DS1234
Description
The DS1234 is a CMOS circuit that converts CMOS RAM into nonvolatile memory and adds two software selectable switches.
Key Features
- Converts CMOS static RAMs into nonvolatile memories
- Software-controlled write inhibit
- Software-controlled battery disconnect extends battery life
- Unconditionally write protects when VCC is out of tolerance
- Consumes less than 100 nA of battery current
- Power fail signal can be used to interrupt processor on power failure
- Low forward voltage drop on the VCC switch
- RAM Supply - No Connection CEI - Chip Enable Input WEI - Write Enable Input CEO
- Chip Enable Output to RAM WEO
- Write Enable Output to RAM GND
