M48T35-70MH1 STMICROELECTRONICS [STMicroelectronics], M48T35-70MH1 Datasheet - Page 6

• Manufacturer Part Number: M48T35-70MH1
• Description: 256 Kbit 32Kb x8 TIMEKEEPER SRAM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M48T35, M48T35Y
Table 8. Power Down/Up AC Characteristics
(T
Note: 1. V
Figure 5. Power Down/Up Mode AC Waveforms
6/18
A
Symbol
t
REC
t
= 0 to 70 °C or –40 to 85 °C)
t
FB
F
t
t
2. V
3. t
PD
t
RB
R
(1)
(2)
(3)
es V
REC
PFD
PFD
V CC
V PFD (max)
V PFD (min)
V SO
INPUTS
OUTPUTS
PFD
(min) = 20ms for industrial temperature grade (6) device.
(max) to V
(min) to V
E or W at V
V
V
V
V
V
(min).
PFD
PFD
PFD
SS
PFD
to V
(min) to V
(max) to V
(min) to V
(max) to Inputs Recognized
SS
PFD
tPD
PFD
fall time of less than t
(PER CONTROL INPUT)
(min) fall time of less than t
IH
(min) V
before Power Down
VALID
PFD
SS
RECOGNIZED
PFD
V
tF
(max) V
CC
CC
(min) V
Fall Time
Rise Time
Parameter
CC
FB
CC
may cause corruption of RAM data.
Rise Time
Fall Time
tFB
F
may result in deselection/write protection not occurring until 200µs after V
tDR
DON'T CARE
HIGH-Z
tRB
Min
300
10
10
40
0
1
tR
(PER CONTROL INPUT)
Max
tREC
200
RECOGNIZED
VALID
AI01168C
Unit
ms
µs
µs
µs
µs
µs
CC
pass-