Service Manuals, User Guides, Schematic Diagrams or docs for : Keithley 2001 ds Digital DS1243-DS1243Y
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19-6076; Rev 11/11
DS1243Y
64K NV SRAM with Phantom Clock
FEATURES PIN CONFIGURATION
Real-Time Clock Keeps Track of Hundredths TOP VIEW
of Seconds, Seconds, Minutes, Hours, Days,
1 28 VCC
Date of the Month, Months, and Years RST
27
A12 2 WE
8K x 8 NV SRAM Directly Replaces A7 3 DS1243Y 26 N.C.
Volatile Static RAM or EEPROM A6 4 25 A8
A5 5 24 A9
Embedded Lithium Energy Cell Maintains A4 6 23 A11
Calendar Operation and Retains RAM Data A3 7 22 OE
A2 8 21 A10
Watch Function is Transparent to RAM A1 9 20 CE
Operation A0 10 19 DQ7
Automatic Leap Year Compensation Valid DQ0 11
12
18
17
DQ6
DQ1 DQ5
Up to 2100 13 16
DQ2 DQ4
Lithium Energy Source is Electrically GND 14 15 DQ3
Disconnected to Retain Freshness Until
Power is Applied for the First Time Encapsulated Package
(720-Mil Extended)
Standard 28-Pin JEDEC Pinout
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