2 air discharge
– ±8 kV IEC 61000-4-2 contact discharge
2. Operate from a single 3.3 V supply - no charge pump required
3. Interoperable with 5 V logic
4. 1 µA low current shutdown mode max.
5. Guaranteed 12 Mbps data rate
6. -7 to 12 V common mode input voltage range
7. Half duplex versions available
8. Industry standard 75176 pinout
9. Current limiting and thermal shutdown for driver overload protection
10. Guaranteed high receiver output state for floating inputs with no signal present
11. Allow up to 64 transceivers on the bus
12. Available in SO8 package
13. Automotive grade (ST3485EIY)
3. Pin configuration
4. Package information
