DS1688 datasheet(1/5 Pages) DALLAS

부품명	DS1688

상세설명	3 Volt/5 Volt Serialized Real Time Clock with NV RAM Control

PDF	5 Pages

Scroll/Zoom	100%

제조업체	DALLAS [Dallas Semiconductor]

홈페이지	https://www.maximintegrated.com/en.html

Logo

1 / 5 page

DS1688/DS1691

3 Volt/5 Volt Serialized Real Time Clock

with NV RAM Control

DS1688/DS1691

030598 1/5

FEATURES

Incorporates industry standard DS1287 PC clock plus

enhanced features:

• +3 or +5 volt operation

• 64–bit Silicon serial number

• 64–bit customer specific ROM or additional serial

number available

• Power control circuitry supports system power on

from date/time alarm or key closure

• Automatic battery backup and write protection to

external SRAM

• Crystal select bit allows RTC to operate with 6 pF or

12.5 pF crystal

• 114 bytes user NVRAM

• Auxiliary battery input

• RAM clear input

• Century register

• 32 KHz output for power management

• 32–bit V

CC powered elapsed time counter

• 32–bit V

BAT powered elapsed time counter

• 16–bit power cycle counter

• Compatible with existing BIOS for original DS1287

functions

• Available as chip (DS1688) or stand–alone module

with embedded battery and crystal (DS1691)

• Timekeepingalgorithmincludesleapyearcompensa-

tion valid up to 2100

ORDERING INFORMATION

PART #

DESCRIPTION

DS1688

RTC Chip, 28–pin DIP

DS1688S

RTC Chip, 28–pin SOIC

DS1691

RTC Module; 28–pin DIP

PIN ASSIGNMENT

VBAUX

X1

X2

RCLR

AD0

AD1

AD2

AD3

AD4

AD5

AD6

AD7

PWR

GND

CEI

CEO

VCCI

VCCO

SQW

VBAT

IRQ

PSEL

RD

GND

WR

ALE

CS

KS

VBAUX

X1

X2

RCLR

AD0

AD1

AD2

AD3

AD4

AD5

AD6

AD7

PWR

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

CEI

CEO

VCCI

VCCO

SQW

VBAT

IRQ

PSEL

RD

GND

WR

ALE

CS

KS

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

DS1688 28–PIN DIP

(600 MIL)

DS1688S 28–PIN SOIC

(330 MIL)

CEI

CEO

VCCI

VCCO

SQW

NC

IRQ

PSEL

RD

NC

WR

ALE

CS

KS

VBAUX

NC

RCLR

AD0

AD1

AD2

AD3

AD4

AD5

AD6

AD7

PWR

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

DS1691 28–PIN ENCAPSU-

LATED PACKAGE (740 MIL)

PIN DESCRIPTION

X1

– Crystal Input

X2

– Crystal Output

RCLR

– RAM Clear Input

AD0-AD7

– Mux’ed Address/Data Bus

PWR

– Power–on Interrupt Output

KS

– Kickstart Input

CS

– RTC Chip Select Input

ALE

– RTC Address Strobe

WR

– RTC Write Data Strobe

RD

– RTC Read Data Strobe

VCCO

– RAM Power Supply Output

유사한 부품 번호 - DS1688

제조업체	부품명	데이터시트	상세설명
Dallas Semiconductor	DS1688	395Kb / 6P	3V/5V Serialized Real-Time Clocks with NV RAM Control
Maxim Integrated Produc...	DS1688	99Kb / 3P	3V/5V Serialized Real-Time Clocks with NV RAM Control REV: 112205
Dallas Semiconductor	DS1688S	395Kb / 6P	3V/5V Serialized Real-Time Clocks with NV RAM Control
Maxim Integrated Produc...	DS1688S	99Kb / 3P	3V/5V Serialized Real-Time Clocks with NV RAM Control REV: 112205
Dallas Semiconductor	DS1688S+	395Kb / 6P	3V/5V Serialized Real-Time Clocks with NV RAM Control

More results

유사한 설명 - DS1688

제조업체	부품명	데이터시트	상세설명
RICOH electronics devic...	RP5C01A	124Kb / 10P	REAL-TIME CLOCK WITH INTERNAL RAM
Dallas Semiconductor	DS14285	303Kb / 25P	Real Time Clock with NV RAM Control
	DS1689	321Kb / 32P	3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control
	DS1558	492Kb / 18P	Watchdog Clock with NV RAM Control
Maxim Integrated Produc...	DS1558	320Kb / 18P	Watchdog Clock with NV RAM Control REV: 071305
Dallas Semiconductor	DS1688	395Kb / 6P	3V/5V Serialized Real-Time Clocks with NV RAM Control
	DS1689	593Kb / 36P	3V/5V Serialized Real-Time Clocks with NV RAM Control
	DS14285	481Kb / 26P	Real-Time Clock with NV RAM
Maxim Integrated Produc...	DS1688	99Kb / 3P	3V/5V Serialized Real-Time Clocks with NV RAM Control REV: 112205
Maxim Integrated Produc...	DS1689	599Kb / 36P	3V/5V Serialized Real-Time Clocks with NV RAM Control REV: 112105

More results

DS1688 데이터시트(PDF) 1 Page - Dallas Semiconductor

DS1688 데이터시트(HTML) 1 Page - Dallas Semiconductor

유사한 부품 번호 - DS1688

유사한 설명 - DS1688

Html Pages

1 2 3 4 5

데이터시트 다운로드

링크 URL