DS1248Y-70 Ver la hoja de datos (PDF) - Maxim Integrated
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DS1248Y-70 Datasheet PDF : 19 Pages
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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
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
32
2
31
3 DS1248 30
4
29
5
28
6
27
7
26
8
25
9
24
10
23
11
22
12
21
13
20
14
19
15
18
16
17
VCC
A15
N.C.
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
Encapsulated DIP
(740-mil Flush)
RST 1
34
A15
2
A16
3
N.C. 4
VCC
WE
5
6
DS1248P
33
32
31
30
29
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
7
8
9
10
11
12
13
14
15
16
17
28
27
26
25
24
23
22
21
20
19
X1 GND VBAT X2 18
N.C.
N.C.
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
PowerCap Module Board
(Uses DS9034PCX+ PowerCap)
1 of 19
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