參數(shù)資料
型號(hào): IDT72291L10PFG8
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: FIFO
英文描述: 128K X 9 OTHER FIFO, 6.5 ns, PQFP64
封裝: PLASTIC, TQFP-64
文件頁(yè)數(shù): 9/26頁(yè)
文件大小: 270K
代理商: IDT72291L10PFG8
17
COMMERCIALANDINDUSTRIAL
TEMPERATURERANGES
IDT72281/72291
CMOS SuperSync FIFO 65,536 x 9 and 131,072 x 9
Figure 8. Read Cycle, Empty Flag and First Data Word Latency Timing (IDT Standard Mode)
NOTES:
1. tSKEW3 is the minimum time between a rising WCLK edge and a rising RCLK edge to guarantee that
EF will go HIGH (after one RCLK cycle plus tREF). If the time between
the rising edge of WCLK and the rising edge of RCLK is less than tSKEW3, then
EF deassertion may be delayed one extra RCLK cycle.
2.
LD = HIGH.
NOTES:
1. tSKEW1 is the minimum time between a rising RCLK edge and a rising WCLK edge to guarantee that
FF will go high (after one WCLK cycle pus tWFF). If the time between the
rising edge of the RCLK and the rising edge of the WCLK is less than tSKEW1, then the
FF deassertion may be delayed one extra WCLK cycle.
2.
LD = HIGH, OE = LOW, EF = HIGH.
Figure 7. Write Cycle and Full Flag Timing (IDT Standard Mode)
D0 - Dn
WEN
RCLK
REN
tENH
Q0 - Qn
DATA READ
NEXT DATA READ
DATA IN OUTPUT REGISTER
tSKEW1
(1)
4675 drw 10
WCLK
NO WRITE
1
2
1
2
tDS
NO WRITE
tWFF
tENS
tSKEW1
(1)
tDS
D X
tDH
DX+1
tWFF
tDH
tCLK
tCLKL
tCLKH
tA
RCLK
REN
4675 drw 11
EF
tENH
tREF
tA
tOLZ
tOE
Q0 - Qn
OE
WCLK
(1)
tSKEW3
WEN
D0 - Dn
tENS
tENH
tDS
tDHS
D0
1
2
tOLZ
LAST WORD
D0
D1
tENS
tENH
tDS
tDH
tOHZ
LAST WORD
tENH
tENS
tA
tENS
tENH
tCLK
tCLKH
tCLKL
tREF
NO OPERATION
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