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DS1501W+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
19 of 22
WE only when register 13h is being accessed (Figure 4). The address pointer wraps around after the last address
is accessed.
ORDERING INFORMATION (continued)
PART VOLTAGE (V) TEMP RANGE PIN-PACKAGE TOP MARK*
DS1501WN+ 3.3
-40C to +85C
28 DIP (0.600) DS1501WN
DS1501WZ+ 3.3
0C to +70C
28 SO (0.300) DS1501WZ
DS1501WZN+ 3.3
-40C to +85C
28 SO (0.300) DS1501WZN
DS1501WZN+T&R 3.3
-40C to +85C
28 SO (0.300)/Tape & Reel DS1501WZN
DS1501WZ+T&R 3.3
0C to +70C
28 SO (0.300)/Tape & Reel DS1501WZ
DS1501Y+ 5.0
0C to +70C
28 DIP (0.600) DS1501Y
DS1501YE+ 5.0
0C to +70C
28 TSOP DS1501YE
DS1501YEN+ 5.0
-40C to +85C
28 TSOP DS1501YEN
DS1501YEN+T&R 5.0
-40C to +85C
28 TSOP/Tape & Reel DS1501YEN
DS1501YE+T&R 5.0
0C to +70C
28 TSOP/Tape & Reel DS1501YE
DS1501YN+ 5.0
-40C to +85C
28 DIP (0.600) DS1501YN
DS1501YZ+ 5.0
0C to +70C
28 SO (0.300) DS1501YZ
DS1501YZN+ 5.0
-40C to +85C
28 SO (0.300) DS1501YZN
DS1501YZN+T&R 5.0
-40C to +85C
28 SO (0.300)/Tape & Reel DS1501YZN
DS1501YZ+T&R 5.0
0C to +70C
28 SO (0.300)/Tape & Reel DS1501YZ
DS1511W+ 3.3
0C to +70C
28 EDIP (0.720) DS1511W
DS1511Y+ 5.0
0C to +70C
28 EDIP (0.720) DS1511Y
+Denotes a lead(Pb)-free/RoHS-compliant package.
* A “+” anywhere on the top mark denotes a lead(Pb)-free package. An N or IND denotes an industrial temperature device.
DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
20 of 22
PIN CONFIGURATIONS
EDIP
N.C.
N.C.
A
4
A
3
A
2
A
1
A
0
DQ0
DQ1
DQ2
GND
P
WR
R
ST
I
RQ
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SQW
N.C.
DQ7
DQ6
DQ5
DQ4
DQ3
C
E
O
E
K
S
W
E
V
BAUX
N.C.
CC
V
Maxim
DS1511
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
10
11
12
13
14
O
E
A
3
SQW
KS
V
BAUX
V
BAT
W
E
V
CC
X1
X2
A
4
I
RQ
R
ST
P
WR
GND
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
A
0
A
1
A
2
GND
DQ7
C
E
TSOP
Maxim
DS1501
TOP VIEW
Maxim
DS1501
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SQW
GND
DQ7
DQ6
DQ5
DQ4
DQ3
W
E
K
S
OE
C
E
V
CC
V
BAUX
V
BAT
X1
X2
A
4
A
3
A
2
A
1
A
0
DQ0
DQ1
DQ2
GND
P
WR
R
ST
I
RQ
DIP, SO
DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
21 of 22
TYPICAL OPERATING CIRCUITS
DS1501
CPU
V
CC
V
CC
V
CC
I
RQ
RST
GND
X2 X1
V
CC
RPU
CRYSTAL
SQW
V
BAT
DQ0–DQ7
R
ST
W
E
O
E
V
BAUX
K
S
P
WR
C
E
A
0–A4
IRQ
GND
DS1511
CPU
V
CC
V
CC
V
CC
I
RQ
RST
GND
V
CC
RPU
SQW
DQ0–DQ7
R
ST
W
E
O
E
V
BAU
X
K
S
P
WR
C
E
A
0–A4
IRQ
GND
PACKAGE INFORMATION
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
PACKAGE TYPE DOCUMENT NUMBER
28-pin DIP (600 mils) 21-0044
28-pin SO (300 mils) 21-0042
28-pin TSOP (8mm x 13.4mm) 21-0273
28-pin EDIP (720 mils) 21-0241
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

DS1501W+

Mfr. #:
Buy DS1501W+
Manufacturer:
Maxim Integrated
Description:
Real Time Clock Y2K-Compliant Watchdog
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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