M41ST85WMX6E STMICROELECTRONICS [STMicroelectronics], M41ST85WMX6E Datasheet - Page 5

• Manufacturer Part Number: M41ST85WMX6E
• Description: 3.0/3.3V I2C Combination Serial RTC, NVRAM Supervisor and Microprocessor Supervisor
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Figure 3. Logic Diagram
Note: 1. For 28-pin, 300mil embedded crystal SOIC only.
Figure 4. 28-pin SOIC Connections
RSTIN1
RSTIN2
RSTIN1
RSTIN2
SDA
SCL
WDI
PFI
EX
SQW
PFO
V SS
WDI
NC
NC
NC
NC
NC
NC
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
V CC
M41ST85W
V SS
M41ST85W
V BAT (1)
AI03659
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V CC
EX
IRQ/FT/OUT
V OUT
NC
NC
PFI
NC
SCL
NC
RST
NC
SDA
E CON
E CON
RST
IRQ/FT/OUT
SQW
PFO
V OUT
AI03658
Table 1. Signal Names
Note: 1. For 28-pin, 300mil embedded crystal SOIC only.
Figure 5. 28-pin, 300mil SOIC (MX)
Connections
Note: No Function (NF) pins should be tied to V
E
EX
IRQ/FT/OUT
PFI
PFO
RST
RSTIN1
RSTIN2
SCL
SDA
SQW
WDI
V
V
V
V
NC
NF
CON
CC
OUT
SS
BAT
RSTIN1
RSTIN2
4 are internally shorted together.
(1)
SQW
PFO
V SS
WDI
NC
NC
NC
NC
NF
NF
NF
NF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Conditioned Chip Enable Output
External Chip Enable
Interrupt/Frequency Test/Out Output
(Open Drain)
Power Fail Input
Power Fail Output
Reset Output (Open Drain)
Reset 1 Input
Reset 2 Input
Serial Clock Input
Serial Data Input/Output
Square Wave Output
Watchdog Input
Supply Voltage
Voltage Output
Ground
Battery Supply Voltage
No Connect
No Function
M41ST85W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V CC
EX
IRQ/FT/OUT
V OUT
NC
PFI
SCL
NC
NC
RST
NC
SDA
E CON
V BAT
SS
M41ST85W
. Pins 1, 2, 3, and
AI06370d
5/34