DS1251Y Overview
The DS1251Y has a self contained lithium energy source and control circuitry which constantly monitors VCC for an out of tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent garbled data in both the memory and real time clock. The Phantom Clock provides timekeeping information including hundredths of...
DS1251Y Key Features
- Real time clock keeps track of hundredths of seconds
- 512K x 8 NV SRAM directly replaces volatile static
- Embedded lithium energy cell maintains calendar operation and retains RAM data
- Watch function is transparent to RAM operation
- Month and year determine the number of days in each
- Standard 32-pin JEDEC pinout
- Full 10% operating range
- Operating temperature range 0°C to 70°C
- Accuracy is better than ±1 minute/month @ 25°C
- Address Inputs Chip Enable Ground Data In/Data Out Power (+5V) Write Enable Output Enable Reset