Key Specifications

 

UM3481 series are ±18V fault-protected, half-duplex, RS-485 transceivers operating on a single 3V to 5.5V supply voltage. Bus interface pins are protected against overvoltage conditions during all modes of operation ensuring robust communication in rugged industrial environments.

UM3481 series are available in 1Mbps. All devices also feature integrated IEC ESD protection, eliminating the need for external system-level protection components. Extended ±15V input common-mode range ensures reliable data communication over longer cable run lengths and/or in the presence of large ground loop voltages. Enhanced 250mV receiver hysteresis provides high noise rejection. In addition, the receiver fail-safe feature provides a logic high when the bus inputs are open or shorted together.

UM3481 series are available in SOP8, MSOP8, DFN8 3.0×3.0 packages. All devices are designed for space-constrained applications.
 

- Meets or exceeds the requirements of the TIA/EIA-485A standards 
- 3.0V to 5.5V supply voltage
- Differential output exceeds 2.1 V for PROFIBUS compatibility with 5V supply
- Bus I/O protection :
    -±18V DC bus fault
    -±8kV Human body model (HBM)
    -±9kV IEC 61000-4-2 contact discharge
- Half-duplex device available in 1Mbps
- Extended operational common-mode range: ±15V
- Glitch-free power-up/down for hot plug-in capability
- Undervoltage lockout
- Extended ambient temperature range: -40°C to 125°C
- Enhanced receiver hysteresis for noise immunity
- Open, short, and idle bus failsafe
- Thermal shutdown
- 1/8 unit load (up to 256 bus nodes)
  

   

 

Part Number	Operating Temperature	Mark Code	Package Type	Shipping Qty
UM3481EESA	-40°C to +125°C	UM3481EESA	SOP8	3000pcs/13 Inch Tape & Reel