參數(shù)資料
型號(hào): IDT70V27L20PFI
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: DRAM
英文描述: Shaft; Style: 1 - light; Applicable Model: SE / SEFB
中文描述: 32K X 16 DUAL-PORT SRAM, 20 ns, PQFP100
封裝: 14 X 14 MM, 1.40 MM HEIGHT, TQFP-100
文件頁(yè)數(shù): 14/22頁(yè)
文件大小: 192K
代理商: IDT70V27L20PFI
Commercial and Industrial Temperature Range
IDT 70V27S/L
High-Speed 3.3V 32K x 16 Dual-Port Static RAM
0(8:(
8'-1;<
14
NOTES:
1. Port-to-port delay through RAMcells fromwriting port to reading port, refer to "Timng Waveformof Write with Port-to-Port Read and
BUSY
(M/
S
= V
IH
)".
2. To ensure that the earlier of the two ports wins.
3. t
BDD
is a calculated parameter and is the greater of 0, t
WDD
t
WP
(actual), or t
DDD
t
DW
(actual).
4. To ensure that the write cycle is inhibited on port "B" during contention on port "A".
5. To ensure that a write cycle is completed on port "B" after contention on port "A".
6. 'X' in part numbers indicates power rating (S or L).
7. Industrial temperature: for other speeds, packages and powers contact your sales office.
!@"A$
70V27X15
Com'l Only
70V27X20
Com'l Only
70V27X25
Com'l Only
Unit
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
BUSY TIMING (M/
S
=V
IH
)
t
BAA
BUSY
Access Time fromAddress Match
____
15
____
20
____
25
ns
t
BDA
BUSY
Disable Time fromAddress Not Matched
____
15
____
20
____
25
ns
t
BAC
BUSY
Access Time fromChip Enable Low
____
15
____
20
____
25
ns
t
BDC
BUSY
Disable Time fromChip Enable High
____
15
____
20
____
25
ns
t
APS
Arbitration Priority Set-up Time
(2)
5
____
5
____
5
____
ns
t
BDD
BUSY
Disable to Valid Data
(3)
____
17
____
35
____
35
ns
t
WH
Write Hold After
BUSY
(5)
12
____
15
____
20
____
ns
BUSY TIMING (M/
S
=V
IL
)
t
WB
BUSY
Input to Write
(4)
0
____
0
____
0
____
ns
t
WH
Write Hold After
BUSY
(5)
12
____
15
____
20
____
ns
PORT-TO-PORT DELAY TIMING
t
WDD
Write Pulse to Data Delay
(1)
____
30
____
45
____
55
ns
t
DDD
Write Data Valid to Read Data Delay
(1)
____
25
____
30
____
50
ns
3603 tbl 14a
70V27X35 Com'l
& Ind
70V27X55
Com'l Only
Unit
Symbol
Parameter
Min.
Max.
Min.
Max.
BUSY TIMING (M/
S
=V
IH
)
t
BAA
BUSY
Access Time fromAddress Match
____
35
____
45
ns
t
BDA
BUSY
Disable Time fromAddress Not Matched
____
35
____
45
ns
t
BAC
BUSY
Access Time fromChip Enable Low
____
35
____
45
ns
t
BDC
BUSY
Disable Time fromChip Enable High
____
35
____
45
ns
t
APS
Arbitration Priority Set-up Time
(2)
5
____
5
____
ns
t
BDD
BUSY
Disable to Valid Data
(3)
____
40
____
50
ns
t
WH
Write Hold After
BUSY
(5)
25
____
25
____
ns
BUSY TIMING (M/
S
=V
IL
)
t
WB
BUSY
Input to Write
(4)
0
____
0
____
ns
t
WH
Write Hold After
BUSY
(5)
25
____
25
____
ns
PORT-TO-PORT DELAY TIMING
t
WDD
Write Pulse to Data Delay
(1)
____
65
____
85
ns
t
DDD
Write Data Valid to Read Data Delay
(1)
____
60
____
80
ns
3603 tbl 14b
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