A3024 数据手册 ( 数据表 ) - EM Microelectronic - MARIN SA

   A3000-40-1X
   The A3024 is a low power CMOS real time clock. Standby current is typically 1.2 μA and the access time is 50 ns. The interface is 8 bits with multiplexed address and data bus. Multiplexing of address and data is handled by the input line A/D. There are no busy flags in the A3024, internal time update cycles are invisible to the user’s software. 

FEATUREs
◾ Digital trimming and temperature compensation facilities
◾ Can be synchronized to 50 Hz or nearest s/min
◾ 50 ns access time with 50 pF load capacitance
◾ Standby on power down typically 1.2 μA
◾ Universal interface compatible with both Intel and Motorola
◾ Simple 8 bit interface with no delays or busy flags
◾ 16 bytes of user RAM
◾ Power fail input disables during power up / down or reset
◾ Bus can be tri-state in power fail mode
◾ Wide voltage range, 2.0 V to 5.5 V
◾ 12 or 24 hour data formats
◾ Time to 1/100 of a second
◾ Leap year correction and week number calculation
◾ Alarm and timer interrupts
◾ Programmable interrupts: 10 ms, 100 ms, s or min
◾ Sleep mode capability
◾ Alarm programmable up to one month
◾ Timer measures elapsed time up to 24 hours
◾ Temperature range -40 to +85°C
◾ Packages DIP20 and SO20

APPLICATIONs
◾ Industrial controllers
◾ Alarm systems with periodic wake up
◾ PABX and telephone systems
◾ Point of sale terminals
◾ Automotive electronics