V3023- Real Time Clocks - Modules

Very Low Power 8-Bit 32kHz RTC Module (with built-in quartz crystal) with Digital Trimming and User RAM - Ultra-Low Power

General Description

The V3023 is a low power CMOS real time clock with a built-in crystal. Standby current is typically 1.2µA and the access time is 50ns. The interface is 8 bits with multiplexed address and data bus. The input line A/D handles multiplexing of address and data. There are no busy flags in the V3023, internal time update cycles are invisible to the user’s software. Time data can be read from the V3023 in 12 or 24 hour data formats. An external signal puts the V3023 in standby mode. Even in standby, the V3023 pulls the IRQ pin active low on an internal alarm interrupt. Calendar functions include leap year correction and week number calculation. Time precision can be achieved by digital trimming. The V3023 can be synchronized to an external 50Hz signal or to the nearest second or minute.

Solutions

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

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Features

  • Built-in crystal with digital trimming and temperature compensation facilities
  • Can be synchronized to 50Hz or nearest s/min
  • 50ns access time with 50pF load capacitance
  • Standby on power down typically 1.2µA
  • 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 of reset
  • Bus can be tri-state in power fail mode
  • Wide voltage range: 2.0 V to 5.5V
  • 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
  • Package SO28
AttachmentSize
V3023 Data Sheet997.4 KB