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RQ48o2 - PARALLEL REAL-TIME CLOCK WITH CPU SUPERYISOR AND EXTERNAL SRAM NONYOLATILE MEMORY BACKUP

FEATURES

•    Real-Time Clock Counts Seconds Through Centuries in BCD Format

-    bq4802Y: 5-V Operation

-    bq4802LY: 3.3-V Operation

•    On-Chip Battery-Backup Switchover Circuit With Nonvolatile Control for External SRAM

•    Less Than 500 nA of Clock Operation Current in Backup Modę

•    Microprocessor Reset With Push-Button Override

•    Independent Watchdog Timer With Programmable Time-Out Period

•    Power-Fail Interrupt Warning

•    Programmable Clock Alarm Interrupt Active in Battery-Backup Modę

•    Programmable Periodic Interrupt

•    Battery-Low Warning

•    28-pin SOIC, TSSOP, and SNAPHAT Package Options

APPLICATIONS

•    Telecommunications Base Stations

•    Servers

•    Handheld Data Collection Equipment

•    Medical Equipment

•    Handheld Instrumentation

•    Test Equipment