DATASHEET ISL1220 FN6315 Rev 1.00 Low Power RTC with 8 Bytes of Battery Backed SRAM and Separate FOUT August 7, 2015 The ISL1220 device is a low power real time clock with Features timing and crystal compensation, clock/calendar, power fail Real Time Clock/Calendar indicator, periodic or polled alarm, intelligent battery backup - Tracks Time in Hours, Minutes, and Seconds switching, battery-backed user SRAM and separate F OUT - Day of the Week, Day, Month, and Year and IRQ outputs. Frequency Output pin The oscillator uses an external, low-cost 32.768kHz crystal. - 15 Selectable Output Frequencies The real time clock tracks time with separate registers for hours, minutes, and seconds. The device has calendar Single Alarm with Separate Interrupt pin registers for date, month, year and day of the week. The - Settable to the Second, Minute, Hour, Day of the Week, calendar is accurate through 2099, with automatic leap year Day, or Month correction. - Single Event or Pulse Interrupt Mode Ordering Information Automatic Backup to Battery or Super Cap PART TEMP. Power Failure Detection NUMBER PART V RANGE PACKAGE DD (Note) MARKING RANGE (C) (Pb-Free) On-Chip Oscillator Compensation ISL1220IUZ-T 1220Z 2.7V to 5.5V -40 to +85 10 Ld MSOP 8 Bytes Battery-Backed User SRAM Tape and Reel 2 I C Interface ISL1220EVALZ Evaluation Board - 400kHz Data Transfer Rate NOTE: Intersil Pb-free products employ special Pb-free material sets 400nA Battery Supply Current molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both Small Package Option SnPb and Pb-free soldering operations. Intersil Pb-free products are - 10 Ld MSOP Package MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. Pb-Free Plus Anneal Available (RoHS Compliant) Applications Pinout ISL1220 Utility Meters (10 LD MSOP) HVAC Equipment TOP VIEW Audio/Video Components X1 V 1 10 DD Set Top Box/Television X2 IRQ 2 9 Modems V Network Routers, Hubs, Switches, Bridges BAT 3 8 SCL Cellular Infrastructure Equipment GND SDA 4 7 Fixed Broadband Wireless Equipment NC F 5 6 OUT Pagers/PDA POS Equipment Test Meters/Fixtures Office Automation (Copiers, Fax) Home Appliances Computer Products Other Industrial/Medical/Automotive FN6315 Rev 1.00 Page 1 of 21 August 7, 2015ISL1220 Block Diagram SDA SDA SECONDS BUFFER 2 I C CONTROL INTERFACE MINUTES SCL SCL LOGIC BUFFER HOURS DAY OF WEEK X1 CRYSTAL RTC DATE OSCILLATOR DIVIDER X2 MONTH V DD YEAR POR FREQUENCY ALARM OUT CONTROL V REGISTERS TRIP USER SWITCH SRAM V INTERNAL BAT SUPPLY IRQ GND F OUT Pin Descriptions PIN NUMBER SYMBOL DESCRIPTION 1 X1 The X1 pin 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. 2 X2 The X2 pin is the output of an inverting amplifier and is intended to be connected to one pin of an external 32.768kHz quartz crystal. 3V This input provides a backup supply voltage to the device. V supplies power to the device in the event that the BAT BAT V supply fails. This pin should be tied to ground if not used. DD 4 GND Ground. 5 NC No Connection 6F Frequency Output (F ). Open drain output, Programmable to be active/disabled in battery back up mode. OUT OUT 7 SDA Serial Data (SDA) is a bidirectional pin used to transfer serial data into and out of the device. It has an open drain output and may be wire ORed with other open drain or open collector outputs. 8 SCL The Serial Clock (SCL) input is used to clock all serial data into and out of the device. 9IRQ Interrupt Output. Open drain output, active low. 10 V Power supply. DD FN6315 Rev 1.00 Page 2 of 21 August 7, 2015