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參數(shù)資料
| 型號： | IDT72031L25JB |
| 廠商： | Integrated Device Technology, Inc. |
| 英文描述： | CMOS ASYNCHRONOUS FIFO WITH RETRANSMIT 1K x 9, 2K x 9, 4K x 9 |
| 中文描述： | 異步FIFO的CMOS帶重傳每1000 × 9和2K × 9，4K的× 9 |
| 文件頁數(shù)： | 12/14頁 |
| 文件大?。?/td> | 153K |
| 代理商： | IDT72031L25JB |
5.09
12
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT72021, IDT72031, IDT72041
CMOS ASYNCHRONOUS FIFO WITH RETRANSMIT 1K x 9, 2K x 9, 4K x 9
TABLE I—RESET AND RETRANSMIT
Single Device Configuration/Width Expansion Mode
Inputs
RT
X
0
1
Internal Status
Outputs
FF
1
X
X
Mode
RS
0
1
1
XI
0
0
0
Read Pointer
Location Zero
Location Zero
Increment
(1)
Write Pointer
Location Zero
Unchanged
Increment
(1)
EF
0
X
X
HF
1
X
X
AEF
0
X
X
Reset
Retransmit
Read/Write
NOTE:
1. Pointer will increment if flag is HIGH.
2677 tbl 11
TABLE II—RESET AND FIRST LOAD TRUTH TABLE
Depth Expansion/Compound Expansion Mode
Inputs
FL
0
1
X
Internal Status
Outputs
Mode
RS
0
0
1
XI
(1)
(1)
(1)
Read Pointer
Location Zero
Location Zero
Write Pointer
Location Zero
Location Zero
EF
0
0
X
FF
1
1
X
Reset First Device
Reset All Other Devices
Read/Write
X
X
NOTE:
1.
XI
is connected to
XO
of previous device. See Figure 15.
RS
= Reset Input
FL
/
RT
= First Load/Retransmit,
EF
= Empty Flag Output,
FF
= Flag Full Output,
XI
= Expansion Input,
HF
= Half-Full Flag Output,
AEF
= Almost Empty/Almost Full Flag.
2677 tbl 12
In the write flow-through mode (Figure 18), the FIFO
permits the writing of a single word of data immediately after
reading one word of data from a 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.
For additional information refer to Tech Note 8: “Operating
FIFOs on Full and Empty Boundary Conditions” and Tech
Note 6: “Designing with FIFOs”.
IDT
72021/
031/041
D
W
IDT
72021/
031/041
IDT
72021/
031/041
FF
FF
FF
EF
FL
FL
EF
EF
FL
XO
XI
XO
XI
RS
FULL
EMPTY
V
CC
R
2677 drw 18
9
9
9
9
XI
XO
9
Q
TRUTH TABLES
Figure 15. Block Diagram of 3K/6K/12K x 9 FIFO Memory (Depth Expansion)
NOTE:
1. IDT only guarantees depth expansion with identical IDT part numbers and speed.
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| IDT7203L12J | 功能描述:IC MEM FIFO 2048X9 12NS 32-PLCC RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:7200 標準包裝:80 系列:7200 功能:同步 存儲容量:18.4K（1K x 18） 數(shù)據(jù)速率:- 訪問時間: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（10x10） 包裝:托盤 其它名稱:72225LB10TF |
| IDT7203L12J8 | 功能描述:IC MEM FIFO 2048X9 12NS 32-PLCC RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:7200 標準包裝:80 系列:7200 功能:同步 存儲容量:18.4K（1K x 18） 數(shù)據(jù)速率:- 訪問時間: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（10x10） 包裝:托盤 其它名稱:72225LB10TF |
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