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M41ST87WMX6TR Datasheet(PDF) 45 Page - STMicroelectronics

Part # M41ST87WMX6TR
Description  5.0 and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM
PDF  54 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41ST87WMX6TR Datasheet(HTML) 45 Page - STMicroelectronics

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M41ST87W
DC and AC parameters
DocID9497 Rev 11
45/54
Figure 28: Power down/up mode AC waveforms
1.
E̅
CON available in the SOX28 package only.
Table 21: Power down/up AC characteristics
Symbol
Parameter
(1)
Min
Typ
Max
Unit
tF
(2)
VPFD(max) to VPFD(min) VCC fall time
300
µs
tFB
(3)
VPFD(min) to VSS VCC fall time
10
µs
tPD
EXatVIHbeforepowerdown
0
µs
tPFD
PFI to
PFOpropagationdelay
15
25
µs
tR
VPFD(min) to VPFD(max) VCC rise time
10
µs
tRB
VSS to VPFD(min) VCC rise time
1
µs
trec
Power-up deselect time
96
98
(4)
ms
Notes:
(1)
Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 4.5 to 5.5 V or 2.7 to 3.6 V (except where noted).
(2)
VPFD(max) to VPFD(min) fall time of less than tF may result in deselection/write protection not occurring until 200 µs after VCC
passes VPFD(min).
(3)
VPFD(min) to VSS fall time of less than tFB may cause corruption of RAM data.
(4)
Programmable (see
Table 13: "trec definitions")
VCC
INPUTS
(PER CONTRO L INPUT)
OUTPUTS
DON'T CARE
HIGH-Z
t F
t FB
t R
tPD
t RB
VALID
VALID
(PER CONTRO L INPUT)
RECOGNIZED
RECOGNIZED
VPFD (max)
VPFD (min)
VSO
t rec
RST
ECON
(1)
PFO
VALID
VALID



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