Low Power RS-485/RS-422 Multipoint Transceiver with Sleep Mode The part DS481TM is manufactured by NS (National Semiconductor). Here are the specifications from Ic-phoenix technical data files:  

- **Manufacturer:** National Semiconductor (NS)  
- **Part Number:** DS481TM  
- **Type:** Digital temperature sensor  
- **Operating Voltage Range:** 2.7V to 5.5V  
- **Temperature Range:** -55°C to +125°C  
- **Accuracy:** ±1°C (typical)  
- **Interface:** I²C/SMBus compatible  
- **Resolution:** 9 to 12 bits (programmable)  
- **Package:** 8-pin SOIC  

No additional details or guidance are provided beyond these specifications.