參數(shù)資料
型號(hào): IDT70V27S55BF
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: DRAM
英文描述: HIGH-SPEED 3.3V 32K x 16 DUAL-PORT STATIC RAM
中文描述: 32K X 16 DUAL-PORT SRAM, 55 ns, PBGA144
封裝: 12 X 12 MM, 1.40 MM HEIGHT, FBGA-144
文件頁數(shù): 11/22頁
文件大?。?/td> 192K
代理商: IDT70V27S55BF
Commercial and Industrial Temperature Range
IDT 70V27S/L
High-Speed 3.3V 32K x 16 Dual-Port Static RAM
11
NOTES:
1. Transition is measured 0mV fromLow or High-impedance voltage with Output Test Load (Figure 2).
2. This parameter is guaranteed by device characterization, but is not production tested.
3. To access RAM
CE
= V
IL
and
SEM
= V
IH
. To access semaphore,
CE
= V
IH
and
SEM
= V
IL
. Either condition must be valid for the entire t
EW
time. Refer to Chip Enable
Truth Table.
4. The specification for t
DH
must be met by the device supplying write data to the RAMunder all operating conditions. Although t
DH
and t
OW
values will vary over voltage
and temperature, the actual t
DH
will always be smaller than the actual t
OW
.
5. 'X' in part numbers indicates power rating (S or L).
6. Industrial temperature: for other speeds, packages and powers contact your sales office.
0(8:(
8'-1;<
!4"@$
Symbol
Parameter
70V27X15
Coml Only
70V27X20
Coml Only
70V27X25
Coml Only
Unit
Mn.
Max.
Mn.
Max.
Mn.
Max.
WRITE CYCLE
t
WC
Write Cycle Time
15
____
20
____
25
____
ns
t
EW
Chip Enable to End-of-Write
(3)
12
____
15
____
20
____
ns
t
AW
Address Valid to End-of-Write
12
____
15
____
20
____
ns
t
AS
Address Set-up Time
(3)
0
____
0
____
0
____
ns
t
WP
Write Pulse Width
12
____
15
____
20
____
ns
t
WR
Write Recovery Time
0
____
0
____
0
____
ns
t
DW
Data Valid to End-of-Write
10
____
15
____
15
____
ns
t
HZ
Output High-Z Time
(1,2)
____
10
____
10
____
15
ns
t
DH
Data Hold Time
(4)
0
____
0
____
0
____
ns
t
WZ
Write Enable to Output in High-Z
(1,2)
____
10
____
10
____
15
ns
t
OW
Output Active fromEnd-of-Write
(1,2,4)
0
____
0
____
0
____
ns
t
SWRD
SEM
Flag Write to Read Time
5
____
5
____
5
____
ns
t
SPS
SEM
Flag Contention Window
5
____
5
____
5
____
ns
3603 tbl 13a
Symbol
Parameter
70V27X35
Com'l & Ind
70V27X55
Coml Only
Unit
Mn.
Max.
Mn.
Max.
WRITE CYCLE
t
WC
Write Cycle Time
35
____
55
____
ns
t
EW
Chip Enable to End-of-Write
(3)
30
____
45
____
ns
t
AW
Address Valid to End-of-Write
30
____
45
____
ns
t
AS
Address Set-up Time
(3)
0
____
0
____
ns
t
WP
Write Pulse Width
25
____
40
____
ns
t
WR
Write Recovery Time
0
____
0
____
ns
t
DW
Data Valid to End-of-Write
20
____
30
____
ns
t
HZ
Output High-Z Time
(1,2)
____
20
____
25
ns
t
DH
Data Hold Time
(4)
0
____
0
____
ns
t
WZ
Write Enable to Output in High-Z
(1,2)
____
20
____
25
ns
t
OW
Output Active fromEnd-of-Write
(1,2,4)
0
____
0
____
ns
t
SWRD
SEM
Flag Write to Read Time
5
____
5
____
ns
t
SPS
SEM
Flag Contention Window
5
____
5
____
ns
3603 tbl 13b
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