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M48T59-70MH1 датащи(PDF) 24 Page - STMicroelectronics |
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M48T59-70MH1 датащи(HTML) 24 Page - STMicroelectronics |
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24 / 32 page ![]() Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) DC and AC parameters M48T59, M48T59Y, M48T59V 24/32 Table 12. Power down/up AC characteristics Table 13. Power down/up trip points DC characteristics Symbol Parameter(1) 1. Valid for ambient operating temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5 V, 4.75 to 5.5 V, or 3.0 to 3.6 V (except where noted). Min Max Unit tPD E or W at VIH before power down 0 µs tF (2) 2. VPFD (max) to VPFD (min) fall time of less than tF may result in deselection/write protection not occurring until 200µs after VCC passes VPFD (min). VPFD (max) to VPFD (min) VCC fall time 300 µs tFB (3) 3. VPFD (min) to VSS fall time of less than tFB may cause corruption of RAM data. VPFD (min) to VSS VCC fall time 10 µs tR VPFD (min) to VPFD (max) VCC rise time 10 µs tRB VSS to VPFD (min) VCC rise time 1 µs trec VPFD (max) to RST high 40 200 ms Symbol Parameter(1)(2) 1. Valid for ambient operating temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5 V, 4.75 to 5.5 V, or 3.0 to 3.6 V (except where noted). 2. All voltages referenced to VSS. Min Typ Max Unit VPFD Power-fail deselect voltage M48T59 4.5 4.6 4.75 V M48T59Y 4.2 4.35 4.5 V M48T59V 2.7 2.9 3.0 V VSO Battery back-up switchover voltage M48T59/Y 3.0 V M48T59V VPFD –100mV V tDR (3) 3. At 25°C, VCC = 0 V. Expected data retention time 7 YEARS |
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