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M4T28-BR12SH 데이터시트(PDF) 4 Page - STMicroelectronics |
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M4T28-BR12SH 데이터시트(HTML) 4 Page - STMicroelectronics |
4 / 12 page M4T28-BR12SH, M4T32-BR12SH 4/12 MAXIMUM RATING Stressing the device above the rating listed in the “Absolute Maximum Ratings” table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicat- ed in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rat- ing conditions for extended periods may affect de- vice reliability. Refer also to the STMicroelectronics SURE Program and other rel- evant quality documents. Table 2. Absolute Maximum Ratings Note: 1. Only the M4T32-BR12SH is available in Industrial temperature (Grade 6). CAUTION: Do NOT wave solder SOIC to avoid damaging SNAPHAT sockets. DC AND AC PARAMETERS This section summarizes the operating and mea- surement conditions, as well as the DC and AC characteristics of the device. The parameters in the following DC and AC Characteristic tables are derived from tests performed under the Measure- ment Conditions listed in the relevant tables. De- signers should check that the operating conditions in their projects match the measurement condi- tions when using the quoted parameters. Table 3. Operating and AC Measurement Conditions Symbol Parameter Value Unit TA Ambient Operating Temperature Grade 1 0 to 70 °C Grade 6(1) –40 to 85 °C TSTG Storage Temperature (VCC Off, Oscillator Off) –40 to 85 °C Parameter M4T28-BR12SH M4T32-BR12SH Unit Nominal Battery Voltage (VCC) 2.8 2.8 V Nominal Battery Capacity 48 120 mAh Battery Chemistry Li(CF) Li(CF) Crystal Load Capacitance (CL) 12.5 12.5 pF Nominal Crystal Frequency 32.768 32.768 kHz Crystal Accuracy (@ 25°C) ± 35 ± 35 ppm |
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