M48T129V, M48T129Y DC and AC parameters
Doc ID 5710 Rev 5 23/28
Figure 14. Power down/up mode AC waveforms
Table 11. Power down/up AC characteristics
Table 12. Power down/up trip points DC characteristics
Symbol Parameter
(1)
1. Valid for ambient operating temperature: T
A
= 0 to 70 °C; V
CC
= 4.5 to 5.5 V or 3.0 to 3.6 V (except where noted).
Min Max Unit
t
F
(2)
2. V
PFD
(max) to V
PFD
(min) fall time of less than t
F
may result in deselection/write protection not occurring until 200 µs after
V
CC
passes V
PFD
(min).
V
PFD
(max) to V
PFD
(min) V
CC
fall time 300 µs
t
FB
(3)
3. V
PFD
(min) to V
SS
fall time of less than t
FB
may cause corruption of RAM data.
V
PFD
(min) to V
SS
V
CC
fall time
M48T129Y 10 µs
M48T129V 150 µs
t
R
V
PFD
(min) to V
PFD
(max)
V
CC
rise time 0 µs
t
RB
V
SS
to V
PFD
(min) V
CC
rise time 1 µs
t
REC
V
PFD
(max) to RST high 40 200 ms
AI01805
V
CC
INPUTS
OUTPUTS
DON'T CARE
HIGH-Z
tF
tFB
tR
tRB
VALID VALID
RECOGNIZEDRECOGNIZED
V
PFD
(max)
V
PFD
(min)
V
SO
tREC
RST
Symbol Parameter
(1)(2)
1. All voltages referenced to V
SS
.
2. Valid for ambient operating temperature: T
A
= 0 to 70 °C; V
CC
= 4.5 to 5.5 V or 3.0 to 3.6 V (except where noted).
Min Typ Max Unit
V
PFD
Power-fail deselect voltage
M48T129Y 4.2 4.35 4.5 V
M48T129V 2.7 2.9 3.0 V
V
SO
Battery backup switchover voltage
M48T129Y 3.0 V
M48T129V V
PFD
–100mV
t
DR
(3)
3. At 25 °C; V
CC
= 0 V.
Expected data retention time 10 YEARS
Obsolete Product(s) - Obsolete Product(s)
