Click to expand full text
MITSUMI
Battery Backup IC
Battery Backup IC
1. Background of Development Around 1985 when began the sales of IC for microcomputer peripheral equipment and system reset IC, a set manufacture inquired of us about IC for control of memory. It was a good change for us to decide a joint development of general purpose IC. This resulted in the development of PST531 and PST532. In 1989 they were improved into the backup IC series dedicated to cards, games (popular-priced) and to 1-chip microcomputers. Our IC series now includes low current consumption type products.
2. What is Battery Backup IC? Such IC memories as S-RAM and D-RAM all volatilize when power supply is cut off.