M4T32-BR12SH 3.0V, SERIAL NVRAM SUPERVISOR
M4T32-BR12SH1 TIMEKEEPER SNAPHAT Battery Crystal
M4T32-BR12SH1TR TIMEKEEPER SNAPHAT (BATTERY CRYSTAL)
M4T32-BR12SH6 TIMEKEEPER SNAPHAT Battery Crystal
M4T32-BR12SH6TR TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL)
M4T32-BR12SHX Serial real-time clock with 44 bytes NVRAM and reset