ISL12057 Datasheet, PDF (1/17 Pages) Intersil Corporation – Low Cost and Low Power I2C RTC Real Time Clock/Calendar

ISL12057
®
Low Cost and Low Power I²C RTC Real Time Clock/Calendar
Data Sheet
June 15, 2009
FN6755.0
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.
Pinouts
ISL12057
(8 LD SOIC, MSOP)
TOP VIEW
X1 1
X2 2
IRQ2 3
GND 4
8 V_DD
7 IRQ1/F_OUT
6 SCL
5 SDA
ISL12057
(8 LD µTDFN)
TOP VIEW
X1 ₁
X2 2
IRQ2 3
GND 4
8 ^VDD
7 IRQ1/F_OUT
6 SCL
5 SDA
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
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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