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VT82887

Features: · Drop-in replacement for IBM AT computer clock/calendar.· Pin configuration closely matches the DS12887· Totally nonvolatile with over 10 years of operation in the absence of power· Self-contained subsystem includes lithium, quartz and support circuitry· Counts seconds, minutes, hours, ...

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SeekIC No. : 004543851 Detail

VT82887: Features: · Drop-in replacement for IBM AT computer clock/calendar.· Pin configuration closely matches the DS12887· Totally nonvolatile with over 10 years of operation in the absence of power· Self-...

VT82887 Data Sheet

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Part Number:
VT82887
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/4/18

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Product Details

Description



Features:

· Drop-in replacement for IBM AT computer clock/calendar.
· Pin configuration closely matches the DS12887
· Totally nonvolatile with over 10 years of operation in the absence of power
· Self-contained subsystem includes lithium, quartz and support circuitry
· Counts seconds, minutes, hours, days, day of the week, date, month and year with leap year compensation
· Binary or BCD representation of time, calendar and alarm
· 12- or 24-hour clock with AM and PM in 12- hour mode
· Daylight Savings Time option
· Intel bus timing
· Multiplex bus for pin efficiency
· Interfaced with software as 128 RAM locations
- 14 bytes of clock and control registers
- 114 bytes of general purpose RAM
· Programmable square wave output signal
· Bus-compatible interrupt signals (IRQ#)
· Three interrupts are separately softwaremaskable and testable
- Times-of-day alarm once/second to once/day
- Periodic rates from 122 ms to 500 ms
- End of clock update cycle


Pinout

Connection Diagram


Specifications

VOLTAGE ON ANY PIN RELATIVE TO GROUND -0.3V TO +7.0V
OPERATING TEMPERATURE                              0TO 70
STORAGE TEMPERATURE                               -40 TO +70
SOLDERING TEMPERATURE                            260 FOR 10 SECONDS


Description

The VT82887 Real Time Clock is designed to be a direct replacement for the DS12887.  The VT82887 is identical in form, fit and function to the DS12887. It has 114 bytes of general purpose RAM. Access to this RAM space is




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