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DS1251P

Description
4096k NV SRAM with Phantom Clock
File Size530KB,20 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Compare View All

DS1251P Overview

4096k NV SRAM with Phantom Clock

19-6079; Rev 11/11
4096K NV SRAM with Phantom Clock
FEATURES
Real-Time Clock Keeps Track of Hundredths
Of Seconds, Minutes, Hours, Days, Date of
the Month, Months, and Years
512K 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
Over 10 Years of Data Retention in the
Absence of Power
Full 10% Operating Range
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
– Upward Compatible with the DS1248
PowerCap Module Board Only
Surface Mountable Package for Direct
Connection to PowerCap Containing
Battery and Crystal
Replaceable Battery (PowerCap)
Pin-for-Pin Compatible with Other
Densities of DS124xP Phantom Clocks
Underwriters Laboratories (UL) Recognized
(www.maxim-ic.com/qa/info/ul/)
DS1251/DS1251P
PIN CONFIGURATIONS
TOP VIEW
A18/RST
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
1
2
DS1251
3
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
V
CC
A15
A17
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
Encapsulated Package
740-Mil Flush
RST
A15
A16
N.C.
V
CC
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
DS1251P
X1
GND V
BAT
X2
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
A18
A17
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
PowerCap Module Board
(Uses DS9034PCX+ PowerCap)
1 of 20

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