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參數(shù)資料
| 型號(hào)： | IDT7285L15PAI |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | DRAM |
| 英文描述： | CMOS DUAL ASYNCHRONOUS FIFO DUAL 256 x 9, DUAL 512 x 9,DUAL 1,024 x 9, DUAL 2,048 x 9,DUAL 4,096 x 9, DUAL 8,192 x 9 |
| 中文描述： | 8K X 9 BI-DIRECTIONAL FIFO, 15 ns, PDSO56 |
| 封裝： | TSSOP-56 |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大小： | 154K |
| 代理商： | IDT7285L15PAI |
8
COMMERCIAL TEMPERATURE RANGE
IDT7280/7281/7282/7283/7284/7285 5V ASYNCHRONOUS FIFO
DUAL 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9
Figure 13. Block Diagram of 256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18, 4,096 x 18, 8,192 x 18 FIFO Memory Used in Width Expansion Mode
Figure 12. Block Diagram of One 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9, 8,192 x 9 FIFO Used in Single Device Mode
USAGE MODES:
WIDTH EXPANSION
Word width may be increased simply by connecting the corresponding input
control signals of multiple FIFOs. Status flags (
EF
,
FF
and
HF
) can be detected
fromany one FIFO. Figure 13 demonstrates an 18-bit word width by using the
two FIFOs contained in the IDT7280/7281/7282/7283/7284/7285s. Any word
width can be attained by adding FIFOs (Figure 13).
BIDIRECTIONAL OPERATION
Applications which require data buffering between two systems (each
systemcapable of Read and Write operations) can be achieved by pairing
IDT7280/7281/7282/7283/7384/7285s as shown in Figure 16. Both Depth
Expansion and Width Expansion may be used in this mode.
DATA FLOW-THROUGH
Two types of flow-through modes are permtted, a read flow-through
and write flow-through mode. For the read flow-through mode (Figure 17),
the FIFO permts a reading of a single word after writing one word of data into
an empty FIFO. The data is enabled on the bus in (t
WEF
+ t
A
) ns after the rising
edge of
W
, called the first write edge, and it remains on the bus until the
R
line
is raised fromLOW-to-HIGH, after which the bus would go into a three-state
mode after t
RHZ
ns. The
EF
line would have a pulse showing temporary
deassertion and then would be asserted.
In the write flow-through mode (Figure 18), the FIFO permts the writing
of a single word of data immediately after reading one word of data froma
full FIFO. The
R
line causes the
FF
to be deasserted but the
W
line being LOW
causes it to be asserted again in anticipation of a new data word. On the rising
edge of
W
, the new word is loaded in the FIFO. The
W
line must be toggled when
FF
is not asserted to write new data in the FIFO and to increment the write pointer.
COMPOUND EXPANSION
The two expansion techniques described above can be applied together
in a straightforward manner to achieve large FIFO arrays (see Figure 15).
WRITE (
W
)
DATA IN (D)
FULL FLAG (
FF
)
RESET (
RS
)
9
READ (
R
)
9
DATA OUT (Q)
EMPTY FLAG (
EF
)
RETRANSMIT (
RT
)
EXPANSION IN (
XI
)
(
HF
)
FIFO
A or B
IDT
7280
7281
7282
7283
7284
7285
(HALF-FULL FLAG)
3208 drw 14
XIA
XIB
9
9
18
9
18
HFB
HFA
9
DATA
WRITE (
W
)
FULL FLAG (
FFA
)
RESET (
RS
)
(D)
IN
READ (
R
)
EMPTY FLAG (
EFB
)
RETRANSMIT (
RT
)
DATA
(Q)
OUT
3208 drw 15
FIFO A
FIFO B
7280/7281/7282/
7283/7284/7285
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IDT7285lL | CMOS DUAL ASYNCHRONOUS FIFO DUAL 256 x 9, DUAL 512 x 9,DUAL 1,024 x 9, DUAL 2,048 x 9,DUAL 4,096 x 9, DUAL 8,192 x 9 |
| IDT7282L12 | CMOS DUAL ASYNCHRONOUS FIFO DUAL 256 x 9, DUAL 512 x 9,DUAL 1,024 x 9, DUAL 2,048 x 9,DUAL 4,096 x 9, DUAL 8,192 x 9 |
| IDT7282L12PA | CMOS DUAL ASYNCHRONOUS FIFO DUAL 256 x 9, DUAL 512 x 9,DUAL 1,024 x 9, DUAL 2,048 x 9,DUAL 4,096 x 9, DUAL 8,192 x 9 |
| IDT7282L12PAI | CMOS DUAL ASYNCHRONOUS FIFO DUAL 256 x 9, DUAL 512 x 9,DUAL 1,024 x 9, DUAL 2,048 x 9,DUAL 4,096 x 9, DUAL 8,192 x 9 |
| IDT7282L15 | CMOS DUAL ASYNCHRONOUS FIFO DUAL 256 x 9, DUAL 512 x 9,DUAL 1,024 x 9, DUAL 2,048 x 9,DUAL 4,096 x 9, DUAL 8,192 x 9 |
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| IDT7285L15PAI8 | 功能描述:IC FIFO 4096X18 15NS 56TSSOP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:7200 標(biāo)準(zhǔn)包裝:90 系列:7200 功能:同步 存儲(chǔ)容量:288K（16K x 18） 數(shù)據(jù)速率:100MHz 訪問(wèn)時(shí)間:10ns 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應(yīng)商設(shè)備封裝:64-TQFP（14x14） 包裝:托盤(pán) 其它名稱:72271LA10PF |
| IDT7285L20PA | 功能描述:IC FIFO 4096X18 20NS 56TSSOP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:7200 標(biāo)準(zhǔn)包裝:90 系列:7200 功能:同步 存儲(chǔ)容量:288K（16K x 18） 數(shù)據(jù)速率:100MHz 訪問(wèn)時(shí)間:10ns 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應(yīng)商設(shè)備封裝:64-TQFP（14x14） 包裝:托盤(pán) 其它名稱:72271LA10PF |
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