DS1244W-120 DALLAS [Dallas Semiconductor], DS1244W-120 Datasheet - Page 9

• Manufacturer Part Number: DS1244W-120
• Description: 256k NV SRAM with Phantom Clock
• Manufacturer: DALLAS [Dallas Semiconductor]

DC ELECTRICAL CHARACTERISTICS
Input Leakage Current
I/O Leakage Current
Output Current at 2.4V
Output Current at 0.4V
Standby Current CE = 2.2V
Standby Current
Operating Current t
Write Protection Voltage
Battery Switchover Voltage
CAPACITANCE
Input Capacitance
Input/Output Capacitance
MEMORY AC ELECTRICAL CHARACTERISTICS
Read Cycle Time
Access Time
Output High-Z from Deselection
Output Hold from Address Change
Write Cycle Time
Write Pulse Width
Address Setup Time
Write Recovery Time
Output High-Z from
Output Active from
Data Setup Time
Data Hold Time from
CE ³ V
CE = V
OE
CE
OE
to Output Valid
to Output Valid
or
CE
PARAMETER
IH
CC
PARAMETER
PARAMETER
≤ V
to Output Active
- 0.5V
CC
CYC
WE
WE
WE
= 70ns
SYMBOL
I
I
I
SYMBOL
V
V
I
CCS1
CCS2
I
CC01
I
I
OH
OL
IO
IL
SO
PF
C
C
SYMBOL
I/O
IN
t
t
t
t
t
t
t
t
ODW
t
t
t
t
t
OEW
t
ACC
COE
t
WC
AW
WR
WP
RC
OE
CO
OD
OH
DH
DS
MIN
2.80
-1.0
-1.0
-1.0
2.0
MIN
9 of 19
MIN
V
70
70
50
30
5
5
0
0
5
5
DS1244Y-70
BAT
TYP
2.86
2.0
5
TYP
or V
5
5
PF
Over the operating range (3.3V)
MAX
Over the operating range (5V)
70
35
70
25
25
MAX
MAX
+1.0
+1.0
2.97
3.0
10
10
50
7
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
UNITS
UNITS
mA
mA
mA
mA
mA
m A
m A
pF
pF
V
V
(T
A
NOTES
= +25°C)
NOTES
NOTES
5
5
3
5
5
4
4
12
11
11