m48z128 STMicroelectronics, m48z128 Datasheet - Page 14

• Manufacturer Part Number: m48z128
• Description: 5.0v Or 3.3v, 1 Mbit 128 Kbit X 8 Zeropower Sram
• Manufacturer: STMicroelectronics

M48Z128, M48Z128Y, M48Z128V*
Figure 12. Power Down/Up Mode AC Waveforms
Table 10. Power Down/Up AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: T
Table 11. Power Down/Up Trip Points DC Characteristics
Note: 1. All voltages referenced to V
14/21
Symbol
Symbol
t
V
t
V
DR
t
FB
t
t
t
2. V
3. V
2. Valid for Ambient Operating Temperature: T
3. At 25°C; V
F
PFD
WP
t
RB
ER
SO
(2)
R
(3)
(3)
es V
PFD
PFD
V CC
V PFD (max)
V PFD (min)
V SO
E
OUTPUTS
PFD
(max) to V
(min) to V
Power-fail Deselect Voltage
Battery Back-up Switchover Voltage
Expected Data Retention Time
V
V
V
V
Write Protect Time
E Recovery Time
(min).
PFD
PFD
PFD
SS
CC
to V
= 0V.
(max) to V
(min) to V
(min) to V
SS
PFD
PFD
fall time of less than t
(PER CONTROL INPUT)
(min) fall time of less than t
(min) V
RECOGNIZED
VALID
SS
PFD
tWP
PFD
SS
Parameter
tF
V
.
(max) V
CC
CC
(min) V
Rise Time
Fall Time
Parameter
FB
CC
CC
(1,2)
may cause corruption of RAM data.
A
A
Rise Time
Fall Time
tFB
= 0 to 70°C; V
= 0 to 70°C; V
F
may result in deselection/write protection not occurring until 200µs after V
(1)
M48Z128/Y
M48Z128Y
M48Z128V
M48Z128V
M48Z128
CC
CC
= 4.75 to 5.5V, 4.5 to 5.5V, or 3.0 to 3.6V (except where noted).
= 4.75 to 5.5V, 4.5 to 5.5V, or 3.0 to 3.6V (except where noted).
tDR
DON'T CARE
M48Z128/Y
M48Z128/Y
M48Z128V
M48Z128V
HIGH-Z
Min
4.5
4.2
2.8
10
tRB
Min
300
150
10
10
40
40
40
1
Typ
4.6
4.3
2.9
3.0
2.5
tR
(PER CONTROL INPUT)
Max
150
250
120
tER
RECOGNIZED
VALID
Max
4.75
4.5
3.0
AI01031
YEARS
Unit
ms
µs
µs
µs
µs
µs
Unit
CC
V
V
V
V
V
pass-