Service Manuals, User Guides, Schematic Diagrams or docs for : Keithley 2001 ds Digital DS1248-DS1248P
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19-6078; Rev 11/11
DS1248/DS1248P
1024K NV SRAM with Phantom Clock
FEATURES
Real-Time Clock (RTC) Keeps Track of PIN CONFIGURATIONS
Hundredths of Seconds, Minutes, Hours,
TOP VIEW
Days, Date of the Month, Months, and Years
RST VCC
128K x 8 NV SRAM Directly Replaces 1 32
A16 2 31 A15
Volatile Static RAM or EEPROM A14 3 DS1248 30 N.C.
A12 4 29 WE
Embedded Lithium Energy Cell Maintains A13
A7 5 28
Calendar Operation and Retains RAM Data A6 6 27 A8
A5 7 26 A9
Watch Function is Transparent to RAM A4 8 25 A11
Operation A3 9 24 OE
A2 10 23 A10
Automatic Leap Year Compensation Valid A1 11 22 CE
Up to 2100 A0 12 21 DQ7
DQ0 13 20 DQ6
Full 10% Operating Range
DQ1 14 19 DQ5
Over 10 Years of Data Retention in the DQ2 15 18 DQ4
Absence of Power GND 16 17 DQ3
Lithium Energy Source is Electrically Encapsulated DIP
Disconnected to Retain Freshness Until (740-mil Flush)
Power is Applied for the First Time
DIP Module Only
Standard 32-Pin JEDEC Pinout RST 1 34 N.C.
A15 2 DS1248P 33 N.C.
Underwriters Laboratories (UL) Recognized A16 3 32 A14
N.C. 4 31 A13
(www.maxim-ic.com/qa/info/ul/) VCC 5 30 A12
WE 6 29 A11
28 A10
PowerCap Module Board Only OE
CE
7
8 27 A9
DQ7 9 26 A8
Surface Mountable Package for Direct DQ6 10 25 A7
11 24 A6
Connection to PowerCap Containing DQ5
DQ4 12 23 A5
Battery and Crystal DQ3 13
14
22
21
A4
A3
DQ2
Replaceable Battery (PowerCap) DQ1 15 20
19
A2
A1
DQ0 16
Pin-for-Pin Compatible with DS1244P and GND 17 X1 GND VBAT X2 18 A0
DS1251P PowerCap Module Board
(Uses DS9034PCX+ PowerCap)
1 of 19
DS1248/DS1248P 1024K NV SRAM with Phantom Clock
ORDERING INFORMATION
PART TEMP RANGE VCC RANGE PIN-PACKAGE
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