IC SNAPHAT BATT/CRYSTAL 28-SOIC

M4T32-BR12SH1

Manufacturer Part NumberM4T32-BR12SH1
DescriptionIC SNAPHAT BATT/CRYSTAL 28-SOIC
ManufacturerSTMicroelectronics
M4T32-BR12SH1 datasheets
MSDS Material Safety Datasheet
 

Specifications of M4T32-BR12SH1

Battery TypeLi-(CF)Operating Supply Voltage0 V to 2.8 V
Maximum Operating Temperature+ 70 CMinimum Operating Temperature0 C
Package / CaseSOIC-28Mounting StyleSMD/SMT
Capacity120 mAhChemical SystemLithium Poly-Carbonmonoflouride
Primary TypePackSizeCylindrical
StandardsUL RecognizedTemperature, Operating0 to +75 °C
Temperature, Operating, Maximum70 °CTemperature, Operating, Minimum0 °C
TerminationSnap-OnVoltage, Battery3 V
Voltage, Rating3 VSupply Voltage Range2.8V
Battery Ic Case StyleSOICNo. Of Pins4
Operating Temperature Range0°C To +70°CCrystal TerminalsSnap On
Load Capacitance12.5pFRohs CompliantYes
Crystal Mounting TypeSMDLead Free Status / RoHS StatusLead free / RoHS Compliant
Other names497-3687-5  
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Operation modes
Also, as V
rises, the battery voltage is checked. If the voltage is less than approximately
CC
2.5 V, an internal battery not OK (BOK) flag will be set. The BOK flag can be checked after
power up. If the BOK flag is set, the first WRITE attempted will be blocked. The flag is
automatically cleared after the first WRITE, and normal RAM operation resumes.
illustrates how a BOK check routine could be structured.
For more information on battery storage life refer to the application note AN1012.
Figure 8.
Checking the BOK flag status
12/29
POWER-UP
READ DATA
AT ANY ADDRESS
WRITE DATA
COMPLEMENT BACK
TO SAME ADDRESS
READ DATA
AT SAME
ADDRESS AGAIN
IS DATA
NO
(BATTERY LOW)
COMPLEMENT
OF FIRST
READ?
NOTIFY SYSTEM
(BATTERY OK)
YES
OF LOW BATTERY
(DATA MAY BE
CORRUPTED)
WRITE ORIGINAL
DATA BACK TO
SAME ADDRESS
CONTINUE
Doc ID 6845 Rev 8
M48T35AV
Figure 8
AI00607