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IDT71256S Datasheet(PDF) 6 Page - Integrated Device Technology

Part No. IDT71256S
Description  CMOS STATIC RAM 256K (32K x 8-BIT)
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Maker  IDT [Integrated Device Technology]
Homepage  http://www.idt.com
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 6 page
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7.2
6
IDT71256 S/L
CMOS STATIC RAM 256K (32K x 8-BIT)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
AC ELECTRICAL CHARACTERISTICS (VCC = 5.0V
± 10%, All Temperature Ranges)
71256S55
(1)
71256S70
(1)
71256S85
(1)
71256S100
(1,3)
71256L55
(1)
71256L70
(1)
71256L85
(1)
71256L100
(1,3)
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Unit
Read Cycle
tRC
Read Cycle Time
55
70
85
100
ns
tAA
Address Access Time
55
70
85
100
ns
tACS
Chip Select Access Time
55
70
85
100
ns
tCLZ
(2)
Chip Deselect to Output in Low-Z
5
5
5
5
ns
tCHZ
(2)
Output Enable to Output in Low-Z
25
30
35
40
ns
tOE
Output Enable to Output Valid
25
30
35
40
ns
tOLZ
(2)
Output Enable to Output in Low-Z
0
0
0
0
ns
tOHZ
(2)
Output Disable to Output in High-Z
0
25
0
30
35
40
ns
tOH
Output Hold from Address Change
5
5
5
5
ns
Write Cycle
tWC
Write Cycle Time
55
70
85
100
ns
tCW
Chip Select to End-of-Write
50
60
70
80
ns
tAW
Address Valid to End-of-Write
50
60
70
80
ns
tAS
Address Set-up Time
0
0
0
0
ns
tWP
Write Pulse Width
40
45
50
55
ns
tWR
Write Recovery Time
0
0
0
0
ns
tDW
Data to Write Time Overlap
25
30
35
40
ns
tDH
Data Hold from Write Time (
WE)0
0
0
0
ns
tWHZ
(2)
Write Enable to Output in High-Z
25
30
35
40
ns
tOW
(2)
Output Active from End-of-Write
5
5
5
5
ns
NOTES:
2946 tbl 11
1. –55
°C to +125°C temperature range only.
2. This parameter guaranteed by device characterization, but is not production tested.
3. Also available: 120 and 150 ns military devices.




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