M4T32-BR12SH STMICROELECTRONICS [STMicroelectronics], M4T32-BR12SH Datasheet - Page 27

• Manufacturer Part Number: M4T32-BR12SH
• Description: 5.0 OR 3.0V, 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Figure 22. Power Down/Up Mode AC Waveforms
Table 13. Power Down/Up AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: T
Symbol
t
t
t
rec
t
FB
t
t
PFD
2. V
3. V
4. Programmable (see
F
t
PD
RB
R
(2)
(3)
(4)
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 6., page
(min) V
VALID
SS
PFD
RECOGNIZED
PFD
PFD
V
tF
(min).
(max) V
(min) V
CC
CC
Parameter
Fall Time
Rise Time
22)
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
tDR
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
40
0
1
Typ
M41ST85Y, M41ST85W
15
tR
(PER CONTROL INPUT)
trec
Max
RECOGNIZED
200
25
VALID
AI03661
Unit
ms
µs
µs
µs
µs
µs
µs
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