The RTC/alarm and calendar information is accessed by reading/writing the appropriate bytes in the register page, address 200h t0 206h. Note that some bits are set t0 0. These bits will always read 0 regardless of how they are written. The contents of the time, calendar, and alarm registers are in the Binary-Coded Decimal (BCD) format.
PC74HC154PN PC74HC154PN PC74HC154PN Price| TA = 25'C VCE = 5.0 V | | | Normalized to IF = 10 mA |
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PC74HC154PN PC74HC154PN PC74HC154PN on stock| | mm | inch |
| DIM | MIN | TYP | MAX | MIN | TYP | MAX |
| A | 978 | | 10.03 | 0.385 | | 0.395 |
| B | 8.89 | | 9.04 | 0.350 | | 0.356 |
| D | 42 | | 4.57 | 0.165 | | 0.180 |
| dl | | 2.54 | | | 0.100 | |
| d2 | | 0.56 | | | 0.022 | |
| E | 7.37 | | 8.38 | 0290 | | 0.330 |
| e | | 1 27 | | | 0.050 | |
| e3 | | 5.08 | | | 0200 | |
| F | | 0.38 | | | 0.015 | |
| G | | | O101 | | | 0.004 |
| M | | 1 27 | | | 0.050 | |
| M1 | | 1.14 | | | 0.045 | |
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