M48Z129Y-85PM1TR 查看數據表（PDF） - STMicroelectronics
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M48Z129Y-85PM1TR Datasheet PDF : 16 Pages
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M48Z129Y*, M48Z129V
Figure 11. Power Down/Up Mode AC Waveforms
VCC
VPFD (max)
VPFD (min)
VSO
E
tF
tFB
tWPT
RECOGNIZED
tDR
tRB
DON'T CARE
OUTPUTS
RST
VALID
(PER CONTROL INPUT)
HIGH-Z
tR
tREC
RECOGNIZED
VALID
(PER CONTROL INPUT)
AI03610
Table 9. Power Down/Up AC Characteristics
Symbol
Parameter(1)
Min
Max
Unit
tF(2)
VPFD (max) to VPFD (min) VCC Fall Time
300
µs
tFB(3)
VPFD (min) to VSS VCC Fall Time
M48Z129Y
10
µs
M48Z129V
150
tR
VPFD (min) to VPFD (max) VCC Rise Time
10
µs
tRB
VSS to VPFD (min) VCC Rise Time
1
µs
tWPT
Write Protect Time
M48Z129Y
40
150
µs
M48Z129V
40
250
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 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 10. Power Down/Up Trip Points DC Characteristics
Symbol
Parameter(1,2)
Min
Typ
Max
VPFD Power-fail Deselect Voltage
M48Z129Y
4.2
4.35
4.5
M48Z129V
2.7
2.9
3.0
M48Z129Y
3.0
VSO
Battery Back-up Switchover Voltage
M48Z129V
2.45
tDR(3)
Expected Data Retention Time
10
Note: 1. All voltages referenced to VSS.
2. Valid for Ambient Operating Temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5V or 3.0 to 3.6V (except where noted).
3. At 25°C, VCC = 0V.
Unit
V
V
V
V
YEARS
12/16
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