Product Summary
The M41T81M6F is a Serial Access timekeeper SRAM. The M41T81M6F is a low power Serial RTC with a built-in 32.768 KHz oscillator (external crystal controlled). Eight bytes of the SRAM (see Table 10, page 16) are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. An additional 12 bytes of SRAM provide status/control of Alarm, Watchdog and Square Wave functions. Addresses and data are transferred serially via a two line, bi-directional I2C interface.
Parametrics
M41T81M6F absolute maximum ratings: (1)TSTG, Storage Temperature (VCC Off, Oscillator Off) SOIC: -55 to 125℃; (2)VCC, Supply Voltage: -0.3 to 7 V; (3)TSLD(1), Lead Solder Temperature for 10 Seconds: 260℃; (4)VIO, Input or Output Voltages: -0.3 to Vcc+0.3 V; (5)IO, Output Current: 20 mA; (6)PD, Power Dissipation: 1 W.
Features
M41T81M6F features: (1)2.0 to 5.5v clock operating voltage; (2)counters for tenths/hundredths of seconds, seconds, minutes,; (3)hours, day, date, month, year, and century; (4)automatic switch-over and deselect circuitry; (5)serial interface supports i2c bus (400khz protocol); (6)programmable alarm and interrupt function (valid even during battery back-up mode); (7)watchdog timer; (8)low operating current of 400μa; (9)battery back-up not recommended for 3.0v applications (capacitor; (10)back-up only); (11)battery or super-cap back-up; (12)operating temperature of -40 to 85℃; (13)ultra-low battery supply current of 1ma; (14)package options include a 28-lead or; (15)18-lead embedded crystal soic.
Diagrams
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![]() Real Time Clock Serial 512 (64x8) |
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