RTC W NVSRAM Control, Watchdog Timer, uP Reset Interrupts Battery Low Warning Part BQ4847MT is manufactured by BENCHMARQ. It is a real-time clock (RTC) integrated circuit with the following specifications:  

- **Supply Voltage Range:** 2.7V to 5.5V  
- **Timekeeping Current:** 500nA (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Interface:** I²C (2-wire serial)  
- **Package Type:** 8-pin SOIC  
- **Features:** Battery backup, automatic leap-year compensation, programmable square-wave output  

This information is based on the manufacturer's datasheet.