BSP48505S

BSP485xx is a series of noise-resistant RS-485 half-duplex transceivers designed for harsh industrial and power environments. The bus pins of these devices can withstand high-level ESD events, protecting the internal circuitry from damage. This series supports an operating voltage range of 3V to 5.5V and is available in compact SOIC8, MSOP8, and DFN8 packages, suitable for space-constrained and multi-point applications over long cables. These devices operate over a temperature range of -40°C to 125°C in naturally ventilated environments. BSP485xx devices are half-duplex transceivers optimized for RS-485 applications, meeting or exceeding the requirements of the TIA/EIA-485A standard, with data rate options of 500kbps and 20Mbps. The internal ESD protection circuitry ensures the transceiver remains undamaged during high-level ESD events, making it suitable for harsh application environments. With an open, shorted, or idle bus, the receiver output maintains a logic-high level without the need for external fail-safe bias resistors. An integrated over-temperature protection circuit disables the driver and sets the RO output to high impedance when the junction temperature exceeds 200°C (typical); the device re-enables when the junction temperature drops to 175°C (typical). The device operates normally over the extended industrial temperature range of -40°C to 125°C.

Applications

• Factory automation and control
• Power measurement (smart meters)
• Building automation
• HVAC systems
• Video surveillance
• Wireless infrastructure

Key features

• Half-duplex RS-485 transceiver meeting or exceeding TIA/EIA-485A standard requirements
• 3V to 5.5V supply voltage
• Driver differential output voltage exceeding 2.1V at 5V supply, PROFIBUS compatible
• Current-limiting driver with thermal shutdown
• Bus I/O ESD protection: ±20kV HBM ESD, ±4kV IEC 61000-4-2 contact discharge
• 1/2 unit load (supports up to 64 bus nodes)
• Open-circuit, short-circuit, and idle bus fail-safe protection
• Extended industrial operating temperature range: -40°C to 125°C
• Common-mode voltage range: -7V to 12V
• Standby current: <5μA
• Glitch-free power-up and power-down
• Multiple package options: SOIC8, MSOP8, and DFN8
• Data rate: BSP48505x: 500kbps, BSP48520x: 20Mbps