參數(shù)資料
型號(hào): IDT72825LB20PFI
廠商: Integrated Device Technology, Inc.
英文描述: CMOS DUAL SyncFIFO DUAL 256 x 18, DUAL 512 x 18, DUAL 1,024 x 18, DUAL 2,048 x 18, and DUAL 4,096 x 18
中文描述: CMOS雙SyncFIFO雙256 × 18,雙512 × 18,雙1,024 × 18,雙2,048 × 18,雙4,096 × 18
文件頁(yè)數(shù): 20/26頁(yè)
文件大?。?/td> 334K
代理商: IDT72825LB20PFI
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72805LB/72815LB/72825LB/72835LB/72845LB CMOS Dual SyncFIFO
TM
256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18 and 4,096 x 18
20
Figure 22. Synchronous Programmable Almost-Empty Flag Timing (IDT Standard and FWFT Modes)
Figure 23. Synchronous Programmable Almost-Full Flag Timing (IDT Standard and FWFT Modes)
NOTES:
1. n =
PAE
offset.
2. For IDT Standard Mode.
3. For FWFT Mode.
4. t
SKEW2
is the mnimumtime between a rising WCLK edge and a rising RCLK edge for
PAE
to go HIGH during the current clock cycle. If the time between the rising edge of WCLK and the
rising edge of RCLK is less than t
SKEW2
, then the
PAE
deassertion may be delayed one extra RCLK cycle.
5.
PAE
is asserted and updated on the rising edge of RCLK only.
6. Select this mode by setting (
FL
,
RXI
,
WXI
) = (1,0,0), (1,0,1), or (1,1,0) during Reset.
NOTES:
1. m=
PAF
offset.
2. D = maximumFIFO Depth.
In IDT Standard Mode: D = 256 for the IDT72805, 512 for the IDT72815, 1,024 for the IDT72825, 2,048 for the IDT72835 and 4,096 for the IDT72845.
In FWFT Mode:
D = 257 for the IDT72805, 513 for the IDT72815, 1,025 for the IDT72825, 2,049 for the IDT72835 and 4,097 for the IDT72845.
3. t
SKEW2
is the mnimumtime between a rising RCLK edge and a rising WCLK edge for
PAF
to go HIGH during the current clock cycle. If the time between the rising edge of RCLK and
the rising edge of WCLK is less than t
SKEW2
, then the
PAF
deassertion time may be delayed an extra WCLK cycle.
4.
PAF
is asserted and updated on the rising edge of WCLK only.
5. Select this mode by setting (
FL
,
RXI
,
WXI
) = (1,0,0), (1,0,1), or (1,1,0) during Reset.
WCLK
t
ENH
t
CLKH
t
CLKL
WEN
PAE
RCLK
REN
3139 drw 22
t
ENS
t
ENH
t
ENS
n words in FIFO
(2)
,
n + 1words in FIFO
(3)
n + 1 words in FIFO
(2)
,
n + 2 words in FIFO
(3)
t
SKEW2
t
PAES
n Words in FIFO
(2)
,
n + 1 words in FIFO
(3)
(4)
t
PAES
WCLK
t
ENH
t
CLKH
t
CLKL
WEN
PAF
RCLK
REN
3139 drw 23
t
ENS
t
ENH
t
ENS
D-(m+1) Words in
FIFO
D - m Words in FIFO
D -(m+1) Words
in FIFO
t
PAFS
t
PAFS
t
SKEW2
(3)
相關(guān)PDF資料
PDF描述
IDT72825LB35BG CMOS DUAL SyncFIFO DUAL 256 x 18, DUAL 512 x 18, DUAL 1,024 x 18, DUAL 2,048 x 18, and DUAL 4,096 x 18
IDT72835LB CMOS DUAL SyncFIFO DUAL 256 x 18, DUAL 512 x 18, DUAL 1,024 x 18, DUAL 2,048 x 18, and DUAL 4,096 x 18
IDT72835LB10PF CMOS DUAL SyncFIFO DUAL 256 x 18, DUAL 512 x 18, DUAL 1,024 x 18, DUAL 2,048 x 18, and DUAL 4,096 x 18
IDT72835LB10PFI CMOS DUAL SyncFIFO DUAL 256 x 18, DUAL 512 x 18, DUAL 1,024 x 18, DUAL 2,048 x 18, and DUAL 4,096 x 18
IDT72835LB15BG CMOS DUAL SyncFIFO DUAL 256 x 18, DUAL 512 x 18, DUAL 1,024 x 18, DUAL 2,048 x 18, and DUAL 4,096 x 18
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