Low Power and Low Cost RTC with Alarm Function and Dual IRQ pins

The ISL12057 device is a low power real time clock that is pin compatible and functionally equivalent to Maxim DS1337 with clock/calendar and alarm function.

The 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.

特性 Features

? Pin Compatible to Maxim DS1337

? Functionally Equivalent to Maxim DS1337

? Real Time Clock/Calendar

- Tracks Time in Hours, Minutes, and Seconds

- Day of the Week, Date, Month, and Year

? Dual Interrupts for Frequency Output and Alarm interrupts

? 4 Selectable Frequency Outputs

? 2 Alarms

- Settable to the Second, Minute, Hour, Day of the Week, and Date

? I2C Interface

- 400kHz Data Transfer Rate

? Small Package Options

- 8 Ld 2mmx2mm μTDFN

- 8 Ld MSOP

- 8 Ld SOIC

- Pb-Free (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

? Point Of Sale Equipment

? Test Meters/Fixtures

? Office Automation (Copiers, Fax)

? Home Appliances

? Computer Products

? Other Industrial/Medical/Automotive