资 源 简 介
The bq4802Y/bq4802LY real-TIme clock is a low-power microprocessor peripheral that integrates a TIme-of-day clock, a century-based calendar, and a CPU supervisor, with package opTIons including a 28-pin SOIC, TSSOP, or SNAPHAT that requires the bq48SH-28x6 to complete the two-piece module. The bq4802Y/ bq4802LY is ideal for fax machines, copiers, industrial control systems, point-of-sale terminals, data loggers, and computers.
The bq4802Y/bq4802LY provides direct connecTIons for a 32.768-kHz quartz crystal and a 3-V backup battery. Through the use of the conditional chip enable output (CEOUT) and battery voltage output (VOUT) pins, the bq4802Y/bq4802LY can write-protect and make non- volatile external SRAMs. The backup cell powers the real-time clock and maintains SRAM information the absence of system voltage.
