参数资料
型号: AS5SS256K18DQ-9/XT
厂商: AUSTIN SEMICONDUCTOR INC
元件分类: SRAM
英文描述: 256K x 18 SSRAM Synchronous Burst SRAM, Flow-Through
中文描述: 256K X 18 STANDARD SRAM, 8.5 ns, PQFP100
封装: TQFP-100
文件页数: 3/13页
文件大小: 135K
代理商: AS5SS256K18DQ-9/XT
AS5SS256K18
Rev. 2.1 06/05
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
11
SSRAM
AS5SS256K18
Austin Semiconductor, Inc.
NOTE: 1. Q(A4) refers to output from address A4. Q(A4+1) refers to output from the next internal burst address following A4.
2. CE2\ and CE2 have timing identical to CE\. On this diagram, when CE\ is LOW, CE2\ is LOW and CE2 is HIGH. When CE\ is HIGH, CE2\ is HIGH and CE2 is LOW.
3. The data bus (Q) remains in High-Z following a WRITE cycle unless an ADSP\, ADSC\, or ADV\ cycle is performed.
4. GW\ is HIGH.
5. Back-to-back READs may be controlled by either ADSP\ or ADSC\.
6. Timing is shown assuming that the device was not enabled before entering into this sequence.
READ/WRITE TIMING6
MIN MAX MIN MAX MIN MAX
tKC
8.8
10
15
ns
tWS
1.5
1.8
2.0
ns
tKF
113
100
66
MHz
tDS
1.5
1.8
2.0
ns
tKH
2.5
3.0
4.0
ns
tCES
1.5
1.8
2.0
ns
tKL
2.5
3.0
4.0
ns
tAH
0.5
ns
tKQ
7.5
8.5
10
ns
tADSH
0.5
ns
tOELZ
00
0
ns
tWH
0.5
ns
tOEHZ
3.5
4.2
5.0
ns
tDH
0.5
ns
tAS
1.5
1.8
2.0
ns
tCEH
0.5
ns
tADSS
1.5
1.8
2.0
ns
-10
-9
-8
SYM
-10
UNITS
SYM
-8
-9
READ/WRITE PARAMETERS
123456789012345678
12345
123456789
12345
CLK
ADSP\
ADSC\
○○○○○○○○○○○○○○○○○○
○○○○○○○○○○○○○○○
○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○○○
○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○○○
○○○○○○○○
○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○
○○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○○
○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○○○
○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○○○
○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○○○
○○○○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○
ADDRESS
A2
BWE\, GW\
BWa\ - BWb\
○○○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○
CE\
(Note 2)
ADV\
OE\
Back-to-Back READS
(NOTE 5)
BURST
READ
○○○○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○
D
Back-to-Back
WRITE’s
12345
12345678
123
12345678
12345678901234567890123456789012123
12
1
A5
D(A5)
D(A6)
123456
123456789012345
1234567890123456789012345678901212345678
1234
12345
D(A3)
12345
A1
A3
12345678
123
A4
1234567890123
123456
12345678901234567890123456789012123456789012
12
SINGLE WRITE
t
KC
t
KL
t
KH
t
ADSS
t
ADSH
123456
12345
123456
123
A6
123
t
AS
12345
123456789
12345
t
AH
123456
12345
1234
123456789
1234
12345
123456
t
CES
t
CEH
t
WS
t
WH
12345678901234567
123456
1234
Q(A1)
123
Q(A2)
Q(A4)
Q(A4+1)
12
Q(A4+2)
12
Q(A4+3)
1
12
Q
High-Z
t
DS
t
DH
t
OELZ
t
KQ
(NOTE 1)
123456
Don’t Care
12345
Undefined
t
OEHZ
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