FEATURES
D Real-Time Clock Counts Seconds Through Centuries in BCD Format – bq4802Y: 5-V Operation – bq4802LY: 3.3-V Operation D On-Chip Battery-Backup Switchover Circuit With Nonvolatile Control for External SRAM D Less Than 500 nA of Clock Operation Current in Backup Mode D Microprocessor Reset With Push-Button Override D Independent Watchdog Timer With Programmable Time-Out Period D Power-Fail Interrupt Warning D Programmable Clock Alarm Interrupt Active in Battery-Backup Mode D Programmable Periodic Interrupt D Battery-Low Warning D 28-pin SOIC, TSSOP, and SNAPHAT Package Options TYPICAL APPLICATION 5 kΩ APPLICATIONS
D Telecommunications Base Stations D Servers D Handheld Data Collection Equipment D Medical Equipment D Handheld Instrumentation D Test Equipment DESCRIPTION
The bq4802Y/bq4802LY real-time clock is a low-power microprocessor peripheral that integrates a time-ofday 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.
Texas Instruments
