DS2227 Maxim, DS2227 Datasheet - Page 6

• Manufacturer Part Number: DS2227
• Description: The DS2227 combines voltage monitoring circuitry with lithium-backed memory in a flexible architecture that can be accessed as 128k x 32, 256k x 16, or 512k x 8 bits
• Manufacturer: Maxim

AC ELECTRICAL CHARACTERISTICS
Read Cycle Time
Access Time
Valid
Valid
Output Active
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
OE
CE
OE
PARAMETER
to Output
to Output
or
WE
WE
WE
CE
to
SYMBOL
t
t
t
t
t
t
t
ODW
t
t
t
t
OEW
t
t
t
t
ACC
COE
AW
WC
WR
RC
CO
OD
OH
WP
DH
OE
DS
MIN MAX MIN MAX MIN MAX
DS2227-70
70
70
55
20
30
20
5
5
0
5
70
35
70
25
25
6 of 10
DS2227-100
100
100
75
20
40
20
5
5
0
5
100
100
50
35
35
DS2227-120
120
120
90
20
50
20
5
5
0
5
120
120
60
40
40
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
4,5,10
3,10
8,10
4,10
10
10
10
10
10
10
10
10
10
10
10
DS2227