BSP48520AS

BSP485xxA is a series of noise-resistant RS-485 half-duplex transceivers designed for use in 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 a naturally ventilated environment. BSP485xxA devices are half-duplex transceivers optimized for RS-485 applications, meeting or exceeding the requirements of the TIA/EIA-485A standard, and are available in 500kbps and 20Mbps data rate options. The integrated ESD protection circuit ensures the transceiver remains undamaged during high-level ESD events, making it suitable for harsh application environments. When the bus is open, shorted, or idle, the receiver output maintains a logic high level without the need for external fail-safe bias resistors. An integrated thermal shutdown circuit disables the driver and forces the RO output to high impedance when the junction temperature exceeds 170°C (typical); the device re-enables when the junction temperature drops below 150°C (typical). The device operates normally over an 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
• 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
• 1/8 unit load (supports up to 256 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: BSP48505Ax: 500kbps, BSP48520Ax: 20Mbps