参数资料
型号: 72225LB25TFG
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: FIFO
英文描述: 1K X 18 OTHER FIFO, 15 ns, PQFP64
封装: GREEN, PLASTIC, STQFP-64
文件页数: 2/16页
文件大小: 178K
代理商: 72225LB25TFG
10
IDT72205LB/72215LB/72225LB/72235LB/72245LB CMOS SyncFIFOTM
256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18 and 4,096 x 18
COMMERCIALANDINDUSTRIAL
TEMPERATURERANGES
OCTOBER 22, 2008
NOTES:
1. When tSKEW2 minimum specification, tFRL (maximum) = tCLK + tSKEW2. When tSKEW2 < minimum specification, tFRL (maximum) = either 2*tCLK + tSKEW2 or tCLK + tSKEW2.
The Latency Timing applies only at the Empty Boundary (
EF = LOW).
2. The first word is available the cycle after
EF goes HIGH, always.
Figure 7. First Data Word Latency after Reset with Simultaneous Read and Write
Figure 8. Full Flag Timing
WCLK
D0 - D17
RCLK
Q0 - Q17
t DS
tSKEW2
t ENS
t REF
tA
0
12
3
D
DDD
01
DD
(first valid write)
t OE
t OLZ
tA
tFRL(1)
D4
tENS
2766 drw 09
NOTE:
1. tSKEW1 is the minimum time between a rising RCLK edge and a rising WCLK edge to guarantee that
FF will 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 tSKEW1, then
FF may not change state until the next WCLK edge.
DATA READ
WCLK
D0 - D17
RCLK
Q0 - Q17
t A
t WFF
DATA WRITE
t WFF
t ENH
t ENS
t DS
t WFF
t DS
DATA
WRITE
NEXT DATA READ
t A
NO WRITE
DATA IN OUTPUT REGISTER
LOW
tSKEW1
(1)
t SKEW1
(1)
t ENH
t ENS
2766 drw 10
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