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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN1012 датащи(PDF) 17 Page - STMicroelectronics |
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AN1012 датащи(HTML) 17 Page - STMicroelectronics |
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17 / 33 page  AN1012 TIMEKEEPER products Doc ID 6395 Rev 4 17/33 5.2.4 M48T35 and M48T37V/Y The M48T35 and M48T37V/Y families use the same technology as the M48T58 device, but with a 32K x 8 SRAM array. Figure 10 and Figure 11 show the expected battery lifetime versus temperature. The expected battery lifetime (at 30 °C with no periods of valid VCC) is typically 6.8 years (this assumes that a 48 mAh battery is used, see Figure 10). Devices in the larger M4T32-BR12SH SNAPHAT® package have a data retention lifetime of greater than twice this (almost 17 years, see Figure 11). Figure 10. M48T35/37V/37Y data retention lifetime vs. temperature (48 mAh, 100% battery backup) Figure 11. M48T35/37V/37Y data retention lifetime vs. temperature (120 mAh, 100% battery backup) |
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