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T48C862-R4 数据表(PDF) 97 Page - ATMEL Corporation |
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T48C862-R4 数据表(HTML) 97 Page - ATMEL Corporation |
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97 / 107 page ![]() 97 T48C862-R4 [Preliminary] 4551C–4BMCU–01/04 Crystal Characteristics Figure 93. Crystal Equivalent Circuit 32-kHz Crystal Oscillator (Operating Range V DD = 2.0 V to 4.0 V) Frequency f X 32.768 kHz Start-up time t SQ 0.5 s Stability ∆f/f -10 10 ppm Integrated input/output capacitances (configurable) C IN/COUT programmable C IN C OUT 0, 2, 5, 7, 10 or 12 0, 2, 5, 7, 10 or 12 pF pF External 32-kHz Crystal Parameters Crystal frequency f X 32.768 kHz Serial resistance RS 30 50 k Ω Static capacitance C 0 1.5 pF Dynamic capacitance C1 3 fF External 4-MHz Crystal Parameters Crystal frequency f X 4.0 MHz Serial resistance RS 40 150 W Static capacitance C 0 1.4 3 pF Dynamic capacitance C1 3 fF EEPROM Operating current during erase/write cycle I WR 600 1300 µA Endurance Erase-/write cycles Tamb = 125° C E D E D 500000 10000 1000000 20000 Cycles Cycles Data erase/write cycle time For 16-bit access t DEW 913 ms Data retention time T amb = 125° C t DR tDR 100 1 Years Years Power-up to read operation tPUR 0.2 ms Power-up to write operation tPUW 0.2 ms Program EEPROM Erase-/write cycles, Tamb = 0 to 40° CnEW 100 1000 Cycles Serial Interface SCL clock frequency fSC_MCL 100 500 kHz AC Characteristics (Continued) Supply voltage VDD = 1.8 to 4.0 V, VSS = 0 V, Tamb = 25° C unless otherwise specified. Parameters Test Conditions Symbol Min. Typ. Max. Unit L C1 RS C0 OSCIN OSCOUT Equivalent circuit SCLIN SCLOUT |
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