PDF預(yù)覽

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38

DS17885/DS17887

3V/5V Real-Time Clock

www.maxim-ic.com

FEATURES

Incorporates industry standard DS1287 PC clock

plus enhanced features:

摟

Y2K compliant

摟

+3V or +5V operation

摟

SMI recovery stack

摟

64-bit silicon serial number

摟

Power-control circuitry supports system

power-on from date/time alarm or key

closure

摟

32kHz output on power-up

摟

Crystal select bit allows RTC to operate with

6pF or 12.5pF crystal

摟

114 bytes user NV RAM

摟

Auxiliary battery input

摟

8kB additional NV RAM

摟

RAM clear input

摟

Century register

摟

Date alarm register

摟

Compatible with existing BIOS for original

DS1287 functions

摟

Available as chip (DS17885) or standalone

module with embedded battery and crystal

(DS17887)

摟

Timekeeping algorithm includes leap-year

compensation valid up to 2100

摟

Underwriters Laboratory (UL) recognized

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

VCC

SQW

VBAUX

RCLR

VBAT

IRQ

KS

RD

GND

WR

ALE

CS

DS17885 24-Pin DIP

DS17885S 24-Pin SO

PWR

NC

NC

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

VCC

SQW

VBAUX

RCLR

NC

IRQ

KS

RD

NC

WR

ALE

CS

DS17887 24-Pin

Encapsulated Package

TYPICAL OPERATING CIRCUIT

IRQ

VBAT

RCLR

VBAUX

SQW

VCC

VCC

PWR

X1

X2

NC

ADO

AD1

AD2

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

KS

RD

GND

WR

ALE

CS

GND

GND

AD7

AD6

NC

AD5

AD4

AD3

DS17885E 28-Pin TSOP

1 of 38

050802

next

DS17885EN-5相關(guān)型號(hào)PDF文件下載

• 型號(hào)
  版本
  描述
  廠商
  下載
• DS17
  英文版
  Rectifier Diode Avalanche Diode
  
  DS17
• DS1705
  英文版
  3.3 and 5.0 Volt MicroMonitor
  
  DS1705
• DS1705
  英文版
  3.3V及5.0V MicroMonitor
  
  DS1705
• DS1706
  英文版
  3.3 and 5.0 Volt MicroMonitor
  
  DS1706
• DS1706
  英文版
  3.3V及5.0V MicroMonitor
  
  DS1706
• DS1707
  英文版
  3.3 and 5.0 Volt MicroMonitor
  
  DS1707
• DS1707
  英文版
  3.3V及5.0V MicroMonitor
  
  DS1707
• DS1708
  英文版
  3.3 and 5.0 Volt MicroMonitor
  
  DS1708
• DS1708
  英文版
  3.3V及5.0V MicroMonitor
  
  DS1708
• DS1710
  英文版
  Partitioned NV Controller
  
  DS1710
• DS1720
  英文版
  Econo-Digital Thermometer and Thermostat
  
  DS1720
• DS1721
  英文版
  2-Wire Digital Thermometer and Thermostat
  
  DS1721
• DS1722
  英文版
  Digital Thermometer with SPI/3-Wire Interface
  
  DS1722
• DS1724
  英文版
  Programmable Analog/Digital Thermometer(可編程模擬/數(shù)字溫度...
  Dallas Semicond...
  DS1724
• DS1726
  英文版
  High-Precision 3-Wire Digital Thermometer and Thermostat
  
  DS1726
• DS1726
  英文版
  High-Precision 3-Wire Digital Thermometer and Thermostat
  
  DS1726
• DS1731
  英文版
  High-Precision Digital Thermometer and Thermostat
  
  DS1731
• DS1731
  英文版
  High-Precision Digital Thermometer and Thermostat
  
  DS1731
• DS1742
  英文版
  Y2KC Nonvolatile Timekeeping RAM
  
  DS1742
• DS1743
  英文版
  Y2KC Nonvolatile Timekeeping RAM
  
  DS1743

您可能感興趣的PDF文件資料

• DS1708TEPA
• DS1722S
• DS1742W-120
• DS1744WP
• DS1746P-70IND
• DS1705ESA
• DS17
• DS1702K
• DS17-08A
• DS1720
• DS1722U
• DS17285SN-5

熱門IC型號(hào)推薦

• D1FL40
• DMG6968U-7
• DTC124EETL
• DSEI60-10A
• DTC143ZUA T106
• DMP57D5UV-7
• DTA114EE
• DTC114TM
• DTC115EE TL
• DAN202KT146
• DS2502P
• D10LC20U