M48T59-70PC1TR 查看數據表（PDF） - STMicroelectronics
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M48T59-70PC1TR Datasheet PDF : 29 Pages
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M48T59, M48T59Y, M48T59V*
Figure 16. Power Down/Up Mode AC Waveforms
VCC
VPFD (max)
VPFD (min)
VSO
tF
tPD
tFB
tR
tRB
tDR
trec
RST
INPUTS
RECOGNIZED
DON'T CARE
RECOGNIZED
OUTPUTS
VALID
(PER CONTROL INPUT)
HIGH-Z
VALID
(PER CONTROL INPUT)
AI03258
Table 12. Power Down/Up AC Characteristics
Symbol
Parameter(1)
Min
Max
Unit
tPD
E or W at VIH before Power Down
0
µs
tF(2)
VPFD (max) to VPFD (min) VCC Fall Time
300
µs
tFB(3)
VPFD (min) to VSS VCC Fall Time
10
µs
tR
VPFD (min) to VPFD (max) VCC Rise Time
10
µs
tRB
VSS to VPFD (min) VCC Rise Time
1
µs
trec
VPFD (max) to RST High
40
200
ms
Note: 1. Valid for Ambient Operating Temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5V, 4.75 to 5.5V, or 3.0 to 3.6V (except where noted).
2. VPFD (max) to VPFD (min) fall time of less than tF may result in deselection/write protection not occurring until 200µs after VCC pass-
es VPFD (min).
3. VPFD (min) to VSS fall time of less than tFB may cause corruption of RAM data.
Table 13. Power Down/Up Trip Points DC Characteristics
Symbol
Parameter(1,2)
Min
Typ
Max
Unit
M48T59
4.5
4.6
4.75
V
VPFD Power-fail Deselect Voltage
M48T59Y
4.2
4.35
4.5
V
M48T59V
2.7
2.9
3.0
V
M48T59/Y
3.0
V
VSO Battery Back-up Switchover Voltage
M48T59V
VPFD –100mV
V
tDR(3) Expected Data Retention Time
7
YEARS
Note: 1. Valid for Ambient Operating Temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5V, 4.75 to 5.5V, or 3.0 to 3.6V (except where noted).
2. All voltages referenced to VSS.
3. At 25°C, VCC = 0V.
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