m41st87w STMicroelectronics, m41st87w Datasheet - Page 38

• 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

M41ST87Y, M41ST87W
Figure 28. Power Down/Up Mode AC Waveforms
Table 18. Power Down/Up AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: T
38/42
Symbol
t
t
t
FB
t
t
t
PFD
2. V
3. V
4. Programmable (see
F
t
PD
RB
rec
R
(2)
(3)
200µs after V
PFD
PFD
V CC
V PFD (max)
V PFD (min)
V SO
RST
INPUTS
OUTPUTS
E CON
(max) to V
(min) to V
V
V
EX at V
PFI to PFO Propagation Delay
V
V
Power up Deselect Time
PFD
PFD
PFD
SS
CC
to V
PFO
(max) to V
(min) to V
(min) to V
SS
PFD
passes V
IH
tPD
fall time of less than t
PFD
(min) fall time of less than t
before Power Down
(PER CONTROL INPUT)
Table 12., page
(min) V
VALID
RECOGNIZED
SS
PFD
PFD
PFD
VALID
V
tF
(min).
(max) V
(min) V
CC
CC
Parameter
Fall Time
Rise Time
33)
CC
CC
FB
may cause corruption of RAM data.
Fall Time
Rise Time
A
tFB
(1)
= –40 to 85°C; V
F
may result in deselection/write protection not occurring until
CC
DON'T CARE
= 4.5 to 5.5V or 2.7 to 3.6V (except where noted).
HIGH-Z
tRB
Min
300
10
10
96
0
1
Typ
15
tR
(PER CONTROL INPUT)
trec
RECOGNIZED
98
Max
25
VALID
VALID
(4)
AI07085
Unit
ms
µs
µs
µs
µs
µs
µs