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RV-2251-C3

RV-2251-C3
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Real Time Clock Module with I2C Bus DIMENSIONS Package: 100% leadfree, RoHS - compliant Miniature SMT ceramic package with integrated 32.768kHz Crystal Automotive qualified, according to AEC-Q200 Rev. C Smart Backup Supply and Battery Management System 3.0 V Regulated Output for ML rechargeable batteries Level shifter for CPU interface Two Alarm Interrupt circuits Periodic Interrupt function Very low power consumption I2C Bus Interface (400 kHz) Time keeping down to 0.7 V DESCRIPTION: The RV-2251-C3 includes a Smart Backup Supply and Battery Management System with Automatic Backup Switchover. A voltage regulator output with VREG = 3.0 V is provided for ML rechargeable batteries. Additionaly, a level shifter with monitored power supply input VIO is integrated for interfacing with CPU (I2C and CLKOUT). The calendar function tracks Weekdays, Date, Month and Years with automatic leap year calculation. The clock function tracks Seconds, Minutes and Hours in 12 or 24 hour format. Two programmable Alarm settings and a Periodic Interrupt function increase ﬂexibility. For pick-and-place equipment, the parts are available in 12 mm tape: 7” (178 mm) reel with 1'000 parts 7” (178 mm) reel with 3'000 parts BLOCK DIAGRAM: VOLTAGE DETECTOR1 VDD VREG VOLTAGE REGULATOR INTERNAL POWER SUPPLY & POR BATTERY MONITOR XTAL OSC FREQUENCY DIVIDER & OFFSET COMPENSATION VIOL CONTROL LEVEL SHIFTER nINT CONTROL SYSTEM CONTROL LOGIC Seconds Minutes Hours Weekdays Date Months Years Offset Alarm_W Minutes Alarm_W Hours Alarm_W Weekday Alarm_D Minutes Alarm_D Hours RAM Control1 Control2

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Symbol Peripheral voltage Time keeping Supply voltage Power current during access Current consumption Time keeping mode CLKOUT frequency Frequency tolerance Aging ﬁrst year max. 1) Tighter and wider frequency tolerances on request. ENVIRONMENTAL CHARACTERISTICS: Conditions Storage temp. range TA Operating temperature range Shock resistance Vibration resistance For SMD mounting Au plated pads FREQUENCY TEMPERATURE CHARACTERISTICS: Tuning Fork Crystal Production Date Code 11 Connection VIO Monitoring Output VIOL INT Interrupt Output SDA Serial Data ECO Oscillator Mode Select VIO Peripheral...

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