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DS17885/DS17887

3 Volt/5 Volt Real Time Clock

FEATURES

Incorporates industry standard DS1287 PC clock plus

enhanced features:

PIN ASSIGNMENT

PWR

X1

X2

AD0

AD1

AD2

AD3

AD4

AD5

AD6

AD7

GND

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

V

CC

SQW

V

BAUX

RCLR

V

BAT

IRQ

KS

RD

GND

WR

ALE

CS

鈥?/div>

Y2K Compliant

鈥?/div>

+3

or +5 volt operation

鈥?/div>

SMI recovery stack

鈥?/div>

64鈥揵it silicon serial number

鈥?/div>

Power

control circuitry supports system power on

from date/time alarm or key closure

鈥?/div>

32 KHz output on power鈥搖p

鈥?/div>

Crystal select bit allows RTC to operate with 6 pF or

12.5 pF crystal

PWR

NC

AD0

AD1

AD2

AD3

AD4

AD5

AD6

AD7

GND

DS17885 24鈥揚(yáng)IN DIP

DS17885S 24鈥揚(yáng)IN SOIC

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

V

CC

SQW

V

BAUX

RCLR

NC

IRQ

KS

RD

NC

WR

ALE

CS

鈥?/div>

114 bytes user NVRAM

鈥?/div>

Auxiliary battery input

鈥?/div>

8K bytes additional NVRAM

鈥?/div>

RAM clear input

鈥?/div>

Century register

鈥?/div>

Date alarm register

鈥?/div>

Compatible with

functions

existing BIOS for original DS1287

IRQ

V

BAT

RCLR

V

BAUX

SQW

V

CC

V

CC

PWR

X1

X2

NC

AD0

AD1

AD2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

DS17887 24鈥揚(yáng)IN ENCAPSULATED PACKAGE

28

27

26

25

24

23

22

21

20

19

18

17

16

15

KS

RD

GND

WR

ALE

CS

GND

AD7

AD6

NC

AD5

AD4

AD3

鈥?/div>

Available as chip (DS17885) or standalone module

with embedded battery and crystal (DS17887)

鈥?/div>

Timekeeping algorithm includes leap year compensa-

tion valid up to 2100

ORDERING INFORMATION

PART #

DS17885鈥揦

DS17885E鈥揦

DS17885S鈥揦

DS17887鈥揦

DESCRIPTION

RTC Chip; 24鈥損in DIP

RTC Chip; 28鈥損in TSOP

RTC Chip; 24鈥損in SOIC

RTC Module; 24鈥損in DIP

鈥?

+3 volt device

+5 volt device

DS17885E 28鈥揚(yáng)IN TSOP

ECopyright

1995 by Dallas Semiconductor Corporation.

patents and other intellectual property rights, please refer to

Dallas Semiconductor data books.

010898 1/32

標(biāo)準(zhǔn)包裝
14
類(lèi)別
集成電路 (IC)
家庭
時(shí)鐘/計(jì)時(shí) - 實(shí)時(shí)時(shí)鐘
系列
-
類(lèi)型
時(shí)鐘/日歷
特點(diǎn)
警報(bào)器，夏令時(shí)，閏年，NVSRAM，方波輸出
存儲(chǔ)容量
8KB
時(shí)間格式
HH:MM:SS（12/24 小時(shí)）
數(shù)據(jù)格式
YY-MM-DD-dd
接口
并聯(lián)
電源電壓
2.7 V ~ 3.7 V
電壓 - 電源，電池
2.5 V ~ 3.7 V
工作溫度
0°C ~ 70°C
安裝類(lèi)型
通孔
封裝/外殼
24-DIP 模塊（0.600"，15.24mm）
供應(yīng)商設(shè)備封裝
24-EDIP
包裝
管件

DS17887-3相關(guān)型號(hào)PDF文件下載

型號(hào)

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描述

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