m41st85w STMicroelectronics, m41st85w Datasheet - Page 33

• Manufacturer Part Number: m41st85w
• Description: 3.0/3.3v I 2c Combination Serial Rtc, Nvram Supervisor And Microprocessor Supervisor
• Manufacturer: STMicroelectronics

Figure 20. Power down/up mode AC waveforms
Table 13.
1. Valid for Ambient Operating Temperature: T
2. V
3. V
4. Programmable (see
Symbol
200µs after V
t
t
t
rec
PFD
PFD
t
FB
t
PFD
t
F
PD
t
RB
(2)
R
(3)
(4)
(max) to V
(min) to V
V CC
V PFD (max)
V PFD (min)
V SO
INPUTS
RST
OUTPUTS
E CON
Power down/up AC characteristics
V
V
EX at V
PFI to PFO Propagation Delay
V
V
Power up Deselect Time
CC
PFD
PFD
PFD
SS
SS
PFD
passes V
to V
fall time of less than t
PFO
(max) to V
(min) to V
(min) to V
(min) fall time of less than t
Table 6 on page
tPD
IH
PFD
(PER CONTROL INPUT)
before Power Down
(min) V
PFD
VALID
RECOGNIZED
SS
PFD
(min).
PFD
tF
V
(max) V
(min) V
CC
CC
Parameter
28)
Rise Time
Fall Time
FB
CC
CC
may cause corruption of RAM data.
A
Fall Time
Rise Time
= –40 to 85°C; V
F
tFB
(1)
may result in deselection/write protection not occurring until
CC
tDR
DON'T CARE
= 2.7 to 3.6V (except where otherwise noted).
HIGH-Z
tRB
Min
300
10
10
40
0
1
Typ
15
tR
(PER CONTROL INPUT)
trec
Max
200
RECOGNIZED
25
VALID
AI03661
Unit
ms
µs
µs
µs
µs
µs
µs
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