BQ4847 Datasheet

RTC Module With CPU Supervisor


General Description
The bq4847 Real-Time Clock Module is a low-power microprocessor peripheral that integrates a time of-day clock, a100-year calendar, a CPU supervisor, a battery, and a crystal in a 28-pin DIP module. The part is ideal for fax machines, copiers, in dustrial control systems, point-of-sale terminals, data loggers, and computers.

➤Real-Time Clock counts seconds through years in BCD format
➤Integrated battery and crystal
➤On-chip battery-backup switch over circuit with nonvolatile control for an external SRAM
➤130mAh battery capacity
➤±1 minute per month clock accuracy
➤Less than 500nA of clock operation current in backup mode
➤Microprocessor reset valid to VCC=VSS
➤Independent watchdog timer with a programmable time-out period
➤Power-fail interrupt warning
➤Programmable clock alarm interrupt active in battery-backup mode
➤Programmable periodic interrupt
➤Battery-low warning



Manufacturer information


Texas Instruments introduction - Texas Instruments Incorporated (TI) is a global semiconductor design and manufacturing company that develops analog ICs and embedded processors. By employing the world's brightest minds, TI creates innovations that shape the future of technology. TI is helping more than 100,000 customers transform the future, today.

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