DS1244Y-120 DALLAS [Dallas Semiconductor], DS1244Y-120 Datasheet - Page 6

• Manufacturer Part Number: DS1244Y-120
• Description: 256K NV SRAM with Phantom Clock
• Manufacturer: DALLAS [Dallas Semiconductor]

MEMORY AC ELECTRICAL CHARACTERISTICS
AC TEST CONDITIONS
Output Load:
Input Pulse Levels:
Timing Measurement Reference Levels
Input:
Output:
Input Pulse Rise and Fall Times:
DS1244Y
032697 6/12
PARAMETER
PARAMETER
Read Cycle Time
Access Time
OE to Output Valid
CE to Output Valid
OE or CE to 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 WE
Output Active from WE
Data Setup Time
Data Hold Time from WE
50 pF + 1TTL Gate
0-3V
1.5V
1.5V
SYMBOL
SYMBOL
t
t
t
t
ODW
t
t
OEW
t
COE
t
t
t
t
ACC
t
t
t
t
WC
WR
WP
AW
RC
OE
CO
OD
DS
DH
oH
5 ns
MIN
DS1244Y-120
120
120
90
20
50
20
5
5
0
5
MAX
120
120
60
40
40
MIN
DS1244Y-150
150
150
100
20
60
20
5
5
0
5
MAX
150
150
70
70
70
(0 C to 70 C; V
DS1244Y-200
MIN
200
200
150
20
80
20
5
5
0
5
MAX
200
100
200
100
80
CC
UNITS
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
= 5.0V
NOTES
NOTES
5
5
3
5
5
4
4
10%)