M41ST84WMH ST Microelectronics, M41ST84WMH Datasheet - Page 5

• Manufacturer Part Number: M41ST84WMH
• Description: 5.0 or 3.0V / 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS
• Manufacturer: ST Microelectronics

Figure 4. 16-pin SOIC Connections
Figure 6. Block Diagram
Note: 1. Open drain output
Crystal
RSTIN
V BAT
PFO
RST
V SS
WDI
RSTIN
1.25V
(Internal)
XO
V CC
SDA
SCL
WDI
XI
PFI
1
2
3
4
5
6
7
8
V BAT
M41ST84W
M41ST84Y
OSCILLATOR
INTERFACE
AI03678
32KHz
I 2 C
16
15
14
13
12
11
10
9
V PFD = 4.4V
V SO = 2.5V
V BL = 2.5V
V CC
NC
IRQ/FT/OUT
NC
PFI
SQW
SCL
SDA
(2.65V for ST84W)
COMPARE
COMPARE
COMPARE
COMPARE
Figure 5. 28-pin SOIC Connections
REAL TIME CLOCK
& CALIBRATION
SQUARE WAVE
RTC w/ALARM
WATCHDOG
CALENDAR
USER RAM
44 BYTES
POR
RSTIN
SQW
PFO
V SS
WDI
NC
NC
NC
NC
NC
NC
NC
NC
NC
BL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
AF
WDF
M41ST84W
M41ST84Y
M41ST84Y, M41ST84W
AI03679
28
27
26
25
24
23
22
21
20
19
18
17
16
15
IRQ/FT/OUT (1)
SQW
POWER
RST (1)
PFO
V CC
NC
IRQ/FT/OUT
NC
NC
NC
PFI
NC
SCL
NC
RST
NC
SDA
NC
AI03931
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