M48T248V ST Microelectronics, M48T248V Datasheet - Page 19

• Manufacturer Part Number: M48T248V
• Description: 5.0 or 3.3V / 1024K TIMEKEEPER SRAM with PHANTOM
• Manufacturer: ST Microelectronics

Table 11. Phantom Clock AC Characteristics (M48T248Y)
Note: 1. Valid for Ambient Operating Temperature: T
t
t
t
t
t
t
t
t
t
t
t
t
t
t
WLWH
WHDX
GHQZ
ELQV
GLQV
ELQX
GLQX
EHQZ
EHAX
DVEH
EHDX
ELEH
AVAV
AVAV
2. These parameters are sampled with a 5 pF load and are not 100% tested.
3. t
4. t
5. t
Symbol
WE going high.
WP
WR
DH
and t
is specified as the logical AND of CE and WE. t
is a function of the latter occurring edge of WE or CE.
t
t
t
t
t
t
ODO
t
DH1
DH2
t
t
WP
WR
OD
t
DS
t
t
t
COE
t
t
OEE
t
RST
WC
CW
DS
RC
CO
OE
RR
(5)
(2)
(3)
(4)
(5)
(5)
(2)
are measured from the earlier of CE or WE going high.
READ Cycle Time
CE Access Time
OE Access Time
CE to Output Low Z
OE to Output Low Z
CE to Output High Z
OE to Output High Z
READ Recovery
WRITE Cycle Time
WRITE Pulse Width
WRITE Recovery
Data Setup Time
Data Hold Time from WE
Data Hold Time from CE
CE Pulse Width
RST Pulse Width
Parameter
A
(1)
= 0 to 70°C; V
WP
is measured from the latter of CE or WE going low to the earlier of CE or
CC
= 4.5 to 5.5V or 3.0 to 3.6V (except where noted).
Min
65
10
65
10
55
30
55
65
5
5
0
0
Typ
M48T248Y, M48T248V
Max
55
55
25
25
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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