IDT71V2556S Integrated Device Technology, IDT71V2556S Datasheet - Page 12

• Manufacturer Part Number: IDT71V2556S
• Description: 128k X 36, 256k X 18 3.3v Synchronous Zbt Srams 2.5v I/o, Burst Counter Pipelined Outputs
• Manufacturer: Integrated Device Technology

Burst Read Operation
NOTES:
1. H = High; L = Low; X = Don’t Care; Z = High Impedance..
2. CE = L is defined as CE
Write Operation
NOTES:
1. H = High; L = Low; X = Don’t Care; Z = High Impedance.
2. CE = L is defined as CE
Burst Write Operation
NOTES:
1. H = High; L = Low; X = Don’t Care; ? = Don’t Know; Z = High Impedance.
2. CE = L is defined as CE
IDT71V2556, IDT71V2558, 128K x 36, 256K x 18, 3.3V Synchronous ZBT™ SRAMs
with 2.5V I/O, Burst Counter, and Pipelined Outputs
Cycle
Cycle
Cycle
n+1
n+2
n+3
n+4
n+5
n+6
n+7
n+8
n+1
n+2
n+1
n+2
n+3
n+4
n+5
n+6
n+7
n+8
n
n
n
Address
Address
Address
A
A
A
A
A
A1
A
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
2
0
0
2
1
1
1
1
= L, CE
= L, CE
= L, CE
R/W
R/W
R/W
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H
H
H
L
L
L
L
(1)
2
2
2
= L and CE
= L and CE
= L and CE
ADV/LD
ADV/LD
ADV/LD
X
X
L
H
H
H
H
L
H
H
L
L
L
H
H
H
H
L
H
H
L
(1)
(1)
2
2
2
= H. CE = H is defined as CE
= H. CE = H is defined as CE
= H. CE = H is defined as CE
CE
CE
CE
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
L
L
(2)
(2)
(2)
CEN
CEN
CEN
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
BWx
BWx
BWx
6.42
X
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
L
L
L
L
L
1
12
1
1
= H, CE
= H, CE
= H, CE
OE
OE
OE
X
X
2
X
X
X
2
X
X
X
X
X
X
X
X
X
2
L
L
L
L
L
L
L
= H or CE
= H or CE
= H or CE
Q
Q
D
D
Q
Q
D
D
I/O
I/O
I/O
Q
Q
Q
D
D
D
D
X
X
X
X
X
X
0+2
0+3
0+1
0+2
0+3
1+1
0+1
1+1
2
2
2
0
0
0
0
0
1
1
Commercial and Industrial Temperature Ranges
= L.
= L.
= L.
Comments
Clock Setup Valid, Advance Counter
Comments
Clock Setup Valid
Comments
Clock Setup Valid, Inc. Count
Address and Control meet setup
Address A
Address A
Address A
Address A
Address A
Address A
Address A
Address and Control meet setup
Write to Address A
Address and Control meet setup
Address A
Address A
Address A
Address A
Address A
Address A
Address A
0
0+1
0+2
0+3
0
1
1+1
0
0+1
0+2
0+3
0
1
1+1
Write, Inc. Count
Read Out, Inc. Count
Read Out, Inc. Count
Read Out, Inc. Count
Write, Inc. Count
Write, Inc. Count
Write, Inc. Count
Write, Inc. Count
Read Out, Load A
Read Out, Inc. Count
Read Out, Inc. Count
Read Out, Load A
Write, Load A
Write, Load A
0
1
2
1
2
4875 tbl 14
4875 tbl 15
4875 tbl 16