M48Z02-150PC1(2003) Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Lista de partido
M48Z02-150PC1 Datasheet PDF : 0 Pages
| |||
M48Z02, M48Z12
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 after Power Up
2
ms
Note: 1. Valid for Ambient Operating Temperature: TA = 0 to 70°C or –40 to 85°C; VCC = 4.75 to 5.5V or 4.5 to 5.5V (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
Unit
VPFD Power-fail Deselect Voltage
M48Z02
4.5
4.6
4.75
V
M48Z12
4.2
4.3
4.5
V
VSO
Battery Back-up Switchover Voltage
3.0
V
tDR(3)
Expected Data Retention Time
10
YEARS
Note: 1. All voltages referenced to VSS.
2. Valid for Ambient Operating Temperature: TA = 0 to 70°C or –40 to 85°C; VCC = 4.75 to 5.5V or 4.5 to 5.5V (except where noted).
3. At 25°C, VCC = 0V.
Figure 11. Crystal Accuracy Across Temperature
ppm
20
0
-20
-40
-60
∆F
F
= -0.038
ppm
C2
(T
-
T0)2
±
10%
T0 = 25 °C
-80
-100
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 °C
AI02124
11/16
Share Link: 