STMicroelectronics ST4E12x High-Speed 3.3V/5V RS485 Transceivers
STMicroelectronics ST4E12x High-Speed 3.3V/5V RS485 Transceivers are low-power differential line transceivers for data transmission in standard RS485 applications in half-duplex mode. ST4E1216 and ST4E1240 are compatible with 3.3V or 5V rail power supplies and operate from 3V to 5.5V. These transceivers operate at data rates up to 16Mbps (ST4E1216) and 40Mbps (ST4E1240). The components are ideal for multipoint applications over extended cable runs and are robust to ESD transients. In particular, the bus pins support ±12kV IEC 61000-4-2 contact discharge. The STMicroelectronics ST4E12x High-Speed RS485 Transceivers also feature robust hot-swap capability during on/off switching or hot insertion. The transceivers are available in the standard SO-8 package and operate with a -40°C to +125°C (ST4E1216) and -40°C to +85°C (ST4E1240) temperature range.
Features
- Meets or exceeds TIA/EIA-485A standard requirements
- 3V to 5.5V supply voltage
- Differential output voltage (VOD) exceeds 2.1V at 5V supply for PROFIBUS compatibility
- High speed, up to 40Mbps data rate
- More than 64x transceivers on the bus (up to 100x nodes)
- Low quiescent current in shutdown mode
- Free-air operating temperature ranges
- -40°C to +125°C for ST4E1216
- -40°C to +85°C for ST4E1240
- Available in an industry-standard SO-8 package
- Integrated protections
- Fail-safe receiver (bus open, idle, and shorted)
- Thermal shutdown protection
- Hot-swap capability (with parasitic capacitance up to 100pF)
- Bus I/O ESD protection
- ±12kV IEC61000-4-2 contact discharge
- ≥±8kV HBM ESD
- ±4kV IEC61000-4-4 class-A fast transient burst (EFT)
Applications
- Factory automation and control
- Motion controllers
- Building automation and safety
- Video surveillance (building, traffic monitoring)
- Backplane busses
- Grid infrastructure
- Data acquisition (smart meters, seismic networks)
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