ISL1208资料下载.pdf

1、1FN8085.3ISL1208I2C Real Time Clock/CalendarLow Power RTC with Battery Backed SRAMThe ISL1208 device is a low power real time clock with timing and crystal compensation,clock/calendar,power fail indicator,periodic or polled alarm,intelligent battery backup switching and battery-backed user SRAM.The

2、oscillator uses an external,low-cost 32.768kHz crystal.The real time clock tracks time with separate registers for hours,minutes,and seconds.The device has calendar registers for date,month,year and day of the week.The calendar is accurate through 2099,with automatic leap year correction.PinoutISL12

3、08（8-PIN MSOP,SOIC）TOP VIEWFeatures Real Time Clock/Calendar-Tracks Time in Hours,Minutes,and Seconds-Day of the Week,Day,Month,and Year 15 Selectable Frequency Outputs Single Alarm-Settable to the Second,Minute,Hour,Day of the Week,Day,or Month-Single Event or Pulse Interrupt Mode Automatic Backup

4、to Battery or Super Cap Power Failure Detection On-Chip Oscillator Compensation 2 Bytes Battery-Backed User SRAM I2C Interface-400kHz Data Transfer Rate 400nA Battery Supply Current Same Pin Out as ST M41Txx and Maxim DS13xx Devices Small Package Options-8 Ld MSOP and SOIC Packages Pb-Free Plus Anne

5、al Available（RoHS Compliant）Applications Utility Meters HVAC Equipment Audio/Video Components Set Top Box/Television Modems Network Routers,Hubs,Switches,Bridges Cellular Infrastructure Equipment Fixed Broadband Wireless Equipment Pagers/PDA POS Equipment Test Meters/Fixtures Office Automation（Copie

6、rs,Fax）Home Appliances Computer Products Other Industrial/Medical/AutomotiveOrdering InformationPART NUMBER MARKINGVDD RANGETEMP.RANGE（C）PACKAGEISL1208IU8AGSYWW2.7V to 5.5V-40 to+858 Ld MSOPISL1208IU8-TKAGSYWW2.7V to 5.5V-40 to+858 Ld MSOP Tape and ReelISL1208IU8Z（See Note）ANWYWW2.7V to 5.5V-40 to+8

7、58 Ld MSOP（Pb-free）ISL1208IU8Z-TK（See Note）ANWYWW2.7V to 5.5V-40 to+858 Ld MSOP Tape and Reel（Pb-free）ISL1208IB81208YWW2.7V to 5.5V-40 to+858 Ld SOICISL1208IB8-TK1208YWW2.7V to 5.5V-40 to+858 Ld SOIC Tape and ReelISL1208IB8Z（See Note）1208YWWZ2.7V to 5.5V-40 to+858 Ld SOIC（Pb-free）ISL1208IB8Z-TK（See

8、Note）1208YWWZ2.7V to 5.5V-40 to+858 Ld SOIC Tape and Reel（Pb-free）NOTE:#Intersil Pb-free plus anneal products employ special Pb-free material sets;#molding compounds/die attach materials and 100%matte tin plate termination finish,which are RoHS compliant and compatible with both SnPb and Pb-free sol

9、dering operations.Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.*Contact Factory for availability.123487X1X2VBATVDDIRQ/FOUTSCLSDAGND56Data SheetJuly 29,2005CAUTION:#These devices are sensitive to e

10、lectrostatic discharge;#follow proper IC Handling Procedures.1-888-INTERSIL or 1-888-468-3774|Intersil（and design）is a registered trademark of Intersil Americas Inc.Copyright Intersil Americas Inc.2004,2005.All Rights ReservedAll other trademarks mentioned are the property of their respective owners

11、.2FN8085.3July 29,2005Block DiagramI2CINTERFACERTCCONTROLLOGICALARMFREQUENCYOUTRTCDIVIDERSDABUFFERCRYSTALOSCILLATORPORSWITCHSCLBUFFERSDASCLX1X2VDDVBATIRQ/FOUTINTERNALSUPPLYVTRIPSecondsMinutesHoursDay of WeekDateMonthYearUSERSRAMCONTROLREGISTERSPin DescriptionsPIN NUMBERSYMBOLDESCRIPTION1X1The X1 pin

12、 is the input of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz quartz crystal.X1 can also be driven directly from a 32.768kHz source.2X2The X2 pin is the output of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz

13、quartz crystal.3VBATThis input provides a backup supply voltage to the device.VBAT supplies power to the device in the event that the VDD supply fails.This pin should be tied to ground if not used.4GNDGround.5SDASerial Data（SDA）is a bidirectional pin used to transfer serial data into and out of the

14、device.It has an open drain output and may be wire ORed with other open drain or open collector outputs.6SCLThe Serial Clock（SCL）input is used to clock all serial data into and out of the device.7IRQ/FOUTInterrupt Output/Frequency Output is a multi-functional pin that can be used as interrupt or fre

15、quency output pin.The function is set via the configuration register.8VDDPower supply.ISL12083FN8085.3July 29,2005Absolute Maximum RatingsVoltage on VDD,VBAT,SCL,SDA,and IRQ pins（respect to ground）.-0.5V to 7.0VVoltage on X1 and X2 pins（respect to ground）.-0.5V to VDD+0.5（VDD Mode）-0.5V to VBAT+0.5（

16、VBAT Mode）Storage Temperature.-65C to+150CLead Temperature（Soldering,10s）.300CCAUTION:#Stresses above those listed in“Absolute Maximum Ratings”may cause permanent damage to the device.This is a stress only rating and operation of thedevice at these or any other conditions above those indicated in the operational sections of this specification is not implied.DC Operating Characteristics RTCTemperature=-40C to+85C,unless otherwise stated.SYMBOLPARAMETERCONDITIONSMINTYP（Note 4）MAXUNITSNOTESVDDMain Power