S8423

Contents Features .............................................................. 1 Applications ......................................................... 1 Selection Guide ................................................... 1 Block Diagram ..................................................... 2 Pin Assignment ................................................... 2 Absolute Maximum Ratings ................................. 2 Electrical Characteristics ..................................... 3 Test Circuits ........................................................ 6 Operation Timing Charts (S-8423AFS)................ 7 Operation............................................................. 8 Transient Response ............................................ 10 Standard Circuit................................................... 19 Application Circuits .............................................. 20 Characteristics..................................................... 23 Dimensions, Taping............................................. 35 Rev.2.0 BATTERY BACKUP IC S-8423 Series The S-8423 Series is a CMOS IC designed for use in the switching circuits of main and backup power supplies of 3-V or 5-V operation microcomputers. It consists of two voltage regulators, three voltage detectors, a switchover circuit, and a control circuit. In addition to being able to switch from primary to backup power supplies, the S8423 Series has three types of voltage detection output signal corresponding to...