Home  Back
Last update: 10 September 2005

IC numbers:MC146818A, DS1287
IC function:Real Time Clock plus RAM

Component documentation
IC numberManufacturerDocumentation
MC146818AMotorolaNot available
DS1287Dallas Semiconductor (now Maxim) DS1287 Datasheet (PDF, local), DS12887 Web site, DS12887 Datasheet (PDF)

Component versions
IC numberPackageBattery and quartz includedCBM part numberCBM part description
MC146818A24-pin DIPNo390305-01MC146818/A
MC146818A24-pin DIPNo380259-01IC, M146818A RTC/CMOS RAM
DS128724-pin DIPYes390417-01DS1287 RTS/CMOS RAM

Positions
DevicePositionComponentsPackage
A2286 sandwich boardU52DS1287, MC146818ADIP
PC30-IIIU201DS1287, MC146818ADIP
PC40-IIIU201MC146818ADIP

Pinout MC146818A
PinTypeName
1InputMOT
2InputOSC1
3OutputOSC2
4..11I/OAD0..AD7
12PowerVSS
13InputCS_
14InputAS
15InputR/W_
16InputSTBY_
17InputDS
18InputRESET_
19OutputIRQ_
20InputCKFS
21OutputCKOUT
22InputPS
23OutputSQW
24PowerVDD

Pinout DS1287
PinTypeName
1InputMOT
2..3N/CNC
4..11I/OAD0..AD7
12PowerGND
13InputCS_
14InputAS
15InputR/W_
16N/CNC
17InputDS
18InputRESET_
19OutputIRQ_
20..22N/CNC
23OutputSQW
24PowerVCC

Copyright © 2004-2005 Ronald van Dijk - All rights reserved