M41T80 Datasheet, PDF (1/20 Pages) STMicroelectronics – SERIAL ACCESS RTC WITH ALARMS

M41T80
SERIAL ACCESS RTC WITH ALARMS
FEATURES SUMMARY
s 2.0 TO 5.5V CLOCK OPERATING VOLTAGE
s COUNTERS FOR TENTHS/HUNDREDTHS
OF SECONDS, SECONDS, MINUTES,
HOURS, DAY, DATE, MONTH, YEAR, and
CENTURY
s SERIAL INTERFACE SUPPORTS I²C BUS
(400KHz)
s PROGRAMMABLE ALARM and INTERRUPT
FUNCTION
s LOW OPERATING CURRENT OF 200µA
s OPERATING TEMPERATURE OF –40 TO
85°C
Figure 1. Logic Diagram
VCC
XI
XO
SCL
SDA
M41T80
IRQ/OUT/SQW
F32k
VSS
AI07005
Figure 2. 8-pin SOIC Package
8
1
SO8 (M)
Table 1. Signal Names
XI
Oscillator Input
XO
Oscillator Output
IRQ/OUT/
SQW
Interrupt / Output Driver / Square
Wave (Open Drain)
SDA
Serial Data Input/Output
SCL
Serial Clock Input
F_32k
32kHz Square Wave Output (Open
drain)
V_CC
Supply Voltage
V_SS
Ground
October 2002
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