M48Z08-100PC1(2010) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M48Z08-100PC1 Datasheet PDF : 20 Pages
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M48Z08, M48Z18
DC and AC parameters
Table 9. 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
0
-
µs
tRB
VSS to VPFD (min) VCC rise time
1
-
µs
trec
E or W at VIH before power-up
2
-
ms
1. Valid for ambient operating temperature: TA = 0 to 70 °C; VCC = 4.75 to 5.5 V or 4.5 to 5.5 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
VPFD Power-fail deselect voltage
M48Z08
4.5
4.6
4.75
V
M48Z18
4.2
4.3
4.5
V
VSO
tDR(3)
Battery backup switchover voltage
Expected data retention time
3.0
11
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 or 4.5 to 5.5 V (except where
noted).
3. At 25 °C, VCC = 0 V.
Doc ID 2424 Rev 7
15/20
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