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