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M4T28-BR12SH 데이터시트(PDF) 4 Page - STMicroelectronics

부품명 M4T28-BR12SH
상세설명  TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL)
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M4T28-BR12SH 데이터시트(HTML) 4 Page - STMicroelectronics

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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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