M48Z128-85PM1 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M48Z128-85PM1 Datasheet PDF : 20 Pages
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M48Z128, M48Z128Y, M48Z128V
DC and AC parameters
Figure 10. Power down/up mode AC waveforms
VCC
VPFD (max)
VPFD (min)
VSO
tF
tFB
tWP
E
RECOGNIZED
tDR
tRB
DON'T CARE
tR
tER
RECOGNIZED
OUTPUTS
VALID
(PER CONTROL INPUT)
HIGH-Z
VALID
(PER CONTROL INPUT)
AI01031
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
M48Z128/Y 10
M48Z128V 150
µs
tR
VPFD (min) to VPFD (max) VCC rise time
10
µs
tRB
VSS to VPFD (min) VCC rise time
1
µs
tWP
Write protect time
M48Z128/Y 40
150
µs
M48Z128V
40
250
tER
E recovery time
40
120
ms
1. Valid for ambient operating temperature: TA = 0 to 70 °C; VCC = 4.75 to 5.5 V, 4.5 to 5.5 V, or 3.0 to 3.6 V
(except where noted).
2. VPFD (max) to VPFD (min) fall time of less than tF may result in deselection/write protection not occurring
until 200 µs after VCC passes 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 Unit
M48Z128
4.5
4.6 4.75
V
VPFD Power-fail deselect voltage
M48Z128Y 4.2
4.3
4.5
V
M48Z128V 2.8
2.9
3.0
V
M48Z128/Y
3.0
VSO Battery backup switchover voltage
M48Z128V
2.5
tDR(3) Expected data retention time
10
V
V
YEARS
1. All voltages referenced to VSS.
2. Valid for ambient operating temperature: TA = 0 to 70 °C; VCC = 4.75 to 5.5 V, 4.5 to 5.5 V, or 3.0 to 3.6 V
(except where noted).
3. At 25 °C; VCC = 0 V.
Doc ID 2426 Rev 5
15/20
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