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DS1501/DS1511

Y2KC Watchdog Real Time Clock

www.dalsemi.com

FEATURES

BCD coded century, year, month, date, day,

hours, minutes, and seconds with automatic

leap year compensation valid up to the year

2100

Programmable watchdog timer and RTC alarm

Century register; Y2K-compliant RTC

+3.3 or +5V operation

Precision power-on reset

Power control circuitry supports system

power-on from date/day/time alarm or key

closure/modem detect signal

256 bytes user NV SRAM

Burst mode for reading/writing successive

addresses in NV SRAM

Auxiliary battery input

Accuracy of DS1511 is better than

鹵=1

min./month @ 25擄C

Day of week/date alarm register

Crystal select bit allows RTC to operate with

6 pF or 12.5 pF crystal

Battery voltage level indicator flags

Available as chip (DS1501) or standalone

module with embedded battery and crystal

(DS1511)

Optional industrial temperature range -40擄C to

+85擄C (DS1501 only)

PIN ASSIGNMENT

PWR

X1

X2

RST

IRQ

A4

A3

A2

A1

A0

DQ0

DQ1

DQ2

GND

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

V

CC

WE

V

BAUX

V

BAT

KS

SQW

OE

GND

CE

DQ7

DQ6

DQ5

DQ4

DQ3

28-Pin DIP, 28-Pin

PWR

NC

NC

RST

IRQ

A4

A3

A2

A1

A0

DQ0

DQ1

DQ2

GND

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

V

CC

WE

V

BAUX

NC

KS

SQW

OE

NC

CE

DQ7

DQ6

DQ5

DQ4

DQ3

28-Pin Encapsulated Package

(720-mil FLUSH)

OE

SQW

KS

V

BAT

V

BAUX

WE

V

CC

PWR

X1

X2

RST

IRQ

A4

A3

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

GND

CE

DQ7

DQ6

DQ5

DQ4

DQ3

GND

DQ2

DQ1

DQ0

A0

A1

A2

ORDERING INFORMATION

DS1501XXX

blank

N

commercial temp range

industrial temp range

Blank 28-pin DIP

E

28-pin TSOP

S

28-pin SOIC

Y

W

DS1511X

5V operation

3.3V operation

28-Pin TSOP

Package Dimension Information can be found at:

http://www.dalsemi.com/datasheets/mechdwg.html

Dip Module

Y

W

5V operation

3.3V operation

1 of 30

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DS1501Y相關(guān)型號(hào)PDF文件下載

• 型號(hào)
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  廠(chǎng)商
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• DS1553
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• DS1556
  英文版
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  DS1556
• DS1557
  英文版
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  DS1557
• DS1558
  英文版
  Watchdog Clock with NV RAM Control
  
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• DS1558
  英文版
  Watchdog Clocks with NV RAM Control
  
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• DS1589
  英文版
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• DS1589
  英文版
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