M41T80

M41T80 SERIAL ACCESS RTC WITH ALARMS FEATURES SUMMARY s 2.0 TO 5.5V CLOCK OPERATING VOLTAGE s Figure 2. 8-pin SOIC Package COUNTERS FOR TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEAR, and CENTURY SERIAL INTERFACE SUPPORTS I2C BUS (400KHz) PROGRAMMABLE ALARM and INTERRUPT FUNCTION LOW OPERATING CURRENT OF 200µA OPERATING TEMPERATURE OF –40 TO 85°C Table 1. Signal Names XI XO IRQ/OUT/ SQW IRQ/OUT/SQW M41T80 SCL SDA F32k s 8 1 s SO8 (M) s s Figure 1. Logic Diagram VCC Oscillator Input Oscillator Output Interrupt / Output Driver / Square Wave (Open Drain) Serial Data Input/Output Serial Clock Input 32kHz Square Wave Output (Open drain) Supply Voltage Ground XI XO SDA SCL F32k VCC VSS AI07005 VSS October 2002 1/20 M41T80 TABLE OF CONTENTS SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 8-pin SOIC Connections (Figure 3.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Block Diagram (Figure 4.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Absolute Maximum Ratings (Table 2.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 DC AND AC PARA...