DS1345AB Overview
Key Specifications
Package: Module
Pins: 34
Operating Voltage: 5 V
Max Voltage (typical range): 5.25 V
Description
The DS1345 1024k NV SRAMs are 1,048,576-bit, fully static, NV SRAMs organized as 131,072 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry which constantly monitors VCC for an out-of-tolerance condition.
Key Features
- 10 years minimum data retention in the absence of external power
- Data is automatically protected during power loss
- Power supply monitor resets processor when VCC power loss occurs and holds processor in reset during VCC ramp-up
- Battery monitor checks remaining capacity daily
- Read and write access times of 70ns
- Unlimited write cycle endurance
- Typical standby current 50µA
- Upgrade for 128k x 8 SRAM, EEPROM or Flash
- Lithium battery is electrically disconnected to retain freshness until power is applied for the first time
- Full ±10% VCC operating range (DS1345Y) or optional ±5% VCC operating range (DS1345AB)
