Data Sheet

TIMEKEEPER products AN1012
18/33 Doc ID 6395 Rev 4
If data retention lifetimes greater than those shown are required, the user is advised to
choose the version of the device in a SNAPHAT
®
package. Then, as the battery starts to
reach the end of its useful life, it is possible to remove the SNAPHAT top containing the
nearly expended cell and replace it with a fresh SNAPHAT top. No data will be lost during
the process, provided that the board remains powered up during the operation (although
some time will be lost due to the momentary removal of the 32 kHz crystal). Tabl e 4 shows
which SNAPHAT top part numbers are available.
Table 4. SNAPHAT part numbers
Part Number Description Package
M4Z28-BR00SH Li Battery (48mAh) for ZEROPOWER products and SUPERVISORS SNAPHAT
M4Z32-BR00SH Li Battery (120mAh) for ZEROPOWER products and SUPERVISORS SNAPHAT
M4T28-BR12SH Li Battery (48mAh) for TIMEKEEPER products and SUPERVISORS SNAPHAT
M4T32-BR12SH Li Battery (120mAh) for TIMEKEEPER products and SUPERVISORS SNAPHAT