DATASHEET ISL12057 FN6755 2 Rev 2.00 Low Cost and Low Power I C RTC Real Time Clock/Calendar with Alarm Function Sep 25, 2015 and Dual IRQ Pins The ISL12057 device is a low-power, real-time clock that is Features pin compatible and functionally equivalent to Maxim DS1337 Pin Compatible to Maxim DS1337 with clock/calendar and alarm function. Functionally Equivalent to Maxim DS1337 The oscillator uses an external, low-cost 32.768kHz crystal with 6pF load capacitance. The real-time clock tracks time Real-Time Clock/Calendar with separate registers for hours, minutes, and seconds. The - Tracks Time in Hours, Minutes, and Seconds device has calendar registers for date, month, year, and day - Day of the Week, Date, Month, and Year of the week. The calendar is accurate through 2099, with Dual Interrupts for Frequency Output and Alarm automatic leap year correction. interrupts Pinouts Four Selectable Frequency Outputs ISL12057 Two Alarms (8 LD SOIC, MSOP) - Settable to the Second, Minute, Hour, Day of the Week, TOP VIEW and Date 2 X1 1 8 V DD I C Interface X2 2 7 IRQ1/F OUT - 400kHz Data Transfer Rate IRQ2 3 6 SCL Small Package Options GND 4 5 SDA - 8 Ld 2mmx2mm UTDFN - 8 Ld MSOP - 8 Ld SOIC - Pb-Free (RoHS Compliant) ISL12057 (8 LD UTDFN) Applications TOP VIEW Utility Meters HVAC Equipment X1 V 1 8 DD Audio/Video Components X2 2 7 IRQ1/F OUT IRQ2 SCL 3 6 Set-Top Box/Television GND 4 5 SDA Modems Network Routers, Hubs, Switches, Bridges Cellular Infrastructure Equipment Fixed Broadband Wireless Equipment Pagers/PDA Point Of Sale Equipment Test Meters/Fixtures Office Automation (Copiers, Fax) Home Appliances Computer Products Other Industrial/Medical/Automotive FN6755 Rev 2.00 Page 1 of 18 Sep 25, 2015 NO ONGER A LA L L AV I B E OR SUPPORTEDISL12057 Ordering Information PART PART V RANGE TEMP. RANGE PACKAGE PKG. DD NUMBER MARKING (V) (C) (Pb-Free) DWG. ISL12057IBZ (Notes 1, 2) 12057 IBZ 1.4 to 3.6 -40 to +85 8 Ld SOIC M8.15 ISL12057IUZ (Notes 1, 2) 12057 1.4 to 3.6 -40 to +85 8 Ld MSOP M8.118 ISL12057IRUZ-T (Notes 3, 4) 057 1.4 to 3.6 -40 to +85 8 Ld UTDFN (Tape and Reel) L8.2x2 (No longer available or supported) ISL12057EVALZ Evaluation Board NOTES: 1. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering 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. 2. Add -T* suffix for tape and reel. Please refer to TB347 for details on reel specifications. 3. These Intersil Pb-free plastic packaged products employ special Pb-free material sets molding compounds/die attach materials and NiPdAu plate - e4 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering 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. 4. Please refer to TB347 for details on reel specifications. Block Diagram SDA SECONDS SDA BUFFER 2 I C RTC INTERFACE MINUTES SCL SCL CONTROL BUFFER LOGIC HOURS DAY OF WEEK X1 CRYSTAL RTC DATE OSCILLATOR DIVIDER X2 MONTH YEAR V DD POR FREQUENCY ALARM1 ALARM2 OUT CONTROL REGISTERS IRQ2 INTERNAL SUPPLY IRQ1/F OUT FN6755 Rev 2.00 Page 2 of 18 Sep 25, 2015