m41st87w STMicroelectronics, m41st87w Datasheet - Page 7

• Manufacturer Part Number: m41st87w
• Description: 5.0, 3.3, Or 3.0v, 1280 Bit 160 X8 Secure Serial Rtc And Nvram Supervisor With Tamper Detection
• Manufacturer: STMicroelectronics

Figure 4. Block Diagram
Note: 1. Open drain output.
V
OUT
2. Programmable output (Open drain or Full-CMOS); if open drain option is selected and if pulled-up to supply other than V
TPX
supply must be equal to, or less than 3.0V when V
IN
Crystal
RSTIN1
RSTIN2
1.25V
(Internal)
1.25V
(Internal)
SDA
SCL
WDI
PFI
PFI
V
EX
CC
1
2
V
BAT
OSCILLATOR
INTERFACE
32KHz
I
2
C
V
V
V
SO
PFD
BL
CC
= 0V (during battery back-up mode).
COMPARE
COMPARE
COMPARE
COMPARE
COMPARE
CLR
X
REAL TIME CLOCK
& CALIBRATION
SQUARE WAVE
8 BYTES ROM
RTC w/ALARM
WATCHDOG
CALENDAR
128 BYTES
USER RAM
TAMPER
POR
BL
OFIE
WDS
AFE
CLRX
M41ST87Y, M41ST87W
EXT
TIE
X
IRQ/OUT
SQW/FT
TP
V
F
32k
OUT
AI07026
RST
E
PFO
PFO
CLR
CON
(1)
(1)
1
2
(2)
(2)
CC
(2)
(1)
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