STMicroelectronics STR485 RS-485 Line Transceiver
STMicroelectronics STR485 RS-485 Line Transceiver is a low-power differential line transceiver for data transmission standard RS-485 applications in half-duplex mode. Data and enable signals are compatible with 1.8V or 3.3V supplies. Two speeds are selectable through the SLR pin: a fast data rate up to 20Mbps or a slow data rate for an extended cable running to 250kbps. Excessive power dissipation caused by bus contention or faults is prevented by a thermal shutdown circuit that forces the driver outputs into a high impedance state. The STMicroelectronics STR485 RS-485 Line Transceiver has a fail-safe feature, which guarantees a high output state when the inputs are left open, shorted or idle.
Features
- Half-duplex RS-485 transceiver
- 1.65V to 3.6V supply for data and enable signals
- 3V to 3.6V supply for bus supply
- Up to 20Mbps data rate
- 250kbps selected by SLR pin
- Up to 256 transceivers on the bus
- Fail-safe receiver (bus open, idle and shorted)
- Thermal shutdown protection
- Low quiescent current in shutdown mode
- -40°C to +105°C temperature range
- Available in industry standard DFN10
- Bus-pin protection more than
- ±4kV HBM protection
- ±8kV IEC61000-4-2 contact discharge
- ±16kV IEC61000-4-2 air discharge
- Compliant IEC61000-4-4 fast transient burst Class B
Applications
- Standard RS‑485, half‑duplex data transmission
- Low-voltage, low-power logic interfaces
- Multi-node Bus architectures
- Dual-speed operation
- Industrial and harsh environment use
- Fail-safe receiver functionality
- Compact PCB integration
Videos
Typical Application
Related Transceiver
STMicroelectronics STR485E Low Power Differential Line Transceiver
Ideal for standard RS485 applications in half-duplex mode.
Publié le: 2018-11-08
| Mis à jour le: 2025-10-23