參數(shù)資料
型號(hào): 72231L15PFI8
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: FIFO
英文描述: 2K X 9 OTHER FIFO, 10 ns, PQFP32
封裝: TQFP-32
文件頁(yè)數(shù): 3/14頁(yè)
文件大?。?/td> 155K
代理商: 72231L15PFI8
11
COMMERCIALANDINDUSTRIAL
TEMPERATURERANGES
IDT72421/72201/72211/72221/72231/72241/72251 CMOS SyncFIFO
64 x 9, 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9
Figure 11. Programmable Empty Flag Timing
NOTES:
1. n =
PAE offset.
2. tSKEW2 is the minimum time between a rising WCLK edge and a rising RCLK edge for
PAE to change during that clock cycle. If the time between the rising edge of WCLK and
the rising edge of RCLK is less than tSKEW2, then
PAE may not change state until the next RCLK rising edge.
3.
If a read is performed on this rising edge of the Read Clock, there will be Empty + (n-1) words in the FIFO when
PAE goes LOW.
NOTES:
1. m =
PAF offset .
2.
64-m words in FIFO for IDT72421, 256-m words for IDT72201, 512-m words for IDT72211, 1,024-m words for IDT72221, 2,048-m words for IDT72231, 4,096-m words for IDT72241,
and 8,192-m words for IDT72251.
3. tSKEW2 is the minimum time between a rising RCLK edge and a rising WCLK edge for
PAF to change during that clock cycle. If the time between the rising edge of RCLK and
the rising edge of WCLK is less than tSKEW2, then
PAF may not change state until the next WCLK rising edge.
4. If a write is performed on this rising edge of the Write Clock, there will be Full - (m-1) words in the FIFO when
PAF goes LOW.
Figure 10. Programmable Full Flag Timing
tENS
tENH
tENS
tENH
tENS
tENH
WCLK
WEN1
WEN2
(If Applicable)
PAF
RCLK
REN1,
REN2
(4)
(1)
tPAF
Full - (m+1) words in FIFO
Full - m words in FIFO
(2)
tCLKH
tCLKL
tSKEW2
(3)
tPAF
2655 drw 12
WCLK
WEN1
WEN2
PAE
RCLK
REN1,
REN2
tENS
tENH
tENS
tENH
tSKEW2
(2)
tENS
tENH
(If Applicable)
tPAE
(3)
(1)
n words in FIFO
n+1 words in FIFO
tCLKH
tCLKL
2655 drw 13
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