M41ST85W_11 STMICROELECTRONICS [STMicroelectronics], M41ST85W_11 Datasheet - Page 8

• Manufacturer Part Number: M41ST85W_11
• Description: 3.0/3.3 V I2C combination serial RTC, NVRAM supervisor and microprocessor supervisor
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Description
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Table 1.
1. For 28-pin, 300 mil embedded crystal SOIC only.
Figure 2.
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
(1)
Signal names
28-pin SOIC connections
RSTIN1
RSTIN2
SQW
PFO
V SS
WDI
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
NC
NC
NC
NC
NC
NC
NC
NC
Doc ID 7531 Rev 11
1
2
3
4
5
6
7
8
9
10
11
12
13
14
M41ST85W
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
M41ST85W