V3022- Real Time Clocks - Modules

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

General Description

The V3022 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 flag in the V3022, internal time update cycles are invisible to the user’s software. Time data can be read from the V3022 in 12 or 24 hour data formats. An external signal puts the V3022 in standby mode. Even in standby, the V3022 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.

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
  • 50ns access time with 50pF load capacitance
  • Standby on power down typically 1.2µA
  • Wide voltage range, 2.0V to 5.5V
  • Universal interface compatible with both Intel and Motorola
  • Simple 8 bit interface with no delays or busy flags
  • Power fail input disables during power up/down of reset
  • Bus can be tri-state in power fail mode
  • 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: 10ms, 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
V3022 Data Sheet967.51 KB