The S-8254AAVFT-TB-S is a PMIC - Battery Management TSSOP-16 RoHS, manufactured by Seiko. This device is a 16-pin TSSOP (Thin Small-Outline Package) device with RoHS (Restriction of Hazardous Substances) compliance. It integrates functions for Li-Ion, Li-Polymer, and other multi-cell battery packs and has a 4-bit processor and battery measurement functions. The device offers a high precision measurement of charging and discharging voltages, current, and temperatures when combined with an external I/O port and power switches. It can also be used to extend battery cycle life. The S-8254AAVFT-TB-S is ideal for use in cell phones, laptop computers, digital cameras, and other rechargeable battery applications.