BQ4802LYPWR Clock Timer ICS Real Time Clock Parallel RTC

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 Mode
• 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 Mode
• Programmable Periodic Interrupt
• Battery-Low Warning
• 28-pin SOIC, TSSOP, and SNAPHAT Package Options

APPLICATIONS

• Telecommunications Base Stations D Servers
• Handheld Data Collection Equipment D Medical Equipment
• Handheld Instrumentation D Test Equipment

DESCRIPTION

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 super- visor, 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.