M4T28-BR12SH ST Microelectronics, M4T28-BR12SH Datasheet - Page 6

• Manufacturer Part Number: M4T28-BR12SH
• Description: TIMEKEEPER SNAPHAT Battery & Crystal
• Manufacturer: ST Microelectronics

M41ST85Y, M41ST85W
Figure 6. Block Diagram
Note: 1. Open drain output
6/33
Crystal
2. Integrated into SOIC package for MX package option.
RSTIN1
RSTIN2
1.25V
(Internal)
(2)
V CC
SDA
SCL
WDI
PFI
EX
V BAT
OSCILLATOR
INTERFACE
32KHz
I 2 C
V PFD = 4.4V
V SO = 2.5V
V BL = 2.5V
(2.65V for ST85W)
COMPARE
COMPARE
COMPARE
COMPARE
REAL TIME CLOCK
& CALIBRATION
SQUARE WAVE
RTC w/ALARM
WATCHDOG
CALENDAR
USER RAM
44 BYTES
POR
BL
AFE
WDS
IRQ/FT/OUT
SQW
V OUT
RST (1)
E CON
PFO
AI03932
(1)