VT82885, VT82885N, VT82885P Selling Leads, Datasheet
MFG:VOLTERRA Package Cooled:2500 D/C:01+
VT82885, VT82885N, VT82885P Datasheet download
Part Number: VT82885
MFG: VOLTERRA
Package Cooled: 2500
D/C: 01+
VT82885, VT82885N, VT82885P
- Table of contents:
Info of VT82885
Info of VT82885N
Info of VT82885P
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About VT82885
PDF/DataSheet Download
Datasheet: VT82885
File Size: 74090 KB
Manufacturer: ETC [ETC]
Download : Click here to Download
About VT800
PDF/DataSheet Download
Datasheet: VT800
File Size: 1270598 KB
Manufacturer: PERKINELMER [PerkinElmer Optoelectronics]
Download : Click here to Download
About VT800
PDF/DataSheet Download
Datasheet: VT800
File Size: 1270598 KB
Manufacturer: PERKINELMER [PerkinElmer Optoelectronics]
Download : Click here to Download
VT82885 General Description
The VT82885 Real Time Clock is designed to be a direct replacement for the DS12885. The VT82885 is identical in form, fit and function to the DS12885. It has 114 bytes of general purpose RAM. Access to this RAM space is determined by the logic level presented on AD6 during the address portion of an access cycle. An external crystal and battery are the only components required to maintain time-of-day and memory status in the absence of power. A complete description of operating conditions, electrical characteristics, bus timing and pin descriptions follows.
VT82885 Maximum Ratings
VOLTAGE ON ANY PIN RELATIVE TO GROUND................... -0.3V TO +7.0V
OPERATING TEMPERATURE ..................................................0°C TO 70°C
STORAGE TEMPERATURE ................................................-40°C TO +70°C
SOLDERING TEMPERATURE ................................260°C FOR 10 SECONDS
*This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
VT82885 Features
· Drop-in replacement for IBM AT computer clock/calendar.
· Pin configuration closely matches the DS12887, DS12885and DS12885Q
· 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 interrpts 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
· Optional 28-pin PLCC surface mount package
· Pin configuration closely matches the DS12887, DS12885and DS12885Q
· 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 interrpts 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
· Optional 28-pin PLCC surface mount package
VT82885 Connection Diagram
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